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86 lines
1.8 KiB
86 lines
1.8 KiB
/* 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 unsigned long pud_page_vaddr(pud_t pud) |
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{ |
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return (unsigned long)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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