On x86 machines U-Boot needs to be added to a large ROM image which is then flashed onto the target board. The ROM has a particular format so it makes sense for U-Boot to build this image automatically. Unfortunately it relies on binary blobs so we cannot require this for the default build as yet.
Create a u-boot.rom output file for this purpose.
Signed-off-by: Simon Glass sjg@chromium.org ---
Makefile | 27 ++++++++++++++++++++++++++- arch/x86/Kconfig | 4 ++++ include/configs/chromebook_link.h | 2 ++ 3 files changed, 32 insertions(+), 1 deletion(-)
diff --git a/Makefile b/Makefile index 9c8a580..86d0510 100644 --- a/Makefile +++ b/Makefile @@ -743,6 +743,9 @@ ALL-$(CONFIG_SPL) += $(CONFIG_SPL_TARGET:"%"=%) endif ALL-$(CONFIG_REMAKE_ELF) += u-boot.elf
+# We can't do this yet due to the need for binary blobs +# ALL-$(CONFIG_X86_RESET_VECTOR) += u-boot.rom + # enable combined SPL/u-boot/dtb rules for tegra ifneq ($(CONFIG_TEGRA),) ifeq ($(CONFIG_SPL),y) @@ -804,7 +807,8 @@ OBJCOPYFLAGS_u-boot.srec := -O srec u-boot.hex u-boot.srec: u-boot FORCE $(call if_changed,objcopy)
-OBJCOPYFLAGS_u-boot.bin := -O binary +OBJCOPYFLAGS_u-boot.bin := -O binary \ + $(if $(CONFIG_X86_RESET_VECTOR),-R .start16 -R .resetvec)
binary_size_check: u-boot.bin FORCE @file_size=$(shell wc -c u-boot.bin | awk '{print $$1}') ; \ @@ -943,6 +947,27 @@ u-boot-nand.gph: u-boot.bin FORCE $(call if_changed,mkimage) @dd if=/dev/zero bs=8 count=1 2>/dev/null >> $@
+# x86 uses a large ROM. We fill it with 0xff, put the 16-bit stuff (including +# reset vector) at the top, Intel ME at the bottom, and U-Boot in the middle. +ifneq ($(CONFIG_X86_RESET_VECTOR),) +rom: u-boot.rom FORCE + +u-boot.rom: u-boot-x86-16bit.bin u-boot-dtb.bin \ + $(srctree)/board/$(BOARDDIR)/descriptor.bin + $(objtree)/tools/ifdtool -c -r $(CONFIG_ROM_SIZE) \ + -D $(srctree)/board/$(BOARDDIR)/descriptor.bin u-boot.tmp + $(objtree)/tools/ifdtool -w \ + $(CONFIG_SYS_TEXT_BASE):$(objtree)/u-boot-dtb.bin u-boot.tmp + $(objtree)/tools/ifdtool -w \ + $(CONFIG_SYS_X86_START16):$(objtree)/u-boot-x86-16bit.bin \ + u-boot.tmp + mv u-boot.tmp $@ + +OBJCOPYFLAGS_u-boot-x86-16bit.bin := -O binary -j .start16 -j .resetvec +u-boot-x86-16bit.bin: u-boot FORCE + $(call if_changed,objcopy) +endif + ifneq ($(CONFIG_SUNXI),) OBJCOPYFLAGS_u-boot-sunxi-with-spl.bin = -I binary -O binary \ --pad-to=$(CONFIG_SPL_PAD_TO) --gap-fill=0xff diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 07ff149..d9ce129 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -34,6 +34,10 @@ config TARGET_CHROMEBOOK_LINK
endchoice
+config ROM_SIZE + hex + default 0x800000 + source "arch/x86/cpu/ivybridge/Kconfig"
source "board/chromebook-x86/coreboot/Kconfig" diff --git a/include/configs/chromebook_link.h b/include/configs/chromebook_link.h index 1d6f55b..5e8a747 100644 --- a/include/configs/chromebook_link.h +++ b/include/configs/chromebook_link.h @@ -18,8 +18,10 @@ #define CONFIG_SYS_CAR_ADDR 0xff7e0000 #define CONFIG_SYS_CAR_SIZE (128 * 1024) #define CONFIG_SYS_MONITOR_LEN (1 << 20) +#define CONFIG_SYS_X86_START16 0xfffff800 #define CONFIG_BOARD_EARLY_INIT_R
+#define CONFIG_X86_RESET_VECTOR #define CONFIG_NR_DRAM_BANKS 8
/*