1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_POWERPC_PGTABLE_H
3 #define _ASM_POWERPC_PGTABLE_H
6 #include <linux/mmdebug.h>
7 #include <linux/mmzone.h>
8 #include <asm/processor.h> /* For TASK_SIZE */
11 #include <asm/tlbflush.h>
15 #endif /* !__ASSEMBLY__ */
17 #ifdef CONFIG_PPC_BOOK3S
18 #include <asm/book3s/pgtable.h>
20 #include <asm/nohash/pgtable.h>
21 #endif /* !CONFIG_PPC_BOOK3S */
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
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
44 /* Keep these as a macros to avoid include dependency mess */
45 #define pte_page(x) pfn_to_page(pte_pfn(x))
46 #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
48 * Select all bits except the pfn
50 static inline pgprot_t pte_pgprot(pte_t pte)
52 unsigned long pte_flags;
54 pte_flags = pte_val(pte) & ~PTE_RPN_MASK;
55 return __pgprot(pte_flags);
58 #ifndef pmd_page_vaddr
59 static inline unsigned long pmd_page_vaddr(pmd_t pmd)
61 return ((unsigned long)__va(pmd_val(pmd) & ~PMD_MASKED_BITS));
63 #define pmd_page_vaddr pmd_page_vaddr
66 * ZERO_PAGE is a global shared page that is always zero: used
67 * for zero-mapped memory areas etc..
69 extern unsigned long empty_zero_page[];
70 #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
72 extern pgd_t swapper_pg_dir[];
74 extern void paging_init(void);
76 extern unsigned long ioremap_bot;
79 * kern_addr_valid is intended to indicate whether an address is a valid
80 * kernel address. Most 32-bit archs define it as always true (like this)
81 * but most 64-bit archs actually perform a test. What should we do here?
83 #define kern_addr_valid(addr) (1)
85 #ifndef CONFIG_TRANSPARENT_HUGEPAGE
86 #define pmd_large(pmd) 0
89 /* can we use this in kvm */
90 unsigned long vmalloc_to_phys(void *vmalloc_addr);
92 void pgtable_cache_add(unsigned int shift);
94 pte_t *early_pte_alloc_kernel(pmd_t *pmdp, unsigned long va);
96 #if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_PPC32)
97 void mark_initmem_nx(void);
99 static inline void mark_initmem_nx(void) { }
103 * When used, PTE_FRAG_NR is defined in subarch pgtable.h
104 * so we are sure it is included when arriving here.
107 static inline void *pte_frag_get(mm_context_t *ctx)
109 return ctx->pte_frag;
112 static inline void pte_frag_set(mm_context_t *ctx, void *p)
117 #define PTE_FRAG_NR 1
118 #define PTE_FRAG_SIZE_SHIFT PAGE_SHIFT
119 #define PTE_FRAG_SIZE (1UL << PTE_FRAG_SIZE_SHIFT)
121 static inline void *pte_frag_get(mm_context_t *ctx)
126 static inline void pte_frag_set(mm_context_t *ctx, void *p)
132 #define pmd_is_leaf pmd_is_leaf
133 static inline bool pmd_is_leaf(pmd_t pmd)
140 #define pud_is_leaf pud_is_leaf
141 static inline bool pud_is_leaf(pud_t pud)
148 #define p4d_is_leaf p4d_is_leaf
149 static inline bool p4d_is_leaf(p4d_t p4d)
155 #define pmd_pgtable pmd_pgtable
156 static inline pgtable_t pmd_pgtable(pmd_t pmd)
158 return (pgtable_t)pmd_page_vaddr(pmd);
162 #define is_ioremap_addr is_ioremap_addr
163 static inline bool is_ioremap_addr(const void *x)
165 unsigned long addr = (unsigned long)x;
167 return addr >= IOREMAP_BASE && addr < IOREMAP_END;
171 void arch_report_meminfo(struct seq_file *m);
172 #endif /* CONFIG_PPC64 */
174 #endif /* __ASSEMBLY__ */
176 #endif /* _ASM_POWERPC_PGTABLE_H */