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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#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
9#include <linux/config.h>
10
11#include <linux/mm.h>
12
13#include <asm/intrinsics.h>
14#include <asm/mmu_context.h>
15#include <asm/page.h>
16
17/*
18 * Now for some TLB flushing routines. This is the kind of stuff that
19 * can be very expensive, so try to avoid them whenever possible.
20 */
21
22/*
23 * Flush everything (kernel mapping may also have changed due to
24 * vmalloc/vfree).
25 */
26extern void local_flush_tlb_all (void);
27
28#ifdef CONFIG_SMP
29 extern void smp_flush_tlb_all (void);
30 extern void smp_flush_tlb_mm (struct mm_struct *mm);
31# define flush_tlb_all() smp_flush_tlb_all()
32#else
33# define flush_tlb_all() local_flush_tlb_all()
34#endif
35
36static inline void
37local_finish_flush_tlb_mm (struct mm_struct *mm)
38{
39 if (mm == current->active_mm)
40 activate_context(mm);
41}
42
43/*
44 * Flush a specified user mapping. This is called, e.g., as a result of fork() and
45 * exit(). fork() ends up here because the copy-on-write mechanism needs to write-protect
46 * the PTEs of the parent task.
47 */
48static inline void
49flush_tlb_mm (struct mm_struct *mm)
50{
51 if (!mm)
52 return;
53
Peter Keiltydcc17d12005-10-31 16:44:47 -050054 set_bit(mm->context, ia64_ctx.flushmap);
Linus Torvalds1da177e2005-04-16 15:20:36 -070055 mm->context = 0;
56
57 if (atomic_read(&mm->mm_users) == 0)
58 return; /* happens as a result of exit_mmap() */
59
60#ifdef CONFIG_SMP
61 smp_flush_tlb_mm(mm);
62#else
63 local_finish_flush_tlb_mm(mm);
64#endif
65}
66
67extern void flush_tlb_range (struct vm_area_struct *vma, unsigned long start, unsigned long end);
68
69/*
70 * Page-granular tlb flush.
71 */
72static inline void
73flush_tlb_page (struct vm_area_struct *vma, unsigned long addr)
74{
75#ifdef CONFIG_SMP
76 flush_tlb_range(vma, (addr & PAGE_MASK), (addr & PAGE_MASK) + PAGE_SIZE);
77#else
78 if (vma->vm_mm == current->active_mm)
79 ia64_ptcl(addr, (PAGE_SHIFT << 2));
80 else
81 vma->vm_mm->context = 0;
82#endif
83}
84
85/*
86 * Flush the TLB entries mapping the virtually mapped linear page
87 * table corresponding to address range [START-END).
88 */
89static inline void
90flush_tlb_pgtables (struct mm_struct *mm, unsigned long start, unsigned long end)
91{
92 /*
93 * Deprecated. The virtual page table is now flushed via the normal gather/flush
94 * interface (see tlb.h).
95 */
96}
97
98#define flush_tlb_kernel_range(start, end) flush_tlb_all() /* XXX fix me */
99
100#endif /* _ASM_IA64_TLBFLUSH_H */