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| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2008-10-01 20:11:06 +0400 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-10-01 20:24:04 +0400 |
| commit | 07f841b7c587a3cbf481509be09ba5eda05f8d31 (patch) | |
| tree | 44f7a45c56568f17841c1a37afc49193fecb1714 /arch/arm/include/asm/sparsemem.h | |
| parent | b7a69ac303cbfc8d6fa8e91d10e8049244ba6847 (diff) | |
| download | linux-07f841b7c587a3cbf481509be09ba5eda05f8d31.tar.xz | |
[ARM] mm: enable sparsemem on clps7500 and RiscPC
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include/asm/sparsemem.h')
| -rw-r--r-- | arch/arm/include/asm/sparsemem.h | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/arch/arm/include/asm/sparsemem.h b/arch/arm/include/asm/sparsemem.h index 277158191a0d..00098615c6f0 100644 --- a/arch/arm/include/asm/sparsemem.h +++ b/arch/arm/include/asm/sparsemem.h @@ -3,8 +3,22 @@ #include <asm/memory.h> -#define MAX_PHYSADDR_BITS 32 -#define MAX_PHYSMEM_BITS 32 -#define SECTION_SIZE_BITS NODE_MEM_SIZE_BITS +/* + * Two definitions are required for sparsemem: + * + * MAX_PHYSMEM_BITS: The number of physical address bits required + * to address the last byte of memory. + * + * SECTION_SIZE_BITS: The number of physical address bits to cover + * the maximum amount of memory in a section. + * + * Eg, if you have 2 banks of up to 64MB at 0x80000000, 0x84000000, + * then MAX_PHYSMEM_BITS is 32, SECTION_SIZE_BITS is 26. + * + * Define these in your mach/memory.h. + */ +#if !defined(SECTION_SIZE_BITS) || !defined(MAX_PHYSMEM_BITS) +#error Sparsemem is not supported on this platform +#endif #endif |