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List: linux-arch
Subject: Re: Re: [PATCH V11 09/22] LoongArch: Add boot and setup routines
From: 李超 <lichao () loongson ! cn>
Date: 2022-05-24 12:48:49
Message-ID: 7254fade.54d5.180f61ce0ca.Coremail.lichao () loongson ! cn
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Hi Ruoyao,
I got a message from Huacai that you want to get the firmware that can boot this \
kernel, so what kind of machine do you have? Can you provide information on SMBIOS \
type0, type1 and type2 of the machine at hand? I think it would be better if you \
could provid the image of machine and motherboard.
Referring to Huacai, we are going create a webpage on the Github that can provide the \
firmware which can boot the new interface kernels, we will provide as many kinds of \
machine firmware as possible, including qemu firmware. I beleve it will see you soon. \
:)
Thanks,
Chao
> -----原始邮件-----
> 发件人: "Huacai Chen" <chenhuacai@gmail.com>
> 发送时间: 2022-05-24 18:59:50 (星期二)
> 收件人: "Xi Ruoyao" <xry111@xry111.site>, lichao@loongson.cn
> 抄送: "Huacai Chen" <chenhuacai@loongson.cn>, "Arnd Bergmann" <arnd@arndb.de>, \
"Andy Lutomirski" <luto@kernel.org>, "Thomas Gleixner" <tglx@linutronix.de>, "Peter \
Zijlstra" <peterz@infradead.org>, "Andrew Morton" <akpm@linux-foundation.org>, "David \
Airlie" <airlied@linux.ie>, "Jonathan Corbet" <corbet@lwn.net>, "Linus Torvalds" \
<torvalds@linux-foundation.org>, linux-arch <linux-arch@vger.kernel.org>, "open \
list:DOCUMENTATION" <linux-doc@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>, \
"Xuefeng Li" <lixuefeng@loongson.cn>, "Yanteng Si" <siyanteng@loongson.cn>, "Guo Ren" \
<guoren@kernel.org>, "Xuerui Wang" <kernel@xen0n.name>, "Jiaxun Yang" \
<jiaxun.yang@flygoat.com>, "Stephen Rothwell" <sfr@canb.auug.org.au>, linux-efi \
<linux-efi@vger.kernel.org>, "Ard Biesheuvel" <ardb@kernel.org> > 主题: Re: \
[PATCH V11 09/22] LoongArch: Add boot and setup routines >
> Hi, Ruoyao,
>
> On Tue, May 24, 2022 at 4:27 PM Xi Ruoyao <xry111@xry111.site> wrote:
> >
> > On Wed, 2022-05-18 at 17:26 +0800, Huacai Chen wrote:
> > > Currently an existing interface between the kernel and the bootloader
> > > is implemented. Kernel gets 2 values from the bootloader, passed in
> > > registers a0 and a1; a0 is an "EFI boot flag" distinguishing UEFI and
> > > non-UEFI firmware, while a1 is a pointer to an FDT with systable,
> > > memmap, cmdline and initrd information.
> >
> > If I understand this correctly, we can:
> >
> > - set a0 to 0
> > - set a1 a pointer (virtual address or physical address?) to the FDT
> > with these information
> >
> > in the bootloader before invoking the kernel, then it will be possible
> > to boot this kernel w/o firmware update?
> Unfortunately, there is no released firmware for you since we recently
> changed the interface again and again. :(
> You can contact with Li Chao (lichao@loongson.cn), I think he can
> provide help as much as possible (at least provide temporary firmwares
> for developers).
> We will also provide qemu-system and virtual machine's firmware as
> soon as possible.
>
> Huacai
>
> >
> > I'd prefer to receive a firmware update anyway, but we need an
> > alternative if some vendor just say "no way, our customized distro works
> > fine and you should use it". (I'm not accusing LoongArch: such annoying
> > behavior is common among vendors of all architectures, and even worse
> > with x86 because they often say "just use Windoge".)
> > --
> > Xi Ruoyao <xry111@xry111.site>
> > School of Aerospace Science and Technology, Xidian University
</xry111@xry111.site></xry111@xry111.site></ardb@kernel.org></linux-efi@vger.kernel.or \
g></sfr@canb.auug.org.au></jiaxun.yang@flygoat.com></kernel@xen0n.name></guoren@kernel \
.org></siyanteng@loongson.cn></lixuefeng@loongson.cn></linux-kernel@vger.kernel.org></ \
linux-doc@vger.kernel.org></linux-arch@vger.kernel.org></torvalds@linux-foundation.org \
></corbet@lwn.net></airlied@linux.ie></akpm@linux-foundation.org></peterz@infradead.or \
> g></tglx@linutronix.de></luto@kernel.org></arnd@arndb.de></chenhuacai@loongson.cn></xry111@xry111.site></chenhuacai@gmail.com>
>
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