diff options
Diffstat (limited to 'arch/powerpc/include/asm/book3s/64/hash-4k.h')
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/hash-4k.h | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/hash-4k.h b/arch/powerpc/include/asm/book3s/64/hash-4k.h index cf5ba5254299..8fd8599c9395 100644 --- a/arch/powerpc/include/asm/book3s/64/hash-4k.h +++ b/arch/powerpc/include/asm/book3s/64/hash-4k.h @@ -2,10 +2,10 @@ #ifndef _ASM_POWERPC_BOOK3S_64_HASH_4K_H #define _ASM_POWERPC_BOOK3S_64_HASH_4K_H -#define H_PTE_INDEX_SIZE 9 -#define H_PMD_INDEX_SIZE 7 -#define H_PUD_INDEX_SIZE 9 -#define H_PGD_INDEX_SIZE 9 +#define H_PTE_INDEX_SIZE 9 // size: 8B << 9 = 4KB, maps: 2^9 x 4KB = 2MB +#define H_PMD_INDEX_SIZE 7 // size: 8B << 7 = 1KB, maps: 2^7 x 2MB = 256MB +#define H_PUD_INDEX_SIZE 9 // size: 8B << 9 = 4KB, maps: 2^9 x 256MB = 128GB +#define H_PGD_INDEX_SIZE 9 // size: 8B << 9 = 4KB, maps: 2^9 x 128GB = 64TB /* * Each context is 512TB. But on 4k we restrict our max TASK size to 64TB @@ -13,6 +13,21 @@ */ #define MAX_EA_BITS_PER_CONTEXT 46 +#define REGION_SHIFT (MAX_EA_BITS_PER_CONTEXT - 2) + +/* + * Our page table limit us to 64TB. Hence for the kernel mapping, + * each MAP area is limited to 16 TB. + * The four map areas are: linear mapping, vmap, IO and vmemmap + */ +#define H_KERN_MAP_SIZE (ASM_CONST(1) << REGION_SHIFT) + +/* + * Define the address range of the kernel non-linear virtual area + * 16TB + */ +#define H_KERN_VIRT_START ASM_CONST(0xc000100000000000) + #ifndef __ASSEMBLY__ #define H_PTE_TABLE_SIZE (sizeof(pte_t) << H_PTE_INDEX_SIZE) #define H_PMD_TABLE_SIZE (sizeof(pmd_t) << H_PMD_INDEX_SIZE) |