Changelog for GXemul: --------------------- 20030829 Skeleton. ELF stuff. Some instructions. 20030830 Simple test programs using +-*/^|&%, function calls, loops, and stuff like that work. 20030903 Adding more instructions, fixing some bugs. 20030907 Making adding of memory mapped devices easier, although the framework isn't built for speed. Adding a -q switch to turn of debug output. 20030911 Trying to fix some bugs. Minor changes. Some COP0 registers are now meaningful. 20030919 Making APs (non-bootstrap cpus) available via a simple 'mp' device. Implementing ll/lld and sc/scd (for atomic memory updates, needed by MP operating systems). 20030923 Minor updates: more instructions (divu, mulu, lwu, perhaps some more), and opcode usage statistics. 20030924 If the next instruction is nullified (for 'branch likely' type of instructions), counters for delays etc are now decreased as they should. Adding some comments. Adding instructions: movz, movn. Adding a simple mandelbrot test to mipstest.c. 20030925 Adding instructions: bltzl, bgezl, lh, lhu, sh, mfc*, mtc*. Adding a dummy instructions: sync, cache. Adding minimal DECstation PROM functionality: printf() and getsysid() callback functions. Beginning work on address translation. 20030927 Adding some more cop0 functionality (tlb stuff). Adding mc146818 real-time clock. (Skeleton stuff.) 20030928 Adding a dc7085 serial console device (dummy, but enough to output chars to the screen). NetBSD uses this for the MIPSMATE 5100. 20030929 Working on the TLB stuff. Adding instructions: srlv, tlbwr, tlbr, tlbp, eret. 20030930 Trying to find a bug which causes NetBSD to bug out, but it is really hard. Adding some a.out support (for loading an old OpenBSD 2.8/pmax kernel image). Adding instructions: lwc*, ldc*, swc1 and swc3. Beginning to add special code to handle the differences between R4000 (the default emulation) and R2000/R3000. 20031001 Symbol listings produced by 'nm -S' can be used to show symbolic names for addresses. (-S) 20031002 Fixing the i/d fake cache for R2000/R3000. It's still just an ugly hack, though. Fixing minor bugs to make the 3100 emulation use the dc device (serial console) correctly. So far, 5100 and 3100 are the only ones that get far enough to print stuff, when booting NetBSD. 20031004 Adding skeleton Cobalt machine emulation (-E). Adding a dummy ns16550 serial controller, used by the Cobalt machine emulation. 20031006 Adding unaligned load/store instructions (lwl, lwr, ldl, ldr, swl, swr, sdl, sdr), although they are not tested yet. Fixed a "data modified on freelist" bug when running NetBSD/cobalt: setting the top bit of the index register when a tlbp fails (as the R4000 manual says) isn't sufficient, I had to clear the low bits as well. Adding break and syscall instructions, but they are not tested yet. Adding a 'gt' device, faking a PCI bus, for the Cobalt emulation. 20031008 Adding initial support for HPCmips (-F), a framebuffer device using X11. NetBSD/hpcmips can output pixels to the framebuffer, but that's about it. 20031009 Fixing the NetBSD/pmax bug: the "0/tftp/netbsd" style bootstring was only passed correctly in the bootinfo block, it needs to be passed as argv[0] as well. Adding instructions: mtlo, mthi. Rearrangning the source tree layout. Adding console input functionality. The NetBSD/cobalt kernel's ddb can now be interacted with. 20031010 Adding experimental (semi-useless) -t option, to show a function call tree while a program runs. Linux/cobalt now prints a few messages, but then hangs at "Calibrating delay loop..." unless an ugly hack is used (setting a word of memory at 0x801e472c to non-zero). 20031013 Adding a framebuffer device used in DECstation 3100; VFB01 for mono is implemented so far, not yet the VFB02 (color) variant. Rewriting the framebuffer device so that it is usable by both HPCmips and DECstation emulation. 20031014 Minor fixes. Everything should compile and run ok both with and without X11. 20031015 Adding support for ECOFF binary images; text, data, and symbols are loaded. (Playing around with ultrixboot and ultrix kernels.) 20031016 The DECstation argv,argc stuff must be at 0xa0000000, not 0x80000000, or Ultrix kernels complain. Adding R2000/R3000 'rfe' instruction. Implementing more R2K/R3K tlb specific stuff, so that NetBSD boots and uses the tlb correctly, but much of it is ugly. (Needs to be separated in a cleaner way.) ECOFF symbols sizes are now calculated, so that offsets within symbols are usable. 20031017 DECstation bootstrings now automatically include the correct name of the kernel that is booting. Ultrix boots a bit. 20031018 ELF symbols are now read automatically from the binary. -t trace looks a bit better (string arguments are shown). Trying to get initial R5900 stuff working (the 128-bit CPU used in Playstation 2). Fixing a minor bug to make the VFB02 (color framebuffer) device work better, but it is still just 256 grayscales, not real color. Ultrix can now use the framebuffer (it calls it PMAX-CFB). A machine can now consist of CPUs of different types. Adding instructions: daddi, mov_xxx, mult_xx. The xxx instructions are not documented MIPS64 instructions, but NetBSD/playstation2 uses them. Perhaps VR5432 instructions? Adding sign-extension to 32-bit mult. Adding Playstation 2 devices: dmac (DMA controller), gs (Graphic something?), and gif (graphics something else, which has access to the PS2's framebuffer). NetBSD/playstation2 works a bit, and prints a few bootup messages. 20031020 The cpu_type field of the cpu struct now contains usable values in a much better form than before. This simplifies adding of new CPU types. 20031021 Fixing an interrupt related bug: pc_last was used, but for interrupts this was incorrect. Fixed now. Fixing a load/store related bug: if a load into a register was aborted due to an exception, the register was still modified. The mc146818 rtc now reads its time from the system's time() function. Fixing another exception bug: if loading an instruction caused an exception, something bogus happened as the emulator tried to execute the instruction anyway. This has been fixed now. 20031023 Adding a quick hack which skips "while (reg --) ;" kind of loops. NetBSD/pmax suddenly reached userland (!), but only once and attempts to repeat it have failed. I believe it is problems with my interrupt handling system. 20031024 Adding 8-bit color palette support to the framebuffer. Connecting the pmax vdac device to the framebuffer's rgb palette. Fixing a bug in the dc device, so that console input is possible; interaction with NetBSD/pmax's built-in kernel debugger works now. Symbol sizes for file formats where symbol size isn't included are now calculated regardless of file format. Physical memory space can now be smaller than 64 bits, improving emulation speed a bit. Doing other minor performance enhancements by moving around some statements in critical parts of the code. 20031025 Minor changes to the dc device. 20031026 Adding support for reading symbols directly from a.out files. (Works with OpenBSD/pmax binaries.) Hardware devices may now register "tick functions" at specific cycle intervals in a generic fashion. All four channels of the dc serial controller device should now work; playing around with keyboard scan code generation when using the DECstation framebuffer. Making various (speed) improvements to the framebuffer device. 20031027 Playing around with the sii SCSI controller. 20031028 Minor fixes. Adding an SGI emulation mode (-G), and some ARCBIOS stuff, which SGIs seem to use. Adding getbitmap() to the DEC prom emulation layer, so some more -D x models become more usable. Adding a dummy 'ssc' serial console device for DECsystem 5400 emulation. Playing around with TURBOchannel stuff. 20031030 Minor fixes. Adding the sub instruction. (Not tested yet?) Sign-extending the results of multu, addi,addiu, add,addu,sub,subu,mfcZ. Adding a colorplanemask device for DECstation 3100. Fixed the NetBSD/pmax bug: I had forgotten to reset asid_match to 0 between tlb entry checks. :-) Now userland runs nicely... 20031031 Fixing more bugs: unaligned load/store could fail because of an exception, but registers could be "half updated". This has been fixed now. (As a result, NetBSD/pmax can now run with any of r2000,r3000,r4000, r4400, or r5000.) Adding some R5K and R10000 stuff. (Note: R5K is NOT R5000. Weird.) Adding dummy serial console (scc) for MAXINE. MAXINE also works with framebuffer, but there is no color palette yet (only black and white output). 20031101 Moving code chunks around to increase performance by a few percent. The opcode statistics option (-s) now shows opcode names, and not just numbers. :-) Fixing the bug which caused NetBSD/pmax to refuse input in serial console mode, but not in keyboard/ framebuffer mode: the osconsole environment variable wasn't set correctly. Adding DEC PROM getchar() call. The transmitter scanner of the dc device now scans all four channels at once, for each tick, so serial output is (approximately) 4 times faster. 20031103 Adding a dummy BT459 vdac device, which does nothing but allows a PMAG-BA turbochannel graphics card to be used as framebuffer. Several DECstation machines (-D 2, 3, and 4) can now use TURBOchannel option card framebuffers as console, for output. (Keyboard input is still not implemented for those models.) Only PMAG-AA (1280x1024x8) and PMAG-BA (1024x864x8), both using BT459 vdac, have been tested so far. Modifying the X11 routines so that several framebuffer windows now can be used simultaneously (if several graphics option cards are to be emulated concurrently). 20031104 DEC MIPSMATE 5100 (KN230) interrupts are shared between devices. I've added an ugly hack to allow that to work, which makes it possible to boot NetBSD into userland with serial console. 20031106 Removing the -S (symbol) option, as symbol files can now be given in any order together with other file names to be loaded. cookin tipped me about using (int64_t) (int32_t) casts instead of manually sign-extending values. Casting sometimes increases performance, sometimes decreases. It's tricky. Importing mips64emul into CVS. 20031107 Adding a generic ARC emulation mode. Increasing performance of the framebuffer by not updating it (or the XImage) if a write to the framebuffer contains exactly what is already in it. (This improves scrolling speed and initialization.) Adding initial MIPS16 support. Adding initial disk image support (-d command line option), but this will not be used until I get some kind of SCSI-controller emulation working. 20031108 Adding the first MIPS16 instructions: "move y,X", "ld y,D(x)", and "daddiu S,K" (but the last one doesn't work yet). Fixing the console environment variable for Enough of the 'asc' controller is now implemented to let NetBSD get past scsi disk detection when no disk images are used. DECstation machine type 2; both serial console and graphical console work now. Other X-windows bit-depths than 24 bits work now, but colors are still not correct in non-24 bit modes. Keypresses in X framebuffer windows are now translated into console keypresses. (Normal keys, but not cursor keys or other special keys.) 20031111 Adding support for X11 using non-24-bit output. 20031120 Adding X11 mouse event to emulated mouse event translation, but it's not tested yet. Trying to get more of the SCSI controller emulation to work. 20031124 Raw binaries can now be loaded into memory. 20031204 Adding srec binary support. 20031220 Adding some super-ugly arcbios emulation code. Making some progress on the SGI and ARC machine emulations. 20031222 SGI and ARC progress. Multiple CPUs are now added to the arcbios component tree (although NetBSD cannot actually use more than one). 20031228 Adding 'crime' and 'macepci' fake devices for SGI emulation. Finally implementing the cop0 'compare' register. Improvements to the ns16550 device, but it is still incomplete. SGI userland is now reached, but interaction is broken (due to the buggy ns16550). 20031229 Adding some more instructions: teq, dsllv Adding a Nintendo 64 emulation mode (skeleton). Adding R4300 and R12000 to the cpu list. 20031230 Adding bltzal, bltzall, bgezal, bgezall (not really tested yet). Fixing the 16550 serial controller device (by not supporting fifo, so in fact it emulates a 16450 instead). This causes NetBSD/sgimips to run nicely into userland, sysinst, and so on. Some ARC/RD94 interrupts seem to work ok now, but i/o interrupts are still not correctly implemented. NetBSD/arc userland is reached and can be interacted with, but there's no sysinst (?). 20040103 Trying to get some Irix stuff to work, but it's hard. Fixing some Cobalt/linux problems. 20040104 Adding a dummy 8250 device, so that Linux/sgimips can output console messages. Adding dmultu. (The same as dmult, so I'm not sure it's correct. Perhaps dmultu is correct and dmult is wrong...) Fixing a bug in unaligned load/stores of 64-bit values (a cast was needed). Linux/sgimips in 64-bit works a bit more than before. Adding simple (polled) input functionality to dev_zs. Making some progress on SGI-IP22 (IP32 still works best, though). Fixing the mc146818 clock device in ARC/NEC and SGI emulation modes, the year field was not correct. Adding a fake 'pref' instruction (lwc3). 20040106 Separating out memory.h from misc.h. Refactoring of a lot of small code fragments. The PCI bus device is now shared between Cobalt, SGI, and ARC. Support for RAM mirroring (dev_ram.c, not really tested yet). Ugly hack to select the largest of ELF string symbol tables, if there are more than one. Memory hole fix for ARCBIOS, and a fix for very large (>= 4GB) amounts of emulated RAM. TGA (DEC 21030) PCI graphics device. NetBSD/arc can boot with this card and use it as a framebuffer console. 20040107 Adding a fix (partly incorrect) to daddi, to allow Linux/sgimips to boot in 64-bit mode. 20040108 Fixing a sll/nop bug (rd==0 for nop, not sa==0 as before). 20040109 Trying to get an SGI-IP32 PROM image to boot. 20040110 Faking R10000 cache things. The PROM image boots, although it takes almost forever for it to realize that there is no keyboard. The 'gbe' SGI-IP32 graphics device works enough to display the Linux framebuffer penguin in the upper left corner :-) 20040111 -p and -P addresses can now be given as symbol names, not just numeric values. Experimenting with adding a PCIIDE (dev_wdc) controller to the Cobalt emulation. 20040120 Adding src/bintrans.c. No code yet, but this is a place for ideas to be written down. Increasing performance a little bit by inlining the check for interrupts (which occurs for every instruction). 20040124 Experimenting with pure userland (syscall) emulation. 20040127 Fixes for compiling under Solaris. 20040206 Some bintrans experiments. 20040209 Adding some simple Ultrix userland emulation syscalls. 20040211 Adding decprom_dump_txt_to_bin.c to the experiments/ dir. Adding a section to doc/ on how to use DECstation PROM dumps. Adding a hello world example to doc/ as well. 20040218 TURBOchannel slots that are empty now return a DBE exception, so that Ultrix and DECstation PROMs don't complain about broken TURBOchannel ROMs. Working some more on the machine-dependant interrupt stuff. 20040219 Trying out some Linux/DECstation kernels (semi-successfully). 20040222 YES! I finally found the bug that caused Linux/SGI-IP32 to only work on Alpha, not on 32-bit machines. It was a shift left, probably done using 6 bits on alpha, 5 bits on 32-bit machines. 20040223 Some minimal DEC KN5800 progress; Ultrix prints some boot messages, detects 16 XMI R3000 cpus, and get a NULL panic. It's all fake, though, the CPUs don't actually work. Still, better than nothing :-) 20040225 An Ultrix OSF1 kernel with a ramdisk now boots :-) (It was a problem with ultrixboot not giving the same arguments as NetBSD's boot program.) 20040225(later) Fixing a bug in the DECstation dc serial device; digits 0-9 were translated to numeric keypad 0-9, not the normal 0-9. (This caused Ultrix to print escape sequences instead of digits.) 20040226 Some progress on machine-dependant interrupt delivery for -D7 (Maxine) and -D4, and some more 'scc' serial controller featuers are implemented (but no interrupts/ dma/keyboard/mouse stuff yet). 20040228 Progress on the scc controller; -D4 works in both serial console mode and with keyboard (graphical console), but no mouse yet. 20040301 SGI mace interrupts are now done using the new machine- independant interrupt system. 20040303 Fixing an R5900 bug; the lowest 6 bits have special meaning for coprocessor functions, not just 5 bits as on non-R5900 CPUs. (This fixes a bug which caused NetBSD to crash.) 20040304 Adding enough (fake) DMA capabilities to the ioasic device to allow Ultrix to print boot messages in the -D3, -D4, and -D7 modes, and also print graphical console messages in -D4 and -D7 modes. -D11 (DEC5500) polled getchar added (to the 'ssc' device). Adding the 'madd' instruction (including R5900 weird stuff). 20040304(later) Playstation 2's GIF can now copy 640x16 pixel chunks, allowing NetBSD to scroll up the framebuffer. The cursor also works better now. Playstation 2 bootinfo RTC data should now be passed correctly to the running kernel. DECstation rtc year should be either 72 or 73, anything else will cause Ultrix to give a warning about invalid year. 20040306 Combining playstation2's dmac, interrupt, and timer devices into one (ps2_stuff). Adding some R5900 instructions: mfsa, mtsa, pmfhi, pmflo, por, lq, and sq. (Most of them are just guesses, though.) Implementing my own XImage putpixel routine, which can be inlined... significantly faster than normal XPutPixel. :-) 20040307 Implementing the basic functionality of a "PMAG-CA" pixelstamp accellerated framebuffer device. Works with NetBSD and Ultrix, but no cursor or color support. 20040308 PMAG-CA, -DA, and -FA pixelstamps seem to work now. Adding a hack to allow a pmax/mach kernel to be loaded (it's a COFF file with 0 (!) sections). Initial test of bt459 + framebuffer cursor support. 20040309 Fixes/updates of dev_dec5800 and dev_ssc (and dev_decxmi) allow a KN5800 Ultrix-OSF1-ramdisk kernel to boot all the way into userland and be interacted with. The bt459 cursor should now look semi-nice, but it is still a bit fake. 20040310 Moving the DEC CCA stuff from src/machine.c into a separate device file (devices/dev_deccca.c). An ugly hack added to allow some more OSF/1 kernels (almost a.out, but without many of the header fields) to load. 20040314 Adding PMAG-JA and PMAG-RO (1280x1024 x 8-bit) TURBOchannel graphics devices. They work in Ultrix, but only monochrome and no cursor, because there are no ramdacs or such yet. 20040315 Pixelstamp solid fill now supports colors other than just zero-fill. Adding a (new) regression test skeleton. 20040321 Some really minor updates. 20040323 Fixes to allow SGI-IP20 and IP22 to work a bit better (aliased memory), and adding "private" firmware-like vectors to arcbios emul. An IP22 Irix kernel gets far enough to print an assertion warning (and then double panics). :-) 20040324 Adding a generalization hack to the SCC serial controller to work with SGI-IP19 (in addition to DECstations). Adding the 'sdc1' instruction. Some progress on various SGI emulation modes. 20040325 Minor updates. 20040326 Fixed a 'madd' bug (r5900). NetBSD/playstation2 now reaches userland correctly. And a simple fix which allows NetBSD timer interrupts to be triggered; NetBSD uses T_MODE_CMPE (compare), while Linux uses _OVFE (overflow). 20040328 Linux on Playstation 2 boots a bit. The Playstation 2 graphics controller has been extended to work better with NetBSD, and to include some Linux support as well. Some interrupt handling enhancements on Playstation 2, needed for Linux' dma. 128-bit loads and stores (lq and sq) are allowed, although the top half of quadwords are not modified by other instructions. (Linux uses lq and sq.) Big-endian X Windows servers now display correct rgb color, not bgr as before. 20040330 Some minor updates to the documentation. 20040401 Adding a dummy ps2 OHCI device. 20040402 Progress on the asc SCSI controller. 20040406 Hack to allow ./configure, make to work on HP-UX B.11.00 on HPPA-RISC, gcc 3.3.2. (Does not work with HP's cc.) More progress on the asc SCSI controller. Fixing INQUIRY, adding READ_CAPACITY, adding READ. Works a bit with NetBSD and some (but not all) Ultrix kernels, on DECstation type 2. Adding WRITE, SYNCRONIZE_CACHE. Mounting disks works in NetBSD :-) It is a bit buggy, though. Or something else is buggy. 20040407 The bug is triggered by gunzip during NetBSD/pmax install. 20040408 Fixing a bug (non-nul-terminated string) which caused X11 cursors to not display on Solaris. Unnecessary X11 redraws are skipped (removes some weird delays that existed before), and cursors are redrawn on window exposure. (The cursor functionality has been moved from dev_fb.c to x11.c.) 20040411 Fixing the DC7085 device so that Ultrix doesn't behave weird if both tx and rx interrupts occur at the same time. More advancements on the asc SCSI controller. More disk image filename prefixes are now recognized; c (for CD-ROM, as before), d for disk, b for boot device, r for read-only, and 0-7 for scsi id. Mounting disks works in Ultrix. Installing to disk usually crashes for various reasons, but an OSF/1 install gets relatively far (similar to the NetBSD/pmax install). 20040412 Trying to find the bug. 20040415 Finally found and fixed the bug; SCSI reads and writes (actually, any data in or data out) can be split up into multiple DMA transfers. That stuff was only partially implemented, and the part that was implemented was buggy. It works now. NetBSD/pmax and Ultrix 4.3 seems to like the SCSI stuff enough to install almost all the way. 20040415 (more) Adding a hack which allows a host's cdrom device to be used as a cdrom device inside the emulator, eg /dev/cd0c. Making the cycle counter int64_t instead of long, as a 'long' overflows too easily on 32-bit machines. (The bug is still there, though.) I've now verified that a full NetBSD/pmax install can be done. If using a PMAG-AA graphics board, startx brings up X :-) mips64emul can be compiled inside NetBSD inside mips64emul, and it can run NetBSD in that environment. (I'm getting dizzy... :-) 20040417 Moving some coprocessor stuff from cpu.c to coproc.c. 20040424 Adding a BT455 vdac for PMAG-AA. Black and white are now rendered correctly in Xpmax. Adding colormap support to the BT459 device, for PMAG-BA. 20040425 Fixing a buffer length bug, which caused an Ultrix 4.5 install to bug out on an i386 host. 20040429 FPU experiments. 20040502 More FPU experiments. Speedup for exception debug messages: in quiet mode, debug messages were still evaluated, which took a relatively large amount of time. 20040503 Most FPU stuff fixed, but there is at least one known bug left; ps axu in NetBSD triggers it (ps loops forever). 20040504 A default install of Ultrix 4.5 succeeded! It boots up with a graphical login. Fixing the keyboard repetition bug (a lk201 "up" (release) scancode is now sent after every key). 20040505 Both CR and LF now produce the same lk201 scancode, so that pressing 'enter' works as expected in Ultrix. 20040506 Adding a vaddr to paddr translation cache, causing a speedup of perhaps 50% or more. 20040507 Fixing PMAG-BA color for Ultrix. (Ultrix relies on interrupts coming from the TURBOchannel slot to update the palette.) 20040508 Fixing cursor positioning for PMAG-BA. 20040511 Prints current nr of instructions per seconds, not only average, when using -N. 20040515 Some more bintrans experiments. 20040606 Adding ARCBIOS GetReadStatus() and Read(). Adding some instructions: tlt, tltu, tge, tgeu, tne. 20040607 Adding the dsub instruction. Some minimal progress on SGI-IP30 emulation. Applying a patch from Juli Mallett to src/file.c (I'm not sure yet if it breaks or fixes anything). Some minor fixes for SGI-IP22 (such as faked board revision numbers). 