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05944d74 RK |
1 | #ifndef ASMARM_SPARSEMEM_H |
2 | #define ASMARM_SPARSEMEM_H | |
3 | ||
4 | #include <asm/memory.h> | |
5 | ||
07f841b7 RK |
6 | /* |
7 | * Two definitions are required for sparsemem: | |
8 | * | |
9 | * MAX_PHYSMEM_BITS: The number of physical address bits required | |
10 | * to address the last byte of memory. | |
11 | * | |
12 | * SECTION_SIZE_BITS: The number of physical address bits to cover | |
13 | * the maximum amount of memory in a section. | |
14 | * | |
15 | * Eg, if you have 2 banks of up to 64MB at 0x80000000, 0x84000000, | |
16 | * then MAX_PHYSMEM_BITS is 32, SECTION_SIZE_BITS is 26. | |
17 | * | |
18 | * Define these in your mach/memory.h. | |
19 | */ | |
20 | #if !defined(SECTION_SIZE_BITS) || !defined(MAX_PHYSMEM_BITS) | |
21 | #error Sparsemem is not supported on this platform | |
22 | #endif | |
05944d74 RK |
23 | |
24 | #endif |