<HTML ><HEAD ><TITLE >Build options available</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" HREF="t1.html"><LINK REL="PREVIOUS" TITLE="List of supported NICs" HREF="a775.html"><LINK REL="NEXT" TITLE="Security, 1 July 1997" HREF="a784.html"></HEAD ><BODY CLASS="appendix" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" ></TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="a775.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="a784.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="appendix" ><H1 CLASS="appendix" ><A NAME="AEN780" ></A >B. Build options available</H1 ><P > <TABLE BORDER="0" BGCOLOR="#E0E0E0" WIDTH="100%" ><TR ><TD ><PRE CLASS="programlisting" > User interaction options: -DASK_BOOT=n Ask "Boot from (N)etwork ... or (Q)uit? " at startup, timeout after n seconds (0 = no timeout). If unset, boot immediately using the default. -DBOOT_FIRST -DBOOT_SECOND -DBOOT_THIRD On timeout or Return key from previous question, selects the order to try to boot from various devices. (alternatives: BOOT_NIC, BOOT_DISK, BOOT_FLOPPY, BOOT_NOTHING) See etherboot.h for prompt and answer strings. -DBOOT_INDEX The device to boot from 0 == any device. 1 == The first nic found. 2 == The second nic found ... BOOT_INDEX only applies to the BOOT_FIRST. BOOT_SECOND and BOOT_THIRD search through all of the boot devices. -DBAR_PROGRESS Use rotating bar instead of sequential dots to indicate an IP packet transmitted. Boot order options: -DBOOT_CLASS_FIRST -DBOOT_CLASS_SECOND -DBOOT_CLASS_THIRD Select the priority of the boot classes Valid values are: BOOT_NIC BOOT_DISK BOOT_FLOPPY Boot autoconfiguration protocol options: -DNO_DHCP_SUPPORT Use BOOTP instead of DHCP. -DRARP_NOT_BOOTP Use RARP instead of BOOTP/DHCP. -DREQUIRE_VCI_ETHERBOOT Require an encapsulated Vendor Class Identifier of "Etherboot" in the DHCP reply Requires DHCP support. -DALLOW_ONLY_ENCAPSULATED Ignore Etherboot-specific options that are not within the Etherboot encapsulated options field. This option should be enabled unless you have a legacy DHCP server configuration from the bad old days before the use of encapsulated Etherboot options. -DDEFAULT_BOOTFILE="default_bootfile_name" Define a default bootfile for the case where your DHCP server does not provide the information. Example: -DDEFAULT_BOOTFILE="tftp:///tftpboot/kernel" If you do not specify this option, then DHCP offers that do not specify bootfiles will be ignored. NIC tuning parameters: -DALLMULTI Turns on multicast reception in the NICs. Boot tuning parameters: -DCONGESTED Turns on packet retransmission. Use it on a congested network, where the normal operation can't boot the image. -DBACKOFF_LIMIT Sets the maximum RFC951 backoff exponent to n. Do not set this unreasonably low, because on networks with many machines they can saturate the link (the delay corresponding to the exponent is a random time in the range 0..3.5*2^n seconds). Use 5 for a VERY small network (max. 2 minutes delay), 7 for a medium sized network (max. 7.5 minutes delay) or 10 for a really huge network with many clients, frequent congestions (max. 1 hour delay). On average the delay time will be half the maximum value. If in doubt about the consequences, use a larger value. Also keep in mind that the number of retransmissions is not changed by this setting, so the default of 20 may no longer be appropriate. You might need to set MAX_ARP_RETRIES, MAX_BOOTP_RETRIES, MAX_TFTP_RETRIES and MAX_RPC_RETRIES to a larger value. -DTIMEOUT=n Use with care!! See above. Sets the base of RFC2131 sleep interval to n. This can be used with -DBACKOFF_LIMIT=0 to get a small and constant (predictable) retry interval for embedded devices. This is to achieve short boot delays if both the DHCP Server and the embedded device will be powered on the same time. Otherwise if the DHCP server is ready the client could sleep the next exponentially timeout, e.g. 70 seconds or more. This is not what you want. n should be a multiple of TICKS_PER_SEC (18). Boot device options: -DCAN_BOOT_DISK Can boot from floppy/hd if bootimage matches the pattern "/dev/fhsd*". -DTRY_FLOPPY_FIRST If > 0, tries that many times to read the boot sector from a floppy drive before booting from ROM. If successful, does a local boot. It assumes the floppy is bootable. Requires -DCAN_BOOT_DISK. -DEMERGENCYDISKBOOT If no BOOTP server can be found, then boot from local disk. The accessibility of the TFTP server has no effect, though! So configure your BOOTP server properly. You should probably reduce MAX_BOOTP_RETRIES to a small number like 3. Boot image options: -DTAGGED_IMAGE Add tagged image kernel boot support (recommended). -DAOUT_IMAGE Add a.out kernel boot support (generic). -DELF_IMAGE Add generic ELF kernel boot support (recommended). -DEL64F_IMAGE Add generic ELF64 kernel boot support (useful for > 4GB disks). -DWINCE_IMAGE Add the ability to boot WINCE.... now only sis630 OK! -DFREEBSD_PXEEMU Add the ability to boot PXE images... only FreeBSD supported -DX86_BOOTSECTOR_IMAGE Add the ability to boot 512 byte x86 boot sectors -DIMAGE_MULTIBOOT Add Multiboot image support (currently only for ELF images). Without this, generic ELF support is selected. -DIMAGE_FREEBSD Add FreeBSD image loading support (requires at least -DAOUT_IMAGE and/or -DELF_IMAGE). -DFREEBSD_KERNEL_ENV Pass in FreeBSD kernel environment -DAOUT_LYNX_KDI Add Lynx a.out KDI support -DMULTICAST_LEVEL1 Support for sending multicast packets -DMULTICAST_LEVEL2 Support for receiving multicast packets -DDOWNLOAD_PROTO_TFTP If defined, boots by TFTP (recommended). -DDOWNLOAD_PROTO_NFS If defined, boots from a NFS mount and disables TFTP loading. Default is DOWNLOAD_PROTO_TFTP if neither is defined. -DDOWNLOAD_PROTO_SLAM If defined, boots via Scalable Local Area Multicast. -DDOWNLOAD_PROTO_TFTM If defined, enables booting via TFTP Multicast mode. -DSAFEBOOTMODE Enables "Safe Boot Mode": Only boot images after verification with public-key-cryptography, this is WORK IN PROGRESS must be or'ed from one publickey storage method and one nbi-digest method value 0 = store key in code (safeboot_key.h) 1 = store key in ROM somewhere else (to do) 0 = crypted digest in first 512 bytes - as bytes 446...509 (compatible with most NBIs!?) 16 = crypted digest as ELF block (to do... Eric?) So for now, only valid mode is "0" Console options: -DCONSOLE_FIRMWARE Set for firmware/BIOS provided (default if nothing else is set). Normally this is shows up on your CRT. -DCONSOLE_SERIAL Set for serial console. -DCONSOLE_DUAL Both of the above -DCOMCONSOLE Set port, e.g. 0x3F8. -DCONSPEED Set speed, e.g. 57600. -DCOMPARM Set Line Control Register value for data bits, stop bits and parity. See a National Semiconditor 8250/ 16450/16550 data sheet for bit meanings. If undefined, defaults to 0x03 = 8N1. -DCOMPRESERVE Ignore COMSPEED and COMPARAM and instead preserve the com port parameters from the previous user of the com port. Examples of previous user are a BIOS that implements console redirection, lilo and LinuxBIOS. This makes it trivial to keep the serial port speed setting in sync between multiple users. You set the speed in the first user and the rest follow along. Obscure options you probably don't need to touch: -DPOWERSAVE Halt the processor when waiting for keyboard input which saves power while waiting for user interaction. Good for compute clusters and VMware emulation. But may not work for all CPUs. -DRELOCATE After starting etherboot relocate to the top of memory. This allows loading fairly arbitrary rom images. This doesn't work with a couple of drivers, e.g. lance. BUS options: -DCONFIG_PCI Include support for devices using the pci bus. -DCONFIG_ISA Include support for devices using isa bus. </PRE ></TD ></TR ></TABLE > </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="a775.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="t1.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="a784.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >List of supported NICs</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" > </TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Security, 1 July 1997</TD ></TR ></TABLE ></DIV ></BODY ></HTML >
