1 #ifndef _X8664_TLBFLUSH_H
2 #define _X8664_TLBFLUSH_H
4 #include <linux/config.h>
6 #include <asm/processor.h>
8 #define __flush_tlb() \
10 unsigned long tmpreg; \
12 __asm__ __volatile__( \
13 "movq %%cr3, %0; # flush TLB \n" \
14 "movq %0, %%cr3; \n" \
20 * Global pages have to be flushed a bit differently. Not a real
21 * performance problem because this does not happen often.
23 #define __flush_tlb_global() \
25 unsigned long tmpreg, cr4, cr4_orig; \
27 __asm__ __volatile__( \
28 "movq %%cr4, %2; # turn off PGE \n" \
31 "movq %1, %%cr4; \n" \
32 "movq %%cr3, %0; # flush TLB \n" \
33 "movq %0, %%cr3; \n" \
34 "movq %2, %%cr4; # turn PGE back on \n" \
35 : "=&r" (tmpreg), "=&r" (cr4), "=&r" (cr4_orig) \
36 : "i" (~X86_CR4_PGE) \
40 extern unsigned long pgkern_mask;
42 #define __flush_tlb_all() __flush_tlb_global()
44 #define __flush_tlb_one(addr) \
45 __asm__ __volatile__("invlpg %0": :"m" (*(char *) addr))
51 * - flush_tlb() flushes the current mm struct TLBs
52 * - flush_tlb_all() flushes all processes TLBs
53 * - flush_tlb_mm(mm) flushes the specified mm context TLB's
54 * - flush_tlb_page(vma, vmaddr) flushes one page
55 * - flush_tlb_range(vma, start, end) flushes a range of pages
56 * - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
57 * - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
59 * ..but the x86_64 has somewhat limited tlb flushing capabilities,
60 * and page-granular flushes are available only on i486 and up.
65 #define flush_tlb() __flush_tlb()
66 #define flush_tlb_all() __flush_tlb_all()
67 #define local_flush_tlb() __flush_tlb()
69 static inline void flush_tlb_mm(struct mm_struct *mm)
71 if (mm == current->active_mm)
75 static inline void flush_tlb_page(struct vm_area_struct *vma,
78 if (vma->vm_mm == current->active_mm)
79 __flush_tlb_one(addr);
82 static inline void flush_tlb_range(struct vm_area_struct *vma,
83 unsigned long start, unsigned long end)
85 if (vma->vm_mm == current->active_mm)
93 #define local_flush_tlb() \
96 extern void flush_tlb_all(void);
97 extern void flush_tlb_current_task(void);
98 extern void flush_tlb_mm(struct mm_struct *);
99 extern void flush_tlb_page(struct vm_area_struct *, unsigned long);
101 #define flush_tlb() flush_tlb_current_task()
103 static inline void flush_tlb_range(struct vm_area_struct * vma, unsigned long start, unsigned long end)
105 flush_tlb_mm(vma->vm_mm);
108 #define TLBSTATE_OK 1
109 #define TLBSTATE_LAZY 2
113 #define flush_tlb_kernel_range(start, end) flush_tlb_all()
115 static inline void flush_tlb_pgtables(struct mm_struct *mm,
116 unsigned long start, unsigned long end)
118 /* x86_64 does not keep any page table caches in TLB */
121 #endif /* _X8664_TLBFLUSH_H */