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53 lines
1.4 KiB
53 lines
1.4 KiB
/* 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 struct { unsigned long long pmd; } 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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static inline unsigned long pud_page_vaddr(pud_t pud) |
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{ |
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return 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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