[coreboot] noob question
Johan S
johanpsz at yahoo.fr
Mon Aug 10 10:54:38 CET 2015
Hi there,
i m trying to understand few mechanism in coreboot can someone help ?
I grabbed the git tree , made crossgcc , made a biosfile tested succesfully within qemu.
In the menuconfig few options are quite confusing especially looking at the vgabios .
I choose the oldest qemu model for emulation , enabled the vgabios , kept the vesa framebuffer
did the edid patch to bypasse vbe mod multiple ...
but i can't get my splashscreen :-/
johan at debian:~/coreboot$ file build/coreboot.rom ^C
johan at debian:~/coreboot$ build/cbfstool build/coreboot.rom print
coreboot.rom: 4096 kB, bootblocksize 928, romsize 4194304, offset 0x3c0000
alignment: 64 bytes, architecture: x86
Name Offset Type Size
bootsplash.jpg 0x3c0000 bootsplash 50937
cmos_layout.bin 0x3cc740 cmos_layout 808
fallback/dsdt.aml 0x3ccac0 raw 4000
config 0x3cdac0 raw 3459
revision 0x3ce880 raw 569
(empty) 0x3ceb00 null 5208
fallback/romstage 0x3cff80 stage 11468
fallback/ramstage 0x3d2cc0 stage 46007
fallback/payload 0x3de0c0 payload 55823
vgaroms/seavgabios.bin 0x3ebb40 raw 35840
(empty) 0x3f4780 null 46232
I read somewhere that in vgabios i should be able to see :
under "VGA ROM ---> VGA Hardware Type" select "coreboot linear framebuffer"
Anyway i can get my os to boot , i can pass the F12 boot option , i can pass openfirmware but ...
i can't even understand why with all requirement in the biosfile i could't get 1024*768
jpeg displayed with vesa enabled ...
I 'm lost
Thanks
--
Johan S <johanpsz at yahoo.fr>
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