On Sat, 17 May 2003 21:45:55 +0900 (JST), Atsushi Nemoto <anemo@xxxxxxxxxxxxx> wrote: > This patch fixes FIXADDR_TOP for TX39/TX49. FIXADDR_TOP is used not > only if CONFIG_HIGHMEM is enabled. It is also used for high limit > address for vmalloc. Now this patch is 3 years old :-) Updated. FIXADDR_TOP is used for HIGHMEM and for upper limit of vmalloc area on 32bit kernel. TX39XX and TX49XX have "reserved" segment in CKSEG3 area. 0xff000000-0xff3fffff on TX49XX and 0xff000000-0xfffeffff on TX39XX are reserved (unmapped, uncached) therefore can not be used as mapped area. Signed-off-by: Atsushi Nemoto <anemo@xxxxxxxxxxxxx> diff --git a/include/asm-mips/fixmap.h b/include/asm-mips/fixmap.h index 73a3028..c7f4ee1 100644 --- a/include/asm-mips/fixmap.h +++ b/include/asm-mips/fixmap.h @@ -70,7 +70,11 @@ #define set_fixmap_nocache(idx, phys) \ * 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) +#else #define FIXADDR_TOP (0xffffe000UL) +#endif #define FIXADDR_SIZE (__end_of_fixed_addresses << PAGE_SHIFT) #define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE)
