diff options
Diffstat (limited to 'arch/powerpc/include/asm/pgtable-ppc64-64k.h')
| -rw-r--r-- | arch/powerpc/include/asm/pgtable-ppc64-64k.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/pgtable-ppc64-64k.h b/arch/powerpc/include/asm/pgtable-ppc64-64k.h new file mode 100644 index 00000000000..6cc085b945a --- /dev/null +++ b/arch/powerpc/include/asm/pgtable-ppc64-64k.h @@ -0,0 +1,42 @@ +#ifndef _ASM_POWERPC_PGTABLE_PPC64_64K_H +#define _ASM_POWERPC_PGTABLE_PPC64_64K_H + +#include <asm-generic/pgtable-nopud.h> + + +#define PTE_INDEX_SIZE 12 +#define PMD_INDEX_SIZE 12 +#define PUD_INDEX_SIZE 0 +#define PGD_INDEX_SIZE 4 + +#ifndef __ASSEMBLY__ + +#define PTE_TABLE_SIZE (sizeof(real_pte_t) << PTE_INDEX_SIZE) +#define PMD_TABLE_SIZE (sizeof(pmd_t) << PMD_INDEX_SIZE) +#define PGD_TABLE_SIZE (sizeof(pgd_t) << PGD_INDEX_SIZE) + +#define PTRS_PER_PTE (1 << PTE_INDEX_SIZE) +#define PTRS_PER_PMD (1 << PMD_INDEX_SIZE) +#define PTRS_PER_PGD (1 << PGD_INDEX_SIZE) + +/* With 4k base page size, hugepage PTEs go at the PMD level */ +#define MIN_HUGEPTE_SHIFT PAGE_SHIFT + +/* PMD_SHIFT determines what a second-level page table entry can map */ +#define PMD_SHIFT (PAGE_SHIFT + PTE_INDEX_SIZE) +#define PMD_SIZE (1UL << PMD_SHIFT) +#define PMD_MASK (~(PMD_SIZE-1)) + +/* PGDIR_SHIFT determines what a third-level page table entry can map */ +#define PGDIR_SHIFT (PMD_SHIFT + PMD_INDEX_SIZE) +#define PGDIR_SIZE (1UL << PGDIR_SHIFT) +#define PGDIR_MASK (~(PGDIR_SIZE-1)) + +#endif /* __ASSEMBLY__ */ + +/* Bits to mask out from a PMD to get to the PTE page */ +#define PMD_MASKED_BITS 0x1ff +/* Bits to mask out from a PGD/PUD to get to the PMD page */ +#define PUD_MASKED_BITS 0x1ff + +#endif /* _ASM_POWERPC_PGTABLE_PPC64_64K_H */ |