diff options
| author | Liu Hua <sdu.liu@huawei.com> | 2014-04-18 12:43:32 +0400 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2014-04-23 14:09:42 +0400 |
| commit | a05e54c103b0b8e1dab5d04b411f1d48387c4903 (patch) | |
| tree | d9960fd5c3517f42f57c4513e28dd51a6353ec27 /arch/arm/include/asm/fixmap.h | |
| parent | 4221e2e6b3160e4b558df14fa79f025c0e277935 (diff) | |
| download | linux-a05e54c103b0b8e1dab5d04b411f1d48387c4903.tar.xz | |
ARM: 8031/2: change fixmap mapping region to support 32 CPUs
In 32-bit ARM systems, the fixmap mapping region can support no more
than 14 CPUs(total: 896k; one CPU: 64K). And we can configure NR_CPUS
up to 32. So there is a mismatch.
This patch moves fixmapping region downwards to region 0xffc00000-
0xffe00000. Then the fixmap mapping region can support up to 32 CPUs.
Reviewed-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Liu Hua <sdu.liu@huawei.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include/asm/fixmap.h')
| -rw-r--r-- | arch/arm/include/asm/fixmap.h | 16 |
1 files changed, 2 insertions, 14 deletions
diff --git a/arch/arm/include/asm/fixmap.h b/arch/arm/include/asm/fixmap.h index be55ebc08ed4..74124b0d0d79 100644 --- a/arch/arm/include/asm/fixmap.h +++ b/arch/arm/include/asm/fixmap.h @@ -1,20 +1,8 @@ #ifndef _ASM_FIXMAP_H #define _ASM_FIXMAP_H -/* - * Nothing too fancy for now. - * - * On ARM we already have well known fixed virtual addresses imposed by - * the architecture such as the vector page which is located at 0xffff0000, - * therefore a second level page table is already allocated covering - * 0xfff00000 upwards. - * - * The cache flushing code in proc-xscale.S uses the virtual area between - * 0xfffe0000 and 0xfffeffff. - */ - -#define FIXADDR_START 0xfff00000UL -#define FIXADDR_TOP 0xfffe0000UL +#define FIXADDR_START 0xffc00000UL +#define FIXADDR_TOP 0xffe00000UL #define FIXADDR_SIZE (FIXADDR_TOP - FIXADDR_START) #define FIX_KMAP_NR_PTES (FIXADDR_SIZE >> PAGE_SHIFT) |