Rather than requiring the Makefile to be modified, provide a build option to enable the ROM to be built.
We cannot do this by default since it requires binary blobs. Without these the build will fail.
Signed-off-by: Simon Glass sjg@chromium.org ---
Changes in v2: - Fix README typos
Makefile | 5 +++-- doc/README.x86 | 10 ++++++---- 2 files changed, 9 insertions(+), 6 deletions(-)
diff --git a/Makefile b/Makefile index a876f1f..c6e4ad1 100644 --- a/Makefile +++ b/Makefile @@ -729,8 +729,9 @@ 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-$(CONFIG_X86_RESET_VECTOR) += u-boot.rom +ifneq ($(BUILD_ROM),) +ALL-$(CONFIG_X86_RESET_VECTOR) += u-boot.rom +endif
# enable combined SPL/u-boot/dtb rules for tegra ifneq ($(CONFIG_TEGRA),) diff --git a/doc/README.x86 b/doc/README.x86 index 7df8cc5..ddfd75e 100644 --- a/doc/README.x86 +++ b/doc/README.x86 @@ -51,9 +51,11 @@ Building ROM version of U-Boot (hereafter referred to as u-boot.rom) is a little bit tricky, as generally it requires several binary blobs which are not shipped in the U-Boot source tree. Due to this reason, the u-boot.rom build is not turned on by default in the U-Boot source tree. Firstly, you need turn it -on by uncommenting the following line in the main U-Boot Makefile: +on by enabling the ROM build:
-# ALL-$(CONFIG_X86_RESET_VECTOR) += u-boot.rom +$ export BUILD_ROM=y + +This tells the Makefile to build u-boot.rom as a target.
Link-specific instructions:
@@ -126,11 +128,11 @@ Make sure 0x1110000 matches CONFIG_SYS_TEXT_BASE and 0x1110015 matches the symbol address of _start (in arch/x86/cpu/start.S).
If you want to use ELF as the coreboot payload, change U-Boot configuration to -use CONFIG_OF_EMBED. +use CONFIG_OF_EMBED instead of CONFIG_OF_SEPARATE.
CPU Microcode ------------- -Modern CPU usually requires a special bit stream called microcode [5] to be +Modern CPUs usually require a special bit stream called microcode [5] to be loaded on the processor after power up in order to function properly. U-Boot has already integrated these as hex dumps in the source tree.