1 #ifndef __ASM_SH_PGTABLE_3LEVEL_H 2 #define __ASM_SH_PGTABLE_3LEVEL_H 3 4 #define __ARCH_USE_5LEVEL_HACK 5 #include <asm-generic/pgtable-nopud.h> 6 7 /* 8 * Some cores need a 3-level page table layout, for example when using 9 * 64-bit PTEs and 4K pages. 10 */ 11 #define PAGETABLE_LEVELS 3 12 13 #define PTE_MAGNITUDE 3 /* 64-bit PTEs on SH-X2 TLB */ 14 15 /* PGD bits */ 16 #define PGDIR_SHIFT 30 17 18 #define PTRS_PER_PGD 4 19 #define USER_PTRS_PER_PGD 2 20 21 /* PMD bits */ 22 #define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT - PTE_MAGNITUDE)) 23 #define PMD_SIZE (1UL << PMD_SHIFT) 24 #define PMD_MASK (~(PMD_SIZE-1)) 25 26 #define PTRS_PER_PMD ((1 << PGDIR_SHIFT) / PMD_SIZE) 27 28 #define pmd_ERROR(e) \ 29 printk("%s:%d: bad pmd %016llx.\n", __FILE__, __LINE__, pmd_val(e)) 30 31 typedef struct { unsigned long long pmd; } pmd_t; 32 #define pmd_val(x) ((x).pmd) 33 #define __pmd(x) ((pmd_t) { (x) } ) 34 35 static inline unsigned long pud_page_vaddr(pud_t pud) 36 { 37 return pud_val(pud); 38 } 39 40 #define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)) 41 static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) 42 { 43 return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address); 44 } 45 46 #define pud_none(x) (!pud_val(x)) 47 #define pud_present(x) (pud_val(x)) 48 #define pud_clear(xp) do { set_pud(xp, __pud(0)); } while (0) 49 #define pud_bad(x) (pud_val(x) & ~PAGE_MASK) 50 51 /* 52 * (puds are folded into pgds so this doesn't get actually called, 53 * but the define is needed for a generic inline function.) 54 */ 55 #define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0) 56 57 #endif /* __ASM_SH_PGTABLE_3LEVEL_H */ 58