Nico Huber (nico.huber@secunet.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3524
-gerrit
commit 24598d65ea027b58b83f7517204ade85eb863a8e Author: Nico Huber nico.huber@secunet.com Date: Wed Jun 19 16:16:05 2013 +0200
sandybridge: Make build possible without descriptor.bin
On newer Intel systems, the flash ROM is shared between the host processor (BIOS), it's Management Engine (ME) and an integrated ethernet controller (GbE). The layout of the flash ROM (and other information) is kept in the so called Intel Firmware Descriptor (IFD). If we only want to build coreboot to update the BIOS section, all we need is the flash layout.
This patch adds the option to specify the flash layout in the mainboard's Kconfig, and thus, to build without the real IFD. However, with such a build, one has to make sure that the IFD section on the flash ROM won't be written over (nor any other section that hasn't been included by coreboot). A patch to write selected sections of a flash ROM with IFD has been sent to the flashrom mailing list [1].
[1] http://www.flashrom.org/pipermail/flashrom/2013-June/011083.html
Change-Id: Ia23e439a00a197fb54852263f8e206f16c3e8851 Signed-off-by: Nico Huber nico.huber@secunet.com --- Makefile.inc | 8 ++++- src/southbridge/intel/bd82x6x/Kconfig | 51 +++++++++++++++++++++++++++--- src/southbridge/intel/bd82x6x/Makefile.inc | 24 ++++++++++++-- 3 files changed, 75 insertions(+), 8 deletions(-)
diff --git a/Makefile.inc b/Makefile.inc index da350d1..69ad3a1 100644 --- a/Makefile.inc +++ b/Makefile.inc @@ -212,7 +212,8 @@ CFLAGS += -Werror endif CFLAGS += -fno-common -ffreestanding -fno-builtin -fomit-frame-pointer
-additional-dirs := $(objutil)/cbfstool $(objutil)/romcc $(objutil)/ifdtool $(objutil)/options +additional-dirs := $(objutil)/cbfstool $(objutil)/romcc $(objutil)/ifdtool \ + $(objutil)/ifdfake $(objutil)/options
####################################################################### # generate build support files @@ -275,6 +276,11 @@ $(IFDTOOL): $(top)/util/ifdtool/ifdtool.c @printf " HOSTCC $(subst $(obj)/,,$(@))\n" $(HOSTCC) $(HOSTCFLAGS) -o $@ $<
+IFDFAKE:=$(objutil)/ifdfake/ifdfake +$(IFDFAKE): $(top)/util/ifdfake/ifdfake.c + @printf " HOSTCC $(subst $(obj)/,,$(@))\n" + $(HOSTCC) $(HOSTCFLAGS) -o $@ $< + ####################################################################### # needed objects that every mainboard uses # Creation of these is architecture and mainboard independent diff --git a/src/southbridge/intel/bd82x6x/Kconfig b/src/southbridge/intel/bd82x6x/Kconfig index 1d544de..0be875e 100644 --- a/src/southbridge/intel/bd82x6x/Kconfig +++ b/src/southbridge/intel/bd82x6x/Kconfig @@ -59,6 +59,52 @@ config HPET_MIN_TICKS hex default 0x80
