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Diffstat (limited to 'doc/README.x86')
| -rw-r--r-- | doc/README.x86 | 97 |
1 files changed, 0 insertions, 97 deletions
diff --git a/doc/README.x86 b/doc/README.x86 index a8ad95604a..2374be9eb3 100644 --- a/doc/README.x86 +++ b/doc/README.x86 @@ -65,103 +65,6 @@ Both tell the Makefile to build u-boot.rom as a target. --- -Chromebook Samus (2015 Pixel) instructions for bare mode: - -First, you need the following binary blobs: - -* descriptor.bin - Intel flash descriptor -* me.bin - Intel Management Engine -* mrc.bin - Memory Reference Code, which sets up SDRAM -* refcode.elf - Additional Reference code -* vga.bin - video ROM, which sets up the display - -If you have a samus you can obtain them from your flash, for example, in -developer mode on the Chromebook (use Ctrl-Alt-F2 to obtain a terminal and -log in as 'root'): - - cd /tmp - flashrom -w samus.bin - scp samus.bin username@ip_address:/path/to/somewhere - -If not see the coreboot tree [4] where you can use: - - bash crosfirmware.sh samus - -to get the image. There is also an 'extract_blobs.sh' scripts that you can use -on the 'coreboot-Google_Samus.*' file to short-circuit some of the below. - -Then 'ifdtool -x samus.bin' on your development machine will produce: - - flashregion_0_flashdescriptor.bin - flashregion_1_bios.bin - flashregion_2_intel_me.bin - -Rename flashregion_0_flashdescriptor.bin to descriptor.bin -Rename flashregion_2_intel_me.bin to me.bin -You can ignore flashregion_1_bios.bin - it is not used. - -To get the rest, use 'cbfstool samus.bin print': - -samus.bin: 8192 kB, bootblocksize 2864, romsize 8388608, offset 0x700000 -alignment: 64 bytes, architecture: x86 - -Name Offset Type Size -cmos_layout.bin 0x700000 cmos_layout 1164 -pci8086,0406.rom 0x7004c0 optionrom 65536 -spd.bin 0x710500 (unknown) 4096 -cpu_microcode_blob.bin 0x711540 microcode 70720 -fallback/romstage 0x722a00 stage 54210 -fallback/ramstage 0x72fe00 stage 96382 -config 0x7476c0 raw 6075 -fallback/vboot 0x748ec0 stage 15980 -fallback/refcode 0x74cd80 stage 75578 -fallback/payload 0x75f500 payload 62878 -u-boot.dtb 0x76eb00 (unknown) 5318 -(empty) 0x770000 null 196504 -mrc.bin 0x79ffc0 (unknown) 222876 -(empty) 0x7d66c0 null 167320 - -You can extract what you need: - - cbfstool samus.bin extract -n pci8086,0406.rom -f vga.bin - cbfstool samus.bin extract -n fallback/refcode -f refcode.rmod - cbfstool samus.bin extract -n mrc.bin -f mrc.bin - cbfstool samus.bin extract -n fallback/refcode -f refcode.bin -U - -Note that the -U flag is only supported by the latest cbfstool. It unpacks -and decompresses the stage to produce a coreboot rmodule. This is a simple -representation of an ELF file. You need the patch "Support decoding a stage -with compression". - -Put all 5 files into board/google/chromebook_samus. - -Now you can build U-Boot and obtain u-boot.rom: - -$ make chromebook_link_defconfig -$ make all - -If you are using em100, then this command will flash write -Boot: - - em100 -s -d filename.rom -c W25Q64CV -r - -Flash map for samus / broadwell: - - fffff800 SYS_X86_START16 - ffff0000 RESET_SEG_START - fffd8000 TPL_TEXT_BASE - fffa0000 X86_MRC_ADDR - fff90000 VGA_BIOS_ADDR - ffed0000 SYS_TEXT_BASE - ffea0000 X86_REFCODE_ADDR - ffe70000 SPL_TEXT_BASE - ffbf8000 CONFIG_ENV_OFFSET (environemnt offset) - ffbe0000 rw-mrc-cache (Memory-reference-code cache) - ffa00000 <spare> - ff801000 intel-me (address set by descriptor.bin) - ff800000 intel-descriptor - ---- - QEMU x86 target instructions for bare mode: To build u-boot.rom for QEMU x86 targets, just simply run |