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[MIPS] Fix FIXADDR_TOP for TX39/TX49.

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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@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Atsushi Nemoto 2006-06-20 23:59:11 +09:00 committed by Ralf Baechle
parent 6feb6efaec
commit f7a849153b
1 changed files with 4 additions and 0 deletions
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4
include/asm-mips/fixmap.h
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@ -69,7 +69,11 @@ extern void __set_fixmap (enum fixed_addresses idx,
* 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)