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#ifndef MAX_PTRS_PER_PGD 45#define MAX_PTRS_PER_PGD PTRS_PER_PGD 46#endif 47 48/* Keep these as a macros to avoid include dependency mess */ 49#define pte_page(x) pfn_to_page(pte_pfn(x)) 50#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) 51/* 52 * Select all bits except the pfn 53 */ 54static inline pgprot_t pte_pgprot(pte_t pte) 55{ 56 unsigned long pte_flags; 57 58 pte_flags = pte_val(pte) & ~PTE_RPN_MASK; 59 return __pgprot(pte_flags); 60} 61 62#ifndef pmd_page_vaddr 63static inline unsigned long pmd_page_vaddr(pmd_t pmd) 64{ 65 return ((unsigned long)__va(pmd_val(pmd) & ~PMD_MASKED_BITS)); 66} 67#define pmd_page_vaddr pmd_page_vaddr 68#endif 69/* 70 * ZERO_PAGE is a global shared page that is always zero: used 71 * for zero-mapped memory areas etc.. 72 */ 73extern unsigned long empty_zero_page[]; 74#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) 75 76extern pgd_t swapper_pg_dir[]; 77 78extern void paging_init(void); 79void poking_init(void); 80 81extern unsigned long ioremap_bot; 82 83/* 84 * kern_addr_valid is intended to indicate whether an address is a valid 85 * kernel address. Most 32-bit archs define it as always true (like this) 86 * but most 64-bit archs actually perform a test. What should we do here? 87 */ 88#define kern_addr_valid(addr) (1) 89 90#ifndef CONFIG_TRANSPARENT_HUGEPAGE 91#define pmd_large(pmd) 0 92#endif 93 94/* can we use this in kvm */ 95unsigned long vmalloc_to_phys(void *vmalloc_addr); 96 97void pgtable_cache_add(unsigned int shift); 98 99pte_t *early_pte_alloc_kernel(pmd_t *pmdp, unsigned long va); 100 101#if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_PPC32) 102void mark_initmem_nx(void); 103#else 104static inline void mark_initmem_nx(void) { } 105#endif 106 107/* 108 * When used, PTE_FRAG_NR is defined in subarch pgtable.h 109 * so we are sure it is included when arriving here. 110 */ 111#ifdef PTE_FRAG_NR 112static inline void *pte_frag_get(mm_context_t *ctx) 113{ 114 return ctx->pte_frag; 115} 116 117static inline void pte_frag_set(mm_context_t *ctx, void *p) 118{ 119 ctx->pte_frag = p; 120} 121#else 122#define PTE_FRAG_NR 1 123#define PTE_FRAG_SIZE_SHIFT PAGE_SHIFT 124#define PTE_FRAG_SIZE (1UL << PTE_FRAG_SIZE_SHIFT) 125 126static inline void *pte_frag_get(mm_context_t *ctx) 127{ 128 return NULL; 129} 130 131static inline void pte_frag_set(mm_context_t *ctx, void *p) 132{ 133} 134#endif 135 136#ifndef pmd_is_leaf 137#define pmd_is_leaf pmd_is_leaf 138static inline bool pmd_is_leaf(pmd_t pmd) 139{ 140 return false; 141} 142#endif 143 144#ifndef pud_is_leaf 145#define pud_is_leaf pud_is_leaf 146static inline bool pud_is_leaf(pud_t pud) 147{ 148 return false; 149} 150#endif 151 152#ifndef p4d_is_leaf 153#define p4d_is_leaf p4d_is_leaf 154static inline bool p4d_is_leaf(p4d_t p4d) 155{ 156 return false; 157} 158#endif 159 160#define pmd_pgtable pmd_pgtable 161static inline pgtable_t pmd_pgtable(pmd_t pmd) 162{ 163 return (pgtable_t)pmd_page_vaddr(pmd); 164} 165 166#ifdef CONFIG_PPC64 167#define is_ioremap_addr is_ioremap_addr 168static inline bool is_ioremap_addr(const void *x) 169{ 170 unsigned long addr = (unsigned long)x; 171 172 return addr >= IOREMAP_BASE && addr < IOREMAP_END; 173} 174 175struct seq_file; 176void arch_report_meminfo(struct seq_file *m); 177#endif /* CONFIG_PPC64 */ 178 179#endif /* __ASSEMBLY__ */ 180 181#endif /* _ASM_POWERPC_PGTABLE_H */ 182