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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
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 */
25extern 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);
30# define flush_tlb_all() smp_flush_tlb_all()
31#else
32# define flush_tlb_all() local_flush_tlb_all()
33#endif
34
35static inline void
36local_finish_flush_tlb_mm (struct mm_struct *mm)
37{
38 if (mm == current->active_mm)
39 activate_context(mm);
40}
41
42/*
43 * Flush a specified user mapping. This is called, e.g., as a result of fork() and
44 * exit(). fork() ends up here because the copy-on-write mechanism needs to write-protect
45 * the PTEs of the parent task.
46 */
47static inline void
48flush_tlb_mm (struct mm_struct *mm)
49{
50 if (!mm)
51 return;
52
53 set_bit(mm->context, ia64_ctx.flushmap);
54 mm->context = 0;
55
56 if (atomic_read(&mm->mm_users) == 0)
57 return; /* happens as a result of exit_mmap() */
58
59#ifdef CONFIG_SMP
60 smp_flush_tlb_mm(mm);
61#else
62 local_finish_flush_tlb_mm(mm);
63#endif
64}
65
66extern void flush_tlb_range (struct vm_area_struct *vma, unsigned long start, unsigned long end);
67
68/*
69 * Page-granular tlb flush.
70 */
71static inline void
72flush_tlb_page (struct vm_area_struct *vma, unsigned long addr)
73{
74#ifdef CONFIG_SMP
75 flush_tlb_range(vma, (addr & PAGE_MASK), (addr & PAGE_MASK) + PAGE_SIZE);
76#else
77 if (vma->vm_mm == current->active_mm)
78 ia64_ptcl(addr, (PAGE_SHIFT << 2));
79 else
80 vma->vm_mm->context = 0;
81#endif
82}
83
84/*
85 * Flush the TLB entries mapping the virtually mapped linear page
86 * table corresponding to address range [START-END).
87 */
88static inline void
89flush_tlb_pgtables (struct mm_struct *mm, unsigned long start, unsigned long end)
90{
91 /*
92 * Deprecated. The virtual page table is now flushed via the normal gather/flush
93 * interface (see tlb.h).
94 */
95}
96
97#define flush_tlb_kernel_range(start, end) flush_tlb_all() /* XXX fix me */
98
99#endif /* _ASM_IA64_TLBFLUSH_H */