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 31typedef struct { unsigned long long pmd; } pmd_t; 32#define pmd_val(x) ((x).pmd) 33#define __pmd(x) ((pmd_t) { (x) } ) 34 35static inline pmd_t *pud_pgtable(pud_t pud) 36{ 37 return (pmd_t *)(unsigned long)pud_val(pud); 38} 39 40/* only used by the stubbed out hugetlb gup code, should never be called */ 41#define pud_page(pud) NULL 42#define pud_none(x) (!pud_val(x)) 43#define pud_present(x) (pud_val(x)) 44#define pud_clear(xp) do { set_pud(xp, __pud(0)); } while (0) 45#define pud_bad(x) (pud_val(x) & ~PAGE_MASK) 46 47/* 48 * (puds are folded into pgds so this doesn't get actually called, 49 * but the define is needed for a generic inline function.) 50 */ 51#define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0) 52 53#endif /* __ASM_SH_PGTABLE_3LEVEL_H */ 54