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Linux kernel mirror (for testing)
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linux
1#ifndef _ALPHA_TLBFLUSH_H
2#define _ALPHA_TLBFLUSH_H
3
4#include <linux/mm.h>
5#include <asm/compiler.h>
6#include <asm/pgalloc.h>
7
8#ifndef __EXTERN_INLINE
9#define __EXTERN_INLINE extern inline
10#define __MMU_EXTERN_INLINE
11#endif
12
13extern void __load_new_mm_context(struct mm_struct *);
14
15
16/* Use a few helper functions to hide the ugly broken ASN
17 numbers on early Alphas (ev4 and ev45). */
18
19__EXTERN_INLINE void
20ev4_flush_tlb_current(struct mm_struct *mm)
21{
22 __load_new_mm_context(mm);
23 tbiap();
24}
25
26__EXTERN_INLINE void
27ev5_flush_tlb_current(struct mm_struct *mm)
28{
29 __load_new_mm_context(mm);
30}
31
32/* Flush just one page in the current TLB set. We need to be very
33 careful about the icache here, there is no way to invalidate a
34 specific icache page. */
35
36__EXTERN_INLINE void
37ev4_flush_tlb_current_page(struct mm_struct * mm,
38 struct vm_area_struct *vma,
39 unsigned long addr)
40{
41 int tbi_flag = 2;
42 if (vma->vm_flags & VM_EXEC) {
43 __load_new_mm_context(mm);
44 tbi_flag = 3;
45 }
46 tbi(tbi_flag, addr);
47}
48
49__EXTERN_INLINE void
50ev5_flush_tlb_current_page(struct mm_struct * mm,
51 struct vm_area_struct *vma,
52 unsigned long addr)
53{
54 if (vma->vm_flags & VM_EXEC)
55 __load_new_mm_context(mm);
56 else
57 tbi(2, addr);
58}
59
60
61#ifdef CONFIG_ALPHA_GENERIC
62# define flush_tlb_current alpha_mv.mv_flush_tlb_current
63# define flush_tlb_current_page alpha_mv.mv_flush_tlb_current_page
64#else
65# ifdef CONFIG_ALPHA_EV4
66# define flush_tlb_current ev4_flush_tlb_current
67# define flush_tlb_current_page ev4_flush_tlb_current_page
68# else
69# define flush_tlb_current ev5_flush_tlb_current
70# define flush_tlb_current_page ev5_flush_tlb_current_page
71# endif
72#endif
73
74#ifdef __MMU_EXTERN_INLINE
75#undef __EXTERN_INLINE
76#undef __MMU_EXTERN_INLINE
77#endif
78
79/* Flush current user mapping. */
80static inline void
81flush_tlb(void)
82{
83 flush_tlb_current(current->active_mm);
84}
85
86/* Flush someone else's user mapping. */
87static inline void
88flush_tlb_other(struct mm_struct *mm)
89{
90 unsigned long *mmc = &mm->context[smp_processor_id()];
91 /* Check it's not zero first to avoid cacheline ping pong
92 when possible. */
93 if (*mmc) *mmc = 0;
94}
95
96#ifndef CONFIG_SMP
97/* Flush everything (kernel mapping may also have changed
98 due to vmalloc/vfree). */
99static inline void flush_tlb_all(void)
100{
101 tbia();
102}
103
104/* Flush a specified user mapping. */
105static inline void
106flush_tlb_mm(struct mm_struct *mm)
107{
108 if (mm == current->active_mm)
109 flush_tlb_current(mm);
110 else
111 flush_tlb_other(mm);
112}
113
114/* Page-granular tlb flush. */
115static inline void
116flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
117{
118 struct mm_struct *mm = vma->vm_mm;
119
120 if (mm == current->active_mm)
121 flush_tlb_current_page(mm, vma, addr);
122 else
123 flush_tlb_other(mm);
124}
125
126/* Flush a specified range of user mapping. On the Alpha we flush
127 the whole user tlb. */
128static inline void
129flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
130 unsigned long end)
131{
132 flush_tlb_mm(vma->vm_mm);
133}
134
135#else /* CONFIG_SMP */
136
137extern void flush_tlb_all(void);
138extern void flush_tlb_mm(struct mm_struct *);
139extern void flush_tlb_page(struct vm_area_struct *, unsigned long);
140extern void flush_tlb_range(struct vm_area_struct *, unsigned long,
141 unsigned long);
142
143#endif /* CONFIG_SMP */
144
145static inline void flush_tlb_kernel_range(unsigned long start,
146 unsigned long end)
147{
148 flush_tlb_all();
149}
150
151#endif /* _ALPHA_TLBFLUSH_H */