Viewing file:  pgtable-3level.h (1.43 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_SH_PGTABLE_3LEVEL_H
#define __ASM_SH_PGTABLE_3LEVEL_H
#include <asm-generic/pgtable-nopud.h>
/*
* Some cores need a 3-level page table layout, for example when using
* 64-bit PTEs and 4K pages.
*/
#define PAGETABLE_LEVELS 3
#define PTE_MAGNITUDE 3 /* 64-bit PTEs on SH-X2 TLB */
/* PGD bits */
#define PGDIR_SHIFT 30
#define PTRS_PER_PGD 4
#define USER_PTRS_PER_PGD 2
/* PMD bits */
#define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT - PTE_MAGNITUDE))
#define PMD_SIZE (1UL << PMD_SHIFT)
#define PMD_MASK (~(PMD_SIZE-1))
#define PTRS_PER_PMD ((1 << PGDIR_SHIFT) / PMD_SIZE)
#define pmd_ERROR(e) \
printk("%s:%d: bad pmd %016llx.\n", __FILE__, __LINE__, pmd_val(e))
typedef struct { unsigned long long pmd; } pmd_t;
#define pmd_val(x) ((x).pmd)
#define __pmd(x) ((pmd_t) { (x) } )
static inline pmd_t *pud_pgtable(pud_t pud)
{
return (pmd_t *)(unsigned long)pud_val(pud);
}
/* only used by the stubbed out hugetlb gup code, should never be called */
#define pud_page(pud) NULL
#define pud_none(x) (!pud_val(x))
#define pud_present(x) (pud_val(x))
#define pud_clear(xp) do { set_pud(xp, __pud(0)); } while (0)
#define pud_bad(x) (pud_val(x) & ~PAGE_MASK)
/*
* (puds are folded into pgds so this doesn't get actually called,
* but the define is needed for a generic inline function.)
*/
#define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0)
#endif /* __ASM_SH_PGTABLE_3LEVEL_H */
|