mirror of https://gitee.com/openkylin/linux.git
146 lines
3.5 KiB
C
146 lines
3.5 KiB
C
/* 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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#include <asm/tlbflush.h>
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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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/*
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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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/*
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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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#include <asm-generic/pgtable.h>
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/*
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* This gets called at the end of handling a page fault, when
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* the kernel has put a new PTE into the page table for the process.
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* We use it to ensure coherency between the i-cache and d-cache
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* for the page which has just been mapped in.
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* On machines which use an MMU hash table, we use this to put a
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* corresponding HPTE into the hash table ahead of time, instead of
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* waiting for the inevitable extra hash-table miss exception.
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*/
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extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *);
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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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void pgtable_cache_init(void);
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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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#ifdef CONFIG_PPC_DEBUG_WX
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void ptdump_check_wx(void);
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#else
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static inline void ptdump_check_wx(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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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_POWERPC_PGTABLE_H */
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