20040608 ll/sc should now fail if any unrelated load/store occurs. Minor changes to the configure script. Adding some ifdefs around code which is not often used (the mfhi/mflo delay, and the last_used TLB experimental code); this might cause a tiny speedup. 20040609 Minor fixes. 20040610 Various minor SGI fixes (64-bit ARCS stuff, progress on the CRIME/MACE interrupt system, and some other random things). 20040611 More crime/mace progress, and some more work on pckbc. KN5800 progress: adding a XMI->BI adapter device; a disk controller is detected (but it is just a dummy so far). 20040612 Adding "dev_unreadable", which simplifies making memory areas unreadable. (NetBSD on SGI-IP22 no longer detects non-existant hpc1 and hpc2 busses.) Implementing rudimentary support for IP22 "local0" and "local1" interrupts, and "mappable" local interrupts. Some progress on the WDSC SCSI controller on IP22, enough to let NetBSD get past the disk detection and enter userland! :-) The zs (zilog serial) device now works well enough to let NetBSD/sgimips be interacted with on IP22. :-) (Though it is very ugly and hardcoded.) 20040613 IP32 didn't work last night, because there were too many tick functions registered. That has been increased now. Trying out NetBSD/sgimips 2.0 beta kernels. There are some differences compared to 1.6.2, which I'm trying to solve. Interrupt fixes for IP32: _serial and _misc are different. Separation of IP22 (Full-house) and IP24 (Guiness). 20040614 Modifying the memory layout for IP20,22,24,26 (RAM is now offset by 128MB, leaving room for EISA registers and such), and moving around some code chunks. This is not well tested yet, but seems to work. Moving parts of the tiny translation cache, as suggested by Juli Mallett. It seems that the speedup isn't as apparent as it was a few weeks ago, though. :-( Speedups due to not translating addresses into symbol names unless the symbol name is actually printed. Added support for loading old big-endian (Irix) ECOFF kernels (0x60 0x01 as the first two bytes). 20040615 (late) Adding enough SGI IP20 (Indigo) support to let NetBSD 2.0 enter userland :-) No interrupt specifics are implemented yet, so it hangs while doing terminal output. 20040618 Experimenting with the WDSC SCSI controller for IP20,22,24. 20040620 Adding a program which converts SGI prom dumps from text capture to binary, and some hacks to try to make such an IP22 PROM to work better in the emulator. 20040621 Removing the Nintendo 64 emulation mode, as it is too uninteresting to support. Adding SCSI tape device support (read-only, so far). Fixing a bug which caused the cursor to be corrupted if new data was written to the framebuffer, but the cursor wasn't moved. 20040622(early) Finally! Making progress on the SCSI tape stuff; when going past the end of a file, automagically switch to the beginning of the next. 20040622(late) Trying to track down the last SCSI tape bugs. Removing _all_ dynamic binary translation code (bintrans), starting from scratch again. 20040623(early) Performing a general code cleanup (comments, fixing stuff that led to compiler warnings, ...). Disabling MIPS16 support by default, and making it a configure time option to enable it (--mips16). This gives a few percent speed increase overall. Increasing performance by assuming that instruction loads (reading from memory) will be at the same page as the last load. (Several percent speedup.) Moving the list of kernels that can be found on the net from README to doc/. 20040624 Finally! I found and fixed the bug which caused 'ps', 'top', 'xclock', and other programs in NetBSD/pmax to behave weird. Increasing performance by a few percent by running as many instructions in a row as possible, before checking for hardware ticks. When booting from SCSI tapes on DECstation, the bootstring now contains 'tz' instead of 'rz'. Adding a second ARC machine mode, "Acer PICA-61", -A2. Disabling the support for "instruction delays" by default (it has to be enabled manually in misc.h now, but is never used anywhere anyway). Other minor optimizations (moving around stuff in the cpu struct in misc.h, and caching cpu->pc in cpu.c). Separating the tiny translation cache into two, one for code and one for data. This gives a few percent speed increase. 20040625(early) I think now is a good time for a "feature freeze", to let the code stabilize and then make some kind of first release. 20040625(later) Adding a -v (verbose) command line option. If -v is not specified, the emulator goes into -q (quiet) mode just before it starts to execute MIPS code. 20040627 The configure script now adds -fomit-frame-pointer to the compile flags if the $CC seems to be able to handle that. Found and fixed a serious interrupt bug in BT459 (Ultrix' behaviour required a hack, which was incorrect), so performance for machines using the PMAG-BA framebuffer is now improved. For X11 bitdepths other than 8 or 24, a warning message is printed at startup. A number of other minor fixes, optimizations, updated comments and so on. Adding a BUGS file, a list of known bugs. Adding a minimal man page, doc/mips64emul.1. 20040628 Hacks for faking the existance of a second level cache (ARCBIOS and other places). An important fix for dc7085: tx interrupts should happen before rx interrupts, not the other way around as it was before. (This speeds up NetBSD boot on DECstation, and fixes a bug which Ultrix triggered on heavy keyboard input.) A couple of other minor fixes. Framebuffer fix: there was a bug which caused the rightmost/ bottom pixel to sometimes not be updated, when running in scaledown mode. This is now fixed. Adding a small program which removes "zero holes" from harddisk image files. 20040629 More minor fixes. 20040629(later) Adding -A3 (NEC RISCstation 2200) (this is similar to the 2250 model that NetBSD/arc can already boot all the way into userland and be interacted with), and -A4 (Deskstation Tyne). Some more minor fixes. 20040630 Adding support for 15 and 16 bits X11 framebuffers, and converting from XYPixmap to ZPixmap (this fixes the problem of updates appearing in "layers" on some X servers). The pixels in the mouse cursor (for BT459) are now colored as the emulated OS sets them, although no transparency masking is done on the edges of the cursor yet. (In plain English: the mouse cursor is no longer just a white solid square, you can actually see the mouse cursor image on the white square.) ============== RELEASE 0.1 ============== 20040701 The -j option now takes a name, the of the kernel as passed on to the bootloader. ("netbsd" is the default name.) Adding support to load bootstrap code directly from a disk image, for DECstation. Both NetBSD/pmax and Ultrix boot straight of a disk image now, with no need to supply a kernel filename on the command line. (Ultrix still needs -j vmunix, though, to boot from /vmunix instead of /netbsd.) 20040702 Minor bugfix (some new untested code for X11 keypresses was incorrect). 20040702(later) Adding an ugly hack for CDROMs in FreeBSD; if an fread() isn't done at a 2048-byte aligned offset, it will fail. The hack tries to read at 2048-byte aligned offsets and move around buffers to make it work. Adding video off (screen blanking) support to BT459. ============== RELEASE 0.1.1 ============== 20040702(later) Cleanup to remove compiler warnings (Compaq's cc, Solaris' cc, and gcc 3.3.3/3.3.4 in Linux), mostly by putting ULL on large numeric constants. Better support for scaledown of BT459 cursors, but still not color-averaging. Beginning the work on adding better memory latency support (instruction delays), enabled by the --delays configure option. 20040703 Modifications to the configure script so that a config.h file is created, containing things that were passed along as -Dxxx on each cc command line before. More work on instruction latency support; trying to separate the concepts of nr of cycles and nr of instructions. 20040704 Working on R2000/R3000 caches. Adding a '--caches' option to the configure script. Various small optimizations. R3000 caches finally work. (I know that there is at least one bug, regarding interrupt response.) 20040705 Working on the 'le' device, and on a generic (device independant) networking framework. le can transmit and receive packets, and the network framework fakes ARP responses from a fake gateway machine (at a fixed ip address, 10.0.0.254). Adding a '-c' command line option, which makes emulated_hz automatically adjust itself to the current number of emulated cycles per host CPU second (measured at regular intervals). 20040707 Removing the '-c' option again, and making it the default behaviour of the emulator to automatically adjust clock interrupts to runtime speed (as long as it is above 1 MHz). (This can be overridden by specifying a static clock rate with the -I option.) Updating the doc/ stuff a bit. Generalization of the DECstation bootblock loading, to work with Sprite/pmax. Lots of other minor modifications to make Sprite work, such as adding support for DECstation "jump table" PROM functions, in addition to the old callback functions. Sprite boots from a disk image, starting the kernel if the argument "-j vmsprite" is used, but it seems to not like the DBE exceptions caused by reading empty TURBOchannel slots. :-/ 20040708 Minor changes and perhaps some tiny speed improvements. The Lance chip is (apparently) supposed to set the length of received packets to len+4. (I've not found this in any documentation, but this is what NetBSD expects.) So now, ICMP echo replies work :-) UDP works in the outgoing direction, in the incoming direction, tcpdump can see the packets but they seem to be ignored anyway. (Weird.) Adding a separate virtual-address-to-host-page translation cache, 1-entry for loads, 1-entry for stores. (For now, it only works on R4000 as there are conflicts with cache usage on R3000). Changing the lower clock speed bound from 1 MHz to 1.5 MHz. 20040709 Incoming UDP checksums were wrong, but are now set to zero and NetBSD inside the emulator now accepts the packets (eg. nameserver responses). Host lookups and even tftp file transfers (using UDP) work now :-) Adding a section on Networking to the Technical documentation, and a preliminary NetBSD/pmax install instruction for network installs to the User documentation. Some updates to the man page. 20040709(later) Fix to the TURBOchannel code to allow Sprite to get past the card detection. Seems to still work with Ultrix and NetBSD. This also makes Linux/DECstation properly recognize both the Lance controller and the SCSI controller. Linux 2.4.26 from Debian boots nicely in framebuffer mode :-) 20040710 Some bits in the KN02 CSR that were supposed to be readonly weren't. That has been fixed, and this allows Linux/DECstation to get past SCSI detection. :-) Minor updates to the ASC controller, which makes Linux and OpenBSD/pmax like the controller enough to be able to access SCSI devices. OpenBSD/pmax boots from a disk image for the first time. :-) Linux detects SCSI disks, but I have no bootable Linux diskimage to test this with. Updating the doc/ to include instructions on how to install OpenBSD/pmax onto a disk image. Naively added a PMAGB-BA (1280x1024x8) in hopes that it would basically be a PMAG-BA (1024x864x8) in higher resolution, but it didn't work that way. I'll have to look into this later. Adding a -o option, useful for selecting '-s' (single user mode) during OpenBSD install and other things. After a lot of debugging, a serious bug related to the tiny cache was found; Linux just changes the ASID and returns when switching between processes in some occasions without actually _writing_ to the TLB, and I had forgotten to invalidate the tiny cache on such a change. 20040711(early) I've been trying to repeat the OpenBSD install from yesterday, but appart from the first initial install (which was successful), I've only been able to do one more. Several attempts have failed with a filesystem panic in the middle of install. I'm not sure why. 20040711 I found the "bug": wget downloaded the simpleroot28.fs.gz file as read-only, and gunzip preserved those flags. Thus, OpenBSD's installer crashed as it didn't get its writes through to the disk. Parts of the 1280x1024x8 PMAGB-BA graphics card has been implemented, it works (unaccelerated) in NetBSD and OpenBSD, but Ultrix does not seem to like it. Cleaned up the BT459 cursor offset stuff a bit. Trying to make the emulated mouse coordinates follow the host's mouse' coordinates (for lk201, DECstation), by "de-accelerating" the data sent to the emulated OS. 20040711(later) Fix so that Sprite detects the PMAG-BA correctly. Adding some stuff about NFS via UDP to the documentation. Fixed the 'update flag' for seconds, so now Sprite doesn't crash because of timer-related issues anymore. Fixing KN02 interrupt masks a bit more, to make Sprite not crash. Sprite now runs quite well. 20040712 Working on IP/UDP fragementation issues. Incoming UDP packets from the outside world can now be broken up into fragments for the guest OS. (This allows, for example, OpenBSD/pmax to be installed via nfs.) Outgoing fragmented packets are NOT yet handled. Linux doesn't use 64-bit file offsets by default, which is needed when using large disk images (more than 2GB), so the configure script has now been modified to add necessary compiler flags for Linux. 20040713 Trying out some minor optimizations. Refreshing the UDP implementation in src/net.c a little. 20040714 Updating the documentation a little on how to experiment with a Debian Linux install kernel for DECstations. A 'mini.iso' Linux image for DECstation has different fields at offsets 0x10 and 0x14, so I'm guessing that the first is the load address and the second is the initial PC value. Hopefully this doesn't break anything. Some initial TCP hacks, but not much is working yet. Some updates for IP30: The load/store 1-entry cache didn't work too well with IP30 memory, so it's only turned on for "MMU4K" now. (This needs to be fixed some better way.) Adding a hack which allows Linux/Octane to use ARC write() and getchild() on IP30. Linux uses ARCBIOS_SPB_SIGNATURE as a 64-bit field, it was 32-bit before. Making ugly hacks to the arcbios emulation to semi-support 64-bit equivalents of 32-bit structures. 20040716 Minor fixes to the configure script (and a few other places) to make the sources compile out-of-the-box on HP-UX (ia64 and HPPA), old OpenBSD/pmax (inside the emulator itself), and Tru64 (OSF/1) on Alpha. A couple of other minor fixes. 20040717 A little TCP progress; OpenBSD/pmax likes my SYN+ACK replies, and tries to send out data, but NetBSD/pmax just drops the SYN+ACK packets. Trial-and-error led me to change the 64-bit ARCS component struct again (Linux/IP30 likes it now). I'm not sure about all of the offsets yet, but some things seem to work. More 64-bit ARCS updates (memory descriptors etc). Better memory offset fix for IP30, similar to how I did it for IP22 etc. (Hopefully this doesn't break anything else.) Adding a MardiGras graphics controller skeleton for SGI-IP30 (dev_sgi_mardigras.c). Thanks to Stanislaw Skowronek for dual-licensing mgras.h. Finally rewrote get_symbol_name() to O(log n) instead of O(n) (Stanislaw's Linux kernel had so many symbols that tracing with the old get_symbol_name() was unbareably slow). Removing all of the experimental tlbmod tag optimization code (the 1-entry load/store cache), as it causes more trouble than the performance gain was worth. 20040718 The MardiGras device works well enough to let Linux draw the SGI logo and output text. A bunch of other minor changes. 20040719 Trying to move out all of the instruction_trace stuff from the main cpu loop (for two reasons: a little performance gain, and to make it easier to add a GUI later on). 20040720 Finally found and fixed the ethernet/tcp bug. The hardware address is comprised of 6 bytes, where the _first_ byte should have a zero as the lowest bit, not the last byte. (This causes NetBSD and Linux running in the emulator to accept my SYN+ACK packets.) Getting the first nameserver address from /etc/resolv.conf. (This is not used yet, but could be useful if/when I add internal DHCP support.) Working more on the TCP stuff; TCP seems to be almost working, the only immediate problem left is that the guest OS gets stuck in the closing and last-ack states, when it shouldn't. It is now possible to install NetBSD and OpenBSD via ftp. :-) 20040721 Trying to fix the last-ack bug, by sending an RST after the end of a connection. (Probably not a correct fix, but seems to work?) Adding a my_fseek() function, which works like fseek() but with off_t instead of long, so that large disk images can be used on systems where long is 32 bits. 20040722 Trying to fix some more TCP related bugs. 20040725 Changing the inlined asm statement in bintrans_alpha.c into a call to a hardcoded array of bytes that do the same thing (an instruction cache invalidation). This allows the same invalidation code to be used regardless of compiler. Some other minor changes. 20040726 Minor updates. The configure script is now more verbose. A Debian/IP22 Linux tftp boot kernel requires ARCS memory to be FreeMemory, not FreeContiguous. (This should still work with other SGI and ARC OSes.) Fix for ARCS write(), so it returns good write count and success result (0). Some hacks to the IP22 memory controller, to fake 72MB RAM in bank 0. The IP22 Debian kernel reaches userland (ramdisk) when run with -G24 -M72 -CR4400, if a special hack is done to the zs device. 20040730 Removing mgras.h, as I'm not sure a file dual-licensed this way would work. (Dual-licensing as two separate files would work though.) Preparing for the upcoming release (0.2). 20040801 Fixing the 512 vs 2048 cdrom sector size bug; I hadn't implemented the mode select SCSI command. (It still isn't really implemented.) A bug which crashes the emulator is triggered when run with new NetBSD 2.0_BETA snapshots on a Linux/i386 host. I'm not sure why. UDP packets sent to the gateway (at 10.0.0.254) are now forwarded to the machine that the host uses as its nameserver. Some other minor fixes. ============== RELEASE 0.2 ============== 20040803 A post-3.5 OpenBSD/sgimips kernel snapshot with ramdisk seems to boot fine in the emulator, all the way to userland, and can be interacted with. Adding a -y option, used to set how many (random) instructions to run from each CPU at max (useful for SMP instruction interleave experiments). Importing a 8x16 console font from FreeBSD (vt220l.816). Adding a skeleton for a 80x25 text console device (dev_vga), useful for some ARC modes. (Character output is possible, but no cursor yet.) Adding a dev_zero device (returns zeroes on read). OpenBSD/arc 2.3 can get all the way to userland with -A4 (if the wdc devices are commented out) but bugs out there, probably because of interrupt issues. Adding a -A5 ARC emulation mode (Microsoft-Jazz, "MIPS Magnum") which NetBSD seems to like. No interrupt specifics yet, so it hangs while waiting for SCSI. 20040804 Some dev_mp updates. The -y switch has to do with number of cycles, not number of instructions; variable names have been changed to reflect this. 20040805 Minor updates. Adding some more CPU types/names, but they are probably bogus. Adding a MeshCube emulation mode. Just a skeleton so far, but enough to let a Linux kernel print some boot messages. Adding the 'deret' instruction. 20040806 Adding include/impactsr-bsd.h (a newer version of what was in mgras.h before, and this time with only a BSD-style license), but it is not used yet. 20040810 Some Au1500 updates. 20040811 Adding the 'clz', 'clo', 'dclz', and 'dclo' special2 (MIPS32 and MIPS64) instructions. More Au1500 updates. 20040812 Using fseeko(), when it is available. Other minor updates. Adding a NetGear WG602 emulation mode skeleton (-g); after a lot of trial and error, a Linux kernel (WG602_V1715.img) gets all the way to userland, but hangs there. 20040818 Adding signal handlers to better cope with CTRL-Z and CTRL-C. Adding a simple interactive single-step debugger which is activated by CTRL-C. (Commands so far: continue, dump, help, itrace, quit, registers, step, trace, version) 20040818(later) Adding a 'tlbdump' debugger command, and some other minor fixes. 20040819 Minor updates. Adding an 'unassemble' debugger command. 20040822 Minor updates to the regression testing framework. 20040824 Minor updates based on feedback from Alec Voropay (configure script updates for Cygwin and documentation). 20040826 Minor updates. Adding a cursor to the VGA text console device. Changing all old 11:22:..55:66 ethernet macs to 10:20..60, still hardcoded though. 20040828 Minor updates. 20040829 mips64emul is 1 year old today :-) 20040901 tests/README now lists "all" MIPS opcodes. This list should be updated whenever a new opcode is implemented, or when a regression test is added. (A combination of instructions from the TX79 manual, the GNU assembler, and the MIPS64 manual). Hopefully I haven't missed too many. Adding a section on regression testing to doc/technical.html. 20040902 Finally beginning the work on separating out the stuff from main.c into a "struct emul". Very time-consuming. Some minor fixes for LL/SC on R10000. 20040905 Moving more stuff from main.c into struct emul. Unfortunately, it seems that this causes a slowdown of the emulator. Userland emulation is now only used if --userland is used when running configure. Modifying src/symbol.c to not use global variables. 20040906 Minor update. 20040914 Using $COPTIM when detecting which compiler flags to use in the configure script. (This makes sure that combinations of flags should work.) There'll probably be a 0.2.1 release some time soon, but I'll do some more clean-up first. Minor update to the detection of ECOFF files, but I don't like it; sometimes the endianness of the magic value seems to be swapped, but it doesn't have to do with endianness of the actual data? 20040916 Minor updates. Adding an Example section to the manpage, but as I'm not really familiar with manpage formatting, it will need to be rewritten later. 20040917 Finally making the coprocessor instructions disassemblable even when not running. Doing some testing for the 0.2.1 release. ============== RELEASE 0.2.1 ============== 20040923 Updating the documentation about how to (try to) install Debian GNU/Linux. 20040924 Some more updates to the documentation. 20040925 Adding overflow stuff to 'add' and 'sub'. 20040926 Minor updates: possibly a fix to 'sltiu' (the imm value should be treated as signed, and then converted to unsigned, according to the MIPS64 manual), and removing the 'last_was_rfe' stuff (again). OpenBSD/arc used speed-hack jumps with other deltas than just +/- 1 (it used -3 iirc), so the jump speedhack should now support any delta. Also adding bgtzl and blezl as possible instructions for the speed-hack jumps. (This needs to be tested more.) 20040928 Minor updates. Some ARC stuff ("arcdiag" runs now). cpu_register_dump() now also dumps coprocessor registers. 20040929 More ARC updates. Making the code look a tiny bit nicer than before. "arcdiag.ip22" works for -G22 (SGI-IP22). Apparently the overflow support in the 'add' instruction was incorrect, so I disabled it. 20041002 Trying to install Ultrix in the emulator, but the installer crashes; found (and fixed) the bug rather quickly: the "fix" I implemented a few days ago for the 'sub' instruction (according to the MIPS64 manual) caused the bug. 20041004 Changing the behaviour of the -j command line option. The default is now "" (or taken from the last filename given on the command line), not "netbsd". In practice, this doesn't change much, except that -j netbsd.pmax is no longer needed when installing NetBSD. Adding a COMPILE_DATE string to config.h. 20041007 Adding a NEC RISCserver 4200 model (-A6), and some more updates to the ARC component tree generator. 