Build etherboot ROM from source.

We now include the source for Etherboot (5.4.2, obtained from git)
rather than a pre-built ROM.  This gives better traceability and GPL
licence compliance.  See tools/firmware/etherboot/README for details.

Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>

.hgignore

@@ -258,3 +258,5 @@
 ^unmodified_drivers/linux-2.6/.*\.ko$
 ^unmodified_drivers/linux-2.6/.*\.mod\.c$
 ^LibVNCServer.*
+^tools/firmware/etherboot/etherboot-build
+^tools/firmware/etherboot/etherboot-5.*

tools/firmware/Makefile

@@ -11,6 +11,7 @@ SUBDIRS += rombios rombios/32bit
 SUBDIRS += vgabios
 SUBDIRS += vmxassist
 SUBDIRS += extboot
+SUBDIRS += etherboot
 SUBDIRS += hvmloader
 
 .PHONY: all

tools/firmware/etherboot/Config

@@ -0,0 +1,13 @@
+CFLAGS+=	-UASK_BOOT	-UBOOT_FIRST
+CFLAGS+=	-DASK_BOOT=-1	-DBOOT_FIRST=BOOT_NIC
+
+CFLAGS+=	-UEXIT_ON_FILE_LOAD_ERROR
+CFLAGS+=	-DEXIT_ON_FILE_LOAD_ERROR
+
+CFLAGS+=	-UEXIT_IF_NO_OFFER
+CFLAGS+=	-DEXIT_IF_NO_OFFER
+
+CFLAGS+=	-UPXE_DHCP_STRICT
+CFLAGS+=	-DPXE_DHCP_STRICT
+
+# Also, the Makefile arranges for us to use GCC 3

tools/firmware/etherboot/Makefile

@@ -0,0 +1,27 @@
+
+EB_VERSION=5.4.2
+
+D=etherboot-$(EB_VERSION)
+T=etherboot-$(EB_VERSION).tar.gz
+E=etherboot-build
+
+TARGETS=eb-rtl8139.zrom.h
+
+all: $(TARGETS)
+
+eb-%.zrom.h: $E/src/Config
+	$(MAKE) -C $E/src bin/$*.zrom
+	../hvmloader/mkhex etherboot <$E/src/bin/$*.zrom >$@.new
+	mv -f $@.new $@
+
+$E/src/Config:	$T Config
+	rm -rf $D $E
+	tar zxf $T
+	cat Config >>$D/src/Config
+	./find-gcc-3 >>$D/src/Config
+	mv $D $E
+
+clean:
+	rm -rf $D $E *.zrom.h *~
+
+.PHONY: all clean

tools/firmware/etherboot/README

@@ -1,11 +1,28 @@
 
-This is an Etherboot option ROM for the rtl8139 NIC.  It has a few
-non-standard settings, most to do with timeouts and when to give up,
-and for stricter DHCP spec compliance.
+This directory builds Etherboot option ROMs from the etherboot source
+tarball.  (We provide this tarball in our source so that we do not
+distribute binaries without source code, as that would mean we weren't
+sure what the binaries are and in any case would be forbidden by the
+licensing of Etherboot.)
 
-Rom-o-matic.net will provide this image at the following URL:
+We make a few non-standard settings, most to do with timeouts and when
+to give up, and for stricter DHCP spec compliance.
+
+----------------------------------------
+
+Since Etherboot upstream do not appear to distribute tarballs, we
+generated one ourselves with the following runes:
+
+ git clone git://git.etherboot.org/scm/etherboot.git
+ cd etherboot
+ git archive --format=tar --prefix=etherboot-5.4.2/ Eb.5.4.2 | gzip >../etherboot-5.4.2.tar.gz
+
+----------------------------------------
+
+Previously, an image from Rom-o-matic.net was provided here, fetched
+from the following URL:
 
 http://rom-o-matic.net/5.4.3/build.php?version=5.4.3&F=ignore&nic=rtl8139%3Artl8139+--+%5B0x10ec%2C0x8139%5D&ofmt=Binary+ROM+Image%28.zrom%29&arch=i386&ASK_BOOT=-1&BOOT_FIRST=BOOT_NIC&BOOT_SECOND=BOOT_NOTHING&BOOT_THIRD=BOOT_NOTHING&BOOT_INDEX=0&STATIC_CLIENT_IP=&STATIC_SUBNET_MASK=&STATIC_SERVER_IP=&STATIC_GATEWAY_IP=&STATIC_BOOTFILE=&EXIT_ON_FILE_LOAD_ERROR=on&DHCP_CLIENT_ID=&DHCP_CLIENT_ID_LEN=&DHCP_CLIENT_ID_TYPE=&DHCP_USER_CLASS=&DHCP_USER_CLASS_LEN=&ALLOW_ONLY_ENCAPSULATED=on&DEFAULT_BOOTFILE=&CONGESTED=on&BACKOFF_LIMIT=7&TIMEOUT=180&TRY_FLOPPY_FIRST=0&EXIT_IF_NO_OFFER=on&TAGGED_IMAGE=on&ELF_IMAGE=on&PXE_IMAGE=on&DOWNLOAD_PROTO_TFTP=on&COMCONSOLE=0x3F8&CONSPEED=9600&COMPARM=0x03&PXE_EXPORT=on&CONFIG_PCI=on&CONFIG_ISA=on&BUILD_ID=&PCBIOS=on&PXE_DHCP_STRICT=on&A=Get+ROM
 
-and the mkhex script in tools/firmware/hvmloader will make the header 
-file from the downloaded image.
+The mkhex script in tools/firmware/hvmloader will make the header file
+from the downloaded image.

tools/firmware/etherboot/find-gcc-3

@@ -0,0 +1,10 @@
+#!/bin/sh
+set -e
+for gcc in gcc-3.4 gcc34 gcc-3.3 gcc33 gcc-3.2 gcc32; do
+	if type -p $gcc >&2; then
+		echo "CC=$gcc"; exit 0
+	fi
+done
+
+echo >&2 'We need GCC 3 for Etherboot.'
+false