[coreboot] Help required to boot DUET (Seabios floppy mechanism)

[Scott Duplichan]

Anthony Ross wrote:

]Dear Folks
]
]Thanks for the suggestions. Well this is how I debug 
]
]qemu-system-x86_64 -no-kvm -net none -bios build/coreboot.rom
] -s -global isa-serial.iobase=0x3f8 -serial file:/new/serial8.log
] -monitor stdio
]
] (Don' t consider the 8)
]
]
]Please correct me if Im mistaken
]
]By the way by freeze I meant is that the DUET BIOS page gets displayed but it does not ]allow to select anything. If I use the down
arrow key there is no effect.......So still ]facing the same problem.
]
]
]Any suggestions...

UEFI is not easy to debug. I do see that both PS/2
and USB keyboard support module load messages in your log file:

Loading driver at 0x000173D5000 EntryPoint=0x000173D52C0 UsbKbDxe.efi
Loading driver at 0x000173C7000 EntryPoint=0x000173C72C0 Ps2KeyboardDxe.efi

Though bdsdxe loads...
Loading driver at 0x00017428000 EntryPoint=0x000174282C0 BdsDxe.efi
... I do not see its debug messages.

You could would step through the code of PlatformBdsInit
to see why the messages from UpdateMemoryMap() are not displayed.
Thanks,
Scott
]
]
]Neo...
]
]
](Attached serial log) 
]
]
]
]
]On Wed, Nov 6, 2013 at 4:58 AM, Scott Duplichan <spambucket at notabs.org> wrote:
]Anthony Ross wrote:
]
]]Hello Coreboot Folks,
]]
]]Well Thanks for the suggestions. It seems that  DUET boots but now a major problem has ]]cropped up. It freezes at the main
]DUET-BIOS page not allowing to perform any further ]operations, like booting a HDD image ]or fingering around the EFI BIOS options.
]Similarly ]If I had the .lzma to the cbfs file name I face the same problem like earlier ]so having ]it as myfloppy.img makes it
take
]effect.
]]
]]
]]Any further Ideas about these problems.....
]]
]]
]]Regards..
]]
]]
]]Neo 
]For your freeze problem, how are you debugging? The usual way
]is to enable and capture debug messages written to a serial
]port. I believe the standard Duet settings make it write
]debugging messages to a serial port at 3F8 (115200,8,N,1).
]Because halt for assert is enabled by default on Duet, an
]assert is the most likely reason for a freeze. The assert
]will log details to the serial port.
]
]If your hardware doesn't have a serial port, you can use
]an emulator such as simnow or qemu. A good thing about
]Duet is that it is generic and in theory can run on
]different systems without porting. If I remember correctly,
]the current Duet project can boot to the UEFI shell and
]menu system on AMD simnow using the Solo board model.
]
]I am working on a project to allow Duet to run as a
]coreboot payload, and to fix the major Duet problems.
]It will also continue to support bootable image form.
]It may take me a few weeks to reach the goal of booting
]operating systems in UEFI mode on real hardware though.
]
]Thanks,
]Scott
]
]On Sat, Oct 26, 2013 at 8:01 PM, Kevin O'Connor <kevin at koconnor.net> wrote:
]On Thu, Oct 24, 2013 at 12:17:33AM -0500, Scott Duplichan wrote:
]> Scott Duplichan wrote:
]>
]> <..snip..>
]>
]> ]I have no experience with making SeaBIOS boot an embedded floppy
]> ]image. I may be able to give this a try, but I would have to first overcome
]> ]Windows build problems that have crept into both SeaBIOS and coreboot.
]>
]> I tested the SeaBIOS virtual floppy boot with EDK2 Duet and it worked
]> for me. I tested with the ASRock e350M1 project. Here is the cbfstool
]> output:
]Thanks for confirming.
]
]> scott at p67-2600k /D/coreboot/win-build-env-011/coreboot/build
]> $ cbfstool.exe coreboot.rom print
]> coreboot.rom: zd kB, bootblocksize 4096, romsize 1008, offset 0x400000
]> alignment: 0 bytes
]>
]> Name                           Offset     Type         Size
]> cmos_layout.bin                0x0        cmos_layout  1776
]> pci1002,9802.rom               0x740      optionrom    57856
]> fallback/romstage              0xe980     stage        345432
]> fallback/coreboot_ram          0x62f40    stage        203312
]> fallback/payload               0x949c0    payload      53738
]> config                         0xa1c00    raw          3831
]> (empty)                        0xa2b40    null         3526744
]>
]> scott at p67-2600k /D/coreboot/win-build-env-011/coreboot/build
]> $ cbfstool.exe coreboot.rom add -f /d/duetfloppy.img -n floppyimg/duetfloppy.img -t ]raw
]FYI, it's also possible to add an lzma compressed image (make sure the
]cbfs filename ends in ".lzma" then).
]
]-Kevin