[SeaBIOS] Problems with Linux payload

[Kevin O'Connor]

On Fri, Aug 15, 2014 at 03:38:30PM -0700, Curt Brune wrote:
> Hello -
> 
> First time poster, so take it easy on me :)
> 
> This is a great project -- I was able to get a kvm+coreboot+SeaBIOS
> environment going pretty easily.  I started with the master branch of
> coreboot and went from there.
> 
> I am having a problem trying to load a Linux kernel+initramfs payload
> from SeaBIOS.
> 
> I can successfully boot the same kernel+initramfs straight from
> coreboot (without SeaBIOS) as a payload.  Also I can boot the same
> kernel+initramfs from the hard disk using SeaBIOS when GRUB is
> installed on the hard disk.  So I'm pretty sure my kernel+initramfs is
> OK.
> 
> My rom looks like this:
> 
>   coreboot.rom: 16384 kB, bootblocksize 1416, romsize 16777216, offset 0x0
>   alignment: 64 bytes
>    
>   Name                           Offset     Type         Size
>   cmos_layout.bin                0x0        cmos_layout  1160
>   fallback/romstage              0x4c0      stage        19569
>   fallback/ramstage              0x5180     stage        55849
>   config                         0x12c00    raw          3132
>   fallback/payload               0x13880    payload      57928
>   vgaroms/sgabios.bin            0x21b00    raw          4096
>   etc/boot-menu-wait             0x22b40    raw          8
>   etc/boot-menu-key              0x22b80    raw          8
>   etc/boot-menu-message          0x22bc0    raw          34
>   etc/screen-and-debug           0x22c40    raw          8
>   img/LINUX                      0x22c80    payload      8474826
>   (empty)                        0x837d80   null         8158360
> 
> When I break into SeaBIOS during the boot I get this menu:
> 
>   Select boot device:
>    
>   1. DVD/CD [ata1-0: QEMU DVD-ROM ATAPI-4 DVD/CD]
>   2. Virtio disk PCI:0:4
>   3. Legacy option rom
>   4. iPXE (PCI 00:03.0)
>   5. Payload [LINUX]
> 
> When I select "5" I get this:
> 
>   Searching bootorder for: HALT
>   drive 0x000f4d50: PCHS=16383/16/63 translation=lba LCHS=1024/255/63 s=33554432
>   Running option rom at cc80:0003
>   Booting from CBFS...
>   Run img/LINUX
>   Calling addr 0x00040000
>   ...
>   [System Reboots]
> 
> I turned on some debug in coreboot and SeaBIOS and compared the
> successful boot (coreboot+Linux) to the unsuccessful boot
> (coreboot+SeaBIOS+Linux).  I compared the segment offsets and sizes
> between the two cases and they were the same.  Also the 0x00040000
> entry point was the same.

Nothing from your description sounds like it should cause a problem.
I recommend increasing the SeaBIOS debug level to 8 and posting the
full log.

-Kevin