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1da177e4 LT |
1 | #ifndef _ASM_IA64_TLBFLUSH_H |
2 | #define _ASM_IA64_TLBFLUSH_H | |
3 | ||
4 | /* | |
5 | * Copyright (C) 2002 Hewlett-Packard Co | |
6 | * David Mosberger-Tang <davidm@hpl.hp.com> | |
7 | */ | |
8 | ||
1da177e4 LT |
9 | |
10 | #include <linux/mm.h> | |
11 | ||
12 | #include <asm/intrinsics.h> | |
13 | #include <asm/mmu_context.h> | |
14 | #include <asm/page.h> | |
15 | ||
16 | /* | |
17 | * Now for some TLB flushing routines. This is the kind of stuff that | |
18 | * can be very expensive, so try to avoid them whenever possible. | |
19 | */ | |
20 | ||
21 | /* | |
22 | * Flush everything (kernel mapping may also have changed due to | |
23 | * vmalloc/vfree). | |
24 | */ | |
25 | extern void local_flush_tlb_all (void); | |
26 | ||
27 | #ifdef CONFIG_SMP | |
28 | extern void smp_flush_tlb_all (void); | |
29 | extern void smp_flush_tlb_mm (struct mm_struct *mm); | |
3be44b9c | 30 | extern void smp_flush_tlb_cpumask (cpumask_t xcpumask); |
1da177e4 LT |
31 | # define flush_tlb_all() smp_flush_tlb_all() |
32 | #else | |
33 | # define flush_tlb_all() local_flush_tlb_all() | |
3be44b9c | 34 | # define smp_flush_tlb_cpumask(m) local_flush_tlb_all() |
1da177e4 LT |
35 | #endif |
36 | ||
37 | static inline void | |
38 | local_finish_flush_tlb_mm (struct mm_struct *mm) | |
39 | { | |
40 | if (mm == current->active_mm) | |
41 | activate_context(mm); | |
42 | } | |
43 | ||
44 | /* | |
45 | * Flush a specified user mapping. This is called, e.g., as a result of fork() and | |
46 | * exit(). fork() ends up here because the copy-on-write mechanism needs to write-protect | |
47 | * the PTEs of the parent task. | |
48 | */ | |
49 | static inline void | |
50 | flush_tlb_mm (struct mm_struct *mm) | |
51 | { | |
52 | if (!mm) | |
53 | return; | |
54 | ||
dcc17d1b | 55 | set_bit(mm->context, ia64_ctx.flushmap); |
1da177e4 LT |
56 | mm->context = 0; |
57 | ||
58 | if (atomic_read(&mm->mm_users) == 0) | |
59 | return; /* happens as a result of exit_mmap() */ | |
60 | ||
61 | #ifdef CONFIG_SMP | |
62 | smp_flush_tlb_mm(mm); | |
63 | #else | |
64 | local_finish_flush_tlb_mm(mm); | |
65 | #endif | |
66 | } | |
67 | ||
68 | extern void flush_tlb_range (struct vm_area_struct *vma, unsigned long start, unsigned long end); | |
69 | ||
70 | /* | |
71 | * Page-granular tlb flush. | |
72 | */ | |
73 | static inline void | |
74 | flush_tlb_page (struct vm_area_struct *vma, unsigned long addr) | |
75 | { | |
76 | #ifdef CONFIG_SMP | |
77 | flush_tlb_range(vma, (addr & PAGE_MASK), (addr & PAGE_MASK) + PAGE_SIZE); | |
78 | #else | |
79 | if (vma->vm_mm == current->active_mm) | |
80 | ia64_ptcl(addr, (PAGE_SHIFT << 2)); | |
81 | else | |
82 | vma->vm_mm->context = 0; | |
83 | #endif | |
84 | } | |
85 | ||
3be44b9c JS |
86 | /* |
87 | * Flush the local TLB. Invoked from another cpu using an IPI. | |
88 | */ | |
89 | #ifdef CONFIG_SMP | |
90 | void smp_local_flush_tlb(void); | |
91 | #else | |
92 | #define smp_local_flush_tlb() | |
93 | #endif | |
94 | ||
285fbd66 JB |
95 | static inline void flush_tlb_kernel_range(unsigned long start, |
96 | unsigned long end) | |
97 | { | |
98 | flush_tlb_all(); /* XXX fix me */ | |
99 | } | |
1da177e4 LT |
100 | |
101 | #endif /* _ASM_IA64_TLBFLUSH_H */ |