linux-kernel - Re: [PATCH] mips: add support for Siflower MIPS SoCs

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Message-ID: <CAJsYDVKTka25bpLVDh4W6p5mzo_zKY13=gO8r-VSsyOtm2v6sQ@mail.gmail.com>
Date: Thu, 23 Jan 2025 10:43:40 +0800
From: Chuanhong Guo <gch981213@...il.com>
To: Jiaxun Yang <jiaxun.yang@...goat.com>
Cc: Thomas Bogendoerfer <tsbogend@...ha.franken.de>, 
	"paulburton@...nel.org" <paulburton@...nel.org>, 
	"linux-mips@...r.kernel.org" <linux-mips@...r.kernel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mips: add support for Siflower MIPS SoCs

On Wed, Jan 22, 2025 at 8:05 PM Jiaxun Yang <jiaxun.yang@...goat.com> wrote:
>
>
>
> 在2025年1月20日一月 上午1:52，Chuanhong Guo写道：
> > Siflower MIPS SoCs like SF19A2890 uses dual-core MIPS InterAptiv
> > processor, built-in GMAC, USB, dual-band WiFi and various other
> > peripherals.
> > Notably, it uses some ARM PLxxx peripherals, and ARM_AMBA is
> > selected for the drivers.
> > Most devices on the market with this chip come with 64M or less
> > DRAM. A kmalloc.h with malloc alignment override is added to
> > conserve memory, and a MACH_SIFLOWER_MIPS is created with reduced
> > features instead of using the generic kernel.
> >
> > Signed-off-by: Chuanhong Guo <gch981213@...il.com>
>
> Hmm, why not using MIPS_GENERIC.

Mainly to override MIPS_L1_CACHE_SHIFT and ARCH_DMA_MINALIGN.
This saves about 1MB of memory if I remember correctly.

-- 
Regards,
Chuanhong Guo