20041008 The 'll' instruction should be signed, not unsigned as before. This (and some other minor fixes) causes Irix on SGI-IP32 (O2) to actually boot far enough to print its first boot messages :) Working on some new dynamic bintrans code. Enough is now implemented so that the 'nop' instruction is translated and there is support for Alpha, i386 and UltraSparc backends, but performance is about 50% worse than when running without bintrans. (This is as expected, though.) 20041009 Minor updates to the documentation. Using mprotect() to make sure that the code created dynamically by the bintrans subsystem is allowed to be executed. (This affects newer OpenBSD systems, and possibly others.) The translated code chunks now only get one argument passed to them, the (struct cpu *) of the current cpu. 20041010 Hack to dev_le.c which makes Ultrix accept the initialization of the LANCE controller. (This goes against the LANCE documentation though.) In src/net.c, a fix for Ultrix (which seems to send larger ethernet packets than the actual TCP/IP contents). The hack to dev_le.c and this fix is enough to let Ultrix access the Internet. For DECstation, when booting without a disk image (or when "-O" is used on the command line), use "tftp" instead of "rzX" for the boot string. 20041011 Adding cache size variables to the emul struct, so that these can be set on a per-machine basis (or potentially manually on the command line). 20041012 Mach/PMAX now passes the LK201 keyboard self-test (although the keyboard ID is still bogus). 20041013 Minor updates. Hacks to the ASC SCSI controller for Mach/PMAX, hopefully this will not break support for other OSes. 20041014 Minor fix to src/emul.c for reading bootblocks at the end of a disk or cdrom image (thanks to Alexandru Lazar for making me aware of this). Adding "gets()" to src/dec_prom.c. Working a bit on ARC stuff. Importing pica.h from NetBSD. Minor updates to the ARC component tree for PICA-61. Adding a dev_jazz.c (mostly for PICA-61). Renaming dev_jazz.c into dev_pica.c. Working on PICA timer and interrupt specifics. 20041016 Adding some dummy entries to lk201.c to reduce debug output. Some bintrans updates (don't run in delay slots or nullified slots, read directly from host memory and not via memory_rw(), try mmap() before malloc() at startup, and many other minor updates). Adding bintrans_mips.c for 64-bit MIPS hosts, but it is not used yet. 20041017 Minor updates. 20041018 Update to dev_mc146818 to allow Mach to boot a bit further. The "hardware random" in dev_mp.c now returns up to 64 bits of random. 20041019 Minor updates to the way cache sizes are used throughout the code. Should be mostly ok for R[234]x00. src/file.c now loads files using NO_EXCEPTIONS. Whether this is good or bad, I'm not sure. 20041020 Adding a Linksys WRT54G emulation skeleton (-H). 20041021 Minor updates. R1[024]000 cache size bits in the config register should now be ok. Trying to make dev_asc.c work better with PICA. More work on PICA interrupts (but they are broken now). 20041022 Generalizing the dev_vga text console device so that it can be used in other resolutions than just 80x25. Works with OpenBSD/arc. emul->boot_string_argument is now empty by default (except for DECstation modes, where it is "-a"). Speedup of dev_ram by using mmap() instead of malloc(). Using mmap() in memory.c as well, which reduces memory usage when emulating large memory sizes if the memory isn't actually written to. 20041023 Minor updates. 20041024 Updates to the PC-style keyboard controller, used by PICA. Updates to the PICA (Jazz) interrupt system. Both NetBSD/arc and OpenBSD/arc now reach userland with PICA emulation, and can be interacted with (there are a few programs on the INSTALL kernel ramdisks). In the case of OpenBSD, a VGA text console and PC-style keyboard controller is used, NetBSD runs on serial console. Adding a framework for DMA transfer for the ASC SCSI controller. Implementing a R4030 DMA controller for PICA, enough to let OpenBSD/arc and NetBSD/arc be installed on an emulated Pica. :-) Updates to the documentation. 20041025 Working on ISA interrupts for PICA. Adding an Olivetti M700 emulation mode (-A7). Better separation of PICA and M700 stuff (which I accidentally mixed up before, I thought the M700 Linux kernel would also work on PICA because it almost booted). Writing a skeleton G364 framebuffer for M700, enough to show the Linux penguin and some text, although scrolling isn't correctly implemented yet. Adding a dummy SONIC (ethernet) device, dev_sn, for PICA. Fixing the passing of OSLOADOPTIONS for ARC, the default is now "-aN" which works fine with OpenBSD/arc and NetBSD/arc. 20041027 Minor updates. 20041029 Adding a Sony NeWS "newsmips" emulation mode skeleton (-f). Found and fixed a bug which prevented Linux/IP32 from running (the speed-hack-jump-optimization fix I made a few weeks ago was buggy). Adding the trunc.w.fmt and trunc.l.fmt instructions, although the are probably not really tested yet. Changes to how floating point values are handled in src/coproc.c, but right now it is probably very unstable. 20041101 I had accidentally removed the instructions on how to install Ultrix from doc/index.html. They are back now. Adding a -Z option, which makes it easier to run dual- or tripple-head with Ultrix. (Default nr of graphics cards without -X is 0, with -X is 1.) Minor update which makes it possible to switch to the left monitor when running tripple-head, not just right as before. When using more than one framebuffer window, and the host's mouse cursor is in a different window than the emulated mouse cursor, the emulated mouse will now try to move "very far", so that it in practice changes screen. Running Ultrix with dual- and tripple-head now feels really great. 20041101(later) OpenBSD/arc and Linux/Olivetti-M700 don't both work at the same time with the speed-hack stuff. So, from now on, you need to add -J for Linux, and add nothing for openbsd. 20041102 Minor update for OSF/1 V4.0 (include sys/time.h in src/net.c and add -D_POSIX_PII_SOCKET to the C compiler flags). 20041103 Minor updates for the release. For some reason, Mach/PMAX caused the emulator to bug out on SunOS/sparc64 (compiled in 64-bit mode); a minor update/hack to dev_asc fixed this. ============== RELEASE 0.2.2 ============== 20041103 Minor updates. 20041104 Minor updates. 20041105 Running with different framebuffer windows on different X11 displays works now (even with different bit depths and endiannesses on different displays). A new command line option (-z) adds DISPLAYs that should be used. Update regarding how DECstation BT459 cursors are used; transparency :-) and some other bug fixes. 20041106 More bt459 updates. The cursor color seems to be correct for NetBSD, OpenBSD, Ultrix, and Sprite. Some minor bintrans updates (redesigning some things). 20041107 More bintrans updates (probably broken for non-Alpha targets). Moving doc/mips64emul.1 to man/. 20041108 Some updates. 20041109 More updates. Bintrans experiments mostly. 20041110 Some minor bintrans updates. 20041111 Minor updates. 20041112 A little rewrite of the bintrans system (again :-), this time a lot more naïve and non-optimizing, in order to support delay slots in a much simpler way. Ultrix 4.5 boots into a usable desktop on my home machine in 3min 28sec, compared to 6-8 minutes without bintrans. 20041113 Some minor bintrans updates. 20041114 More bintrans updates. Ultrix now boots in exactly 3 minutes on my home machine. 20041115 More bintrans updates. 20041116 Bintrans updates. 20041117 Working on dev_dec_ioasic and related issues. Adding support for letting translated code access devices in some cases (such as framebuffers). 20041118 Moving some MIPS registers into Alpha registers, which gives a speed improvement. Beginning to write an i386 bintrans backend. Skeleton stuff works, lui, jr/jalr, addiu/daddiu/andi/ori/xori, j/jal, addu/daddu/subu/xor/or/nor/and. 20041119 dsubu/sll/srl/sra, rfe,mfc0,dmfc0, beq,bne, delayed branches. Some load/store (but not for bigendian emulation yet.) Time to reach Ultrix 4.5's graphical login on a 2.8 GHz Xeon host is now down to 20 seconds! Adding bgez, bltz, bgtz, and blez to the i386 backend. 20041120 Minor updates (bintrans related mostly). Time to reach Ultrix login on the Xeon is now 11 seconds. Adding 'mult', 'multu' and a some parts of mtc0 to the Alpha backend. The transparency updates to the X11 cursor support made the OpenBSD/arc cursor disappear; that has been fixed now. Unfortunately, something with Acer Pica emulation is broken when bintrans is enabled. 20041121 Making tlbwr, tlbwi, tlbp, tlbr callable directly from translated code. Adding sltiu, slti, slt, and sltu to the i386 backend. 20041122 More bintrans updates. With the Alpha backend, the status and entryhi registers can (in some cases) be written without exiting to the main loop. Ultrix boot time until a usable desktop is reached is about 1 min 35 seconds on the 533 MHz pca56. Adding srlv, srav, and sllv to the i386 backend. 20041123 Removing the special handling of high physical addresses for DECstation emulation from the main memory handling code, and replacing it with a mirror device instead. (This results in a tiny increase in performance, and cleaner code.) Various minor updates. 20041124 Ripping out _all_ bintrans load/store code, because I have a new idea I'd like to try out. A total rewrite of the load/store system. It works when emulating 32-bit MIPS, but not for 64-bit code yet. Some minor updates to the dev_fb, but no speed improvement. Making the 'le' ethernet device' SRAM work with bintrans. 20041125 Various updates. Adding a little "bootup logo" to the framebuffer. There is now one translate_address() for R3000-style MMUs, and one for the other types. (This gives a tiny speed improvement.) 20041126 Minor updates, bintrans. Fixing the bug which caused OpenBSD/arc (R4000) to bug out; it was introduced between the 7:th and 10:th of November when moving up the check for interrupts to above the code which runs bintrans code, in src/cpu.c. Adding movn and movz to the Alpha bintrans backend. 20041127 Various minor updates. 20041128 Making the R2000/R3000 caches work with bintrans, even in isolated mode. (Not true cache emulation, but it works with NetBSD/pmax, OpenBSD/pmax, and Ultrix.) Making the default cache size for R3000 4KB instr, 4 KB data; a real R3000 could have 64KB each, but emulated OSes run faster when they think the cache is smaller :-) Updates to the i386 backend: the nr of executed instructions is now placed in ebp at all times, and some support for mtc0 similar to how it is done in the Alpha backend has been added. A full NetBSD/pmax 1.6.2 install can now be done in 5 minutes 35 seconds, on a 2.8 GHz Xeon host (with -bD2 -M20). Adding mult and multu to the i386 bintrans backend. Reducing the number of malloc/free calls used by the diskimage subsystem. 20041129 Minor updates to the Alpha bintrans backend. 20041130 Trying to fix the bug which prevents Linux from working with bintrans. It _seems_ to work now. (Pages could in some cases be written to after they were translated, but that has been fixed now.) A couple of other minor fixes. Minor updates to the Alpha backend (directly using Alpha registers in some cases, instead of loading into temporaries). Updates to the i386 backend (special hacks for 32-bit MIPS emulation, which are fast on i386, for example only updating half of the pc register). 20041201 More updates to the i386 backend, similar to those yesterday. Preparing for release 0.2.3. Adding a generic load/store mechanism, which is used when the 32-bit optimized version cannot be used (for R4000 etc). ============== RELEASE 0.2.3 ============== 20041202 If ALWAYS_SIGNEXTEND_32 is defined in misc.h, and an incorrectly extended register is detected, the emulator now exits instead of continues. Removing the LAST_USED_TLB_EXPERIMENT stuff. Minor updates to work better with Windows NT's ARCINST.EXE; printing 0x9b via arcbios becomes ESC + '[', and the ARC memory descriptor stuff has been generalized a bit more. Adding arbios hacks for Open(), Seek(), GetRelativeTime(), and Read() to allow WinNT's SETUPLDR to read the filesystem on the diskimage used for booting. 20041203 Adding a terminal emulation layer which converts arcbios stdout writes to "VGA text console" cell characters. Seems to work with Windows NT and arcdiag. Adding a 8x8 font to dev_vga. Adding more ARC components to the component tree (for PICA emulation). 20041204 Minor updates. More updates to dev_vga. Adding a 8x10 font. Adding a hack so that the framebuffer logo is visible at startup with dev_vga. (It disappears at the first scroll.) A minor fix for a bug which was triggered when running dual- or tripple-head, on 2 or 3 actual X11 displays. 20041205 Fixing a bintrans bug. Some other minor updates (some of them bintrans related). 20041206 Moving the web page to http://gavare.se. Adding a hack for mmap() which supports anonymous mapping using /dev/zero, but not using MAP_ANON{,YMOUS}. Separating out opcodes.h, cop0.h, and cpu_types.h from misc.h. 20041207 Minor bintrans update. (In some cases, it isn't necessary to return to the main loop, when translating from a new page.) Some other minor i386 bintrans backend optimizations. And some other minor updates. i386 backend update: the lowest 32 bits of the pc register are now placed in an i386 register. 20041208 Adding GetConfigurationData() and some support for config data, to src/arcbios.c. Adding a bogus 0xbd SCSI command (used by Windows NT). It is not listed in http://www.danbbs.dk/~dino/SCSI/SCSI2-D.html. If the framebuffer cursor contains more than 1 color, then the host's X11 cursor disappears. (Nice for DECstation emulation with emulated X.) For ARC and SGI emulation, if an exception occurs before an exception handler is installed, the emulator now exits nicely (as suggested by Alec Voropay). A couple of minor updates to the ARCBIOS emulation subsystem. The single step debugger is now automatically entered when all CPUs have stopped running, unless there was a clean shutdown of some kind (PROM halt() call, or similar). Adding a -V option for starting up in a paused state, into the single-step debugger. Adding a note about 'mmon' to the documentation (http://www.brouhaha.com/~eric/software/mmon/). 20041209 Fixes to devices/console.c which makes cursor keys and such a bit more reliable. ARCBIOS hack/update which creates memory descriptors _after_ loading the executable. (Seems to work with OpenBSD/arc, NetBSD/arc, arcdiag, IRIX, NetBSD/sgimips, OpenBSD/sgi, and some Windows NT executables.) ARCBIOS support for cursor keys (ESC + '[' ==> 0x9b). A bintrans update (for 32-bit emulation) which speeds up jumps between pages, if code is already translated. Changing the default bintrans cache from 20 to 24 MB. 20041210 Optimizing unaligned load/stores a little bit in src/cpu.c. Omiting the check for nr of executed bintrans instructions on some forward jumps. Adding the 'syscall' and 'break' instructions to the bintrans backends. Allowing more bits of the status register to be written to from within inside translated code, on R3000. Getting rid of the final pixel when hiding the host's mouse cursor. store_buf() now copies data 8 or 4 bytes at a time, when possible. (This speeds up emulated ROM disk reads, etc.) Tiny bug fix: coprocessor unusable exceptions are now also generated (for coproc 1..3) even when in kernel mode, if the coprocessors are not enabled. This allows a Debian installation to proceed further than before. (It's still very unstable, though.) 20041212 Updating doc/index.html with better Debian installation instructions. If SLOWSERIALINTERRUPTS is defined at compile time, interrupts from the dc7085 device will not come as often as they normally do. This makes Debian seem more stable. Decreasing the bintrans cache to 20 MB again. Updating some files in preparation for a 0.2.4 release. 20041213 Updating the docs on how to install NetBSD 2.0/pmax, and also some updates to the section on installing Debian. 32-bit bintrans backend optimization: don't inline large chunks of code, such as general jumps. 20041214 Minor fix for coproc unusable for R4000 (it's the PC that, matters, not the KSU bits). Separating out the debugger from emul.c into debugger.c. Rewriting parts of the debugger. Removing the -U command line option, as it wasn't really useful. Also removing the -P option. Renaming all instances of dumppoint to breakpoint, as that is what it really is. When a breakpoint is reached, the single-step debugger is entered, instead of just turning on instruction trace. Adding a 'breakpoints' debugger command. Better fix for coproc unusable on R4000: the KSU bits matter, but the ERL and EXL bits override that. Fix which allows Debian to boot directly from a disk image (with DELO). (It reads multiple separate areas from disk.) Update to the SLOWSERIALINTERRUPTS stuff, making it even slower. Fixes based on feedback from Alec Voropay (-Q with ARC emulation skips the setup of arcbios data structures in memory, and no sign-extension _after_ writing a 32-bit value to a 64-bit coproc 0 register). Adding a 'devices' command to the debugger. The 'registers' and 'tlbdump' commands now take an optional argument (a cpu id). Adding rudimentary tab-completion and cursor key stuff to debugger_readline(). Adding some more debugger commands: 'bintrans' and 'machine'. 20041215 Adding a 'devstate' command; implementing a skeleton for a state function for the bt459 device. Implementing yet another variant of the SLOWSERIALINTERRUPTS stuff. Implementing more of the different exception offsets (taking CAUSE_IV and STATUS_BEV into account). hpc_bootinfo should now be correctly filled on big-endian hosts. Always shift left by 12, not by pageshift, to get physical addresses on MMU4K etc. (Thanks to Alec Voropay for noticing this.) 20041216 The KN02's CSR can now be read from bintranslated code. Adding a dummy dev_sgi_mec. 20041217 The default framebuffer and model settings for -F (hpcmips) should now be almost like Cassiopeia E-500. Changing -DSLOWSERIALINTERRUPTS into a command line option, -U. 20041218 Continuing a little bit on the mec controller. Removing lots of #include <math.h> that weren't really used. 20041219 Fixing stuff that broke because of the pageshift bugfix. Adding an argument to the s (step) debugger command, for doing more than 1 step at a time. ARCBIOS components representing disk images are now created to actually match the disk images in use, and some other arcbios-related updates; adding a dummy GetComponent(). Adding a 'lookup' command to the debugger, for symbol lookups. Adding a "NEC Express RISCserver" mode (NEC-R96, -A8). Adding a dummy ARCBIOS GetFileInformation(), GetTime(), and SetEnvironmentVariable(). 20041220 Improved command line editing (including command history) in the debugger. Separating some more .h files from each other, and fixing some Solaris compiler warnings. 20041221 Minor updates. 20041222 Minor updates; hpcmips (BE300, VR41xx) stuff. The 'register' debugger command is now 'reg', and it can be used to modify registers, not just read them. The syntax for hpcmips (-F) is now -F xx, where xx is a machine model identifier. (1 = BE300.) 20041223 Some really minor updates. 20041226 Minor updates to doc/index.html (NetBSD 1.6.2 -> 2.0, and some other rearrangements). Many updates to the debugger (better register manipulation, breakpoint manipulation, and other updates). Fix to dev_cons.c to allow the regression tests to work again. The configure script now tries to detect the presence of a MIPS cross compiler. (Used by "make regtest".) Regression tests are now run both with and without bintrans. 20041227 Some hacks to the VR41xx code to allow Linux for BE300 to get far enough to show the penguin on the framebuffer. 20041228 Merging dev_kn01_csr.c and dev_vdac.c into dev_kn01.c. 20041229 Various updates to the debugger (nicer tlb output and other things). Some floating point fixes in src/coproc.c (mov is not an arithmetic instruction), and in src/cpu.c (ldcX/sdcX in 32-bit mode uses register pairs). '-O' now also affects the bootstring for SGI and ARC emulation. Bintrans updates (slightly faster 32-bit load/store on alpha). Updates to the i386 backend too, but no real speed improvement. 20041230 Cleaning up parts of the 64-bit virtual-to-physical code for R10000, and per-machine default TLB entries can now be set for SGI and ARC machines. Fix: SGI-IP27 is ARC64, not ARCS. 20050101 Minor updates. 20050102 Minor updates. Fixing a 32-bit 'addu' bug in the bintrans backends. Allowing fast load/stores even in 64-bit bintrans mode, if the top 32 bits are either 0x00000000 or 0xffffffff (for Alpha only). Re-enabling ctc0/cfc0 (but what do they do?). Adding beql, bnel, blezl, and bgtzl to the Alpha backend. 20050103 Adding fast 32-bit load/store for 64-bit mode emulation to the i386 backend too (similar to the Alpha code). Not really tested yet, though. Adding an incomplete regression test case for lwl/lwr/ldl/ldr. Playing around with bintranslated lwl and lwr for Alpha. 20040104 Changing many occurances of pica to jazz. Various other updates. 20050105 Fixing some more bintrans bugs (both Alpha and i386). Unaligned stores that cause tlb refill exceptions should now cause TLBS exceptions, not TLBL. Adding experimental swl and swr to the Alpha backend. Adding lwl, lwr, swl, and swr to the i386 backend. 20050106 Adding another hpcmips model (Casio E-105, -F2), and doing some updates to the VR41xx code. NetBSD/hpcmips prints some boot messages. 20050108 Minor updates. 20050109 dev_dec5500_ioboard.c and dev_sgec.c => dev_kn220.c. dev_crime.c, _mace.c, and _macepci.c => dev_sgi_ip32.c. Also adding dev_sgi_mec, _ust, and _mte into dev_sgi_ip32.c. A slight license change. Still revised BSD-style, though. memory_v2p.c is now included separately for MMU10K and MMU8K. Fixing a NS16550 bug, triggered by NetBSD 2.0, but not 1.6.2. Refreshing the UltraSPARC bintrans backend skeleton. Merging dev_decbi, _deccca, and _decxmi into dev_dec5800.c. Sparc backend instructions done so far: mthi/mtlo/mfhi/mflo, lui, addu, daddu, subu, dsubu, and, or, nor, xor, sll, dsll, srl, and sra. Adding more sparc backend instructions: addiu, daddiu, xori, ori, andi, srlv, srav, sllv, slt, sltu, slti, sltiu. 20050110 Changing the default bintrans cache to 16 MB, and some other minor updates. Adding div and divu to the i386 backend (but not Alpha yet). More work on ARCBIOS emulation. Trying to find a bug which affects Linux on Playstation 2 in bintrans mode. 20050111 Moving around some Playstation 2 stuff, but I haven't found the bug yet. It is triggered by load/stores. More ARCBIOS updates, enough to let Windows NT partition disks in some rudimentary fashion. 20050112 Testing for release 0.2.4. Fixes to suppress compiler warnings. ============== RELEASE 0.2.4 ============== 20050113 Minor updates. 20050114 Fix to the Alpha bintrans backend to allow compilation with old versions of gcc (2.95.4). ============== RELEASE 0.2.4.1 ============== 20050115 Various updates and fixes: some IP32 stuff, the debugger, ns16550 loopback tx isn't transmitted out anymore, ... Removing old/broken R10000 cache hacks, which weren't really used. 20050116 Minor updates to the documentation on using PROM images. Adding ARCBIOS function 0x100 (used by IRIX when returning from main, but undocumented). MC146818 updates (mostly SGI-related). ARCS64 updates (testing with an OpenBSD snapshot in IP27 mode). This causes Linux/IP30 to not work. Maybe IP27 and IP30 differ, even though both are 64-bit? Removing some nonsensical ARCS64 code from machine.c. Better handling of 128MB and 512MB memory offsets used by various SGI models. Trying to revert the ARCS64 changes (OpenBSD/sgi does seem to be aware of 64-bit vs 32-bit data structures in _some_ places, but not all), to make Linux/IP30 work again. Adding "power off" capability to the RTC, as used on IP32 (and possibly IP30 and others). Some IP30 updates. 