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[hh.org.git] / include / asm-alpha / tlbflush.h
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1 #ifndef _ALPHA_TLBFLUSH_H
2 #define _ALPHA_TLBFLUSH_H
4 #include <linux/mm.h>
5 #include <asm/compiler.h>
7 #ifndef __EXTERN_INLINE
8 #define __EXTERN_INLINE extern inline
9 #define __MMU_EXTERN_INLINE
10 #endif
12 extern void __load_new_mm_context(struct mm_struct *);
15 /* Use a few helper functions to hide the ugly broken ASN
16 numbers on early Alphas (ev4 and ev45). */
18 __EXTERN_INLINE void
19 ev4_flush_tlb_current(struct mm_struct *mm)
21 __load_new_mm_context(mm);
22 tbiap();
25 __EXTERN_INLINE void
26 ev5_flush_tlb_current(struct mm_struct *mm)
28 __load_new_mm_context(mm);
31 /* Flush just one page in the current TLB set. We need to be very
32 careful about the icache here, there is no way to invalidate a
33 specific icache page. */
35 __EXTERN_INLINE void
36 ev4_flush_tlb_current_page(struct mm_struct * mm,
37 struct vm_area_struct *vma,
38 unsigned long addr)
40 int tbi_flag = 2;
41 if (vma->vm_flags & VM_EXEC) {
42 __load_new_mm_context(mm);
43 tbi_flag = 3;
45 tbi(tbi_flag, addr);
48 __EXTERN_INLINE void
49 ev5_flush_tlb_current_page(struct mm_struct * mm,
50 struct vm_area_struct *vma,
51 unsigned long addr)
53 if (vma->vm_flags & VM_EXEC)
54 __load_new_mm_context(mm);
55 else
56 tbi(2, addr);
60 #ifdef CONFIG_ALPHA_GENERIC
61 # define flush_tlb_current alpha_mv.mv_flush_tlb_current
62 # define flush_tlb_current_page alpha_mv.mv_flush_tlb_current_page
63 #else
64 # ifdef CONFIG_ALPHA_EV4
65 # define flush_tlb_current ev4_flush_tlb_current
66 # define flush_tlb_current_page ev4_flush_tlb_current_page
67 # else
68 # define flush_tlb_current ev5_flush_tlb_current
69 # define flush_tlb_current_page ev5_flush_tlb_current_page
70 # endif
71 #endif
73 #ifdef __MMU_EXTERN_INLINE
74 #undef __EXTERN_INLINE
75 #undef __MMU_EXTERN_INLINE
76 #endif
78 /* Flush current user mapping. */
79 static inline void
80 flush_tlb(void)
82 flush_tlb_current(current->active_mm);
85 /* Flush someone else's user mapping. */
86 static inline void
87 flush_tlb_other(struct mm_struct *mm)
89 unsigned long *mmc = &mm->context[smp_processor_id()];
90 /* Check it's not zero first to avoid cacheline ping pong
91 when possible. */
92 if (*mmc) *mmc = 0;
95 /* Flush a specified range of user mapping page tables from TLB.
96 Although Alpha uses VPTE caches, this can be a nop, as Alpha does
97 not have finegrained tlb flushing, so it will flush VPTE stuff
98 during next flush_tlb_range. */
100 static inline void
101 flush_tlb_pgtables(struct mm_struct *mm, unsigned long start,
102 unsigned long end)
106 #ifndef CONFIG_SMP
107 /* Flush everything (kernel mapping may also have changed
108 due to vmalloc/vfree). */
109 static inline void flush_tlb_all(void)
111 tbia();
114 /* Flush a specified user mapping. */
115 static inline void
116 flush_tlb_mm(struct mm_struct *mm)
118 if (mm == current->active_mm)
119 flush_tlb_current(mm);
120 else
121 flush_tlb_other(mm);
124 /* Page-granular tlb flush. */
125 static inline void
126 flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
128 struct mm_struct *mm = vma->vm_mm;
130 if (mm == current->active_mm)
131 flush_tlb_current_page(mm, vma, addr);
132 else
133 flush_tlb_other(mm);
136 /* Flush a specified range of user mapping. On the Alpha we flush
137 the whole user tlb. */
138 static inline void
139 flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
140 unsigned long end)
142 flush_tlb_mm(vma->vm_mm);
145 #else /* CONFIG_SMP */
147 extern void flush_tlb_all(void);
148 extern void flush_tlb_mm(struct mm_struct *);
149 extern void flush_tlb_page(struct vm_area_struct *, unsigned long);
150 extern void flush_tlb_range(struct vm_area_struct *, unsigned long,
151 unsigned long);
153 #endif /* CONFIG_SMP */
155 #define flush_tlb_kernel_range(start, end) flush_tlb_all()
157 #endif /* _ALPHA_TLBFLUSH_H */