Re: [PATCH v2 0/8] hm/mips/fuloong2e fixes

[BALATON Zoltan]

On Sat, 19 Dec 2020, Jiaxun Yang wrote:
> It can now boot Debian installer[1] as well as a custom PMON bootloader
> distribution[2].
>
> Note that it can't boot PMON shipped with actual machine as our ATI vgabios
> is using some x86 hack that can't be handled by x86emu in original PMON.

This may be similar problem that I've seen with similar PPC firmwares:

https://osdn.net/projects/qmiga/wiki/SubprojectAti
https://osdn.net/projects/qmiga/wiki/SubprojectPegasos2#h3-Known.20issues

TLDR; vgabios-ati.bin is compiled for i386 real mode (bacause that's what 
gcc can do, real x86 real mode would need something like bcc I think) that 
some x86emu can't handle. You can either use Bochs vga bios via romfile 
property of the vga emulation or try the option for x86emu when compiling 
vgabios-ati.bin (which did not help the firmwares I've tried).

Regards,
BALATON Zoltan

> Tree avilable at: https://gitlab.com/FlyGoat/qemu/-/tree/fuloong_fixes_v2
>
> v2:
> - Collect review tags.
> - Get CPU clock via elegant method. (philmd)
> - Add boot_linux_console scceptance test
>
> [1]: 
> http://archive.debian.org/debian/dists/jessie/main/installer-mipsel/current/images/loongson-2e/netboot/
> [2]: 
> https://github.com/loongson-community/pmon/releases/download/20201219/pmon-2edev.bin
>
> Thanks.
>
> - Jiaxun
>
> Jiaxun Yang (8):
>  hw/mips/fuloong2e: Remove define DEBUG_FULOONG2E_INIT
>  hw/mips/fuloong2e: Relpace fault links
>  hw/pci-host/bonito: Fixup IRQ mapping
>  hw/pci-host/bonito: Fixup pci.lomem mapping
>  hw/mips/fuloong2e: Remove unused env entry
>  hw/mips/fuloong2e: Correct cpuclock env
>  hw/mips/fuloong2e: Add highmem support
>  tests/acceptance: Test boot_linux_console for fuloong2e
>
> hw/mips/fuloong2e.c                    | 84 +++++++++++++++++---------
> hw/pci-host/bonito.c                   | 45 ++++----------
> tests/acceptance/boot_linux_console.py | 21 +++++++
> 3 files changed, 87 insertions(+), 63 deletions(-)