20050117 Debugger updates (symbolic register names instead of just rX, and using %08x instead of %016llx when emulating 32-bit CPUs in more places than before). Removing the dummy sgi_nasid and sgi_cpuinfo devices. Also using symbolic names for coprocessor 0 registers. Adding DEV_MP_MEMORY to dev_mp.c. Adding a 'put' command to the debugger. ARCBIOS function 0x100 used by IRIX seems to _NOT_ be a ReturnFromMain(), but something else undocumented. The count and compare registers are now 32-bit in all places, as they should be. (This causes, among other things, OpenBSD/sgi to not hang randomly in userspace anymore.) On breakpoints, the debugger is now entered _at_ the instruction at the breakpoint, not after it. Some cursor keys now work when inputed via X. Refreshing the MC146818 device a bit more. 20050118 Trying to add some support for less-than-4KB virtual pages, used by at least VR4131. Thanks to Alexander Yurchenko for noticing this. (I'm assuming for now that all R41xx work this way, which is not necessarily true.) It doesn't really work yet though. Renicing the "loading files" messages and other things displayed during startup. Changing the disassembly output of ori, xori, and andi to unsigned hex immediate, instead of decimal (as suggested by Alec Voropay). configure-script update for HP-UX, and switching from using inet_aton() to inet_pton() (as suggested by Nils Weller). Also adding -lnsl on Solaris, if required by inet_pton(). Lots of minor R4100-related updates. 20050119 Correcting the R4100 config register in src/coproc.c, and a minor update to dev_vr41xx. Finally began a redesign/remodelling/cleanup that I have had in mind for quite some time... moving many things that were in struct emul into a new struct machine. Userland emulation now works with bintrans. Refreshing the LANCE controller (dev_le.c). Fixing the LK201 keyboard id. 20050120 Continuing on the remodelling/cleanup. Fixing the SCSI bug (which was triggered sometimes by NetBSD 2.0/pmax on Linux/i386 hosts). Adding a speed-limit hack to the mc146818 device when running in DECstation mode (limiting to emulated 30 MHz clock, so that Ultrix doesn't freak out). Adding an ugly workaround for the floating-point bug which is triggered when running NetBSD/pmax 2.0 on an Alpha host. The count/compare interrupt will not be triggered now, if the compare register is left untouched. Many, many other fixes... 20050121 Continuing the remodelling/cleanup. (Mostly working on the network stack, and on moving towards multiple emulations with multiple machines per emulation.) Fixbug: not clearing lowest parts of lo0 and hi on tlbr (seems to increase performance when emulating Linux?). 20050122 Continuing the remodelling/cleanup. Linux on DECstation uses a non-used part of the RTC registers for the year value; this is supported now, so Linux thinks it is 2005 and not 2000. Began hacking on something to reply to Debian's DHCP requests, but it's not working yet. 20050123 Continuing the remodelling/cleanup. 20050124 Continuing the remodelling/cleanup. Converting the dev_vga charcell memory to support direct bintrans access (similar to how dev_fb works), and fixing a couple of bintrans bugs in the process. The emulator now compiles under OpenBSD/arc 2.3 without crashing (mostly due to the bintrans fixes, but also some minor updates to the configure script). 20050125 Continuing the remodelling/cleanup. The '-a' option was missing in the Hello World example in the documentation. (Thanks to Soohyun Cho for noticing this.) 20050126 Continuing the remodelling/cleanup. Moving around stuff in the header files, etc. Adding a '-K' command line option, which forces the debugger to be entered at the exit of a simulation, regardless of failure or success. Beginning to work on the config file parser. Splitting doc/index.html into experiments.html, guestoses.html, intro.html, and misc.html. Updating the man page and adding a skeleton section about the configure files to doc/misc.html. 20050127 Minor documentation updates. 20050128 Continuing the remodelling/cleanup, mostly working on the config file parser (adding a couple of machine words, enough to run simple emulations, and adding support for multi-line comments using tuborgs). Removing some command line options for the least working emulation modes (-e, -f, -g, -E, -H), adding new -E and -e options for selecting machine type. Moving global variables from src/x11.c into struct machine (a bit buggy, but it seems to almost work). 20050129 Removing the Playstation 2 mode (-B) and hpcmips modes (-F) from the command line as well. Changing the -T command line option from meaning "trace on bad address" to meaning "enter the single-step debugger on bad address". More updates to the configuration file parser (nested tuborg comments, more options, ...). Making -s a global setting, not just affecting one machine. Trying to fix the X11 event stuff... but it's so ugly that it must be rewritten later. Continuing the multi-emul cleanup. Bugfixes and other updates to dev_vga. 20050130 Continuing the remodelling/cleanup. Finally moving out the MIPS dependant stuff of the cpu struct into its own struct. Renaming cpu.c to cpu_mips.c, and cpu_common.c to cpu.c. Adding a dummy cpu_ppc.c. Removing the UltraSPARC bintrans backend. Many other minor updates. src/file.c should now be free from MIPS-dependancies. 20050131 Continuing a little bit more on src/file.c. PPC ELFs can now be loaded, it seems. Continuing on src/cpu_ppc.c. 'mips' is undefined by the configure script, if it is defined by default. (Fixes build on at least OpenBSD/arc and NetBSD/arc, where gcc defines 'mips'.) A couple of other minor fixes. Removing the "Changing framebuffer resolution" section from doc/misc.h (because it's buggy and not very useful anway). Adding a mystrtoull(), used on systems where there is no strtoull() in libc. Adding 'add_x11_display' to the configure file parser (corresponding to the -z command line option). Continuing the multi-emul machine cleanup. 20050201 Minor updates (man page, RELEASE, README). Continuing the cleanup. Adding a 'name' field to the emul struct, and adding a command to the debugger ("focus") to make it possible to switch focus to different machines (in different emuls). Beginning to work on the PPC disassembler etc. Hello World for linux-ppc64 can be disassembled :-) 20050202 Adding a hack for reading symbols from Microsoft's variant of COFF files. Adding a dummy cpu_sparc.c and include/cpu_sparc.h. Cleaning up more to support multiple cpu families. Various other minor updates. Fixing another old-gcc-on-Alpha problem. 20050203 Bintrans cache size is now variable, settable by a new configuration file option 'bintrans_size'. The debugger can now theoretically call disassembler functions for cpu families with non-fixed instruction word length. Working more on the mec controller. It now works well enough to let both NetBSD/sgimips and OpenBSD/sgi connect to the outside world using ftp :-) Continuing on the cleanup of the networking subsystem. 20050204 Continuing the cleanup. Working on a way to use separate xterms for serial ports and other console input, when emulating multiple machines (or one machine with multiple serial lines active). 20050205 Minor documentation updates. 20050206 Moving console.c from devices/ to src/, and continuing the work on using separate windows for each serial console. Trying to get OpenBSD/sgi to boot with root-on-nfs on an emulated NetBSD/pmax server, but no success in setting up the server yet. 20050207 Continuing on the console cleanup. Adding a 'start_paused' configuration file option, and a 'pause' command to the debugger. 20050208 Everything now builds with --withoutmips. Continuing on the documentation on how to run OpenBSD/sgi, but no actual success yet. sizeof => (int)sizeof in the configure script (as suggested by Nils Weller). 20050209 Adding a check for -lm to the configure script. Continuing on the cleanup: trying to make memory_rw non-MIPS dependant. Trying to make a better fix for the cdrom-block-size problems on FreeBSD. (It now works with a Windows NT 4.0 cdrom in my drive.) Began a clean-up of the userland subsystem. 20050210 Continuing the userland cleanup. IBM's Hello World example for Linux/PPC64 runs fine now. 20050211 Continuing the cleanup. Removing the --userland configure option (because support for userland is always included now). Working more on getting OpenBSD/sgi to boot with root on nfs. (Booting with the ramdisk kernel, and mounting root via nfs works, but not yet from the generic kernel.) Major update to the manpage. Removing the -G command line option (SGI modes). 20050212 Updating the documentation (experimental devices: dev_cons and dev_mp, better hello.c, and some other things). 20050213 Some minor fixes: documentation, 80 columns in some source files, better configure script options. Adding some more PPC instructions. Added a NOFPU flag to the MIPS cpu flags, so that executing FPU instructions on for example VR4xxx will fail (as suggested by Alexander Yurchenko). 20050214 Implementing more PPC instructions. Adding dev_pmppc. 20050215 Continuing the work on PPC emulation. Adding a (mostly non- working) NetBSD/powerpc userland mode, a (buggy) show_trace_tree thing (simliar to the MIPS version). 20050216 Continuing... 20050218 Continuing the clean-up. (Merging the devices and devstate debugger commands, more 80-column cleanup, some documentation updates, ...). 20050219 Removing the -D, -A, and -a command line options. Updating the documentation, in preparation for the next release. Adding interrupt stuff to dev_cons. Single-stepping now looks/works better with bintrans enabled. Beginning the first phase of release testing; various minor updates to make everything build cleanly on Solaris. 20050220 Continuing testing for the release... ============== RELEASE 0.3 ============== 20050221 Minor updates. Some more clean-up. Beginning on the new device registry stuff. 20050222 Continuing on the device stuff, and doing various other kinds of clean-up. Adding a dummy BeBox mode. Making the pc register common for all cpu families. Adding some more PPC instructions and fixing some bugs. 20050223 Continuing on the BeBox stuff, and adding more instructions. Adding an ns16550 to the VR4131 emulation (which is probably a close enough fake to the VR4131's SIU unit). 20050224 Minor updates. Adding dummy PReP, macppc, and DB64360 modes. Continuing on the device registry rewrite. 20050225 Continuing on the device stuff. 20050226 Continuing more on the device rewrite. Separating the "testmips" machine into testmips and baremips (and similarly with the ppc machine). Redesigning the device registry again :-) Adding a "device" command to the config file parser. Adding "device add" and "device remove" to the debugger. Removing pcidevs.h, because it was almost unused. 20050228 Correcting the Sprite disk image url in the documentation. 20050301 Adding an URISC cpu emulation mode (single-opcode machine). 20050303 Adding some files to the experiments directory (rssb_as.c, rssb_as.README, urisc_test.s). Continuing on the device stuff. 20050304 Minor documentation update. Also, the SPARC, PPC, and URISC modes are now enabled by default in the configure script. Some minor PPC updates (adding a VGA device to the bebox emulation mode). 20050305 Moving the static i386 bintrans runchunk code snippet (and the others) to be dynamically generated. (This allows the code to compile on i386 with old gcc.) Loading PPC64 ELFs now sets R2 to the TOC base. Changing the name of the emulator from mips64emul to GXemul. Splitting out the configuration file part of the documentation into its own file (configfiles.html). 20050306 Some really minor documentation updates. Adding a -D command line option (for "fully deterministic" behaviour). 20050308 Minor PPC updates. Adding a dummy OpenFirmware emulation layer. 20050309 Adding a hack for systems without inet_pton (such as Cygwin in Windows) as suggested by Soohyun Cho. (And updating the configure script too.) Adding a dummy HPPA cpu family. Some more OpenFirmware updates. Faster loading of badly aligned ELF regions. 20050311 Minor updates. Adding a dummy "NEC MobilePro 780" hpcmips machine mode; disabling direct bintrans access to framebuffers that are not 4K page aligned. 20050312 Adding an ugly KIU hack to the VR41xx device (which enables NetBSD/hpcmips MobilePro 780 keyboard input). 20050313 Adding a dummy "pcic" device (a pcmcia card controller). Adding a dummy Alpha cpu emulation mode. Fixing a strcmp length bug (thanks to Alexander Yurchenko for noticing the bug). 20050314 Some minor bintrans-related updates in preparation for a new bintrans subsystem: command line option -b now means "old bintrans", -B means "disable bintrans", and using no option at all selects "new bintrans". Better generation of MAC addresses when emulating multiple machines and/or NICs. Minor documentation updates (regarding configuration files). 20050315 Adding dummy standby, suspend, and hibernate MIPS opcodes. RTC interrupt hack for VR4121 (hpcmips). Enough of the pcic is now emulated to let NetBSD/hpcmips detect a PCMCIA harddisk controller card (but there is no support for ISA/PCMCIA interrupts yet). Adding preliminary instructions on how to install NetBSD/hpcmips. Continuing the attempt to get harddisks working with interrupts (pcic, wdc on hpcmips). 20050318 Minor updates. (Fixing disassembly of MIPS bgtz etc., continuing on the device cleanup, ...) 20050319 Minor updates. 20050320 Minor updates. 20050322 Various minor updates. 20050323 Some more minor updates. 20050328 VR41xx-related updates (keyboard stuff: the space key and shifted and ctrled keys are now working in userland (ie NetBSD/hpcmips' ramdisk installer). Also adding simple cursor key support to the VR41xx kiu. 20050329 Some progress on the wdc. Updating the documentation of how to (possibly) install NetBSD/hpcmips, once it is working. Adding delays before wdc interrupts; this allows NetBSD 2.0/hpcmips to be successfully installed! Mirroring physical addresses 0x8....... to 0x00000000 on hpcmips; this makes it possible to run X11 inside NetBSD/hpcmips :-) Updating the documentation regarding NetBSD/hpcmips. Fixing 16-bit vs 15-bit color in dev_fb. 20050330 Print a warning when the user attempts to load a gzipped file. (Thanks to Juan RP for making me aware of this "bug".) 20050331 Importing aic7xxx_reg.h from NetBSD. Adding a "-x" command line option, which forces xterms for each emulated serial port to always be opened. Adding a MobilePro 770 mode (same as 780, but different framebuffer address which allows bintrans = fast scrolling), and a MobilePro 800 (with 800x600 pixels framebuffer :-). 20050401 Minor updates. 20050402 Minor updates. (The standby and suspend instructions are bintransed as NOPs, and some minor documentation updates.) 20050403 Adding an Agenda VR3 mode, and playing around with a Linux kernel image, but not much success yet. Changing BIFB_D16_FFFF -> BIFB_D16_0000 for the hpcmips framebuffers, causing NetBSD to boot with correct colors. New syntax for loading raw files: loadaddr:skiplen: initialpc:filename. (This is necessary to boot the Linux VR3 kernels.) The Linux VR3 kernel boots in both serial console mode and using the framebuffer, but it panics relatively early. 20050404 Continuing on the AHC, and some other minor updates. 20050405 Adding a note in doc/experimental.html about "root1.2.6.cramfs" (thanks to Alec Voropay for noticing that it wasn't part of root1.2.6.kernel-8.00). Also adding a note about another cramfs image. -o options are now added to the command line passed to the Linux kernel, when emulating the VR3. Adding a MobilePro 880 mode, and a dummy IBM WorkPad Z50 mode. 20050406 Connecting the VR3 serial controller to irq 9 (Linux calls this irq 17), and some other interrupt-related cleanups. Reducing the memory overhead per bintranslated page. (Hopefully this makes things faster, or at least not slower...) 20050407 Some more cleanup regarding command line argument passing for the hpcmips modes. Playing with Linux kernels for MobilePro 770 and 800; they get as far as mounting a root filesystem, but then crash. Doing some testing for the next release. ============== RELEASE 0.3.1 ============== 20050408 Some minor updates to the wdc. Linux now doesn't complain anymore if a disk is non-present. 20050409 Various minor fixes (a bintrans bug, and some other things). The wdc seems to work with Playstation2 emulation, but there is a _long_ annoying delay when disks are detected. Fixing a really important bintrans bug (when devices and RAM are mixed within 4KB pages), which was triggered with NetBSD/playstation2 kernels. 20050410 Adding a dummy dev_ps2_ether (just so that NetBSD doesn't complain as much during bootup). Symbols starting with '$' are now ignored. Renaming dev_ps2_ohci.c to dev_ohci.c, etc. 20050411 Moving the bintrans-cache-isolation check from cpu_mips.c to cpu_mips_coproc.c. (I thought this would give a speedup, but it's not noticable.) Better playstation2 sbus interrupt code. Skip ahead many ticks if the count register is read manually. (This increases the speed of delay-loops that simply read the count register.) 20050412 Updates to the playstation2 timer/interrupt code. Some other minor updates. 20050413 NetBSD/cobalt runs from a disk image :-) including userland; updating the documentation on how to install NetBSD/cobalt using NetBSD/pmax (!). Some minor bintrans updates (no real speed improvement) and other minor updates (playstation2 now uses the -o options). 20050414 Adding a dummy x86 (and AMD64) mode. 20050415 Adding some (32-bit and 16-bit) x86 instructions. Adding some initial support for non-SCSI, non-IDE floppy images. (The x86 mode can boot from these, more or less.) Moving the devices/ and include/ directories to src/devices/ and src/include/, respectively. 20050416 Continuing on the x86 stuff. (Adding pc_bios.c and some simple support for software interrupts in 16-bit mode.) 20050417 Ripping out most of the x86 instruction decoding stuff, trying to rewrite it in a cleaner way. Disabling some of the least working CPU families in the configure script (sparc, x86, alpha, hppa), so that they are not enabled by default. 20050418 Trying to fix the bug which caused problems when turning on and off bintrans interactively, by flushing the bintrans cache whenever bintrans is manually (re)enabled. 20050419 Adding the 'lswi' ppc instruction. Minor updates to the x86 instruction decoding. 20050420 Renaming x86 register name indices from R_xx to X86_R_xx (this makes building on Tru64 nicer). 20050422 Adding a check for duplicate MIPS TLB entries on tlbwr/tlbwi. 20050427 Adding screenshots to guestoses.html. Some minor fixes and testing for the next release. ============== RELEASE 0.3.2 ============== 20050428 Disabling the "-fmove-all-movables" option in the configure script, because it causes the compile to fail on OpenBSD/sgi. 20050502 Minor updates. 20050503 Removing the WRT54G mode (it was bogus anyway), and adding a comment about Windows NT for MIPS in doc/experiments.html. Minor updates to the x86 instruction decoding. 20050504 Adding some more x86 instructions. Adding support for reading files from ISO9660 CDROMs (including gzipped files). It's an ugly hack, but it seems to work. Various other minor updates (dev_vga.c, pc_bios.c etc). 20050505 Some more x86-related updates. Beginning (what I hope will be) a major code cleanup phase. "bootris" (an x86 bootsector) runs :-) 20050506 Adding some more x86 instructions. 20050507 tmpnam => mkstemp. Working on a hack to allow VGA charcells to be shown even when not running with X11. Adding more x86 instructions. 20050508 x86 32-bit SIB addressing fix, and more instructions. 20050509 Adding more x86 instructions. 20050510 Minor documentation updates, and other updates (x86 stuff etc.) 20050511 More x86-related updates. 20050513 Various updates, mostly x86-related. (Trying to fix flag calculation, factoring out the ugly shift/rotate code, and some other things.) 20050514 Adding support for loading some old i386 a.out executables. Finally beginning the cleanup of machine/PROM/bios dependant info. Some minor documentation updates. Trying to clean up ARCBIOS stuff a little. 20050515 Trying to make it possible to actually use more than one disk type per machine (floppy, ide, scsi). Trying to clean up the kbd vs PROM console stuff. (For PC and ARC emulation modes, mostly.) Beginning to add an 8259 interrupt controller, and connecting it to the x86 emulation. 20050516 The first x86 interrupts seem to work (keyboard stuff). Adding a 8253/8254 programmable interval timer skeleton. FreeDOS now reaches a command prompt and can be interacted with. 20050517 After some bugfixes, MS-DOS also (sometimes) reaches a command prompt now. Trying to fix the pckbc to work with MS-DOS' keyb.com, but no success yet. 20050518 Adding a simple 32-bit x86 MMU skeleton. 20050519 Some more work on the x86 stuff. (Beginning the work on paging, and various other fixes). 20050520 More updates. Working on dev_vga (4-bit graphics modes), adding 40 columns support to the PC bios emulation. Trying to add support for resizing windows when switching between graphics modes. 20050521 Many more x86-related updates. 20050522 Correcting the initial stack pointer's sign-extension for ARCBIOS emulation (thanks to Alec Voropay for noticing the error). Continuing on the cleanup (ARCBIOS etc). dev_vga updates. 20050523 More x86 updates: trying to add some support for protected mode interrupts (via gate descriptors) and many other fixes. More ARCBIOS cleanup. Adding a device flag which indicates that reads cause no side-effects. (Useful for the "dump" command in the debugger, and other things.) Adding support for directly starting up x86 ELFs, skipping the bootloader stage. (Most ELFs, however, are not suitable for this.) 20050524 Adding simple 32-bit x86 TSS task switching, but no privilege level support yet. More work on dev_vga. A small "Copper bars" demo works. :-) Adding support for Trap Flag (single-step exceptions), at least in real mode, and various other x86-related fixes. 20050525 Adding a new disk image prefix (gH;S;) which can be used to override the default nr of heads and sectors per track. 20050527 Various bug fixes, more work on the x86 mode (stack change on interrupts between different priv.levels), and some minor documentation updates. 20050528 Various fixes (x86 stuff). 20050529 More x86 fixes. An OpenBSD/i386 bootfloppy reaches userland and can be interacted with (although there are problems with key repetition). NetBSD/i386 triggers a serious CISC-related problem: instruction fetches across page boundaries, where the later part isn't actually part of the instruction. 20050530 Various minor updates. (Documentation updates, etc.) 20050531 Adding some experimental code (experiments/new_test_*) which could be useful for dynamic (but not binary) translation in the future. 20050602 Adding a dummy ARM skeleton. Fixing the pckbc key repetition problem (by adding release scancodes for all keypresses). 20050603 Minor updates for the next release. 