* [PATCH] 16KB page size in mips32
@ 2007-07-20 8:10 Dajie Tan
2007-07-30 14:11 ` Songmao Tian
0 siblings, 1 reply; 2+ messages in thread
From: Dajie Tan @ 2007-07-20 8:10 UTC (permalink / raw)
To: linux-mips
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))
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] 16KB page size in mips32
2007-07-20 8:10 [PATCH] 16KB page size in mips32 Dajie Tan
@ 2007-07-30 14:11 ` Songmao Tian
0 siblings, 0 replies; 2+ messages in thread
From: Songmao Tian @ 2007-07-30 14:11 UTC (permalink / raw)
To: Dajie Tan; +Cc: linux-mips
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.
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