Re: [coreboot] About grub.cfg——Building coreboot with grub2 payload

[Cui Lei]

Thank you for your help, I have changed my operation, but my coreboot  
still step to grub.

/************************************* LOG 
*********************************************************/
Check fallback/payload
Got a payload
Loading segment from rom address 0xfff29ff8
   data (compression=1)
   New segment dstaddr 0x8200 memsize 0xd8b8 srcaddr 0xfff2a04c filesize 
0x3a69
   (cleaned up) New segment addr 0x8200 size 0xd8b8 offset 0xfff2a04c 
filesize 0x3a69
Loading segment from rom address 0xfff2a014
   data (compression=1)
   New segment dstaddr 0x15ab8 memsize 0x69914 srcaddr 0xfff2dab5 
filesize 0x1d0c0
   (cleaned up) New segment addr 0x15ab8 size 0x69914 offset 0xfff2dab5 
filesize 0x1d0c0
Loading segment from rom address 0xfff2a030
   Entry Point 0x00008200
Loading Segment: addr: 0x0000000000008200 memsz: 0x000000000000d8b8 
filesz: 0x0000000000003a69
lb: [0x0000000000100000, 0x0000000000164000)
Post relocation: addr: 0x0000000000008200 memsz: 0x000000000000d8b8 
filesz: 0x0000000000003a69
using LZMA
[ 0x00008200, 0000e51b, 0x00015ab8) <- fff2a04c
Clearing Segment: addr: 0x000000000000e51b memsz: 0x000000000000759d
dest 00008200, end 00015ab8, bouncebuffer 7fe28000
Loading Segment: addr: 0x0000000000015ab8 memsz: 0x0000000000069914 
filesz: 0x000000000001d0c0
lb: [0x0000000000100000, 0x0000000000164000)
Post relocation: addr: 0x0000000000015ab8 memsz: 0x0000000000069914 
filesz: 0x000000000001d0c0
using LZMA
[ 0x00015ab8, 0007f3cc, 0x0007f3cc) <- fff2dab5
dest 00015ab8, end 0007f3cc, bouncebuffer 7fe28000
Loaded segments
Jumping to boot code at 8200
entry    = 0x00008200
lb_start = 0x00100000
lb_size  = 0x00064000
adjust   = 0x7fd8c000
buffer   = 0x7fe28000
      elf_boot_notes = 0x0011622c
adjusted_boot_notes = 0x7fea222c

/****************************************************************************************************/
I have added "grub_printf("Enter grub_main()!\n")" in the top of 
grub_main()(defined in grub-core/kern/main.c). Unfortunately, nothing 
can be printed out when booting. I don't know it is stopped before grub 
C code or I don't open some grub2 option which close the standard output 
mode.
> 2011/5/31 Cui Lei:
> > I am working hard at building coreboot with grub2 payload. Now  I can build
> > a grub2 payload as follow:
> > 1: Download the lastest grub2 source code.
> > 2: ./autogen.sh
> >      ./configure --with-platform=coreboot
> >       make
> > 3: Use grub-mkimage to generate a "payload.elf", detail:
> >      ./grub-mkimage -d . -O i386-coreboot -o ../coreboot-v4/payload.elf
> > --prefix='/boot/grub2'
> >        memdisk cpio -m ../memdisk.tar
> >  Accoding the coreboot website(http://www.coreboot.org/Talk:GRUB2),
> >
> > memdisk is a virtual disk
> >      in grub image and it is suggested that grub.cfg is contained in a
> > memdisk image. So I made
> >      folders boot/grub2 in my work folder and add a new grub.cfg and some
> > modules(such as
> >      memdisk.mod cpio.mod ...) into the boot/grub2, then tar boot/grub2 to
> > memdisk.tar(according
> >      to the website tar can be used to build a memdisk image).
> >
> > Problems:
> >      1: I don't know wether grub2 can found my grub.cfg ,if I set  "
> > --prefix='/boot/grub2' " ?
> >          On the coreboot website,a sample is  --prefix='(ata0)/boot/grub2'. I
> > think the ata0 is hard disk.
> >          but I use the memdisk image, what should I do ?
>
> I use this to create a custom grub2 efi app with memdisk embedded -
>
> /bin/grub-mkimage --directory=/usr/lib/grub/x86_64-efi
> --memdisk="${memdisk_64_img}" --prefix='(memdisk)/efi/grub2'
> --format=x86_64-efi --compression=xz
> --output="${grub2_efi_mp}/efi/boot/bootx64.efi" ${GRUB2_MODULES}
>
> Hope this helps.
> >  2: I want my grub.cfg in memdisk to load the grub.cfg from my hard disk.
> >
> > Because I have install the
> >          ubuntu11.04 on my hard disk, a grub.cfg file should be in the
> > /boot/grub. So my grub.cfg just like
> >          this:
> >                  search -f -s /boot/grub/grub.cfg
> >                  configfile /boot/grub/grub.cfg
> >      Is this practicable?
>
> Make it
>
> search --file --no-floppy --set=root /boot/grub/grub.cfg
>   configfile (${root})/boot/grub/grub.cfg
> >  3: I want the gurb can boot into the grub-shell, how to ?
>
> I can't understand the question. You want grub to boot into
> grub-shell? Don't create a ${prefix}/grub.cfg file.
> > BRs,
> >
> > Rock.C
>
> Regards.
>
> Keshav