1#ifndef _I386_TLBFLUSH_H 2#define _I386_TLBFLUSH_H 3 4#include <linux/mm.h> 5#include <asm/processor.h> 6 7#ifdef CONFIG_PARAVIRT 8#include <asm/paravirt.h> 9#else 10#define __flush_tlb() __native_flush_tlb() 11#define __flush_tlb_global() __native_flush_tlb_global() 12#define __flush_tlb_single(addr) __native_flush_tlb_single(addr) 13#endif 14 15#define __native_flush_tlb() \ 16 do { \ 17 unsigned int tmpreg; \ 18 \ 19 __asm__ __volatile__( \ 20 "movl %%cr3, %0; \n" \ 21 "movl %0, %%cr3; # flush TLB \n" \ 22 : "=r" (tmpreg) \ 23 :: "memory"); \ 24 } while (0) 25 26/* 27 * Global pages have to be flushed a bit differently. Not a real 28 * performance problem because this does not happen often. 29 */ 30#define __native_flush_tlb_global() \ 31 do { \ 32 unsigned int tmpreg, cr4, cr4_orig; \ 33 \ 34 __asm__ __volatile__( \ 35 "movl %%cr4, %2; # turn off PGE \n" \ 36 "movl %2, %1; \n" \ 37 "andl %3, %1; \n" \ 38 "movl %1, %%cr4; \n" \ 39 "movl %%cr3, %0; \n" \ 40 "movl %0, %%cr3; # flush TLB \n" \ 41 "movl %2, %%cr4; # turn PGE back on \n" \ 42 : "=&r" (tmpreg), "=&r" (cr4), "=&r" (cr4_orig) \ 43 : "i" (~X86_CR4_PGE) \ 44 : "memory"); \ 45 } while (0) 46 47#define __native_flush_tlb_single(addr) \ 48 __asm__ __volatile__("invlpg (%0)" ::"r" (addr) : "memory") 49 50# define __flush_tlb_all() \ 51 do { \ 52 if (cpu_has_pge) \ 53 __flush_tlb_global(); \ 54 else \ 55 __flush_tlb(); \ 56 } while (0) 57 58#define cpu_has_invlpg (boot_cpu_data.x86 > 3) 59 60#ifdef CONFIG_X86_INVLPG 61# define __flush_tlb_one(addr) __flush_tlb_single(addr) 62#else 63# define __flush_tlb_one(addr) \ 64 do { \ 65 if (cpu_has_invlpg) \ 66 __flush_tlb_single(addr); \ 67 else \ 68 __flush_tlb(); \ 69 } while (0) 70#endif 71 72/* 73 * TLB flushing: 74 * 75 * - flush_tlb() flushes the current mm struct TLBs 76 * - flush_tlb_all() flushes all processes TLBs 77 * - flush_tlb_mm(mm) flushes the specified mm context TLB's 78 * - flush_tlb_page(vma, vmaddr) flushes one page 79 * - flush_tlb_range(vma, start, end) flushes a range of pages 80 * - flush_tlb_kernel_range(start, end) flushes a range of kernel pages 81 * - flush_tlb_others(cpumask, mm, va) flushes a TLBs on other cpus 82 * 83 * ..but the i386 has somewhat limited tlb flushing capabilities, 84 * and page-granular flushes are available only on i486 and up. 85 */ 86 87#define TLB_FLUSH_ALL 0xffffffff 88 89 90#ifndef CONFIG_SMP 91 92#include <linux/sched.h> 93 94#define flush_tlb() __flush_tlb() 95#define flush_tlb_all() __flush_tlb_all() 96#define local_flush_tlb() __flush_tlb() 97 98static inline void flush_tlb_mm(struct mm_struct *mm) 99{ 100 if (mm == current->active_mm) 101 __flush_tlb(); 102} 103 104static inline void flush_tlb_page(struct vm_area_struct *vma, 105 unsigned long addr) 106{ 107 if (vma->vm_mm == current->active_mm) 108 __flush_tlb_one(addr); 109} 110 111static inline void flush_tlb_range(struct vm_area_struct *vma, 112 unsigned long start, unsigned long end) 113{ 114 if (vma->vm_mm == current->active_mm) 115 __flush_tlb(); 116} 117 118static inline void native_flush_tlb_others(const cpumask_t *cpumask, 119 struct mm_struct *mm, unsigned long va) 120{ 121} 122 123#else /* SMP */ 124 125#include <asm/smp.h> 126 127#define local_flush_tlb() \ 128 __flush_tlb() 129 130extern void flush_tlb_all(void); 131extern void flush_tlb_current_task(void); 132extern void flush_tlb_mm(struct mm_struct *); 133extern void flush_tlb_page(struct vm_area_struct *, unsigned long); 134 135#define flush_tlb() flush_tlb_current_task() 136 137static inline void flush_tlb_range(struct vm_area_struct * vma, unsigned long start, unsigned long end) 138{ 139 flush_tlb_mm(vma->vm_mm); 140} 141 142void native_flush_tlb_others(const cpumask_t *cpumask, struct mm_struct *mm, 143 unsigned long va); 144 145#define TLBSTATE_OK 1 146#define TLBSTATE_LAZY 2 147 148struct tlb_state 149{ 150 struct mm_struct *active_mm; 151 int state; 152 char __cacheline_padding[L1_CACHE_BYTES-8]; 153}; 154DECLARE_PER_CPU(struct tlb_state, cpu_tlbstate); 155#endif /* SMP */ 156 157#ifndef CONFIG_PARAVIRT 158#define flush_tlb_others(mask, mm, va) \ 159 native_flush_tlb_others(&mask, mm, va) 160#endif 161 162static inline void flush_tlb_kernel_range(unsigned long start, 163 unsigned long end) 164{ 165 flush_tlb_all(); 166} 167 168#endif /* _I386_TLBFLUSH_H */ 169