87 строки
1.8 KiB
C
87 строки
1.8 KiB
C
/* 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_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 */
|