20050604 Release testing. Minor updates. ============== RELEASE 0.3.3 ============== 20050604 There'll probably be a 0.3.3.1 release soon, with some very very tiny updates. ============== RELEASE 0.3.3.1 ============== 20050609 Adding simple MIPS IPIs (to dev_mp). 20050611 Adding an ugly hack to track down low-reference bugs (define TRACE_NULL_CRASHES, or configure --tracenull). Other minor updates. 20050612 Adding a dummy evbmips mode. ============== RELEASE 0.3.3.2 ============== 20050617 Experimenting some more with netbooting OpenBSD/sgi. Adding a hack which allows emulated ethernet networks to be distributed across multiple emulator processes. 20050618 Minor updates (documentation, dummy YAMON emulation, etc). 20050620 strcpy/strcat -> strlcpy/strlcat updates. Some more progress on evbmips (Malta). 20050621 Adding a section to doc/configfiles.html about ethernet emulation across multiple hosts. Beginning the work on the ARM translation engine (using the dynamic-but-not-binary translation method). Fixing a bintrans bug: 0x9fc00000 should always be treated as PROM area, just as 0xbfc00000 is. Minor progress on Malta emulation (the PCI-ISA bus). 20050622 NetBSD/evbmips can now be installed (using another emulated machine) and run (including userland and so on). :-) Spliting up the bintrans haddr_entry field into two (one for read, one for write). Probably not much of a speed increase, though. Updating some NetBSD 2.0 -> 2.0.2 in the documentation. 20050623 Minor updates (documentation, the TODO file, etc). gzipped kernels are now always automagically gunzipped when loaded. 20050624 Adding a dummy Playstation Portable (PSP) mode, just barely enough to run Hello World (in weird colors :-). Removing the -b command line option; old bintrans is enabled by default instead. It makes more sense. Trying to finally fix the non-working performance measurement thing (instr/second etc). 20050625 Continuing on the essential basics for ARM emulation. Two instructions seem to work, a branch and a simple "mov". (The mov arguments are not correct yet.) Performance is definitely reasonable. Various other minor updates. Adding the ARM "bl" instruction. Adding support for combining multiple ARM instructions into one function call. ("mov" + "mov" is the only one implemented so far, but it seems to work.) Cleaning up some IP32 interrupt things (crime/mace); disabling the PS/2 keyboard controller on IP32, so that NetBSD/sgimips boots into userland again. 20050626 Finally! NetBSD/sgimips netboots. Adding instructions to doc/guestoses.html on how to set up an nfs server etc. Various other minor fixes. Playstation Portable ".pbp" files can now be used directly. (The ELF part of the .pbp is extracted transparently.) Converting some sprintf -> snprintf. Adding some more instructions to the ARM disassembler. 20050627 More ARM updates. Adding some simple ldr(b), str(b), cmps, and conditional branch instructions, enough to run a simple Hello World program. All ARM instructions are now inlined/generated for all possible condition codes. Adding add and sub, and more load/store instructions. Removing dummy files: cpu_alpha.c, cpu_hppa.c, and cpu_sparc.c. Some minor documentation updates; preparing for a 0.3.4 release. Updating some URLs. ============== RELEASE 0.3.4 ============== 20050628 Continuing the work on the ARM translation engine. end_of_page works. Experimenting with load/store translation caches (virtual -> physical -> host). 20050629 More ARM stuff (memory access translation cache, mostly). This might break a lot of stuff elsewhere, probably some MIPS- related translation things. 20050630 Many load/stores are now automatically generated and included into cpu_arm_instr.c; 1024 functions in total (!). Fixes based on feedback from Alec Voropay: only print 8 hex digits instead of 16 in some cases when emulating 32-bit machines; similar 8 vs 16 digit fix for breakpoint addresses; 4Kc has 16 TLB entries, not 48; the MIPS config select1 register is now printed with "reg ,0". Also changing many other occurances of 16 vs 8 digit output. Adding cache associativity fields to mips_cpu_types.h; updating some other cache fields; making the output of mips_cpu_dumpinfo() look nicer. Generalizing the bintrans stuff for device accesses to also work with the new translation system. (This might also break some MIPS things.) Adding multi-load/store instructions to the ARM disassembler and the translator, and some optimizations of various kinds. 20050701 Adding a simple dev_disk (it can read/write sectors from disk images). 20050712 Adding dev_ether (a simple ethernet send/receive device). Debugger command "ninstrs" for toggling show_nr_of_instructions during runtime. Removing the framebuffer logo. 20050713 Continuing on dev_ether. Adding a dummy cpu_alpha (again). 20050714 More work on cpu_alpha. 20050715 More work on cpu_alpha. Many instructions work, enough to run a simple framebuffer fill test (similar to the ARM test). 20050716 More Alpha stuff. 20050717 Minor updates (Alpha stuff). 20050718 Minor updates (Alpha stuff). 20050719 Generalizing some Alpha instructions. 20050720 More Alpha-related updates. 20050721 Continuing on cpu_alpha. Importing rpb.h from NetBSD/alpha. 20050722 Alpha-related updates: userland stuff (Hello World using write() compiled statically for FreeBSD/Alpha runs fine), and more instructions are now implemented. 20050723 Fixing ldq_u and stq_u. Adding more instructions (conditional moves, masks, extracts, shifts). 20050724 More FreeBSD/Alpha userland stuff, and adding some more instructions (inserts). 20050725 Continuing on the Alpha stuff. (Adding dummy ldt/stt.) Adding a -A command line option to turn off alignment checks in some cases (for translated code). Trying to remove the old bintrans code which updated the pc and nr_of_executed_instructions for every instruction. 20050726 Making another attempt att removing the pc/nr of instructions code. This time it worked, huge performance increase for artificial test code, but performance loss for real-world code :-( so I'm scrapping that code for now. Tiny performance increase on Alpha (by using ret instead of jmp, to play nice with the Alpha's branch prediction) for the old MIPS bintrans backend. 20050727 Various minor fixes and cleanups. 20050728 Switching from a 2-level virtual to host/physical translation system for ARM emulation, to a 1-level translation. Trying to switch from 2-level to 1-level for the MIPS bintrans system as well (Alpha only, so far), but there is at least one problem: caches and/or how they work with device mappings. 20050730 Doing the 2-level to 1-level conversion for the i386 backend. The cache/device bug is still there for R2K/3K :( Various other minor updates (Malta etc). The mc146818 clock now updates the UIP bit in a way which works better with Linux for at least sgimips and Malta emulation. Beginning the work on refactoring the dyntrans system. 20050731 Continuing the dyntrans refactoring. Fixing a small but serious host alignment bug in memory_rw. Adding support for big-endian load/stores to the i386 bintrans backend. Another minor i386 bintrans backend update: stores from the zero register are now one (or two) loads shorter. The slt and sltu instructions were incorrectly implemented for the i386 backend; only using them for 32-bit mode for now. 20050801 Continuing the dyntrans refactoring. Cleanup of the ns16550 serial controller (removing unnecessary code). Bugfix (memory corruption bug) in dev_gt, and a patch/hack from Alec Voropay for Linux/Malta. 20050802 More cleanup/refactoring of the dyntrans subsystem: adding phys_page pointers to the lookup tables, for quick jumps between translated pages. Better fix for the ns16550 device (but still no real FIFO functionality). Converting cpu_ppc to the new dyntrans system. This means that I will have to start from scratch with implementing each instruction, and figure out how to implement dual 64/32-bit modes etc. Removing the URISC CPU family, because it was useless. 20050803 When selecting a machine type, the main type can now be omitted if the subtype name is unique. (I.e. -E can be omitted.) Fixing a dyntrans/device update bug. (Writes to offset 0 of a device could sometimes go unnoticed.) Adding an experimental "instruction combination" hack for ARM for memset-like byte fill loops. 20050804 Minor progress on cpu_alpha and related things. Finally fixing the MIPS dmult/dmultu bugs. Fixing some minor TODOs. 20050805 Generalizing the 8259 PIC. It now also works with Cobalt and evbmips emulation, in addition to the x86 hack. Finally converting the ns16550 device to use devinit. Continuing the work on the dyntrans system. Thinking about how to add breakpoints. 20050806 More dyntrans updates. Breakpoints seem to work now. 20050807 Minor updates: cpu_alpha and related things; removing dev_malta (as it isn't used any more). Dyntrans: working on general "show trace tree" support. The trace tree stuff now works with both the old MIPS code and with newer dyntrans modes. :) Continuing on Alpha-related stuff (trying to get *BSD to boot a bit further, adding more instructions, etc). 20050808 Adding a dummy IA64 cpu family, and continuing the refactoring of the dyntrans system. Removing the regression test stuff, because it was more or less useless. Adding loadlinked/storeconditional type instructions to the Alpha emulation. (Needed for Linux/alpha. Not very well tested yet.) 20050809 The function call trace tree now prints a per-function nr of arguments. (Semi-meaningless, since that data isn't read yet from the ELFs; some hardcoded symbols such as memcpy() and strlen() work fine, though.) More dyntrans refactoring; taking out more of the things that are common to all cpu families. 20050810 Working on adding support for "dual mode" for PPC dyntrans (i.e. both 64-bit and 32-bit modes). (Re)adding some simple PPC instructions. 20050811 Adding a dummy M68K cpu family. The dyntrans system isn't ready for variable-length ISAs yet, so it's completely bogus so far. Re-adding more PPC instructions. Adding a hack to src/file.c which allows OpenBSD/mac68k a.out kernels to be loaded. Beginning to add PPC loads/stores. So far they only work in 32-bit mode. 20050812 The configure file option "add_remote" now accepts symbolic host names, in addition to numeric IPv4 addresses. Re-adding more PPC instructions. 20050814 Continuing to port back more PPC instructions. Found and fixed the cache/device write-update bug for 32-bit MIPS bintrans. :-) Triggered a really weird and annoying bug in Compaq's C compiler; ccc sometimes outputs code which loads from an address _before_ checking whether the pointer was NULL or not. (I'm not sure how to handle this problem.) 20050815 Removing all of the old x86 instruction execution code; adding a new (dummy) dyntrans module for x86. Taking the first steps to extend the dyntrans system to support variable-length instructions. Slowly preparing for the next release. 20050816 Adding a dummy SPARC cpu module. Minor updates (documentation etc) for the release. ============== RELEASE 0.3.5 ============== 20050816 Some success in decoding the way the SGI O2 PROM draws graphics during bootup; lines/rectangles and bitmaps work, enough to show the bootlogo etc. :-) Adding more PPC instructions, and (dummy) BAT registers. 20050817 Updating the pckbc to support scancode type 3 keyboards (required in order to interact with the SGI O2 PROM). Adding more PPC instructions. 20050818 Adding more ARM instructions; general register forms. Importing armreg.h from NetBSD (ARM cpu ids). Adding a (dummy) CATS machine mode (using SA110 as the default CPU). Continuing on general dyntrans related stuff. 20050819 Register forms for ARM load/stores. Gaah! The Compaq C Compiler bug is triggered for ARM loads as well, not just PPC :-( Adding full support for ARM PC-relative load/stores, and load/ stores where the PC register is the destination register. Adding support for ARM a.out binaries. 20050820 Continuing to add more ARM instructions, and correcting some bugs. Continuing on CATS emulation. More work on the PPC stuff. 20050821 Minor PPC and ARM updates. Adding more machine types. 20050822 All ARM "data processing instructions" are now generated automatically. 20050824 Beginning the work on the ARM system control coprocessor. Adding support for ARM halfword load/stores, and signed loads. 20050825 Fixing an important bug related to the ARM condition codes. OpenBSD/zaurus and NetBSD/netwinder now print some boot messages. :) Adding a dummy SH (Hitachi SuperH) cpu family. Beginning to add some ARM virtual address translation. MIPS bugfixes: unaligned PC now cause an ADEL exception (at least for non-bintrans execution), and ADEL/ADES (not TLBL/TLBS) are used if userland tries to access kernel space. (Thanks to Joshua Wise for making me aware of these bugs.) 20050827 More work on the ARM emulation, and various other updates. 20050828 More ARM updates. Finally taking the time to work on translation invalidation (i.e. invalidating translated code mappings when memory is written to). Hopefully this doesn't break anything. 20050829 Moving CPU related files from src/ to a new subdir, src/cpus/. Moving PROM emulation stuff from src/ to src/promemul/. Better debug instruction trace for ARM loads and stores. 20050830 Various ARM updates (correcting CMP flag calculation, etc). 20050831 PPC instruction updates. (Flag fixes, etc.) 20050901 Various minor PPC and ARM instruction emulation updates. Minor OpenFirmware emulation updates. 20050903 Adding support for adding arbitrary ARM coprocessors (with the i80321 I/O coprocessor as a first test). Various other ARM and PPC updates. 20050904 Adding some SHcompact disassembly routines. 20050907 (Re)adding a dummy HPPA CPU module, and a dummy i960 module. 20050908 Began hacking on some Apple Partition Table support. 20050909 Adding support for loading Mach-O (Darwin PPC) binaries. 20050910 Fixing an ARM bug (Carry flag was incorrectly updated for some data processing instructions); OpenBSD/cats and NetBSD/ netwinder get quite a bit further now. Applying a patch to dev_wdc, and a one-liner to dev_pcic, to make them work better when emulating new versions of OpenBSD. (Thanks to Alexander Yurchenko for the patches.) Also doing some other minor updates to dev_wdc. (Some cleanup, and finally converting to devinit, etc.) 20050912 IRIX doesn't have u_int64_t by default (noticed by Andreas <avr@gnulinux.nl>); configure updated to reflect this. Working on ARM register bank switching, CPSR vs SPSR issues, and beginning the work on interrupt/exception support. 20050913 Various minor ARM updates (speeding up load/store multiple, and fixing a ROR bug in R(); NetBSD/cats now boots as far as OpenBSD/cats). 20050917 Adding a dummy Atmel AVR (8-bit) cpu family skeleton. 20050918 Various minor updates. 20050919 Symbols are now loaded from Mach-O executables. Continuing the work on adding ARM exception support. 20050920 More work on ARM stuff: OpenBSD/cats and NetBSD/cats reach userland! :-) 20050921 Some more progress on ARM interrupt specifics. 20050923 Fixing linesize for VR4121 (patch by Yurchenko). Also fixing linesizes/cachesizes for some other VR4xxx. Adding a dummy Acer Labs M1543 PCI-ISA bridge (for CATS) and a dummy Symphony Labs 83C553 bridge (for Netwinder), usable by dev_footbridge. 20050924 Some PPC progress. 20050925 More PPC progress. 20050926 PPC progress (fixing some bugs etc); Darwin's kernel gets slightly further than before. 20050928 Various updates: footbridge/ISA/pciide stuff, and finally fixing the VGA text scroll-by-changing-the-base-offset bug. 20050930 Adding a dummy S3 ViRGE pci card for CATS emulation, which both NetBSD and OpenBSD detects as VGA. Continuing on Footbridge (timers, ISA interrupt stuff). 20051001 Continuing... there are still bugs, probably interrupt- related. 20051002 More work on the Footbridge (interrupt stuff). 20051003 Various minor updates. (Trying to find the bug(s).) 20051004 Continuing on the ARM stuff. 20051005 More ARM-related fixes. 20051007 FINALLY! Found and fixed 2 ARM bugs: 1 memory related, and the other was because of an error in the ARM manual (load multiple with the S-bit set should _NOT_ load usermode registers, as the manual says, but it should load saved registers, which may or may not happen to be usermode registers). NetBSD/cats and OpenBSD/cats seem to install fine now :-) except for a minor bug at the end of the OpenBSD/cats install. Updating the documentation, preparing for the next release. 20051008 Continuing with release testing and cleanup. ============== RELEASE 0.3.6 ============== 20051008 The bug was not because of faulty ARM documentation after all, but it was related to those parts of the code. Fixing the RTC (dev_mc146818) to work with CATS. 20051009 Rewriting the R() function; now there are 8192 automatically generated smaller functions doing the same thing, but hopefully faster. This also fixes some bugs which were triggered when trying to compile GXemul inside itself. :-) Adding a dummy dev_lpt. 20051010 Small hack to not update virtual translation tables if memory accesses are done with the NO_EXCEPTION flag; a time reduction of almost a factor 2 for a full NetBSD/cats install. :-) 20051011 Passing -A as the default boot arg for CATS (works fine with OpenBSD/cats). ============== RELEASE 0.3.6.1 ============== 20051012 Fixing the VGA cursor offset bug, and speeding up framebuffer redraws if character cells contain the same thing as during the last redraw. 20051013 Adding a slow strd ARM instruction hack. 20051017 Minor updates: Adding a dummy i80321 Verde controller (for XScale emulation), fixing the disassembly of the ARM "ldrd" instruction, adding "support" for less-than-4KB pages for ARM (by not adding them to translation tables). 20051020 Continuing on some HPCarm stuff. A NetBSD/hpcarm kernel prints some boot messages on an emulated Jornada 720. Making dev_ram work better with dyntrans (speeds up some things quite a bit). 20051021 Automatically generating some of the most common ARM load/store multiple instructions. 20051022 Better statistics gathering for the ARM load/store multiple. Various other dyntrans and device updates. 20051023 Various minor updates. 20051024 Continuing; minor device and dyntrans fine-tuning. Adding the first "reasonable" instruction combination hacks for ARM (the cores of NetBSD/cats' memset and memcpy). 20051025 Fixing a dyntrans-related bug in dev_vga. Also changing the dyntrans low/high access notification to only be updated on writes, not reads. Hopefully it will be enough. (dev_vga in charcell mode now seems to work correctly with both reads and writes.) Experimenting with gathering dyntrans statistics (which parts of emulated RAM that are actually executed), and adding instruction combination hacks for cache cleaning and a part of NetBSD's scanc() function. 20051026 Adding a bitmap for ARM emulation which indicates if a page is (specifically) user accessible; loads and stores with the t- flag set can now use the translation arrays, which results in a measurable speedup. 20051027 Dyntrans updates; adding an extra bitmap array for 32-bit emulation modes, speeding up the check whether a physical page has any code translations or not (O(n) -> O(1)). Doing a similar reduction of O(n) to O(1) by avoiding the scan through the translation entries on a translation update (32-bit mode only). Various other minor hacks. 20051029 Quick release, without any testing at all. ============== RELEASE 0.3.6.2 ============== 20051031 Adding disassembly support for more ARM instructions (clz, smul* etc), and adding a hack to support "new tiny" pages for StrongARM. 20051101 Minor documentation updates (NetBSD 2.0.2 -> 2.1, and OpenBSD 3.7 -> 3.8, and lots of testing). Changing from 1-sector PIO mode 0 transfers to 128-sector PIO mode 3 (in dev_wdc). Various minor ARM dyntrans updates (pc-relative loads from within the same page as the instruction are now treated as constant "mov"). 20051102 Re-enabling instruction combinations (they were accidentally disabled). Dyntrans TLB entries are now overwritten using a round-robin scheme instead of randomly. This increases performance. Fixing a typo in file.c (thanks to Chuan-Hua Chang for noticing it). Experimenting with adding ATAPI support to dev_wdc (to make emulated *BSD detect cdroms as cdroms, not harddisks). 20051104 Various minor updates. 20051105 Continuing on the ATAPI emulation. Seems to work well enough for a NetBSD/cats installation, but not OpenBSD/cats. Various other updates. 20051106 Modifying the -Y command line option to allow scaleup with certain graphic controllers (only dev_vga so far), not just scaledown. Some minor dyntrans cleanups. 20051107 Beginning a cleanup up the PCI subsystem (removing the read_register hack, etc). 20051108 Continuing the cleanup; splitting up some pci devices into a normal autodev device and some separate pci glue code. 20051109 Continuing on the PCI bus stuff; all old pci_*.c have been incorporated into normal devices and/or rewritten as glue code only, adding a dummy Intel 82371AB PIIX4 for Malta (not really tested yet). Minor pckbc fix so that Linux doesn't complain. Working on the DEC 21143 NIC (ethernet mac rom stuff mostly). Various other minor fixes. 20051110 Some more ARM dyntrans fine-tuning (e.g. some instruction combinations (cmps followed by conditional branch within the same page) and special cases for DPIs with regform when the shifter isn't used). 20051111 ARM dyntrans updates: O(n)->O(1) for just-mark-as-non- writable in the generic pc_to_pointers function, and some other minor hacks. Merging Cobalt and evbmips (Malta) ISA interrupt handling, and some minor fixes to allow Linux to accept harddisk irqs. 20051112 Minor device updates (pckbc, dec21143, lpt, ...), most importantly fixing the ALI M1543/M5229 so that harddisk irqs work with Linux/CATS. 20051113 Some more generalizations of the PCI subsystem. Finally took the time to add a hack for SCSI CDROM TOCs; this enables OpenBSD to use partition 'a' (as needed by the OpenBSD installer), and Windows NT's installer to get a bit further. Also fixing dev_wdc to allow Linux to detect ATAPI CDROMs. Continuing on the DEC 21143. 20051114 Minor ARM dyntrans tweaks; ARM cmps+branch optimization when comparing with 0, and generalizing the xchg instr. comb. Adding disassembly of ARM mrrc/mcrr and q{,d}{add,sub}. 20051115 Continuing on various PPC things (BATs, other address trans- lation things, various loads/stores, BeBox emulation, etc.). Beginning to work on PPC interrupt/exception support. 20051116 Factoring out some code which initializes legacy ISA devices from those machines that use them (bus_isa). Continuing on PPC interrupt/exception support. 20051117 Minor Malta fixes: RTC year offset = 80, disabling a speed hack which caused NetBSD to detect a too fast cpu, and adding a new hack to make Linux detect a faster cpu. Continuing on the Artesyn PM/PPC emulation mode. Adding an Algor emulation skeleton (P4032 and P5064); implementing some of the basics. Continuing on PPC emulation in general; usage of unimplemented SPRs is now easier to track, continuing on memory/exception related issues, etc. 20051118 More work on PPC emulation (tgpr0..3, exception handling, memory stuff, syscalls, etc.). 20051119 Changing the ARM dyntrans code to mostly use cpu->pc, and not necessarily use arm reg 15. Seems to work. Various PPC updates; continuing on the PReP emulation mode. 20051120 Adding a workaround/hack to dev_mc146818 to allow NetBSD/prep to detect the clock. 20051121 More cleanup of the PCI bus (memory and I/O bases, etc). Continuing on various PPC things (decrementer and timebase, WDCs on obio (on PReP) use irq 13, not 14/15). 