name : pgtable-3level.h /* 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 union { struct { unsigned long pmd_low; unsigned long pmd_high; }; unsigned long long pmd; } pmd_t; #define pmd_val(x) ((x).pmd) #define __pmd(x) ((pmd_t) { .pmd = (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 */