+config HAVE_IFD_BIN + bool + default y + +config BUILD_WITH_FAKE_IFD + bool "Build with a fake IFD" + default y if !HAVE_IFD_BIN + help + If you don't have an Intel Firmware Descriptor (ifd.bin) for your + board, you can select this option and coreboot will build without it. + Though, the resulting coreboot.rom will not contain all parts required + to get coreboot running on your board. You can however write only the + BIOS section to your board's flash ROM and keep the other sections + untouched. Unfortunately the current version of flashrom doesn't + support this yet. But there is a patch pending [1]. + + WARNING: Never write a complete coreboot.rom to your flash ROM if it + was built with a fake IFD. It just won't work. + + [1] http://www.flashrom.org/pipermail/flashrom/2013-June/011083.html + +config IFD_BIOS_SECTION + depends on BUILD_WITH_FAKE_IFD + string + default "" + +config IFD_ME_SECTION + depends on BUILD_WITH_FAKE_IFD + string + default "" + +config IFD_GBE_SECTION + depends on BUILD_WITH_FAKE_IFD + string + default "" + +config IFD_PLATFORM_SECTION + depends on BUILD_WITH_FAKE_IFD + string + default "" + +config IFD_BIN_PATH + string "Path to intel firmware descriptor" + depends on !BUILD_WITH_FAKE_IFD + default "3rdparty/mainboard/$(MAINBOARDDIR)/descriptor.bin" + config HAVE_GBE_BIN bool "Add gigabit ethernet firmware" default n @@ -88,12 +134,9 @@ config ME_BIN_PATH depends on HAVE_ME_BIN default "3rdparty/mainboard/$(MAINBOARDDIR)/me.bin"
-config IFD_BIN_PATH - string "Path to intel firmware descriptor" - default "3rdparty/mainboard/$(MAINBOARDDIR)/descriptor.bin" - config LOCK_MANAGEMENT_ENGINE bool "Lock Management Engine section" + depends on !BUILD_WITH_FAKE_IFD default n help The Intel Management Engine supports preventing write accesses diff --git a/src/southbridge/intel/bd82x6x/Makefile.inc b/src/southbridge/intel/bd82x6x/Makefile.inc index 73948d2..c717586 100644 --- a/src/southbridge/intel/bd82x6x/Makefile.inc +++ b/src/southbridge/intel/bd82x6x/Makefile.inc @@ -52,9 +52,27 @@ smm-$(CONFIG_USBDEBUG) += usb_debug.c romstage-y += reset.c romstage-y += early_spi.c
-bd82x6x_add_me: $(obj)/coreboot.pre $(IFDTOOL) +ifeq ($(CONFIG_BUILD_WITH_FAKE_IFD),y) +IFD_BIN_PATH := $(objgenerated)/ifdfake.bin +IFD_SECTIONS := $(addprefix -b ,$(CONFIG_IFD_BIOS_SECTION:"%"=%)) \ + $(addprefix -m ,$(CONFIG_IFD_ME_SECTION:"%"=%)) \ + $(addprefix -g ,$(CONFIG_IFD_GBE_SECTION:"%"=%)) \ + $(addprefix -p ,$(CONFIG_IFD_PLATFORM_SECTION:"%"=%)) +else +IFD_BIN_PATH := $(CONFIG_IFD_BIN_PATH) +endif + +bd82x6x_add_me: $(obj)/coreboot.pre $(IFDTOOL) $(IFDFAKE) +ifeq ($(CONFIG_BUILD_WITH_FAKE_IFD),y) + printf "\n** WARNING **\n" + printf "Coreboot will be built with a fake Intel Firmware Descriptor (IFD).\n" + printf "Never write a complete coreboot.rom with a fake IFD to your board's\n" + printf "flash ROM! Make sure that you only write valid flash regions.\n\n" + printf " IFDFAKE Building a fake Intel Firmware Descriptor\n" + $(IFDFAKE) $(IFD_SECTIONS) $(IFD_BIN_PATH) +endif printf " DD Adding Intel Firmware Descriptor\n" - dd if=$(CONFIG_IFD_BIN_PATH) \ + dd if=$(IFD_BIN_PATH) \ of=$(obj)/coreboot.pre conv=notrunc >/dev/null 2>&1 ifeq ($(CONFIG_HAVE_ME_BIN),y) printf " IFDTOOL me.bin -> coreboot.pre\n" @@ -74,7 +92,7 @@ ifeq ($(CONFIG_LOCK_MANAGEMENT_ENGINE),y) printf " IFDTOOL Locking Management Engine\n" $(objutil)/ifdtool/ifdtool -l $(obj)/coreboot.pre mv $(obj)/coreboot.pre.new $(obj)/coreboot.pre -else +else ifneq ($(CONFIG_BUILD_WITH_FAKE_IFD),y) printf " IFDTOOL Unlocking Management Engine\n" $(objutil)/ifdtool/ifdtool -u $(obj)/coreboot.pre mv $(obj)/coreboot.pre.new $(obj)/coreboot.pre