20051122 Continuing on the CPC700 controller (interrupts etc) for PMPPC, and on PPC stuff in general. Finally! After some bug fixes to the virtual to physical addr translation, NetBSD/{prep,pmppc} 2.1 reach userland and are stable enough to be interacted with. More PCI updates; reverse-endian device access for PowerPC etc. 20051123 Generalizing the IEEE floating point subsystem (moving it out from src/cpus/cpu_mips_coproc.c into a new src/float_emul.c). Input via slave xterms was sometimes not really working; fixing this for ns16550, and a warning message is now displayed if multiple non-xterm consoles are active. Adding some PPC floating point support, etc. Various interrupt related updates (dev_wdc, _ns16550, _8259, and the isa32 common code in machine.c). NetBSD/prep can now be installed! :-) (Well, with some manual commands necessary before running sysinst.) Updating the documentation and various other things to reflect this. 20051124 Various minor documentation updates. Continuing the work on the DEC 21143 NIC. 20051125 LOTS of work on the 21143. Both OpenBSD and NetBSD work fine with it now, except that OpenBSD sometimes gives a time-out warning. Minor documentation updates. ============== RELEASE 0.3.7 ============== 20051126 Cobalt and PReP now work with the 21143 NIC. Continuing on Alpha dyntrans things. Fixing some more left-shift-by-24 to unsigned. 20051127 Working on OpenFirmware emulation; major cleanup/redesign. Progress on MacPPC emulation: NetBSD detects two CPUs (when running with -n 2), framebuffer output (for text) works. Adding quick-hack Bandit PCI controller and "gc" interrupt controller for MacPPC. 20051128 Changing from a Bandit to a Uni-North controller for macppc. Continuing on OpenFirmware and MacPPC emulation in general (obio controller, and wdc attached to the obio seems to work). 20051129 More work on MacPPC emulation (adding a dummy ADB controller). Continuing the PCI bus cleanup (endianness and tag composition) and rewriting all PCI controllers' access functions. 20051130 Various minor PPC dyntrans optimizations. Manually inlining some parts of the framebuffer redraw routine. Slowly beginning the conversion of the old MIPS emulation into dyntrans (but this will take quite some time to get right). Generalizing quick_pc_to_pointers. 20051201 Documentation update (David Muse has made available a kernel which simplifies Debian/DECstation installation). Continuing on the ADB bus controller. 20051202 Beginning a rewrite of the Zilog serial controller (dev_zs). 20051203 Continuing on the zs rewrite (now called dev_z8530); conversion to devinit style. Reworking some of the input-only vs output-only vs input-output details of src/console.c, better warning messages, and adding a debug dump. Removing the concept of "device state"; it wasn't really used. Changing some debug output (-vv should now be used to show all details about devices and busses; not shown during normal startup anymore). Beginning on some SPARC instruction disassembly support. 20051204 Minor PPC updates (WALNUT skeleton stuff). Continuing on the MIPS dyntrans rewrite. More progress on the ADB controller (a keyboard is "detected" by NetBSD and OpenBSD). Downgrading OpenBSD/arc as a guest OS from "working" to "almost working" in the documentation. Progress on Algor emulation ("v3" PCI controller). 20051205 Minor updates. 20051207 Sorting devices according to address; this reduces complexity of device lookups from O(n) to O(log n) in memory_rw (but no real performance increase (yet) in experiments). 20051210 Beginning the work on native dyntrans backends (by making a simple skeleton; so far only for Alpha hosts). 20051211 Some very minor SPARC updates. 20051215 Fixing a bug in the MIPS mul (note: not mult) instruction, so it also works with non-64-bit emulation. (Thanks to Alec Voropay for noticing the problem.) 20051216 More work on the fake/empty/simple/skeleton/whatever backend; performance doesn't increase, so this isn't really worth it, but it was probably worth it to prepare for a real backend later. 20051219 More instr call statistics gathering and analysis stuff. 20051220 Another fix for MIPS 'mul'. Also converting mul and {d,}cl{o,z} to dyntrans. memory_ppc.c syntax error fix (noticed by Peter Valchev). Beginning to move out machines from src/machine.c into individual files in src/machines (in a way similar to the autodev system for devices). 20051222 Updating the documentation regarding NetBSD/pmax 3.0. 20051223 - " - NetBSD/cats 3.0. 20051225 - " - NetBSD/hpcmips 3.0. 20051226 Continuing on the machine registry redesign. Adding support for ARM rrx (33-bit rotate). Fixing some signed/unsigned issues (exposed by gcc -W). 20051227 Fixing the bug which prevented a NetBSD/prep 3.0 install kernel from starting (triggered when an mtmsr was the last instruction on a page). Unfortunately not enough to get the kernel to run as well as the 2.1 kernels did. 20051230 Some dyntrans refactoring. 20051231 Continuing on the machine registry redesign. 20060101-10 Continuing... moving more machines. Moving MD interrupt stuff from machine.c into a new src/machines/interrupts.c. 20060114 Adding various mvmeppc machine skeletons. 20060115 Continuing on mvme* stuff. NetBSD/mvmeppc prints boot messages (for MVME1600) and reaches the root device prompt, but no specific hardware devices are emulated yet. 20060116 Minor updates to the mvme1600 emulation mode; the Eagle PCI bus seems to work without much modification, and a 21143 can be detected, interrupts might work (but untested so far). Adding a fake MK48Txx (mkclock) device, for NetBSD/mvmeppc. 20060121 Adding an aux control register for ARM. (A BIG thank you to Olivier Houchard for tracking down this bug.) 20060122 Adding more ARM instructions (smulXY), and dev_iq80321_7seg. 20060124 Adding disassembly of more ARM instructions (mia*, mra/mar), and some semi-bogus XScale and i80321 registers. 20060201-02 Various minor updates. Moving the last machines out of machine.c. 20060204 Adding a -c command line option, for running debugger commands before the simulation starts, but after all files have been loaded. Minor iq80321-related updates. 20060209 Minor hacks (DEVINIT macro, etc). Preparing for the generalization of the 64-bit dyntrans address translation subsystem. 20060216 Adding ARM ldrd (double-register load). 20060217 Continuing on various ARM-related stuff. 20060218 More progress on the ATA/wdc emulation for NetBSD/iq80321. NetBSD/evbarm can now be installed :-) Updating the docs, etc. Continuing on Algor emulation. ============== RELEASE 0.3.8 ============== 20060219 Various minor updates. Removing the old MIPS16 skeleton code, because it will need to be rewritten for dyntrans anyway. 20060220-22 Removing the non-working dyntrans backend support. Continuing on the 64-bit dyntrans virtual memory generalization. 20060223 More work on the 64-bit vm generalization. 20060225 Beginning on MIPS dyntrans load/store instructions. Minor PPC updates (64-bit load/store, etc). Fixes for the variable-instruction-length framework, some minor AVR updates (a simple Hello World program works!). Beginning on a skeleton for automatically generating documen- tation (for devices etc.). 20060226 PPC updates (adding some more 64-bit instructions, etc). AVR updates (more instructions). FINALLY found and fixed the zs bug, making NetBSD/macppc accept the serial console. 20060301 Adding more AVR instructions. 20060304 Continuing on AVR-related stuff. Beginning on a framework for cycle-accurate device emulation. Adding an experimental "PAL TV" device (just a dummy so far). 20060305 Adding more AVR instructions. Adding a dummy epcom serial controller (for TS7200 emulation). 20060310 Removing the emul() command from configuration files, so only net() and machine() are supported. Minor progress on the MIPS dyntrans rewrite. 20060311 Continuing on the MIPS dyntrans rewrite (adding more instructions, etc). 20060315 Adding more instructions (sllv, srav, srlv, bgtz[l], blez[l], beql, bnel, slti[u], various loads and stores). 20060316 Removing the ALWAYS_SIGNEXTEND_32 option, since it was rarely used. Adding more MIPS dyntrans instructions, and fixing bugs. 20060318 Implementing fast loads/stores for MIPS dyntrans (big/little endian, 32-bit and 64-bit modes). 20060320 Making MIPS dyntrans the default configure option; use "--enable-oldmips" to use the old bintrans system. Adding MIPS dyntrans dmult[u]; minor updates. 20060322 Continuing... adding some more instructions. Adding a simple skeleton for demangling C++ "_ZN" symbols. 20060323 Moving src/debugger.c into a new directory (src/debugger/). 20060324 Fixing the hack used to load PPC ELFs (useful for relocated Linux/ppc kernels), and adding a dummy G3 machine mode. 20060325-26 Beginning to experiment with GDB remote serial protocol connections; adding a -G command line option for selecting which TCP port to listen to. 20060330 Beginning a major cleanup to replace things like "0x%016llx" with more correct "0x%016"PRIx64, etc. Continuing on the GDB remote serial protocol support. 20060331 More cleanup, and some minor GDB remote progress. 20060402 Adding a hack to the configure script, to allow compilation on systems that lack PRIx64 etc. 20060406 Removing the temporary FreeBSD/arm hack in dev_ns16550.c and replacing it with a better fix from Olivier Houchard. 20060407 A remote debugger (gdb or ddd) can now start and stop the emulator using the GDB remote serial protocol, and registers and memory can be read. MIPS only for now. 20060408 More GDB progress: single-stepping also works, and also adding support for ARM, PowerPC, and Alpha targets. Continuing on the delay-slot-across-page-boundary issue. 20060412 Minor update: beginning to add support for the SPARC target to the remote GDB functionality. 20060414 Various MIPS updates: adding more instructions for dyntrans (eret, add), and making some exceptions work. Fixing a bug in dmult[u]. Implementing the first SPARC instructions (sethi, or). 20060415 Adding "magic trap" instructions so that PROM calls can be software emulated in MIPS dyntrans. Adding more MIPS dyntrans instructions (ddiv, dadd) and fixing another bug in dmult. 20060416 More MIPS dyntrans progress: adding [d]addi, movn, movz, dsllv, rfi, an ugly hack for supporting R2000/R3000 style faked caches, preliminary interrupt support, and various other updates and bugfixes. 20060417 Adding more SPARC instructions (add, sub, sll[x], sra[x], srl[x]), and useful SPARC header definitions. Adding the first (trivial) x86/AMD64 dyntrans instructions (nop, cli/sti, stc/clc, std/cld, simple mov, inc ax). Various other x86 updates related to variable instruction length stuff. Adding unaligned loads/stores to the MIPS dyntrans mode (but still using the pre-dyntrans (slow) imlementation). 20060419 Fixing a MIPS dyntrans exception-in-delay-slot bug. Removing the old "show opcode statistics" functionality, since it wasn't really useful and isn't implemented for dyntrans. Single-stepping (or running with instruction trace) now looks ok with dyntrans with delay-slot architectures. 20060420 Minor hacks (removing the -B command line option when compiled for non-bintrans, and some other very minor updates). Adding (slow) MIPS dyntrans load-linked/store-conditional. 20060422 Applying fixes for bugs discovered by Nils Weller's nwcc (static DEC memmap => now per machine, and adding an extern keyword in cpu_arm_instr.c). Finally found one of the MIPS dyntrans bugs that I've been looking for (copy/paste spelling error BIG vs LITTLE endian in cpu_mips_instr_loadstore.c for 16-bit fast stores). FINALLY found the major MIPS dyntrans bug: slti vs sltiu signed/unsigned code in cpu_mips_instr.c. :-) Adding more MIPS dyntrans instructions (lwc1, swc1, bgezal[l], ctc1, tlt[u], tge[u], tne, beginning on rdhwr). NetBSD/hpcmips can now reach userland when using dyntrans :-) Adding some more x86 dyntrans instructions. Finally removed the old Alpha-specific virtual memory code, and replaced it with the generic 64-bit version. Beginning to add disassembly support for SPECIAL3 MIPS opcodes. 20060423 Continuing on the delay-slot-across-page-boundary issue; adding an end_of_page2 ic slot (like I had planned before, but had removed for some reason). Adding a quick-and-dirty fallback to legacy coprocessor 1 code (i.e. skipping dyntrans implementation for now). NetBSD/hpcmips and NetBSD/pmax (when running on an emulated R4400) can now be installed and run. :-) (Many bugs left to fix, though.) Adding more MIPS dyntrans instructions: madd[u], msub[u]. Cleaning up the SPECIAL2 vs R5900/TX79/C790 "MMI" opcode maps somewhat (disassembly and dyntrans instruction decoding). 20060424 Adding an isa_revision field to mips_cpu_types.h, and making sure that SPECIAL3 opcodes cause Reserved Instruction exceptions on MIPS32/64 revisions lower than 2. Adding the SPARC 'ba', 'call', 'jmpl/retl', 'and', and 'xor' instructions. 20060425 Removing the -m command line option ("run at most x instructions") and -T ("single_step_on_bad_addr"), because they never worked correctly with dyntrans anyway. Freshening up the man page. 20060428 Adding more MIPS dyntrans instructions: bltzal[l], idle. Enabling MIPS dyntrans compare interrupts. 20060429 FINALLY found the weird dyntrans bug, causing NetBSD etc. to behave strangely: some floating point code (conditional coprocessor branches) could not be reused from the old non-dyntrans code. The "quick-and-dirty fallback" only appeared to work. Fixing by implementing bc1* for MIPS dyntrans. More MIPS instructions: [d]sub, sdc1, ldc1, dmtc1, dmfc1, cfc0. Freshening up MIPS floating point disassembly appearance. 20060430 Continuing on C790/R5900/TX79 disassembly; implementing 128-bit "por" and "pextlw". 20060504 Disabling -u (userland emulation) unless compiled as unstable development version. Beginning on freshening up the testmachine include files, to make it easier to reuse those files (placing them in src/include/testmachine/), and beginning on a set of "demos" or "tutorials" for the testmachine functionality. Minor updates to the MIPS GDB remote protocol stub. Refreshing doc/experiments.html and gdb_remote.html. Enabling Alpha emulation in the stable release configuration, even though no guest OSes for Alpha can run yet. 20060505 Adding a generic 'settings' object, which will contain references to settable variables (which will later be possible to access using the debugger). 20060506 Updating dev_disk and corresponding demo/documentation (and switching from SCSI to IDE disk types, so it actually works with current test machines :-). 20060510 Adding a -D_LARGEFILE_SOURCE hack for 64-bit Linux hosts, so that fseeko() doesn't give a warning. Updating the section about how dyntrans works (the "runnable IR") in doc/intro.html. Instruction updates (some x64=1 checks, some more R5900 dyntrans stuff: better mul/mult separation from MIPS32/64, adding ei and di). Updating MIPS cpuregs.h to a newer one (from NetBSD). Adding more MIPS dyntrans instructions: deret, ehb. 20060514 Adding disassembly and beginning implementation of SPARC wr and wrpr instructions. 20060515 Adding a SUN SPARC machine mode, with dummy SS20 and Ultra1 machines. Adding the 32-bit "rd psr" instruction. 20060517 Disassembly support for the general SPARC rd instruction. Partial implementation of the cmp (subcc) instruction. Some other minor updates (making sure that R5900 processors start up with the EIE bit enabled, otherwise Linux/playstation2 receives no interrupts). 20060519 Minor MIPS updates/cleanups. 20060521 Moving the MeshCube machine into evbmips; this seems to work reasonably well with a snapshot of a NetBSD MeshCube kernel. Cleanup/fix of MIPS config0 register initialization. 20060529 Minor MIPS fixes, including a sign-extension fix to the unaligned load/store code, which makes NetBSD/pmax on R3000 work better with dyntrans. (Ultrix and Linux/DECstation still don't work, though.) 20060530 Minor updates to the Alpha machine mode: adding an AlphaBook mode, an LCA bus (forwarding accesses to an ISA bus), etc. 20060531 Applying a bugfix for the MIPS dyntrans sc[d] instruction from Ondrej Palkovsky. (Many thanks.) 20060601 Minifix to allow ARM immediate msr instruction to not give an error for some valid values. More Alpha updates. 20060602 Some minor Alpha updates. 20060603 Adding the Alpha cmpbge instruction. NetBSD/alpha prints its first boot messages :-) on an emulated Alphabook 1. 20060612 Minor updates; adding a dev_ether.h include file for the testmachine ether device. Continuing the hunt for the dyntrans bug which makes Linux and Ultrix on DECstation behave strangely... FINALLY found it! It seems to be related to invalidation of the translation cache, on tlbw{r,i}. There also seems to be some remaining interrupt-related problems. 20060614 Correcting the implementation of ldc1/sdc1 for MIPS dyntrans (so that it uses 16 32-bit registers if the FR bit in the status register is not set). 20060616 REMOVING BINTRANS COMPLETELY! Removing the old MIPS interpretation mode. Removing the MFHILO_DELAY and instruction delay stuff, because they wouldn't work with dyntrans anyway. 20060617 Some documentation updates (adding "NetBSD-archive" to some URLs, and new Debian/DECstation installation screenshots). Removing the "tracenull" and "enable-caches" configure options. Improving MIPS dyntrans performance somewhat (only invalidate translations if necessary, on writes to the entryhi register, instead of doing it for all cop0 writes). 20060618 More cleanup after the removal of the old MIPS emulation. Trying to fix the MIPS dyntrans performance bugs/bottlenecks; only semi-successful so far (for R3000). 20060620 Minor update to allow clean compilation again on Tru64/Alpha. 20060622 MIPS cleanup and fixes (removing the pc_last stuff, which doesn't make sense with dyntrans anyway, and fixing a cross- page-delay-slot-with-exception case in end_of_page). Removing the old max_random_cycles_per_chunk stuff, and the concept of cycles vs instructions for MIPS emulation. FINALLY found and fixed the bug which caused NetBSD/pmax clocks to behave strangely (it was a load to the zero register, which was treated as a NOP; now it is treated as a load to a dummy scratch register). 20060623 Increasing the dyntrans chunk size back to N_SAFE_DYNTRANS_LIMIT, instead of N_SAFE_DYNTRANS_LIMIT/2. Preparing for a quick release, even though there are known bugs, and performance for non-R3000 MIPS emulation is very poor. :-/ Reverting to half the dyntrans chunk size again, because NetBSD/cats seemed less stable with full size chunks. :( NetBSD/sgimips 3.0 can now run :-) (With release 0.3.8, only NetBSD/sgimips 2.1 worked, not 3.0.) ============== RELEASE 0.4.0 ============== 20060624 Replacing the error-prone machine type initialization stuff with something more reasonable. Finally removing the old "cpu_run" kludge; moving around stuff in machine.c and emul.c to better suit the dyntrans system. Various minor dyntrans cleanups (renaming translate_address to translate_v2p, and experimenting with template physpages). 20060625 Removing the speed hack which separated the vph entries into two halves (code vs data); things seem a lot more stable now. Minor performance hack: R2000/R3000 cache isolation now only clears address translations when going into isolation, not when going out of it. Fixing the MIPS interrupt problems by letting mtc0 immediately cause interrupts. ============== RELEASE 0.4.0.1 ============== 20060626 Continuing on SPARC emulation (beginning on the 'save' instruction, register windows, etc). 20060629 Planning statistics gathering (new -s command line option), and renaming speed_tricks to allow_instruction_combinations. 20060630 Some minor manual page updates. Various cleanups. Implementing the -s command line option. 20060701 FINALLY found the bug which prevented Linux and Ultrix from running without the ugly hack in the R2000/R3000 cache isol code; it was the phystranslation hint array which was buggy. Removing the phystranslation hint code completely, for now. 20060702 Minor dyntrans cleanups; invalidation of physpages now only invalidate those parts of a page that have actually been translated. (32 parts per page.) Some MIPS non-R3000 speed fixes. Experimenting with MIPS instruction combination for some addiu+bne+sw loops, and sw+sw+sw. Adding support (again) for larger-than-4KB pages in MIPS tlbw*. Continuing on SPARC emulation: adding load/store instructions. 20060704 Fixing a virtual vs physical page shift bug in the new tlbw* implementation. Problem noticed by Jakub Jermar. (Many thanks.) Moving rfe and eret to cpu_mips_instr.c, since that is the only place that uses them nowadays. 20060705 Removing the BSD license from the "testmachine" include files, placing them in the public domain instead; this enables the testmachine stuff to be used from projects which are incompatible with the BSD license for some reason. 20060707 Adding instruction combinations for the R2000/R3000 L1 I-cache invalidation code used by NetBSD/pmax 3.0, lui+addiu, various branches followed by addiu or nop, and jr ra followed by addiu. The time it takes to perform a full NetBSD/pmax R3000 install on the laptop has dropped from 573 seconds to 539. :-) 20060708 Adding a framebuffer controller device (dev_fbctrl), which so far can be used to change the fb resolution during runtime, but in the future will also be useful for accelerated block fill/ copy, and possibly also simplified character output. Adding an instruction combination for NetBSD/pmax' strlen. 20060709 Minor fixes: reading raw files in src/file.c wasn't memblock aligned, removing buggy multi_sw MIPS instruction combination, etc. 20060711 Adding a machine_qemu.c, which contains a "qemu_mips" machine. (It mimics QEMU's MIPS machine mode, so that a test kernel made for QEMU_MIPS also can run in GXemul... at least to some extent.) Adding a short section about how to run this mode to doc/guestoses.html. 20060714 Misc. minor code cleanups. 20060715 Applying a patch which adds getchar() to promemul/yamon.c (from Oleksandr Tymoshenko). Adding yamon.h from NetBSD, and rewriting yamon.c to use it (instead of ugly hardcoded numbers) + some cleanup. 20060716 Found and fixed the bug which broke single-stepping of 64-bit programs between 0.4.0 and 0.4.0.1 (caused by too quick refactoring and no testing). Hopefully this fix will not break too many other things. 20060718 Continuing on the 8253 PIT; it now works with Linux/QEMU_MIPS. Re-adding the sw+sw+sw instr comb (the problem was that I had ignored endian issues); however, it doesn't seem to give any big performance gain. 20060720 Adding a dummy Transputer mode (T414, T800 etc) skeleton (only the 'j' and 'ldc' instructions are implemented so far). :-} 20060721 Adding gtreg.h from NetBSD, updating dev_gt.c to use it, plus misc. other updates to get Linux 2.6 for evbmips/malta working (thanks to Alec Voropay for the details). FINALLY found and fixed the bug which made tlbw* for non-R3000 buggy; it was a reference count problem in the dyntrans core. 20060722 Testing stuff; things seem stable enough for a new release. ============== RELEASE 0.4.1 ============== 20060723 More Transputer instructions (pfix, nfix, opr, mint, ldl, ldlp, eqc, rev, ajw, stl, stlf, sthf, sub, ldnl, ldnlp, ldpi, move, wcnt, add, bcnt). Adding more SPARC instructions (andcc, addcc, bl, rdpr). Progress on the igsfb framebuffer used by NetBSD/netwinder. Enabling 8-bit fills in dev_fb. NetBSD/netwinder 3.0.1 can now run from a disk image :-) 20060724 Cleanup/performance fix for 64-bit virtual translation table updates (by removing the "timestamp" stuff). A full NetBSD/pmax 3.0.1 install for R4400 has dropped from 667 seconds to 584 :) Fixing the igsfb "almost vga" color (it is 24-bit, not 18-bit). Adding some MIPS instruction combinations (3*lw, and 3*addu). The 8048 keyboard now turns off interrupt enable between the KBR_ACK and the KBR_RSTDONE, to work better with Linux 2.6. Not causing PPC DEC interrupts if PPC_NO_DEC is set for a specific CPU; NetBSD/bebox gets slightly further than before. Adding some more SPARC instructions: branches, udiv. 20060725 Refreshing dev_pckbc.c a little. Cleanups for the SH emulation mode, and adding the first "compact" (16-bit) instructions: various simple movs, nop, shll, stc, or, ldc. 20060726 Adding dummy "pcn" (AMD PCnet NIC) PCI glue. 20060727 Various cleanups; removing stuff from cpu.h, such as running_translated (not really meaningful anymore), and page flags (breaking into the debugger clears all translations anyway). Minor MIPS instruction combination updates. 