298 lines
6.3 KiB
C
298 lines
6.3 KiB
C
/* 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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extern bool pgtable_l4_enabled;
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extern bool pgtable_l5_enabled;
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#define PGDIR_SHIFT_L3 30
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#define PGDIR_SHIFT_L4 39
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#define PGDIR_SHIFT_L5 48
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#define PGDIR_SIZE_L3 (_AC(1, UL) << PGDIR_SHIFT_L3)
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#define PGDIR_SHIFT (pgtable_l5_enabled ? PGDIR_SHIFT_L5 : \
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(pgtable_l4_enabled ? PGDIR_SHIFT_L4 : PGDIR_SHIFT_L3))
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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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/* p4d is folded into pgd in case of 4-level page table */
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#define P4D_SHIFT 39
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#define P4D_SIZE (_AC(1, UL) << P4D_SHIFT)
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#define P4D_MASK (~(P4D_SIZE - 1))
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/* pud is folded into pgd in case of 3-level page table */
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#define PUD_SHIFT 30
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#define PUD_SIZE (_AC(1, UL) << PUD_SHIFT)
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#define PUD_MASK (~(PUD_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 4th Directory entry */
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typedef struct {
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unsigned long p4d;
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} p4d_t;
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#define p4d_val(x) ((x).p4d)
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#define __p4d(x) ((p4d_t) { (x) })
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#define PTRS_PER_P4D (PAGE_SIZE / sizeof(p4d_t))
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/* Page Upper Directory entry */
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typedef struct {
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unsigned long pud;
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} pud_t;
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#define pud_val(x) ((x).pud)
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#define __pud(x) ((pud_t) { (x) })
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#define PTRS_PER_PUD (PAGE_SIZE / sizeof(pud_t))
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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) && (pud_val(pud) & _PAGE_LEAF);
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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 pud_t pfn_pud(unsigned long pfn, pgprot_t prot)
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{
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return __pud((pfn << _PAGE_PFN_SHIFT) | pgprot_val(prot));
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}
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static inline unsigned long _pud_pfn(pud_t pud)
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{
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return pud_val(pud) >> _PAGE_PFN_SHIFT;
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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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#define mm_p4d_folded mm_p4d_folded
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static inline bool mm_p4d_folded(struct mm_struct *mm)
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{
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if (pgtable_l5_enabled)
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return false;
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return true;
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}
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#define mm_pud_folded mm_pud_folded
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static inline bool mm_pud_folded(struct mm_struct *mm)
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{
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if (pgtable_l4_enabled)
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return false;
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return true;
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}
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#define pmd_index(addr) (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1))
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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 mk_pmd(page, prot) pfn_pmd(page_to_pfn(page), prot)
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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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#define pud_ERROR(e) \
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pr_err("%s:%d: bad pud %016lx.\n", __FILE__, __LINE__, pud_val(e))
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#define p4d_ERROR(e) \
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pr_err("%s:%d: bad p4d %016lx.\n", __FILE__, __LINE__, p4d_val(e))
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static inline void set_p4d(p4d_t *p4dp, p4d_t p4d)
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{
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if (pgtable_l4_enabled)
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*p4dp = p4d;
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else
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set_pud((pud_t *)p4dp, (pud_t){ p4d_val(p4d) });
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}
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static inline int p4d_none(p4d_t p4d)
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{
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if (pgtable_l4_enabled)
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return (p4d_val(p4d) == 0);
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return 0;
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}
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static inline int p4d_present(p4d_t p4d)
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{
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if (pgtable_l4_enabled)
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return (p4d_val(p4d) & _PAGE_PRESENT);
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return 1;
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}
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static inline int p4d_bad(p4d_t p4d)
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{
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if (pgtable_l4_enabled)
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return !p4d_present(p4d);
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return 0;
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}
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static inline void p4d_clear(p4d_t *p4d)
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{
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if (pgtable_l4_enabled)
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set_p4d(p4d, __p4d(0));
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}
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static inline p4d_t pfn_p4d(unsigned long pfn, pgprot_t prot)
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{
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return __p4d((pfn << _PAGE_PFN_SHIFT) | pgprot_val(prot));
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}
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static inline unsigned long _p4d_pfn(p4d_t p4d)
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{
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return p4d_val(p4d) >> _PAGE_PFN_SHIFT;
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}
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static inline pud_t *p4d_pgtable(p4d_t p4d)
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{
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if (pgtable_l4_enabled)
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return (pud_t *)pfn_to_virt(p4d_val(p4d) >> _PAGE_PFN_SHIFT);
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return (pud_t *)pud_pgtable((pud_t) { p4d_val(p4d) });
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}
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#define p4d_page_vaddr(p4d) ((unsigned long)p4d_pgtable(p4d))
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static inline struct page *p4d_page(p4d_t p4d)
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{
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return pfn_to_page(p4d_val(p4d) >> _PAGE_PFN_SHIFT);
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}
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#define pud_index(addr) (((addr) >> PUD_SHIFT) & (PTRS_PER_PUD - 1))
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#define pud_offset pud_offset
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static inline pud_t *pud_offset(p4d_t *p4d, unsigned long address)
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{
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if (pgtable_l4_enabled)
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return p4d_pgtable(*p4d) + pud_index(address);
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return (pud_t *)p4d;
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}
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static inline void set_pgd(pgd_t *pgdp, pgd_t pgd)
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{
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if (pgtable_l5_enabled)
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*pgdp = pgd;
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else
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set_p4d((p4d_t *)pgdp, (p4d_t){ pgd_val(pgd) });
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}
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static inline int pgd_none(pgd_t pgd)
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{
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if (pgtable_l5_enabled)
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return (pgd_val(pgd) == 0);
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return 0;
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}
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static inline int pgd_present(pgd_t pgd)
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{
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if (pgtable_l5_enabled)
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return (pgd_val(pgd) & _PAGE_PRESENT);
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return 1;
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}
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static inline int pgd_bad(pgd_t pgd)
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{
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if (pgtable_l5_enabled)
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return !pgd_present(pgd);
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return 0;
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}
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static inline void pgd_clear(pgd_t *pgd)
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{
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if (pgtable_l5_enabled)
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set_pgd(pgd, __pgd(0));
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}
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static inline p4d_t *pgd_pgtable(pgd_t pgd)
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{
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if (pgtable_l5_enabled)
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return (p4d_t *)pfn_to_virt(pgd_val(pgd) >> _PAGE_PFN_SHIFT);
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return (p4d_t *)p4d_pgtable((p4d_t) { pgd_val(pgd) });
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}
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#define pgd_page_vaddr(pgd) ((unsigned long)pgd_pgtable(pgd))
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static inline struct page *pgd_page(pgd_t pgd)
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{
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return pfn_to_page(pgd_val(pgd) >> _PAGE_PFN_SHIFT);
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}
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#define pgd_page(pgd) pgd_page(pgd)
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#define p4d_index(addr) (((addr) >> P4D_SHIFT) & (PTRS_PER_P4D - 1))
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#define p4d_offset p4d_offset
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static inline p4d_t *p4d_offset(pgd_t *pgd, unsigned long address)
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{
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if (pgtable_l5_enabled)
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return pgd_pgtable(*pgd) + p4d_index(address);
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return (p4d_t *)pgd;
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}
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#endif /* _ASM_RISCV_PGTABLE_64_H */
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