aboutsummaryrefslogtreecommitdiffstats
path: root/include/asm-parisc/tlbflush.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-parisc/tlbflush.h')
-rw-r--r--include/asm-parisc/tlbflush.h95
1 files changed, 95 insertions, 0 deletions
diff --git a/include/asm-parisc/tlbflush.h b/include/asm-parisc/tlbflush.h
new file mode 100644
index 000000000000..eb27b78930e8
--- /dev/null
+++ b/include/asm-parisc/tlbflush.h
@@ -0,0 +1,95 @@
1#ifndef _PARISC_TLBFLUSH_H
2#define _PARISC_TLBFLUSH_H
3
4/* TLB flushing routines.... */
5
6#include <linux/config.h>
7#include <linux/mm.h>
8#include <asm/mmu_context.h>
9
10extern void flush_tlb_all(void);
11
12/*
13 * flush_tlb_mm()
14 *
15 * XXX This code is NOT valid for HP-UX compatibility processes,
16 * (although it will probably work 99% of the time). HP-UX
17 * processes are free to play with the space id's and save them
18 * over long periods of time, etc. so we have to preserve the
19 * space and just flush the entire tlb. We need to check the
20 * personality in order to do that, but the personality is not
21 * currently being set correctly.
22 *
23 * Of course, Linux processes could do the same thing, but
24 * we don't support that (and the compilers, dynamic linker,
25 * etc. do not do that).
26 */
27
28static inline void flush_tlb_mm(struct mm_struct *mm)
29{
30 BUG_ON(mm == &init_mm); /* Should never happen */
31
32#ifdef CONFIG_SMP
33 flush_tlb_all();
34#else
35 if (mm) {
36 if (mm->context != 0)
37 free_sid(mm->context);
38 mm->context = alloc_sid();
39 if (mm == current->active_mm)
40 load_context(mm->context);
41 }
42#endif
43}
44
45extern __inline__ void flush_tlb_pgtables(struct mm_struct *mm, unsigned long start, unsigned long end)
46{
47}
48
49static inline void flush_tlb_page(struct vm_area_struct *vma,
50 unsigned long addr)
51{
52 /* For one page, it's not worth testing the split_tlb variable */
53
54 mb();
55 mtsp(vma->vm_mm->context,1);
56 purge_tlb_start();
57 pdtlb(addr);
58 pitlb(addr);
59 purge_tlb_end();
60}
61
62static inline void flush_tlb_range(struct vm_area_struct *vma,
63 unsigned long start, unsigned long end)
64{
65 unsigned long npages;
66
67
68 npages = ((end - (start & PAGE_MASK)) + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
69 if (npages >= 512) /* XXX arbitrary, should be tuned */
70 flush_tlb_all();
71 else {
72
73 mtsp(vma->vm_mm->context,1);
74 if (split_tlb) {
75 purge_tlb_start();
76 while (npages--) {
77 pdtlb(start);
78 pitlb(start);
79 start += PAGE_SIZE;
80 }
81 purge_tlb_end();
82 } else {
83 purge_tlb_start();
84 while (npages--) {
85 pdtlb(start);
86 start += PAGE_SIZE;
87 }
88 purge_tlb_end();
89 }
90 }
91}
92
93#define flush_tlb_kernel_range(start, end) flush_tlb_all()
94
95#endif