20060807 Expanding the 3*sw and 3*lw MIPS instruction combinations to work with 2* and 4* too, resulting in a minor performance gain. Implementing a usleep hack for the RM52xx/MIPS32/MIPS64 "wait" instruction (when emulating 1 cpu). 20060808 Experimenting with some more MIPS instruction combinations. Implementing support for showing a (hardcoded 12x22) text cursor in igsfb. 20060809 Simplifying the NetBSD/evbmips (Malta) install instructions somewhat (by using a NetBSD/pmax ramdisk install kernel). 20060812 Experimenting more with the MIPS 'wait' instruction. PCI configuration register writes can now be handled, which allow PCI IDE controllers to work with NetBSD/Malta 3.0.1 and NetBSD/cobalt 3.0.1. (Previously only NetBSD 2.1 worked.) 20060813 Updating dev_gt.c based on numbers from Alec Voropay, to enable Linux 2.6 to use PCI on Malta. Continuing on Algor interrupt stuff. 20060814 Adding support for routing ISA interrupts to two different interrupts, making it possible to run NetBSD/algor :-) 20060814-15 Testing for the release. ============== RELEASE 0.4.2 ============== 20060816 Adding a framework for emulated/virtual timers (src/timer.c), using only setitimer(). Rewriting the mc146818 to use the new timer framework. 20060817 Adding a call to gettimeofday() every now and then (once every second, at the moment) to resynch the timer if it drifts. Beginning to convert the ISA timer interrupt mechanism (8253 and 8259) to use the new timer framework. Removing the -I command line option. 20060819 Adding the -I command line option again, with new semantics. Working on Footbridge timer interrupts; NetBSD/NetWinder and NetBSD/CATS now run at correct speed, but unfortunately with HUGE delays during bootup. 20060821 Some minor m68k updates. Adding the first instruction: nop. :) Minor Alpha emulation updates. 20060822 Adding a FreeBSD development specific YAMON environment variable ("khz") (as suggested by Bruce M. Simpson). Moving YAMON environment variable initialization from machine_evbmips.c into promemul/yamon.c, and adding some more variables. Continuing on the LCA PCI bus controller (for Alpha machines). 20060823 Continuing on the timer stuff: experimenting with MIPS count/ compare interrupts connected to the timer framework. 20060825 Adding bogus SCSI commands 0x51 (SCSICDROM_READ_DISCINFO) and 0x52 (SCSICDROM_READ_TRACKINFO) to the SCSI emulation layer, to allow NetBSD/pmax 4.0_BETA to be installed from CDROM. Minor updates to the LCA PCI controller. 20060827 Implementing a CHIP8 cpu mode, and a corresponding CHIP8 machine, for fun. Disassembly support for all instructions, and most of the common instructions have been implemented: mvi, mov_imm, add_imm, jmp, rand, cls, sprite, skeq_imm, jsr, skne_imm, bcd, rts, ldr, str, mov, or, and, xor, add, sub, font, ssound, sdelay, gdelay, bogus skup/skpr, skeq, skne. 20060828 Beginning to convert the CHIP8 cpu in the CHIP8 machine to a (more correct) RCA 180x cpu. (Disassembly for all 1802 instructions has been implemented, but no execution yet, and no 1805 extended instructions.) 20060829 Minor Alpha emulation updates. 20060830 Beginning to experiment a little with PCI IDE for SGI O2. Fixing the cursor key mappings for MobilePro 770 emulation. Fixing the LK201 warning caused by recent NetBSD/pmax. The MIPS R41xx standby, suspend, and hibernate instructions now behave like the RM52xx/MIPS32/MIPS64 wait instruction. Fixing dev_wdc so it calculates correct (64-bit) offsets before giving them to diskimage_access(). 20060831 Continuing on Alpha emulation (OSF1 PALcode). 20060901 Minor Alpha updates; beginning on virtual memory pagetables. Removed the limit for max nr of devices (in preparation for allowing devices' base addresses to be changed during runtime). Adding a hack for MIPS [d]mfc0 select 0 (except the count register), so that the coproc register is simply copied. The MIPS suspend instruction now exits the emulator, instead of being treated as a wait instruction (this causes NetBSD/ hpcmips to get correct 'halt' behavior). The VR41xx RTC now returns correct time. Connecting the VR41xx timer to the timer framework (fixed at 128 Hz, for now). Continuing on SPARC emulation, adding more instructions: restore, ba_xcc, ble. The rectangle drawing demo works :) Removing the last traces of the old ENABLE_CACHE_EMULATION MIPS stuff (not usable with dyntrans anyway). 20060902 Splitting up src/net.c into several smaller files in its own subdirectory (src/net/). 20060903 Cleanup of the files in src/net/, to make them less ugly. 20060904 Continuing on the 'settings' subsystem. Minor progress on the SPARC emulation mode. 20060905 Cleanup of various things, and connecting the settings infrastructure to various subsystems (emul, machine, cpu, etc). Changing the lk201 mouse update routine to not rely on any emulated hardware framebuffer cursor coordinates, but instead always do (semi-usable) relative movements. 20060906 Continuing on the lk201 mouse stuff. Mouse behaviour with multiple framebuffers (which was working in Ultrix) is now semi-broken (but it still works, in a way). Moving the documentation about networking into its own file (networking.html), and refreshing it a bit. Adding an example of how to use ethernet frame direct-access (udp_snoop). 20060907 Continuing on the settings infrastructure. 20060908 Minor updates to SH emulation: for 32-bit emulation: delay slots and the 'jsr @Rn' instruction. I'm putting 64-bit SH5 on ice, for now. 20060909-10 Implementing some more 32-bit SH instructions. Removing the 64-bit mode completely. Enough has now been implemented to run the rectangle drawing demo. :-) 20060912 Adding more SH instructions. 20060916 Continuing on SH emulation (some more instructions: div0u, div1, rotcl/rotcr, more mov instructions, dt, braf, sets, sett, tst_imm, dmuls.l, subc, ldc_rm_vbr, movt, clrt, clrs, clrmac). Continuing on the settings subsystem (beginning on reading/ writing settings, removing bugs, and connecting more cpus to the framework). 20060919 More work on SH emulation; adding an ldc banked instruction, and attaching a 640x480 framebuffer to the Dreamcast machine mode (NetBSD/dreamcast prints the NetBSD copyright banner :-), and then panics). 20060920 Continuing on the settings subsystem. 20060921 Fixing the Footbridge timer stuff so that NetBSD/cats and NetBSD/netwinder boot up without the delays. 20060922 Temporarily hardcoding MIPS timer interrupt to 100 Hz. With 'wait' support disabled, NetBSD/malta and Linux/malta run at correct speed. 20060923 Connecting dev_gt to the timer framework, so that NetBSD/cobalt runs at correct speed. Moving SH4-specific memory mapped registers into its own device (dev_sh4.c). Running with -N now prints "idling" instead of bogus nr of instrs/second (which isn't valid anyway) while idling. 20060924 Algor emulation should now run at correct speed. Adding disassembly support for some MIPS64 revision 2 instructions: ext, dext, dextm, dextu. 20060926 The timer framework now works also when the MIPS wait instruction is used. 20060928 Re-implementing checks for coprocessor availability for MIPS cop0 instructions. (Thanks to Carl van Schaik for noticing the lack of cop0 availability checks.) 20060929 Implementing an instruction combination hack which treats NetBSD/pmax' idle loop as a wait-like instruction. 20060930 The ENTRYHI_R_MASK was missing in (at least) memory_mips_v2p.c, causing TLB lookups to sometimes succeed when they should have failed. (A big thank you to Juli Mallett for noticing the problem.) Adding disassembly support for more MIPS64 revision 2 opcodes (seb, seh, wsbh, jalr.hb, jr.hb, synci, ins, dins, dinsu, dinsm, dsbh, dshd, ror, dror, rorv, drorv, dror32). Also implementing seb, seh, dsbh, dshd, and wsbh. Implementing an instruction combination hack for Linux/pmax' idle loop, similar to the NetBSD/pmax case. 20061001 Changing the NetBSD/sgimips install instructions to extract files from an iso image, instead of downloading them via ftp. 20061002 More-than-31-bit userland addresses in memory_mips_v2p.c were not actually working; applying a fix from Carl van Schaik to enable them to work + making some other updates (adding kuseg support). Fixing hpcmips (vr41xx) timer initialization. Experimenting with O(n)->O(1) reduction in the MIPS TLB lookup loop. Seems to work both for R3000 and non-R3000. 20061003 Continuing a little on SH emulation (adding more control registers; mini-cleanup of memory_sh.c). 20061004 Beginning on a dev_rtc, a clock/timer device for the test machines; also adding a demo, and some documentation. Fixing a bug in SH "mov.w @(disp,pc),Rn" (the result wasn't sign-extended), and adding the addc and ldtlb instructions. 20061005 Contining on SH emulation: virtual to physical address translation, and a skeleton exception mechanism. 20061006 Adding more SH instructions (various loads and stores, rte, negc, muls.w, various privileged register-move instructions). 20061007 More SH instructions: various move instructions, trapa, div0s, float, fdiv, ftrc. Continuing on dev_rtc; removing the rtc demo. 20061008 Adding a dummy Dreamcast PROM module. (Homebrew Dreamcast programs using KOS libs need this.) Adding more SH instructions: "stc vbr,rn", rotl, rotr, fsca, fmul, fadd, various floating-point moves, etc. A 256-byte demo for Dreamcast runs :-) 20061012 Adding the SH "lds Rm,pr" and bsr instructions. 20061013 More SH instructions: "sts fpscr,rn", tas.b, and some more floating point instructions, cmp/str, and more moves. Adding a dummy dev_pvr (Dreamcast graphics controller). 20061014 Generalizing the expression evaluator (used in the built-in debugger) to support parentheses and +-*/%^&|. 20061015 Removing the experimental tlb index hint code in mips_memory_v2p.c, since it didn't really have any effect. 20061017 Minor SH updates; adding the "sts pr,Rn", fcmp/gt, fneg, frchg, and some other instructions. Fixing missing sign- extension in an 8-bit load instruction. 20061019 Adding a simple dev_dreamcast_rtc. Implementing memory-mapped access to the SH ITLB/UTLB arrays. 20061021 Continuing on various SH and Dreamcast things: sh4 timers, debug messages for dev_pvr, fixing some virtual address translation bugs, adding the bsrf instruction. The NetBSD/dreamcast GENERIC_MD kernel now reaches userland :) Adding a dummy dev_dreamcast_asic.c (not really useful yet). Implementing simple support for Store Queues. Beginning on the PVR Tile Accelerator. 20061022 Generalizing the PVR framebuffer to support off-screen drawing, multiple bit-depths, etc. (A small speed penalty, but most likely worth it.) Adding more SH instructions (mulu.w, fcmp/eq, fsub, fmac, fschg, and some more); correcting bugs in "fsca" and "float". 20061024 Adding the SH ftrv (matrix * vector) instruction. Marcus Comstedt's "tatest" example runs :) (wireframe only). Correcting disassembly for SH floating point instructions that use the xd* registers. Adding the SH fsts instruction. In memory_device_dyntrans_access(), only the currently used range is now invalidated, and not the entire device range. 20061025 Adding a dummy AVR32 cpu mode skeleton. 20061026 Various Dreamcast updates; beginning on a Maple bus controller. 20061027 Continuing on the Maple bus. A bogus Controller, Keyboard, and Mouse can now be detected by NetBSD and KOS homebrew programs. Cleaning up the SH4 Timer Management Unit, and beginning on SH4 interrupts. Implementing the Dreamcast SYSASIC. 20061028 Continuing on the SYSASIC. Adding the SH fsqrt instruction. memory_sh.c now actually scans the ITLB. Fixing a bug in dev_sh4.c, related to associative writes into the memory-mapped UTLB array. NetBSD/dreamcast now reaches userland stably, and prints the "Terminal type?" message :-] Implementing enough of the Dreamcast keyboard to make NetBSD accept it for input. Enabling SuperH for stable (non-development) builds. Adding NetBSD/dreamcast to the documentation, although it doesn't support root-on-nfs yet. 20061029 Changing usleep(1) calls in the debugger to usleep(10000) (according to Brian Foley, this makes GXemul run better on MacOS X). Making the Maple "Controller" do something (enough to barely interact with dcircus.elf). 20061030-31 Some progress on the PVR. More test programs start running (but with strange output). Various other SH4-related updates. 20061102 Various Dreamcast and SH4 updates; more KOS demos run now. 20061104 Adding a skeleton dev_mb8696x.c (the Dreamcast's LAN adapter). 20061105 Continuing on the MB8696x; NetBSD/dreamcast detects it as mbe0. Testing for the release. ============== RELEASE 0.4.3 ============== 20061107 Adding a new disk image option (-d o...) which sets the ISO9660 filesystem base offset; also making some other hacks to allow NetBSD/dreamcast and homebrew demos/games to boot directly from a filesystem image. Moving Dreamcast-specific stuff in the documentation to its own page (dreamcast.html). Adding a border to the Dreamcast PVR framebuffer. 20061108 Adding a -T command line option (again?), for halting the emulator on unimplemented memory accesses. 20061109 Continuing on various SH4 and Dreamcast related things. The emulator should now halt on more unimplemented device accesses, instead of just printing a warning, forcing me to actually implement missing stuff :) 20061111 Continuing on SH4 and Dreamcast stuff. Adding a bogus Landisk (SH4) machine mode. 20061112 Implementing some parts of the Dreamcast GDROM device. With some ugly hacks, NetBSD can (barely) mount an ISO image. 20061113 NetBSD/dreamcast now starts booting from the Live CD image, but crashes randomly quite early on in the boot process. 20061122 Beginning on a skeleton interrupt.h and interrupt.c for the new interrupt subsystem. 20061124 Continuing on the new interrupt system; taking the first steps to attempt to connect CPUs (SuperH and MIPS) and devices (dev_cons and SH4 timer interrupts) to it. Many things will probably break from now on. 20061125 Converting dev_ns16550, dev_8253 to the new interrupt system. Attempting to begin to convert the ISA bus. 20061130 Incorporating a patch from Brian Foley for the configure script, which checks for X11 libs in /usr/X11R6/lib64 (which is used on some Linux systems). 20061227 Adding a note in the man page about booting from Dreamcast CDROM images (i.e. that no external kernel is needed). 20061229 Continuing on the interrupt system rewrite: beginning to convert more devices, adding abort() calls for legacy interrupt system calls so that everything now _has_ to be rewritten! Almost all machine modes are now completely broken. 20061230 More progress on removing old interrupt code, mostly related to the ISA bus + devices, the LCA bus (on AlphaBook1), and the Footbridge bus (for CATS). And some minor PCI stuff. Connecting the ARM cpu to the new interrupt system. The CATS, NetWinder, and QEMU_MIPS machine modes now work with the new interrupt system :) 20061231 Connecting PowerPC CPUs to the new interrupt system. Making PReP machines (IBM 6050) work again. Beginning to convert the GT PCI controller (for e.g. Malta and Cobalt emulation). Some things work, but not everything. Updating Copyright notices for 2007. 20070101 Converting dev_kn02 from legacy style to devinit; the 3max machine mode now works with the new interrupt system :-] 20070105 Beginning to convert the SGI O2 machine to the new interrupt system; finally converting O2 (IP32) devices to devinit, etc. 20070106 Continuing on the interrupt system redesign/rewrite; KN01 (PMAX), KN230, and Dreamcast ASIC interrupts should work again, moving out stuff from machine.h and devices.h into the corresponding devices, beginning the rewrite of i80321 interrupts, etc. 20070107 Beginning on the rewrite of Eagle interrupt stuff (PReP, etc). 20070117 Beginning the rewrite of Algor (V3) interrupts (finally changing dev_v3 into devinit style). 20070118 Removing the "bus" registry concept from machine.h, because it was practically meaningless. Continuing on the rewrite of Algor V3 ISA interrupts. 20070121 More work on Algor interrupts; they are now working again, well enough to run NetBSD/algor. :-) 20070122 Converting VR41xx (HPCmips) interrupts. NetBSD/hpcmips can be installed using the new interrupt system :-) 20070123 Making the testmips mode work with the new interrupt system. 20070127 Beginning to convert DEC5800 devices to devinit, and to the new interrupt system. Converting Playstation 2 devices to devinit, and converting the interrupt system. Also fixing a severe bug: the interrupt mask register on Playstation 2 is bitwise _toggled_ on writes. 20070128 Removing the dummy NetGear machine mode and the 8250 device (which was only used by the NetGear machine). Beginning to convert the MacPPC GC (Grand Central) interrupt controller to the new interrupt system. Converting Jazz interrupts (PICA61 etc.) to the new interrupt system. NetBSD/arc can be installed again :-) Fixing the JAZZ timer (hardcoding it at 100 Hz, works with NetBSD and it is better than a completely dummy timer as it was before). Converting dev_mp to the new interrupt system, although I haven't had time to actually test it yet. Completely removing src/machines/interrupts.c, cpu_interrupt and cpu_interrupt_ack in src/cpu.c, and src/include/machine_interrupts.h! Adding fatal error messages + abort() in the few places that are left to fix. Converting dev_z8530 to the new interrupt system. FINALLY removing the md_int struct completely from the machine struct. SH4 fixes (adding a PADDR invalidation in the ITLB replacement code in memory_sh.c); the NetBSD/dreamcast LiveCD now runs all the way to the login prompt, and can be interacted with :-) Converting the CPC700 controller (PCI and interrupt controller for PM/PPC) to the new interrupt system. 20070129 Fixing MACE ISA interrupts (SGI IP32 emulation). Both NetBSD/ sgimips' and OpenBSD/sgi's ramdisk kernels can now be interacted with again. 20070130 Moving out the MIPS multi_lw and _sw instruction combinations so that they are auto-generated at compile time instead. 20070131 Adding detection of amd64/x86_64 hosts in the configure script, for doing initial experiments (again :-) with native code generation. Adding a -k command line option to set the size of the dyntrans cache, and a -B command line option to disable native code generation, even if GXemul was compiled with support for native code generation for the specific host CPU architecture. 20070201 Experimenting with a skeleton for native code generation. Changing the default behaviour, so that native code generation is now disabled by default, and has to be enabled by using -b on the command line. 20070202 Continuing the native code generation experiments. Making PCI interrupts work for Footbridge again. 20070203 More native code generation experiments. Removing most of the native code generation experimental code, it does not make sense to include any quick hacks like this. Minor cleanup/removal of some more legacy MIPS interrupt code. 20070204 Making i80321 interrupts work again (for NetBSD/evbarm etc.), and fixing the timer at 100 Hz. 20070206 Experimenting with removing the wdc interrupt slowness hack. 20070207 Lowering the number of dyntrans TLB entries for MIPS from 192 to 128, resulting in a minor speed improvement. Minor optimization to the code invalidation routine in cpu_dyntrans.c. 20070208 Increasing (experimentally) the nr of dyntrans instructions per loop from 60 to 120. 20070210 Commenting out (experimentally) the dyntrans_device_danger detection in memory_rw.c. Changing the testmips and baremips machines to use a revision 2 MIPS64 CPU by default, instead of revision 1. Removing the dummy i960, IA64, x86, AVR32, and HP PA-RISC files, the PC bios emulation, and the Olivetti M700 (ARC) and db64360 emulation modes. 20070211 Adding an "mp" demo to the demos directory, which tests the SMP functionality of the testmips machine. Fixing PReP interrupts some more. NetBSD/prep now boots again. 20070216 Adding a "nop workaround" for booting Mach/PMAX to the documentation; thanks to Artur Bujdoso for the values. Converting more of the MacPPC interrupt stuff to the new system. Beginning to convert BeBox interrupts to the new system. PPC603e should NOT have the PPC_NO_DEC flag! Removing it. Correcting BeBox clock speed (it was set to 100 in the NetBSD bootinfo block, but should be 33000000/4), allowing NetBSD to start without using the (incorrect) PPC_NO_DEC hack. 20070217 Implementing (slow) AltiVec vector loads and stores, allowing NetBSD/macppc to finally boot using the GENERIC kernel :-) Updating the documentation with install instructions for NetBSD/macppc. 20070218-19 Regression testing for the release. ============== RELEASE 0.4.4 ============== 20070224 Minor update to the initialization of the ns16550 in machine_walnut.c, to allow that machine type to boot with the new interrupt system (although it is still a dummy machine). Adding a wdc at 0x14000000 to machine_landisk.c, and fixing the SCIF serial interrupts of the SH4 cpu enough to get NetBSD/landisk booting from a disk image :-) Adding a preliminary install instruction skeleton to guestoses.html. 20070306 Adding SH-IPL+G PROM emulation, and also passing the "end" symbol in r5 on bootup, for Landisk emulation. This is enough to get OpenBSD/landisk to install :) Adding a preliminary install instruction skeleton to the documentation. SuperH emulation is still shaky, though :-/ 20070307 Fixed a strangeness in memory_sh.c (read/write was never returned for any page). (Unknown whether this fixes any actual problems, though.) 20070308 dev_ram.c fix: invalidate code translations on writes to RAM, emulated as separate devices. Linux/dreamcast gets further in the boot process than before, but still bugs out in userland. Fixing bugs in the "stc.l gbr,@-rN" and "ldc.l @rN+,gbr" SuperH instructions (they should NOT check the MD bit), allowing the Linux/dreamcast Live CD to reach userland correctly :-) 20070310 Changing the cpu name "Alpha" in src/useremul.c to "21364" to unbreak userland syscall emulation of FreeBSD/Alpha binaries. 20070314 Applying a patch from Michael Yaroslavtsev which fixes the previous Linux lib64 patch to the configure script. 20070315 Adding a (dummy) sun4v machine type, and SPARC T1 cpu type. 20070316 Creating a new directory, src/disk, and moving diskimage.c to it. Separating out bootblock loading stuff from emul.c into new files in src/disk. Adding some more SPARC registers. 