| Russell King | 05944d7 | 2006-11-30 20:43:51 +0000 | [diff] [blame] | 1 | #ifndef ASMARM_SPARSEMEM_H |
| 2 | #define ASMARM_SPARSEMEM_H |
| 3 | |
| 4 | #include <asm/memory.h> |
| 5 | |
| Russell King | 07f841b | 2008-10-01 17:11:06 +0100 | [diff] [blame] | 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 |
| Russell King | 05944d7 | 2006-11-30 20:43:51 +0000 | [diff] [blame] | 23 | |
| 24 | #endif |