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