1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __ASM_SH_PGTABLE_3LEVEL_H 3 #define __ASM_SH_PGTABLE_3LEVEL_H 4 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 union { 32 struct { 33 unsigned long pmd_low; 34 unsigned long pmd_high; 35 }; 36 unsigned long long pmd; 37 } pmd_t; 38 #define pmd_val(x) ((x).pmd) 39 #define __pmd(x) ((pmd_t) { .pmd = (x) } ) 40 41 static inline pmd_t *pud_pgtable(pud_t pud) 42 { 43 return (pmd_t *)(unsigned long)pud_val(pud); 44 } 45 46 /* only used by the stubbed out hugetlb gup code, should never be called */ 47 #define pud_page(pud) NULL 48 #define pud_none(x) (!pud_val(x)) 49 #define pud_present(x) (pud_val(x)) 50 #define pud_clear(xp) do { set_pud(xp, __pud(0)); } while (0) 51 #define pud_bad(x) (pud_val(x) & ~PAGE_MASK) 52 53 /* 54 * (puds are folded into pgds so this doesn't get actually called, 55 * but the define is needed for a generic inline function.) 56 */ 57 #define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0) 58 59 #endif /* __ASM_SH_PGTABLE_3LEVEL_H */ 60