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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 | #ifndef __ASM_SH_TLB_H #define __ASM_SH_TLB_H #ifdef CONFIG_SUPERH64 # include "tlb_64.h" #endif #ifndef __ASSEMBLY__ #include <linux/pagemap.h> #ifdef CONFIG_MMU #include <asm/pgalloc.h> #include <asm/tlbflush.h> #include <asm/mmu_context.h> /* * TLB handling. This allows us to remove pages from the page * tables, and efficiently handle the TLB issues. */ struct mmu_gather { struct mm_struct *mm; unsigned int fullmm; unsigned long start, end; }; DECLARE_PER_CPU(struct mmu_gather, mmu_gathers); static inline void init_tlb_gather(struct mmu_gather *tlb) { tlb->start = TASK_SIZE; tlb->end = 0; if (tlb->fullmm) { tlb->start = 0; tlb->end = TASK_SIZE; } } static inline struct mmu_gather * tlb_gather_mmu(struct mm_struct *mm, unsigned int full_mm_flush) { struct mmu_gather *tlb = &get_cpu_var(mmu_gathers); tlb->mm = mm; tlb->fullmm = full_mm_flush; init_tlb_gather(tlb); return tlb; } static inline void tlb_finish_mmu(struct mmu_gather *tlb, unsigned long start, unsigned long end) { if (tlb->fullmm) flush_tlb_mm(tlb->mm); /* keep the page table cache within bounds */ check_pgt_cache(); put_cpu_var(mmu_gathers); } static inline void tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep, unsigned long address) { if (tlb->start > address) tlb->start = address; if (tlb->end < address + PAGE_SIZE) tlb->end = address + PAGE_SIZE; } /* * In the case of tlb vma handling, we can optimise these away in the * case where we're doing a full MM flush. When we're doing a munmap, * the vmas are adjusted to only cover the region to be torn down. */ static inline void tlb_start_vma(struct mmu_gather *tlb, struct vm_area_struct *vma) { if (!tlb->fullmm) flush_cache_range(vma, vma->vm_start, vma->vm_end); } static inline void tlb_end_vma(struct mmu_gather *tlb, struct vm_area_struct *vma) { if (!tlb->fullmm && tlb->end) { flush_tlb_range(vma, tlb->start, tlb->end); init_tlb_gather(tlb); } } #define tlb_remove_page(tlb,page) free_page_and_swap_cache(page) #define pte_free_tlb(tlb, ptep, addr) pte_free((tlb)->mm, ptep) #define pmd_free_tlb(tlb, pmdp, addr) pmd_free((tlb)->mm, pmdp) #define pud_free_tlb(tlb, pudp, addr) pud_free((tlb)->mm, pudp) #define tlb_migrate_finish(mm) do { } while (0) #if defined(CONFIG_CPU_SH4) || defined(CONFIG_SUPERH64) extern void tlb_wire_entry(struct vm_area_struct *, unsigned long, pte_t); extern void tlb_unwire_entry(void); #else static inline void tlb_wire_entry(struct vm_area_struct *vma , unsigned long addr, pte_t pte) { BUG(); } static inline void tlb_unwire_entry(void) { BUG(); } #endif #else /* CONFIG_MMU */ #define tlb_start_vma(tlb, vma) do { } while (0) #define tlb_end_vma(tlb, vma) do { } while (0) #define __tlb_remove_tlb_entry(tlb, pte, address) do { } while (0) #define tlb_flush(tlb) do { } while (0) #include <asm-generic/tlb.h> #endif /* CONFIG_MMU */ #endif /* __ASSEMBLY__ */ #endif /* __ASM_SH_TLB_H */ |