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- /* 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_READ | _PAGE_WRITE | _PAGE_EXEC));
- }
- 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 unsigned long pud_page_vaddr(pud_t pud)
- {
- return (unsigned long)pfn_to_virt((pud_val(pud) & _PAGE_CHG_MASK) >> _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 pmd_ERROR(e) \
- pr_err("%s:%d: bad pmd %016lx.\n", __FILE__, __LINE__, pmd_val(e))
- #endif /* _ASM_RISCV_PGTABLE_64_H */
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