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181 lines
4.0 KiB
181 lines
4.0 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _ASM_POWERPC_PGTABLE_H |
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#define _ASM_POWERPC_PGTABLE_H |
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#ifndef __ASSEMBLY__ |
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#include <linux/mmdebug.h> |
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#include <linux/mmzone.h> |
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#include <asm/processor.h> /* For TASK_SIZE */ |
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#include <asm/mmu.h> |
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#include <asm/page.h> |
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#include <asm/tlbflush.h> |
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struct mm_struct; |
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#endif /* !__ASSEMBLY__ */ |
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#ifdef CONFIG_PPC_BOOK3S |
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#include <asm/book3s/pgtable.h> |
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#else |
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#include <asm/nohash/pgtable.h> |
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#endif /* !CONFIG_PPC_BOOK3S */ |
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/* Note due to the way vm flags are laid out, the bits are XWR */ |
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#define __P000 PAGE_NONE |
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#define __P001 PAGE_READONLY |
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#define __P010 PAGE_COPY |
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#define __P011 PAGE_COPY |
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#define __P100 PAGE_READONLY_X |
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#define __P101 PAGE_READONLY_X |
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#define __P110 PAGE_COPY_X |
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#define __P111 PAGE_COPY_X |
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#define __S000 PAGE_NONE |
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#define __S001 PAGE_READONLY |
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#define __S010 PAGE_SHARED |
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#define __S011 PAGE_SHARED |
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#define __S100 PAGE_READONLY_X |
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#define __S101 PAGE_READONLY_X |
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#define __S110 PAGE_SHARED_X |
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#define __S111 PAGE_SHARED_X |
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#ifndef __ASSEMBLY__ |
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#ifndef MAX_PTRS_PER_PGD |
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#define MAX_PTRS_PER_PGD PTRS_PER_PGD |
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#endif |
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/* Keep these as a macros to avoid include dependency mess */ |
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#define pte_page(x) pfn_to_page(pte_pfn(x)) |
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#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) |
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/* |
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* Select all bits except the pfn |
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*/ |
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static inline pgprot_t pte_pgprot(pte_t pte) |
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{ |
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unsigned long pte_flags; |
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pte_flags = pte_val(pte) & ~PTE_RPN_MASK; |
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return __pgprot(pte_flags); |
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} |
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#ifndef pmd_page_vaddr |
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static inline unsigned long pmd_page_vaddr(pmd_t pmd) |
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{ |
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return ((unsigned long)__va(pmd_val(pmd) & ~PMD_MASKED_BITS)); |
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} |
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#define pmd_page_vaddr pmd_page_vaddr |
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#endif |
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/* |
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* ZERO_PAGE is a global shared page that is always zero: used |
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* for zero-mapped memory areas etc.. |
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*/ |
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extern unsigned long empty_zero_page[]; |
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#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) |
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extern pgd_t swapper_pg_dir[]; |
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extern void paging_init(void); |
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void poking_init(void); |
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extern unsigned long ioremap_bot; |
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/* |
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* kern_addr_valid is intended to indicate whether an address is a valid |
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* kernel address. Most 32-bit archs define it as always true (like this) |
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* but most 64-bit archs actually perform a test. What should we do here? |
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*/ |
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#define kern_addr_valid(addr) (1) |
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#ifndef CONFIG_TRANSPARENT_HUGEPAGE |
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#define pmd_large(pmd) 0 |
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#endif |
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/* can we use this in kvm */ |
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unsigned long vmalloc_to_phys(void *vmalloc_addr); |
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void pgtable_cache_add(unsigned int shift); |
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pte_t *early_pte_alloc_kernel(pmd_t *pmdp, unsigned long va); |
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#if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_PPC32) |
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void mark_initmem_nx(void); |
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#else |
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static inline void mark_initmem_nx(void) { } |
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#endif |
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/* |
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* When used, PTE_FRAG_NR is defined in subarch pgtable.h |
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* so we are sure it is included when arriving here. |
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*/ |
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#ifdef PTE_FRAG_NR |
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static inline void *pte_frag_get(mm_context_t *ctx) |
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{ |
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return ctx->pte_frag; |
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} |
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static inline void pte_frag_set(mm_context_t *ctx, void *p) |
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{ |
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ctx->pte_frag = p; |
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} |
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#else |
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#define PTE_FRAG_NR 1 |
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#define PTE_FRAG_SIZE_SHIFT PAGE_SHIFT |
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#define PTE_FRAG_SIZE (1UL << PTE_FRAG_SIZE_SHIFT) |
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static inline void *pte_frag_get(mm_context_t *ctx) |
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{ |
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return NULL; |
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} |
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static inline void pte_frag_set(mm_context_t *ctx, void *p) |
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{ |
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} |
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#endif |
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#ifndef pmd_is_leaf |
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#define pmd_is_leaf pmd_is_leaf |
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static inline bool pmd_is_leaf(pmd_t pmd) |
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{ |
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return false; |
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} |
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#endif |
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#ifndef pud_is_leaf |
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#define pud_is_leaf pud_is_leaf |
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static inline bool pud_is_leaf(pud_t pud) |
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{ |
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return false; |
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} |
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#endif |
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#ifndef p4d_is_leaf |
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#define p4d_is_leaf p4d_is_leaf |
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static inline bool p4d_is_leaf(p4d_t p4d) |
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{ |
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return false; |
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} |
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#endif |
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#define pmd_pgtable pmd_pgtable |
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static inline pgtable_t pmd_pgtable(pmd_t pmd) |
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{ |
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return (pgtable_t)pmd_page_vaddr(pmd); |
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} |
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#ifdef CONFIG_PPC64 |
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#define is_ioremap_addr is_ioremap_addr |
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static inline bool is_ioremap_addr(const void *x) |
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{ |
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unsigned long addr = (unsigned long)x; |
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return addr >= IOREMAP_BASE && addr < IOREMAP_END; |
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} |
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struct seq_file; |
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void arch_report_meminfo(struct seq_file *m); |
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#endif /* CONFIG_PPC64 */ |
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#endif /* __ASSEMBLY__ */ |
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#endif /* _ASM_POWERPC_PGTABLE_H */
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