18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 28c2ecf20Sopenharmony_ci#ifndef __ASM_SH_PGTABLE_3LEVEL_H 38c2ecf20Sopenharmony_ci#define __ASM_SH_PGTABLE_3LEVEL_H 48c2ecf20Sopenharmony_ci 58c2ecf20Sopenharmony_ci#include <asm-generic/pgtable-nopud.h> 68c2ecf20Sopenharmony_ci 78c2ecf20Sopenharmony_ci/* 88c2ecf20Sopenharmony_ci * Some cores need a 3-level page table layout, for example when using 98c2ecf20Sopenharmony_ci * 64-bit PTEs and 4K pages. 108c2ecf20Sopenharmony_ci */ 118c2ecf20Sopenharmony_ci#define PAGETABLE_LEVELS 3 128c2ecf20Sopenharmony_ci 138c2ecf20Sopenharmony_ci#define PTE_MAGNITUDE 3 /* 64-bit PTEs on SH-X2 TLB */ 148c2ecf20Sopenharmony_ci 158c2ecf20Sopenharmony_ci/* PGD bits */ 168c2ecf20Sopenharmony_ci#define PGDIR_SHIFT 30 178c2ecf20Sopenharmony_ci 188c2ecf20Sopenharmony_ci#define PTRS_PER_PGD 4 198c2ecf20Sopenharmony_ci#define USER_PTRS_PER_PGD 2 208c2ecf20Sopenharmony_ci 218c2ecf20Sopenharmony_ci/* PMD bits */ 228c2ecf20Sopenharmony_ci#define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT - PTE_MAGNITUDE)) 238c2ecf20Sopenharmony_ci#define PMD_SIZE (1UL << PMD_SHIFT) 248c2ecf20Sopenharmony_ci#define PMD_MASK (~(PMD_SIZE-1)) 258c2ecf20Sopenharmony_ci 268c2ecf20Sopenharmony_ci#define PTRS_PER_PMD ((1 << PGDIR_SHIFT) / PMD_SIZE) 278c2ecf20Sopenharmony_ci 288c2ecf20Sopenharmony_ci#define pmd_ERROR(e) \ 298c2ecf20Sopenharmony_ci printk("%s:%d: bad pmd %016llx.\n", __FILE__, __LINE__, pmd_val(e)) 308c2ecf20Sopenharmony_ci 318c2ecf20Sopenharmony_citypedef struct { unsigned long long pmd; } pmd_t; 328c2ecf20Sopenharmony_ci#define pmd_val(x) ((x).pmd) 338c2ecf20Sopenharmony_ci#define __pmd(x) ((pmd_t) { (x) } ) 348c2ecf20Sopenharmony_ci 358c2ecf20Sopenharmony_cistatic inline pmd_t *pud_pgtable(pud_t pud) 368c2ecf20Sopenharmony_ci{ 378c2ecf20Sopenharmony_ci return (pmd_t *)(unsigned long)pud_val(pud); 388c2ecf20Sopenharmony_ci} 398c2ecf20Sopenharmony_ci 408c2ecf20Sopenharmony_ci/* only used by the stubbed out hugetlb gup code, should never be called */ 418c2ecf20Sopenharmony_ci#define pud_page(pud) NULL 428c2ecf20Sopenharmony_ci#define pud_none(x) (!pud_val(x)) 438c2ecf20Sopenharmony_ci#define pud_present(x) (pud_val(x)) 448c2ecf20Sopenharmony_ci#define pud_clear(xp) do { set_pud(xp, __pud(0)); } while (0) 458c2ecf20Sopenharmony_ci#define pud_bad(x) (pud_val(x) & ~PAGE_MASK) 468c2ecf20Sopenharmony_ci 478c2ecf20Sopenharmony_ci/* 488c2ecf20Sopenharmony_ci * (puds are folded into pgds so this doesn't get actually called, 498c2ecf20Sopenharmony_ci * but the define is needed for a generic inline function.) 508c2ecf20Sopenharmony_ci */ 518c2ecf20Sopenharmony_ci#define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0) 528c2ecf20Sopenharmony_ci 538c2ecf20Sopenharmony_ci#endif /* __ASM_SH_PGTABLE_3LEVEL_H */ 54