1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * Copyright (C) 2012 Regents of the University of California 4 */ 5 6#ifndef _ASM_RISCV_PGTABLE_64_H 7#define _ASM_RISCV_PGTABLE_64_H 8 9#include <linux/const.h> 10 11#define PGDIR_SHIFT 30 12/* Size of region mapped by a page global directory */ 13#define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT) 14#define PGDIR_MASK (~(PGDIR_SIZE - 1)) 15 16#define PMD_SHIFT 21 17/* Size of region mapped by a page middle directory */ 18#define PMD_SIZE (_AC(1, UL) << PMD_SHIFT) 19#define PMD_MASK (~(PMD_SIZE - 1)) 20 21/* Page Middle Directory entry */ 22typedef struct { 23 unsigned long pmd; 24} pmd_t; 25 26#define pmd_val(x) ((x).pmd) 27#define __pmd(x) ((pmd_t) { (x) }) 28 29#define PTRS_PER_PMD (PAGE_SIZE / sizeof(pmd_t)) 30 31static inline int pud_present(pud_t pud) 32{ 33 return (pud_val(pud) & _PAGE_PRESENT); 34} 35 36static inline int pud_none(pud_t pud) 37{ 38 return (pud_val(pud) == 0); 39} 40 41static inline int pud_bad(pud_t pud) 42{ 43 return !pud_present(pud); 44} 45 46#define pud_leaf pud_leaf 47static inline int pud_leaf(pud_t pud) 48{ 49 return pud_present(pud) && 50 (pud_val(pud) & (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC)); 51} 52 53static inline void set_pud(pud_t *pudp, pud_t pud) 54{ 55 *pudp = pud; 56} 57 58static inline void pud_clear(pud_t *pudp) 59{ 60 set_pud(pudp, __pud(0)); 61} 62 63static inline unsigned long pud_page_vaddr(pud_t pud) 64{ 65 return (unsigned long)pfn_to_virt(pud_val(pud) >> _PAGE_PFN_SHIFT); 66} 67 68static inline struct page *pud_page(pud_t pud) 69{ 70 return pfn_to_page(pud_val(pud) >> _PAGE_PFN_SHIFT); 71} 72 73static inline pmd_t pfn_pmd(unsigned long pfn, pgprot_t prot) 74{ 75 return __pmd((pfn << _PAGE_PFN_SHIFT) | pgprot_val(prot)); 76} 77 78static inline unsigned long _pmd_pfn(pmd_t pmd) 79{ 80 return pmd_val(pmd) >> _PAGE_PFN_SHIFT; 81} 82 83#define pmd_ERROR(e) \ 84 pr_err("%s:%d: bad pmd %016lx.\n", __FILE__, __LINE__, pmd_val(e)) 85 86#endif /* _ASM_RISCV_PGTABLE_64_H */ 87