1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef __ASM_SH_PGTABLE_3LEVEL_H 3*4882a593Smuzhiyun #define __ASM_SH_PGTABLE_3LEVEL_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #include <asm-generic/pgtable-nopud.h> 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun /* 8*4882a593Smuzhiyun * Some cores need a 3-level page table layout, for example when using 9*4882a593Smuzhiyun * 64-bit PTEs and 4K pages. 10*4882a593Smuzhiyun */ 11*4882a593Smuzhiyun #define PAGETABLE_LEVELS 3 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun #define PTE_MAGNITUDE 3 /* 64-bit PTEs on SH-X2 TLB */ 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun /* PGD bits */ 16*4882a593Smuzhiyun #define PGDIR_SHIFT 30 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun #define PTRS_PER_PGD 4 19*4882a593Smuzhiyun #define USER_PTRS_PER_PGD 2 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun /* PMD bits */ 22*4882a593Smuzhiyun #define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT - PTE_MAGNITUDE)) 23*4882a593Smuzhiyun #define PMD_SIZE (1UL << PMD_SHIFT) 24*4882a593Smuzhiyun #define PMD_MASK (~(PMD_SIZE-1)) 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun #define PTRS_PER_PMD ((1 << PGDIR_SHIFT) / PMD_SIZE) 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun #define pmd_ERROR(e) \ 29*4882a593Smuzhiyun printk("%s:%d: bad pmd %016llx.\n", __FILE__, __LINE__, pmd_val(e)) 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun typedef struct { unsigned long long pmd; } pmd_t; 32*4882a593Smuzhiyun #define pmd_val(x) ((x).pmd) 33*4882a593Smuzhiyun #define __pmd(x) ((pmd_t) { (x) } ) 34*4882a593Smuzhiyun pud_page_vaddr(pud_t pud)35*4882a593Smuzhiyunstatic inline unsigned long pud_page_vaddr(pud_t pud) 36*4882a593Smuzhiyun { 37*4882a593Smuzhiyun return pud_val(pud); 38*4882a593Smuzhiyun } 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun /* only used by the stubbed out hugetlb gup code, should never be called */ 41*4882a593Smuzhiyun #define pud_page(pud) NULL 42*4882a593Smuzhiyun #define pud_none(x) (!pud_val(x)) 43*4882a593Smuzhiyun #define pud_present(x) (pud_val(x)) 44*4882a593Smuzhiyun #define pud_clear(xp) do { set_pud(xp, __pud(0)); } while (0) 45*4882a593Smuzhiyun #define pud_bad(x) (pud_val(x) & ~PAGE_MASK) 46*4882a593Smuzhiyun 47*4882a593Smuzhiyun /* 48*4882a593Smuzhiyun * (puds are folded into pgds so this doesn't get actually called, 49*4882a593Smuzhiyun * but the define is needed for a generic inline function.) 50*4882a593Smuzhiyun */ 51*4882a593Smuzhiyun #define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0) 52*4882a593Smuzhiyun 53*4882a593Smuzhiyun #endif /* __ASM_SH_PGTABLE_3LEVEL_H */ 54