diff options
Diffstat (limited to 'arch/sparc/include')
| -rw-r--r-- | arch/sparc/include/asm/page_64.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/page_64.h b/arch/sparc/include/asm/page_64.h index 9dd0f7360822..978ea6d022e9 100644 --- a/arch/sparc/include/asm/page_64.h +++ b/arch/sparc/include/asm/page_64.h @@ -121,6 +121,22 @@ typedef pte_t *pgtable_t; #define PAGE_OFFSET_BY_BITS(X) (-(_AC(1,UL) << (X))) #define PAGE_OFFSET PAGE_OFFSET_BY_BITS(MAX_SUPPORTED_PA_BITS) +/* The "virtual" portion of PAGE_OFFSET, used to clip off the non-physical + * bits of a linear kernel address. + */ +#define PAGE_OFFSET_VA_BITS (64 - MAX_SUPPORTED_PA_BITS) + +/* The actual number of physical memory address bits we support, this is + * used to size various tables used to manage kernel TLB misses. + */ +#define MAX_PHYS_ADDRESS_BITS 41 + +/* These two shift counts are used when indexing sparc64_valid_addr_bitmap + * and kpte_linear_bitmap. + */ +#define ILOG2_4MB 22 +#define ILOG2_256MB 28 + #ifndef __ASSEMBLY__ #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET) |