Atsushi Nemoto wrote:
> >>>>> On Sat, 17 May 2003 21:45:55 +0900 (JST), Atsushi Nemoto
> >>>>> <firstname.lastname@example.org> said:
> anemo> On TX39/TX49, high 16MB in virtual address space
> anemo> (0xff000000-0xffffffff) are reserved and can not be used as
> anemo> normal mapped/cached segment.
> anemo> This patch fixes FIXADDR_TOP for TX39/TX49. FIXADDR_TOP is
> anemo> used not only if CONFIG_HIGHMEM is enabled. It is also used
> anemo> for high limit address for vmalloc.
> anemo> This patch can be applied to both 2.4 and 2.5. I'm not sure
> anemo> whether subtracting 0x2000 is necessary or not but doing it is
> anemo> a safe bet. Please apply.
> This patch can still be applied to 2.6. Could you apply?
> --- linux-mips/include/asm-mips/fixmap.h Sat Nov 27 00:39:25 2004
> +++ linux/include/asm-mips/fixmap.h Sat Dec 18 21:21:01 2004
> @@ -70,7 +70,11 @@
> * the start of the fixmap, and leave one page empty
> * at the top of mem..
> +#if defined(CONFIG_CPU_TX39XX) || defined(CONFIG_CPU_TX49XX)
> +#define FIXADDR_TOP (0xff000000UL - 0x2000)
> #define FIXADDR_TOP (0xffffe000UL)
I figure it's PAGE_SIZE which should be subtracted here. (Or is it
2 * PAGE_SIZE for paired r4k-style TLBs?)