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Date:	Mon, 30 Jul 2007 22:11:09 +0800
From:	Songmao Tian <tiansm@lemote.com>
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To:	Dajie Tan <jiankemeng@gmail.com>
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Subject: Re: [PATCH] 16KB page size in mips32
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Dajie Tan wrote:
> Hello,
>
> 32-bit Kernel for loongson2e currently use 16KB page size to avoid
> cache alias problem.So, the definiton of PGDIR_SHIFT muse be 14+12.
>
> The last is the patch. It's been tested on FuLong mini PC(loongson2e 
> inside).
>
>
> --------------------
>
> --- a/include/asm-mips/pgtable-32.h 2007-07-19 08:22:43.000000000 +0800
> +++ b/include/asm-mips/pgtable-32.h 2007-07-20 11:12:40.000000000 +0800
> @@ -46,7 +46,7 @@
> #ifdef CONFIG_64BIT_PHYS_ADDR
> #define PGDIR_SHIFT    21
> #else
> -#define PGDIR_SHIFT    22
> +#define PGDIR_SHIFT    (PAGE_SHIFT + (PAGE_SHIFT + PTE_ORDER - 2))
> #endif
> #define PGDIR_SIZE (1UL << PGDIR_SHIFT)
> #define PGDIR_MASK (~(PGDIR_SIZE-1))
>
>
>
Ralf, please take a look at this patch, and I suspect the "21" also need 
to be fixed too.

Dajie Tan, would you please resend the patch with correct format and add 
a detailed comment as you posted on lemote forum? Thanks.