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 98 static inline void flush_tlb_mm(struct mm_struct *mm) 99 { 100 if (mm == current->active_mm) 101 __flush_tlb(); 102 } 103 104 static 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 } 110 111 static 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 } 117 118 static 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() 129 130 extern void flush_tlb_all(void); 131 extern void flush_tlb_current_task(void); 132 extern void flush_tlb_mm(struct mm_struct *); 133 extern void flush_tlb_page(struct vm_area_struct *, unsigned long); 134 135 #define flush_tlb() flush_tlb_current_task() 136 137 static 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 } 141 142 void 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 2 147 148 struct tlb_state 149 { 150 struct mm_struct *active_mm; 151 int state; 152 char __cacheline_padding[L1_CACHE_BYTES-8]; 153 }; 154 DECLARE_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 161 162 static 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
