| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef __ASM_SH_PGTABLE_3LEVEL_H |
| #define __ASM_SH_PGTABLE_3LEVEL_H |
| |
| #define __ARCH_USE_5LEVEL_HACK |
| #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 unsigned long pud_page_vaddr(pud_t pud) |
| { |
| return pud_val(pud); |
| } |
| |
| /* only used by the stubbed out hugetlb gup code, should never be called */ |
| #define pud_page(pud) NULL |
| |
| #define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)) |
| static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) |
| { |
| return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address); |
| } |
| |
| #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 */ |