linux-kernel - Re: [PATCH V2 22/22] MIPS: Add multiplatform BMIPS target

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Message-ID: <CAOiHx=kutuOw4kTukm3FvSS-Fwah_yF2byDQFdpM9YQCn6x93g@mail.gmail.com>
Date:	Tue, 18 Nov 2014 00:06:48 +0100
From:	Jonas Gorski <jogo@...nwrt.org>
To:	Kevin Cernekee <cernekee@...il.com>
Cc:	Arnd Bergmann <arnd@...db.de>, Ralf Baechle <ralf@...ux-mips.org>,
	Florian Fainelli <f.fainelli@...il.com>,
	Jon Fraser <jfraser@...adcom.com>,
	Dmitry Torokhov <dtor@...omium.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jason Cooper <jason@...edaemon.net>,
	Linux MIPS Mailing List <linux-mips@...ux-mips.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V2 22/22] MIPS: Add multiplatform BMIPS target

On Mon, Nov 17, 2014 at 10:21 PM, Kevin Cernekee <cernekee@...il.com> wrote:
> Currently the bootloader is responsible for decompressing the image.
> On STB the bootloader typically loads a gzipped ELF file; on DSL/CM
> the bootloader unpacks a custom image format containing an
> LZMA-compressed kernel in some form.  So we would be
> double-compressing the same kernel in this scheme.

For the latter I use a patch[1] for mips head.S that detects if
there's a dtb appended to the vmlinux.bin, which would be trivial to
adapt to what the well-defined (b)mips interface expects. Of course
then there is no board detection at all, but I think that's an
acceptable trade off.


Jonas

[1] http://git.openwrt.org/?p=openwrt.git;a=blob;f=target/linux/brcm63xx/patches-3.14/366-MIPS-add-support-for-vmlinux.bin-appended-DTB.patch;h=344e78b5b41e03bff5f3d1f9cce1e8e2cb1a9368;hb=HEAD
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