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