20070318 Preparing/testing for a minirelease, 0.4.4.1. ============== RELEASE 0.4.4.1 ============== 20070324 Adding a "--debug" option to the configure script, to disable optimizations in unstable development builds. Moving out SCSI-specific stuff from diskimage.c into a new diskimage_scsicmd.c. Applying Håvard Eidnes' patch for SCSICDROM_READ_DISKINFO and SCSICDROM_READ_TRACKINFO. (Not really tested yet.) Implementing disk image "overlays" (to allow simple roll-back to previous disk state). Adding a 'V' disk flag for this, and updating the man page and misc.html. 20070325 Stability fix to cpu_dyntrans.c, when multiple physical pages share the same initial table entry. (The ppp == NULL check should be physpage_ofs == 0.) Bug found by analysing GXemul against a version patched for Godson. Fixing a second occurance of the same problem (also in cpu_dyntrans.c). Fixing a MAJOR physical page leak in cpu_dyntrans.c; pages weren't _added_ to the set of translated pages, they _replaced_ all previous pages. It's amazing that this bug has been able to live for this long. (Triggered when emulating >128MB RAM.) 20070326 Removing the GDB debugging stub support; it was too hackish and ugly. 20070328 Moving around some native code generation skeleton code. 20070329 The -lm check in the configure script now also checks for sin() in addition to sqrt(). (Thanks to Nigel Horne for noticing that sqrt was not enough on Fedora Core 6.) (Not verified yet.) 20070330 Fixing an indexing bug in dev_sh4.c, found by using gcc version 4.3.0 20070323. 20070331 Some more experimentation with native code generation. 20070404 Attempting to fix some more SH4 SCIF interrupt bugs; rewriting the SH interrupt assertion/deassertion code somewhat. 20070410 Splitting src/file.c into separate files in src/file/. Cleanup: Removing the dummy TS7200, Walnut, PB1000, and Meshcube emulation modes, and dev_epcom and dev_au1x00. Removing the experimental CHIP8/RCA180x code; it wasn't really working much lately, anyway. It was fun while it lasted. Also removing the experimental Transputer CPU support. 20070412 Moving the section about how the dynamic translation system works from intro.html to a separate translation.html file. Minor SH fixes; attempting to get OpenBSD/landisk to run without randomly bugging out, but no success yet. 20070413 SH SCI (serial bit interface) should now work together with a (new) RS5C313 clock device (for Landisk emulation). 20070414 Moving Redhat/MIPS down from supported to experimental, in guestoses.html. Preparing for a new release; doing some regression testing etc. ============== RELEASE 0.4.5 ============== 20070415 Landisk PCLOCK should be 33.33 MHz, not 50 MHz. (This makes the clock run at correct speed.) FINALLY found and fixed the bug which caused OpenBSD/landisk to randomly bug out: an &-sign was missing in the special case handling of FPSCR in the 'LDS.L @Rm+,FPSCR' instruction. Adding similar special case handling for 'LDC.L @Rm+,SR' (calling sh_update_sr() instead of just loading). Implementing the 'FCNVSD FPUL,DRn' and 'FCNVDS DRm,FPUL' SuperH instructions. The 'LDC Rm,SR' instruction now immediately breaks out of the dyntrans loop if an interrupt is to be triggered. 20070416 In memory_rw.c, if mapping a page as writable, make sure to invalidate code translations even if the data access was a read. Minor SuperH updates. 20070418 Removing the dummy M68K emulation mode. Minor SH update (turning unnecessary sts_mach_rn, sts_macl_rn, and sts_pr_rn instruction handlers into mov_rm_rn). 20070419 Beginning to add a skeleton for an M88K mode: Adding a hack to allow OpenBSD/m88k a.out binaries to be loaded, and disassembly of a few simple 88K instructions. Commenting out the 'LDC Rm,SR' fix from a few days ago, because it made Linux/dreamcast bug out. Adding a hack to dev_sh4.c (an extra translation cache invalidation), which allows OpenBSD/landisk to boot ok after an install. Upgrading the Landisk machine mode to stable, updating documentation, etc. 20070420 Experimenting with adding a PCI controller (pcic) to dev_sh4. Adding a dummy Realtek 8139C+ skeleton device (dev_rtl8139c). Implementing the first M88K instructions (br, or[.u] imm), and adding disassembly of some more instructions. 20070421 Continuing a little on dev_rtl8139c. 20070422 Implementing the 9346 EEPROM "read" command for dev_rtl8139c. Finally found and fixed an old bug in the log n symbol search (it sometimes missed symbols). Debug trace (-i, -t etc) should now show more symbols. :-) 20070423 Continuing a little on M88K disassembly. 20070428 Fixing a memset arg order bug in src/net/net.c (thanks to Nigel Horne for noticing the bug). Applying parts of a patch from Carl van Schaik to clear out bottom bits of MIPS addresses more correctly, when using large page sizes, and doing some other minor cleanup/refactoring. Fixing a couple of warnings given by gcc with the -W option (a few more warnings than just plain -Wall). Reducing SuperH dyntrans physical address space from 64-bit to 32-bit (since SH5/SH64 isn't imlemented yet anyway). Adding address-to-symbol annotation to a few more instructions in the SuperH instruction trace output. Beginning regression testing for the next release. Reverting the value of SCIF_DELAYED_TX_VALUE from 1 to 2, because OpenBSD/landisk may otherwise hang randomly. 20070429 The ugly hack/workaround to get OpenBSD/landisk booting without crashing does NOT work anymore (with the April 21 snapshot of OpenBSD/landisk). Strangely enough, removing the hack completely causes OpenBSD/landisk to work (!). More regression testing (re-testing everything SuperH-related, and some other things). Cobalt interrupts were actually broken; fixing by commenting out the DEC21143s in the Cobalt machine. 20070430 More regression testing. 20070501 Updating the OpenBSD/landisk install instructions to use 4.1 instead of the current snapshot. GAAAH! OpenBSD/landisk 4.1 _needs_ the ugly hack/workaround; reintroducing it again. (The 4.1 kernel is actually from 2007-03-11.) Simplifying the NetBSD/evbarm install instructions a bit. More regression testing. ============== RELEASE 0.4.5.1 ============== 20070501 Continuing a little on m88k disassembly (control registers, more instructions). Adding a dummy mvme88k machine mode. 20070502 Re-adding MIPS load/store alignment exceptions. 20070503 Implementing more of the M88K disassembly code. 20070504 Adding disassembly of some more M88K load/store instructions. Implementing some relatively simple M88K instructions (br.n, xor[.u] imm, and[.u] imm). 20070505 Implementing M88K three-register and, or, xor, and jmp[.n], bsr[.n] including function call trace stuff. Applying a patch from Bruce M. Simpson which implements the SYSCON_BOARD_CPU_CLOCK_FREQ_ID object of the syscon call in the yamon PROM emulation. 20070506 Implementing M88K bb0[.n] and bb1[.n], and skeletons for ldcr and stcr (although no control regs are implemented yet). 20070509 Found and fixed the bug which caused Linux for QEMU_MIPS to stop working in 0.4.5.1: It was a faulty change to the MIPS 'sc' and 'scd' instructions I made while going through gcc -W warnings on 20070428. 20070510 Updating the Linux/QEMU_MIPS section in guestoses.html to use mips-test-0.2.tar.gz instead of 0.1. A big thank you to Miod Vallat for sending me M88K manuals. Implementing more M88K instructions (addu, subu, div[u], mulu, ext[u], clr, set, cmp). 20070511 Fixing bugs in the M88K "and" and "and.u" instructions (found by comparing against the manual). Implementing more M88K instructions (mask[.u], mak, bcnd (auto- generated)) and some more control register details. Cleanup: Removing the experimental AVR emulation mode and corresponding devices; AVR emulation wasn't really meaningful. Implementing autogeneration of most M88K loads/stores. The rectangle drawing demo (with -O0) for M88K runs :-) Beginning on M88K exception handling. More M88K instructions: tb0, tb1, rte, sub, jsr[.n]. Adding some skeleton MVME PROM ("BUG") emulation. 20070512 Fixing a bug in the M88K cmp instruction. Adding the M88K lda (scaled register) instruction. Fixing bugs in 64-bit (32-bit pairs) M88K loads/stores. Removing the unused tick_hz stuff from the machine struct. Implementing the M88K xmem instruction. OpenBSD/mvme88k gets far enough to display the Copyright banner :-) Implementing subu.co (guess), addu.co, addu.ci, ff0, and ff1. Adding a dev_mvme187, for MVME187-specific devices/registers. OpenBSD/mvme88k prints more boot messages. :) 20070515 Continuing on MVME187 emulation (adding more devices, beginning on the CMMUs, etc). Adding the M88K and.c, xor.c, and or.c instructions, and making sure that mul, div, etc cause exceptions if executed when SFD1 is disabled. 20070517 Continuing on M88K and MVME187 emulation in general; moving the CMMU registers to the CPU struct, separating dev_pcc2 from dev_mvme187, and beginning on memory_m88k.c (BATC and PATC). Fixing a bug in 64-bit (32-bit pairs) M88K fast stores. Implementing the clock part of dev_mk48txx. Implementing the M88K fstcr and xcr instructions. Implementing m88k_cpu_tlbdump(). Beginning on the implementation of a separate address space for M88K .usr loads/stores. 20070520 Removing the non-working (skeleton) Sandpoint, SonyNEWS, SHARK Dnard, and Zaurus machine modes. Experimenting with dyntrans to_be_translated read-ahead. It seems to give a very small performance increase for MIPS emulation, but a large performance degradation for SuperH. Hm. 20070522 Disabling correct SuperH ITLB emulation; it does not seem to be necessary in order to let SH4 guest OSes run, and it slows down userspace code. Implementing "samepage" branches for SuperH emulation, and some other minor speed hacks. 20070525 Continuing on M88K memory-related stuff: exceptions, memory transaction register contents, etc. Implementing the M88K subu.ci instruction. Removing the non-working (skeleton) Iyonix machine mode. OpenBSD/mvme88k reaches userland :-), starts executing /sbin/init's instructions, and issues a few syscalls, before crashing. 20070526 Fixing bugs in dev_mk48txx, so that OpenBSD/mvme88k detects the correct time-of-day. Implementing a generic IRQ controller for the test machines (dev_irqc), similar to a proposed patch from Petr Stepan. Experimenting some more with translation read-ahead. Adding an "expect" script for automated OpenBSD/landisk install regression/performance tests. 20070527 Adding a dummy mmEye (SH3) machine mode skeleton. FINALLY found the strange M88K bug I have been hunting: I had not emulated the SNIP value for exceptions occurring in branch delay slots correctly. Implementing correct exceptions for 64-bit M88K loads/stores. Address to symbol lookups are now disabled when M88K is running in usermode (because usermode addresses don't have anything to do with supervisor addresses). 20070531 Removing the mmEye machine mode skeleton. 20070604 Some minor code cleanup. 20070605 Moving src/useremul.c into a subdir (src/useremul/), and cleaning up some more legacy constructs. Adding -Wstrict-aliasing and -fstrict-aliasing detection to the configure script. 20070606 Adding a check for broken GCC on Solaris to the configure script. (GCC 3.4.3 on Solaris cannot handle static variables which are initialized to 0 or NULL. :-/) Removing the old (non-working) ARC emulation modes: NEC RD94, R94, R96, and R98, and the last traces of Olivetti M700 and Deskstation Tyne. Removing the non-working skeleton WDSC device (dev_wdsc). 20070607 Thinking about how to use the host's cc + ld at runtime to generate native code. (See experiments/native_cc_ld_test.i for an example.) 20070608 Adding a program counter sampling timer, which could be useful for native code generation experiments. The KN02_CSR_NRMMOD bit in the DECstation 5000/200 (KN02) CSR should always be set, to allow a 5000/200 PROM to boot. 20070609 Moving out breakpoint details from the machine struct into a helper struct, and removing the limit on max nr of breakpoints. 20070610 Moving out tick functions into a helper struct as well (which also gets rid of the max limit). 20070612 FINALLY figured out why Debian/DECstation stopped working when translation read-ahead was enabled: in src/memory_rw.c, the call to invalidate_code_translation was made also if the memory access was an instruction load (if the page was mapped as writable); it shouldn't be called in that case. 20070613 Implementing some more MIPS32/64 revision 2 instructions: di, ei, ext, dext, dextm, dextu, and ins. 20070614 Implementing an instruction combination for the NetBSD/arm idle loop (making the host not use any cpu if NetBSD/arm inside the emulator is not using any cpu). Increasing the nr of ARM VPH entries from 128 to 384. 20070615 Removing the ENABLE_arch stuff from the configure script, so that all included architectures are included in both release and development builds. Moving memory related helper functions from misc.c to memory.c. Adding preliminary instructions for netbooting NetBSD/pmppc to guestoses.html; it doesn't work yet, there are weird timeouts. Beginning a total rewrite of the userland emulation modes (removing all emulation modes, beginning from scratch with NetBSD/MIPS and FreeBSD/Alpha only). 20070616 After fixing a bug in the DEC21143 NIC (the TDSTAT_OWN bit was only cleared for the last segment when transmitting, not all segments), NetBSD/pmppc boots with root-on-nfs without the timeouts. Updating guestoses.html. Removing the skeleton PSP (Playstation Portable) mode. Moving X11-related stuff in the machine struct into a helper struct. Cleanup of out-of-memory checks, to use a new CHECK_ALLOCATION macro (which prints a meaningful error message). Adding a COMMENT to each machine and device (for automagic .index comment generation). Doing regression testing for the next release. ============== RELEASE 0.4.6 ============== 20070616 Implementing the MIPS32/64 revision 2 "ror" instruction. 20070617 Adding a struct for each physpage which keeps track of which ranges within that page (base offset, length) that are continuously translatable. When running with native code generation enabled (-b), a range is added after each read- ahead loop. Experimenting with using the physical program counter sample data (implemented 20070608) together with the "translatable range" information, to figure out which physical address ranges would be worth translating to native code (if the number of samples falling within a range is above a certain threshold). 20070618 Adding automagic building of .index comment files for src/file/, src/promemul/, src src/useremul/ as well. Adding a "has been translated" bit to the ranges, so that only not-yet-translated ranges will be sampled. 20070619 Moving src/cpu.c and src/memory_rw.c into src/cpus/, src/device.c into src/devices/, and src/machine.c into src/machines/. Creating a skeleton cc/ld native backend module; beginning on the function which will detect cc command line, etc. 20070620 Continuing on the native code generation infrastructure. 20070621 Moving src/x11.c and src/console.c into a new src/console/ subdir (for everything that is console or framebuffer related). Moving src/symbol*.c into a new src/symbol/, which should contain anything that is symbol handling related. 20070624 Making the program counter sampling threshold a "settings variable" (sampling_threshold), i.e. it can now be changed during runtime. Switching the RELEASE notes format from plain text to HTML. If the TMPDIR environment variable is set, it is used instead of "/tmp" for temporary files. Continuing on the cc/ld backend: simple .c code is generated, the compiler and linker are called, etc. Adding detection of host architecture to the configure script (again), and adding icache invalidation support (only implemented for Alpha hosts so far). 20070625 Simplifying the program counter sampling mechanism. 20070626 Removing the cc/ld native code generation stuff, program counter sampling, etc; it would not have worked well in the general case. 20070627 Removing everything related to native code generation. 20070629 Removing the (practically unusable) support for multiple emulations. (The single emulation allowed now still supports multiple simultaneous machines, as before.) Beginning on PCCTWO and M88K interrupts. 20070723 Adding a dummy skeleton for emulation of M32R processors. 20070901 Fixing a warning found by "gcc version 4.3.0 20070817 (experimental)" on amd64. 20070905 Removing some more traces of the old "multiple emulations" code. Also looking in /usr/local/include and /usr/local/lib for X11 libs, when running configure. 20070909 Minor updates to the guest OS install instructions, in preparation for the NetBSD 4.0 release. 20070918 More testing of NetBSD 4.0 RC1. 20070920 Adding a section about HelenOS (for testarm and testmips) to the guestoses.html page. 20071014 src/console/console.c now includes <sys/select.h> (thanks to Juli Mallett for noticing that this was required on Cygwin). 20071017 Updating Sprite URL in guestoses.html. 20071102 Updating the OpenBSD/landisk install instructions in guestoses.html from OpenBSD 4.1 to 4.2. 20071112 Branching in CVS to a 0.4.6.1 version, separate from the main development. (This is the 0.4.6.1 branch.) 20071219 NetBSD 4.0 has been released. Doing regression testing of some systems listed on guestoses.html. Fixing an alignment bug in dev_vga, when allocating 1 byte. ============== RELEASE 0.4.6.1 ============== 20080118 Applying a WDC patch from Oleksandr Tymoshenko (dev_wdc.c and bus_pci.c), fixing the order of 16-bit words within 32-bit words in the identify struct, and not clearing the error on reads from the error register anymore. ============== RELEASE 0.4.6.2 ============== 20080120 Some minor OpenFirmware fixes: Adding a "memory" property to "/chosen", adding a dummy claim() service. 20080205 Switching order of DINCLUDE and XINCLUDE in src/devices/Makefile (thanks to Ning Zhao for the tip). 20080222 Adding a DEV_DISK_OFFSET_HIGH32 register, for reading/writing the top 32 bits of the offset register (useful for emulated 32-bit archs), as suggested by Julian Elischer. ============== RELEASE 0.4.6.3 ============== 20080605 Fixing a corner case in ARM pc-relative loads, which was unimplemented before. (Triggered by doing builds of pkgsrc stuff inside emulated NetBSD/cats.) 20080610 Applying a patch from Jiri Svoboda, which implements the ARM "bkpt" instruction. ============== RELEASE 0.4.6.4 ============== 20080611 Correcting the ARM pc-relative load fix; the wrong address variable was used. Also, the pc-relative _load_ code was used for stores as well, which was completely incorrect. On ARM, since pc-relative loads are converted into immediate movs, on writes to pages that contain such translations, the ENTIRE page must be invalidated, not just the 1/32th that was code. This has now been implemented. ============== RELEASE 0.4.6.5 ============== 20080808 Applying a patch from Kiyotaka Inaba which causes an ARM UND exception to be generated by the instruction word 0xe6000011, which is needed by gdb when running inside the emulator. Also enabling ARM UND exceptions for ARM floating point instructions (needed by both Linux and NetBSD/arm). 20081103 Fix for a free() bug in bootblock_iso9660.c. Updating the OpenBSD/landisk installation instructions from 4.2 to 4.4, after verifying that it works. 20081104 NOTE: I'm throwing away the C++ rewrite attempt ("0.5.x"), moving back gxemul-legacy to gxemul/trunk. The old C++ rewrite attempt is archived under gxemul/branches/. 20081109 Updating most NetBSD 4.0 install instructions to 4.0.1. ============== RELEASE 0.4.6.6 ============== 20081114 Adding the M88K 'add' instruction for immediate values (add_imm in cpu_m88k_instr.c). Continuing on dev_pcc2 (used by mvme187). Working on M88K interrupts. Very unstable so far; OpenBSD/ mvme88k bugs out randomly after the first few interrupts. 20081115 More work on dev_pcc2. Found the "random" failure bug: the M88K interrupt handling code didn't execute the interrupted instruction, but skipped it instead. Fixing a bug in the implementation of the m88k 'ext' instruction (it worked like extu!). Adding disassembly of all 88100 floating point instructions. Minor updates to make the code build with GCC "4.4.0 20081017". 20081116 Implementing the m88k flt.ss, flt.ds, trnc.ss, trnc.sd, and fadd.dds floating point instructions. 20081121 Updating the HelenOS version in the documentation to 0.3.0. Continuing on 88100 interrupt/exception handling. 20081125 Bringing back the dummy machine_iyonix.c, which was removed in SVN rev. 4866. Fixing a bug in ARM pc-relative loads, when loading within the same page as the pc. 20081126 Continuing on the Iyonix mode: connecting initial i80321 interrupts, and importing NetBSD/iyonix' bootconfig.h. 20081127 Importing iopi2creg.h from NetBSD (ARM Xscale I2C registers). Implementing the SH4 fsrra instruction, 1/sqrt(x), and the fipr instruction (vector dot-product). 20081203 Using register names in dev_clmpcc, but no actual progress on getting OpenBSD/mvme88k to boot further. FINALLY found the M88K bug I've been hunting: conditional branches with delay slots did not set the delay target address correctly in the case the branch was _not_ taken. 20081204 Interrupt exceptions (in cpu_dyntrans.c) are no longer generated while single-stepping. (It was too annoying.) 20081206 Implementing rudimentary tx/rx interrupts for clmpcc; OpenBSD/mvme88k can input/output stuff in userland now :) Implementing the "max negative number" condition of the M88K bcnd instruction. Implementing the M88K triadic register 'rot' instruction. The FIP != NIP+4 situation in the M88K rte instruction is now supported (i.e. executing one instruction from the pipeline, and then continuing somewhere else). Continuing on Dreamcast PowerVR register names, etc. 20081208 Beginning on a osiop (NCR 53C710 SCSI) device skeleton. 20081210 The SH4 Store Queue memory area is 0x04000000 long, not 0x40. 20081211 OpenBSD/m88k's badaddr() should now be able to detect invalid addresses; memory_rw.c causes exceptions on reads that fail (but no actual address is supplied yet). 20081212 Moving the Dreamcast PowerVR2 DMA handling from dev_dreamcast_g2 to dev_pvr, where it belongs. 20081213 Continuing on SH4 and PowerVR2 DMA. Moving the unsupported guest OSes from guestoses.html to a new page, unsupported.html, for clarity. Continuing on the NCR 53C710 SCSI controller (dev_osiop.c). 20081217 Beginning on implementing the SCRIPTS instruction set for dev_osiop. 20081219 Continuing a little bit on the osiop SCRIPTS ISA. 20081221 Implementing an instruction combination for M88K idle loop detection (works with OpenBSD/mvme88k). Adding a dummy LUNA 88K machine mode (machine_luna88k.c). 20081229 Continuing on the osiop SCRIPTS ISA. 20081231 More progress on dev_osiop.c. 20090101 FINALLY the osiop works well enough to let OpenBSD detect SCSI devices! :-) After some more hacking, everything is finally stable enough to allow OpenBSD/mvme88k to be installed onto a disk image! 20090102 Optimizing the osiop SCSI device a bit; a default scripted install of OpenBSD/mvme88k has dropped from 30 minutes to 10. Fixing a bug which was caused by instructions like subu.co with a destination register of r0 being treated as nop. Various updates to make the source code build better on Linux (Ubuntu 8.10), and with GNU make. ============== RELEASE 0.4.7 ============== 20090103 Merging fixes from the main trunk. 20090122 Merging in fdiv.sss and fadd.dsd from the main trunk. 20090123 NetBSD/hpcmips can now be installed and run using serial console (i.e. without -X), in addition to using the framebuffer. ============== RELEASE 0.4.7.1 ============== 20090215 Updating the guest OS page for HelenOS 0.4.0. 20090513 Fixing the MIPS tne, teq, tge, tgeu, tlt, and tltu instructions to allow non-zero "code" values. Adding a new Linux/Malta "variant 2" entry to the unsupported guest OS page. 20090518 Changing the 8253 interrupt mechanism to assert interrupts regardless of "mode" bits, causing Linux/Malta to get further. Hacking on piix4 a bit to attempt to please Linux/Malta; interrupts are lost. 20090610 Making configuration files work again! (Thanks to Wu Kan for noticing this bug.) 20090611 Documentation updates (NetBSD 5 etc). 20090621 Adding a hack for the pcc2 PSCALEADJ register, making it possible to install and run OpenBSD/mvme88k 4.5. NetBSD/evbmips, /sgimips, and /cobalt 5.0 have been verified to work. ============== RELEASE 0.4.7.2 ==============