Hi Simon, On Mon, Oct 19, 2015 at 10:51 AM, Simon Glass <[email protected]> wrote: > Hi Bin, > > On 10 October 2015 at 02:57, Bin Meng <[email protected]> wrote: >> Hi Simon, >> >> On Sat, Oct 3, 2015 at 10:29 PM, Simon Glass <[email protected]> wrote: >>> Hi Bin, >>> >>> On 29 September 2015 at 11:17, Bin Meng <[email protected]> wrote: >>>> SeaBIOS is an open source implementation of a 16-bit X86 BIOS. >>>> It can run in an emulator or natively on X86 hardware with the >>>> use of coreboot. With SeaBIOS's help, we can boot some OSes >>>> that require 16-bit BIOS services like Windows/DOS. >>>> >>>> As U-Boot, we have to manually create a table where SeaBIOS gets >>>> system information (eg: E820) from. The table unfortunately has >>>> to follow the coreboot table format as SeaBIOS currently supports >>>> booting as a coreboot payload. No U-Boot native support there. >>>> >>>> Booting SeaBIOS is done via U-Boot's bootelf command. >>>> >>>> This is the initial attempt to support booting SeaBIOS from U-Boot. >>>> If the basic concept is good, I can spend time working on follow-on >>>> patches to enable BIOS tables as well as graphics support. One issue >>>> is that U-Boot x86 does not has a ROM file system like coreboot. >>>> This brings difficulities to pass PCI option ROM to SeaBIOS, if we >>>> don't modify SeaBIOS's source codes. Maybe we should promote CBFS >>>> in U-Boot x86? >>>> >>>> This is tested on an Intel Crown Bay board with VGA card, booting >>>> SeaBIOS then chain loading a GRUB on a USB drive, then Linux kernel >>>> finally. >>> >>> Looks good to me. I think it is OK to use CBFS if needed - are you >>> thinking of an option to build u-boot.rom as a CBFS filesystem? >> >> If using CBFS, that means we may have to abandon ifdtool? Or maybe >> mixed usage of both tools? > > So far I'm not sure of the best approach. At present we have the ROM > offsets stored mostly in Kconfig, with the MRC area in the SPI flash > device tree node. The environment is also in Kconfig. > > What sort of option ROMs do you want to support? What other options > does seabios provide? >
I believe SeaBIOS can run any kind of PCI option ROMs, but I have never tested other than vgabios. Also per coreboot's documentation, booting Windows needs SeaBIOS. > What does SEA stand for? I guess it's because most of SeaBIOS's source codes are written in 'C', thus a 'C' BIOS. Regards, Bin _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
