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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _PARISC_TLBFLUSH_H
2#define _PARISC_TLBFLUSH_H
3
4/* TLB flushing routines.... */
5
Linus Torvalds1da177e2005-04-16 15:20:36 -07006#include <linux/mm.h>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +04007#include <linux/sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07008#include <asm/mmu_context.h>
9
Grant Grundler04d472d2005-10-21 22:40:24 -040010
11/* This is for the serialisation of PxTLB broadcasts. At least on the
12 * N class systems, only one PxTLB inter processor broadcast can be
13 * active at any one time on the Merced bus. This tlb purge
14 * synchronisation is fairly lightweight and harmless so we activate
Matthew Wilcox29a622d2005-11-17 16:44:14 -050015 * it on all SMP systems not just the N class. We also need to have
16 * preemption disabled on uniprocessor machines, and spin_lock does that
17 * nicely.
18 */
Grant Grundler04d472d2005-10-21 22:40:24 -040019extern spinlock_t pa_tlb_lock;
20
21#define purge_tlb_start(x) spin_lock(&pa_tlb_lock)
22#define purge_tlb_end(x) spin_unlock(&pa_tlb_lock)
23
Linus Torvalds1da177e2005-04-16 15:20:36 -070024extern void flush_tlb_all(void);
Matthew Wilcox1b2425e2006-01-10 20:47:49 -050025extern void flush_tlb_all_local(void *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070026
27/*
28 * flush_tlb_mm()
29 *
30 * XXX This code is NOT valid for HP-UX compatibility processes,
31 * (although it will probably work 99% of the time). HP-UX
32 * processes are free to play with the space id's and save them
33 * over long periods of time, etc. so we have to preserve the
34 * space and just flush the entire tlb. We need to check the
35 * personality in order to do that, but the personality is not
36 * currently being set correctly.
37 *
38 * Of course, Linux processes could do the same thing, but
39 * we don't support that (and the compilers, dynamic linker,
40 * etc. do not do that).
41 */
42
43static inline void flush_tlb_mm(struct mm_struct *mm)
44{
Kyle McMartin04532c42007-02-18 19:35:45 +000045 BUG_ON(mm == &init_mm); /* Should never happen */
46
47#ifdef CONFIG_SMP
48 flush_tlb_all();
49#else
50 if (mm) {
51 if (mm->context != 0)
52 free_sid(mm->context);
53 mm->context = alloc_sid();
54 if (mm == current->active_mm)
55 load_context(mm->context);
56 }
57#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070058}
59
Linus Torvalds1da177e2005-04-16 15:20:36 -070060static inline void flush_tlb_page(struct vm_area_struct *vma,
61 unsigned long addr)
62{
63 /* For one page, it's not worth testing the split_tlb variable */
64
65 mb();
66 mtsp(vma->vm_mm->context,1);
67 purge_tlb_start();
68 pdtlb(addr);
69 pitlb(addr);
70 purge_tlb_end();
71}
72
Randolph Chungd6ce8622006-12-12 05:51:54 -080073void __flush_tlb_range(unsigned long sid,
74 unsigned long start, unsigned long end);
Linus Torvalds1da177e2005-04-16 15:20:36 -070075
Randolph Chungd6ce8622006-12-12 05:51:54 -080076#define flush_tlb_range(vma,start,end) __flush_tlb_range((vma)->vm_mm->context,start,end)
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
Randolph Chungd6ce8622006-12-12 05:51:54 -080078#define flush_tlb_kernel_range(start, end) __flush_tlb_range(0,start,end)
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
80#endif