1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _ASM_POWERPC_PGTABLE_H 3#define _ASM_POWERPC_PGTABLE_H 4 5#ifndef __ASSEMBLY__ 6#include <linux/mmdebug.h> 7#include <linux/mmzone.h> 8#include <asm/processor.h> /* For TASK_SIZE */ 9#include <asm/mmu.h> 10#include <asm/page.h> 11#include <asm/tlbflush.h> 12 13struct mm_struct; 14 15#endif /* !__ASSEMBLY__ */ 16 17#ifdef CONFIG_PPC_BOOK3S 18#include <asm/book3s/pgtable.h> 19#else 20#include <asm/nohash/pgtable.h> 21#endif /* !CONFIG_PPC_BOOK3S */ 22 23/* Note due to the way vm flags are laid out, the bits are XWR */ 24#define __P000 PAGE_NONE 25#define __P001 PAGE_READONLY 26#define __P010 PAGE_COPY 27#define __P011 PAGE_COPY 28#define __P100 PAGE_READONLY_X 29#define __P101 PAGE_READONLY_X 30#define __P110 PAGE_COPY_X 31#define __P111 PAGE_COPY_X 32 33#define __S000 PAGE_NONE 34#define __S001 PAGE_READONLY 35#define __S010 PAGE_SHARED 36#define __S011 PAGE_SHARED 37#define __S100 PAGE_READONLY_X 38#define __S101 PAGE_READONLY_X 39#define __S110 PAGE_SHARED_X 40#define __S111 PAGE_SHARED_X 41 42#ifndef __ASSEMBLY__ 43 44#include <asm/tlbflush.h> 45 46/* Keep these as a macros to avoid include dependency mess */ 47#define pte_page(x) pfn_to_page(pte_pfn(x)) 48#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) 49/* 50 * Select all bits except the pfn 51 */ 52static inline pgprot_t pte_pgprot(pte_t pte) 53{ 54 unsigned long pte_flags; 55 56 pte_flags = pte_val(pte) & ~PTE_RPN_MASK; 57 return __pgprot(pte_flags); 58} 59 60/* 61 * ZERO_PAGE is a global shared page that is always zero: used 62 * for zero-mapped memory areas etc.. 63 */ 64extern unsigned long empty_zero_page[]; 65#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) 66 67extern pgd_t swapper_pg_dir[]; 68 69extern void paging_init(void); 70 71extern unsigned long ioremap_bot; 72 73/* 74 * kern_addr_valid is intended to indicate whether an address is a valid 75 * kernel address. Most 32-bit archs define it as always true (like this) 76 * but most 64-bit archs actually perform a test. What should we do here? 77 */ 78#define kern_addr_valid(addr) (1) 79 80#include <asm-generic/pgtable.h> 81 82#ifndef CONFIG_TRANSPARENT_HUGEPAGE 83#define pmd_large(pmd) 0 84#endif 85 86/* can we use this in kvm */ 87unsigned long vmalloc_to_phys(void *vmalloc_addr); 88 89void pgtable_cache_add(unsigned int shift); 90 91#if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_PPC32) 92void mark_initmem_nx(void); 93#else 94static inline void mark_initmem_nx(void) { } 95#endif 96 97#ifdef CONFIG_PPC_DEBUG_WX 98void ptdump_check_wx(void); 99#else 100static inline void ptdump_check_wx(void) { } 101#endif 102 103/* 104 * When used, PTE_FRAG_NR is defined in subarch pgtable.h 105 * so we are sure it is included when arriving here. 106 */ 107#ifdef PTE_FRAG_NR 108static inline void *pte_frag_get(mm_context_t *ctx) 109{ 110 return ctx->pte_frag; 111} 112 113static inline void pte_frag_set(mm_context_t *ctx, void *p) 114{ 115 ctx->pte_frag = p; 116} 117#else 118#define PTE_FRAG_NR 1 119#define PTE_FRAG_SIZE_SHIFT PAGE_SHIFT 120#define PTE_FRAG_SIZE (1UL << PTE_FRAG_SIZE_SHIFT) 121 122static inline void *pte_frag_get(mm_context_t *ctx) 123{ 124 return NULL; 125} 126 127static inline void pte_frag_set(mm_context_t *ctx, void *p) 128{ 129} 130#endif 131 132#ifndef pmd_is_leaf 133#define pmd_is_leaf pmd_is_leaf 134static inline bool pmd_is_leaf(pmd_t pmd) 135{ 136 return false; 137} 138#endif 139 140#ifndef pud_is_leaf 141#define pud_is_leaf pud_is_leaf 142static inline bool pud_is_leaf(pud_t pud) 143{ 144 return false; 145} 146#endif 147 148#ifndef pgd_is_leaf 149#define pgd_is_leaf pgd_is_leaf 150static inline bool pgd_is_leaf(pgd_t pgd) 151{ 152 return false; 153} 154#endif 155 156#ifdef CONFIG_PPC64 157#define is_ioremap_addr is_ioremap_addr 158static inline bool is_ioremap_addr(const void *x) 159{ 160#ifdef CONFIG_MMU 161 unsigned long addr = (unsigned long)x; 162 163 return addr >= IOREMAP_BASE && addr < IOREMAP_END; 164#else 165 return false; 166#endif 167} 168#endif /* CONFIG_PPC64 */ 169 170#endif /* __ASSEMBLY__ */ 171 172#endif /* _ASM_POWERPC_PGTABLE_H */ 173