From eea0f11278d9104960dfb1fbfcddfb796a3e0bb5 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Tue, 27 Jan 2015 22:13:32 -0700 Subject: x86: Add an option to enabling building a ROM file 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 Reviewed-by: Bin Meng --- doc/README.x86 | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) (limited to 'doc') diff --git a/doc/README.x86 b/doc/README.x86 index 7df8cc516a..ddfd75e1cd 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. -- cgit v1.2.1