| 1 | #ifndef _I386_TLBFLUSH_H |
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| 2 | #define _I386_TLBFLUSH_H |
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| 3 | |
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| 4 | #include <linux/mm.h> |
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| 5 | #include <asm/processor.h> |
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| 6 | |
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| 7 | #define __flush_tlb() xen_tlb_flush() |
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| 8 | #define __flush_tlb_global() xen_tlb_flush() |
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| 9 | #define __flush_tlb_all() xen_tlb_flush() |
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| 10 | |
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| 11 | extern unsigned long pgkern_mask; |
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| 12 | |
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| 13 | #define cpu_has_invlpg (boot_cpu_data.x86 > 3) |
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| 14 | |
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| 15 | #define __flush_tlb_single(addr) xen_invlpg(addr) |
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| 16 | |
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| 17 | #define __flush_tlb_one(addr) __flush_tlb_single(addr) |
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| 18 | |
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| 19 | /* |
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| 20 | * TLB flushing: |
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| 21 | * |
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| 22 | * - flush_tlb() flushes the current mm struct TLBs |
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| 23 | * - flush_tlb_all() flushes all processes TLBs |
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| 24 | * - flush_tlb_mm(mm) flushes the specified mm context TLB's |
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| 25 | * - flush_tlb_page(vma, vmaddr) flushes one page |
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| 26 | * - flush_tlb_range(vma, start, end) flushes a range of pages |
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| 27 | * - flush_tlb_kernel_range(start, end) flushes a range of kernel pages |
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| 28 | * - flush_tlb_pgtables(mm, start, end) flushes a range of page tables |
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| 29 | * |
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| 30 | * ..but the i386 has somewhat limited tlb flushing capabilities, |
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| 31 | * and page-granular flushes are available only on i486 and up. |
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| 32 | */ |
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| 33 | |
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| 34 | #ifndef CONFIG_SMP |
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| 35 | |
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| 36 | #define flush_tlb() __flush_tlb() |
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| 37 | #define flush_tlb_all() __flush_tlb_all() |
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| 38 | #define local_flush_tlb() __flush_tlb() |
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| 39 | |
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| 40 | static inline void flush_tlb_mm(struct mm_struct *mm) |
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| 41 | { |
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| 42 | if (mm == current->active_mm) |
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| 43 | __flush_tlb(); |
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| 44 | } |
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| 45 | |
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| 46 | static inline void flush_tlb_page(struct vm_area_struct *vma, |
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| 47 | unsigned long addr) |
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| 48 | { |
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| 49 | if (vma->vm_mm == current->active_mm) |
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| 50 | __flush_tlb_one(addr); |
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| 51 | } |
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| 52 | |
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| 53 | static inline void flush_tlb_range(struct vm_area_struct *vma, |
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| 54 | unsigned long start, unsigned long end) |
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| 55 | { |
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| 56 | if (vma->vm_mm == current->active_mm) |
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| 57 | __flush_tlb(); |
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| 58 | } |
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| 59 | |
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| 60 | #else |
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| 61 | |
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| 62 | #include <asm/smp.h> |
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| 63 | |
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| 64 | #define local_flush_tlb() \ |
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| 65 | __flush_tlb() |
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| 66 | |
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| 67 | extern void flush_tlb_all(void); |
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| 68 | extern void flush_tlb_current_task(void); |
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| 69 | extern void flush_tlb_mm(struct mm_struct *); |
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| 70 | extern void flush_tlb_page(struct vm_area_struct *, unsigned long); |
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| 71 | |
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| 72 | #define flush_tlb() flush_tlb_current_task() |
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| 73 | |
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| 74 | static inline void flush_tlb_range(struct vm_area_struct * vma, unsigned long start, unsigned long end) |
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| 75 | { |
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| 76 | flush_tlb_mm(vma->vm_mm); |
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| 77 | } |
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| 78 | |
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| 79 | #define TLBSTATE_OK 1 |
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| 80 | #define TLBSTATE_LAZY 2 |
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| 81 | |
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| 82 | struct tlb_state |
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| 83 | { |
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| 84 | struct mm_struct *active_mm; |
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| 85 | int state; |
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| 86 | char __cacheline_padding[L1_CACHE_BYTES-8]; |
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| 87 | }; |
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| 88 | DECLARE_PER_CPU(struct tlb_state, cpu_tlbstate); |
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| 89 | |
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| 90 | |
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| 91 | #endif |
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| 92 | |
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| 93 | #define flush_tlb_kernel_range(start, end) flush_tlb_all() |
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| 94 | |
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| 95 | static inline void flush_tlb_pgtables(struct mm_struct *mm, |
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| 96 | unsigned long start, unsigned long end) |
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| 97 | { |
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| 98 | /* i386 does not keep any page table caches in TLB */ |
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| 99 | } |
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| 100 | |
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| 101 | #endif /* _I386_TLBFLUSH_H */ |
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