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From: "Jiaxun Yang" <jiaxun.yang@flygoat.com>
To: "BALATON Zoltan" <balaton@eik.bme.hu>
Cc: crosa@redhat.com, chenhuacai@kernel.org, qemu-devel@nongnu.org,
	wainersm@redhat.com, f4bug@amsat.org
Subject: Re: [PATCH v2 0/8] hm/mips/fuloong2e fixes
Date: Sat, 19 Dec 2020 20:37:42 +0800	[thread overview]
Message-ID: <5cb09aab-f425-4faa-969d-9df324768af2@www.fastmail.com> (raw)
In-Reply-To: <516bc88e-d49-94f9-b4a2-a9d31e9026@eik.bme.hu>



在2020年12月19日十二月 下午8:13，BALATON Zoltan写道：
> 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).

Hi,

Thinks for your reminder!

To be more specified, our x86emu in PMON can handle i386 real mode,
however vgabios-ati uses INT15h when INT10h ax=0x4f01 (Get VESA Mode)
is called. And x86emu won't process INT15h properly.

My workround[1] is to allow 0x4f01 to be failed in PMON, as ax=0x4f02
(Set VESA Mode) do work, it won't be a actual problem.


- Jiaxun


  reply	other threads:[~2020-12-19 12:39 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-19  7:12 [PATCH v2 0/8] hm/mips/fuloong2e fixes Jiaxun Yang
2020-12-19  7:12 ` [PATCH v2 1/8] hw/mips/fuloong2e: Remove define DEBUG_FULOONG2E_INIT Jiaxun Yang
2020-12-22  0:26   ` Huacai Chen
2020-12-19  7:12 ` [PATCH v2 2/8] hw/mips/fuloong2e: Relpace fault links Jiaxun Yang
2020-12-19 17:52   ` Philippe Mathieu-Daudé
2020-12-22  0:30     ` Huacai Chen
2020-12-19  7:18 ` [PATCH v2 3/8] hw/pci-host/bonito: Fixup IRQ mapping Jiaxun Yang
2020-12-21 21:06   ` Philippe Mathieu-Daudé
2020-12-19  7:18 ` [PATCH v2 4/8] hw/pci-host/bonito: Fixup pci.lomem mapping Jiaxun Yang
2020-12-21 20:45   ` Philippe Mathieu-Daudé
2020-12-22  0:36     ` Jiaxun Yang
2020-12-22 12:13       ` Philippe Mathieu-Daudé
2020-12-19  7:21 ` [PATCH v2 5/8] hw/mips/fuloong2e: Remove unused env entry Jiaxun Yang
2020-12-22  0:27   ` Huacai Chen
2020-12-22 14:42   ` Philippe Mathieu-Daudé
2020-12-19  7:21 ` [PATCH v2 6/8] hw/mips/fuloong2e: Correct cpuclock env Jiaxun Yang
2020-12-19 18:22   ` Philippe Mathieu-Daudé
2020-12-22  0:28     ` Huacai Chen
2020-12-19  7:23 ` [PATCH v2 7/8] hw/mips/fuloong2e: Add highmem support Jiaxun Yang
2020-12-19 19:02   ` Philippe Mathieu-Daudé
2020-12-21 20:34   ` Philippe Mathieu-Daudé
2020-12-22  1:13     ` Huacai Chen
2020-12-19  7:23 ` [PATCH v2 8/8] tests/acceptance: Test boot_linux_console for fuloong2e Jiaxun Yang
2020-12-19 18:57   ` Philippe Mathieu-Daudé
2020-12-21 21:17   ` Wainer dos Santos Moschetta
2020-12-21 21:35   ` Willian Rampazzo
2020-12-22  0:24     ` Huacai Chen
2020-12-19 12:13 ` [PATCH v2 0/8] hm/mips/fuloong2e fixes BALATON Zoltan via
2020-12-19 12:37   ` Jiaxun Yang [this message]
2020-12-19 16:03     ` BALATON Zoltan via
2020-12-21  9:52       ` Gerd Hoffmann

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