| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Copyright (C) 2012 Regents of the University of California |
| */ |
| |
| #ifndef _ASM_RISCV_PGTABLE_64_H |
| #define _ASM_RISCV_PGTABLE_64_H |
| |
| #include <linux/const.h> |
| |
| #define PGDIR_SHIFT 30 |
| /* Size of region mapped by a page global directory */ |
| #define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT) |
| #define PGDIR_MASK (~(PGDIR_SIZE - 1)) |
| |
| #define PMD_SHIFT 21 |
| /* Size of region mapped by a page middle directory */ |
| #define PMD_SIZE (_AC(1, UL) << PMD_SHIFT) |
| #define PMD_MASK (~(PMD_SIZE - 1)) |
| |
| /* Page Middle Directory entry */ |
| typedef struct { |
| unsigned long pmd; |
| } pmd_t; |
| |
| #define pmd_val(x) ((x).pmd) |
| #define __pmd(x) ((pmd_t) { (x) }) |
| |
| #define PTRS_PER_PMD (PAGE_SIZE / sizeof(pmd_t)) |
| |
| static inline int pud_present(pud_t pud) |
| { |
| return (pud_val(pud) & _PAGE_PRESENT); |
| } |
| |
| static inline int pud_none(pud_t pud) |
| { |
| return (pud_val(pud) == 0); |
| } |
| |
| static inline int pud_bad(pud_t pud) |
| { |
| return !pud_present(pud); |
| } |
| |
| #define pud_leaf pud_leaf |
| static inline int pud_leaf(pud_t pud) |
| { |
| return pud_present(pud) && (pud_val(pud) & _PAGE_LEAF); |
| } |
| |
| static inline void set_pud(pud_t *pudp, pud_t pud) |
| { |
| *pudp = pud; |
| } |
| |
| static inline void pud_clear(pud_t *pudp) |
| { |
| set_pud(pudp, __pud(0)); |
| } |
| |
| static inline pmd_t *pud_pgtable(pud_t pud) |
| { |
| return (pmd_t *)pfn_to_virt(pud_val(pud) >> _PAGE_PFN_SHIFT); |
| } |
| |
| static inline struct page *pud_page(pud_t pud) |
| { |
| return pfn_to_page(pud_val(pud) >> _PAGE_PFN_SHIFT); |
| } |
| |
| static inline pmd_t pfn_pmd(unsigned long pfn, pgprot_t prot) |
| { |
| return __pmd((pfn << _PAGE_PFN_SHIFT) | pgprot_val(prot)); |
| } |
| |
| static inline unsigned long _pmd_pfn(pmd_t pmd) |
| { |
| return pmd_val(pmd) >> _PAGE_PFN_SHIFT; |
| } |
| |
| #define mk_pmd(page, prot) pfn_pmd(page_to_pfn(page), prot) |
| |
| #define pmd_ERROR(e) \ |
| pr_err("%s:%d: bad pmd %016lx.\n", __FILE__, __LINE__, pmd_val(e)) |
| |
| #endif /* _ASM_RISCV_PGTABLE_64_H */ |