/* 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); } 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_PFN_SHIFT); } #define pmd_index(addr) (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1)) static inline pmd_t *pmd_offset(pud_t *pud, unsigned long addr) { return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(addr); } 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 */