diff options
Diffstat (limited to 'kernel/arch/arm/include/asm/sparsemem.h')
| -rw-r--r-- | kernel/arch/arm/include/asm/sparsemem.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/kernel/arch/arm/include/asm/sparsemem.h b/kernel/arch/arm/include/asm/sparsemem.h new file mode 100644 index 000000000..00098615c --- /dev/null +++ b/kernel/arch/arm/include/asm/sparsemem.h @@ -0,0 +1,24 @@ +#ifndef ASMARM_SPARSEMEM_H +#define ASMARM_SPARSEMEM_H + +#include <asm/memory.h> + +/* + * 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 |