1 #ifndef _PARISC_TLBFLUSH_H
2 #define _PARISC_TLBFLUSH_H
4 /* TLB flushing routines.... */
6 #include <linux/config.h>
8 #include <asm/mmu_context.h>
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
15 * it on all SMP systems not just the N class. */
17 extern spinlock_t pa_tlb_lock;
19 #define purge_tlb_start(x) spin_lock(&pa_tlb_lock)
20 #define purge_tlb_end(x) spin_unlock(&pa_tlb_lock)
24 #define purge_tlb_start(x) do { } while(0)
25 #define purge_tlb_end(x) do { } while (0)
30 extern void flush_tlb_all(void);
35 * XXX This code is NOT valid for HP-UX compatibility processes,
36 * (although it will probably work 99% of the time). HP-UX
37 * processes are free to play with the space id's and save them
38 * over long periods of time, etc. so we have to preserve the
39 * space and just flush the entire tlb. We need to check the
40 * personality in order to do that, but the personality is not
41 * currently being set correctly.
43 * Of course, Linux processes could do the same thing, but
44 * we don't support that (and the compilers, dynamic linker,
45 * etc. do not do that).
48 static inline void flush_tlb_mm(struct mm_struct *mm)
50 BUG_ON(mm == &init_mm); /* Should never happen */
57 free_sid(mm->context);
58 mm->context = alloc_sid();
59 if (mm == current->active_mm)
60 load_context(mm->context);
65 extern __inline__ void flush_tlb_pgtables(struct mm_struct *mm, unsigned long start, unsigned long end)
69 static inline void flush_tlb_page(struct vm_area_struct *vma,
72 /* For one page, it's not worth testing the split_tlb variable */
75 mtsp(vma->vm_mm->context,1);
82 static inline void flush_tlb_range(struct vm_area_struct *vma,
83 unsigned long start, unsigned long end)
87 npages = ((end - (start & PAGE_MASK)) + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
88 if (npages >= 512) /* 2MB of space: arbitrary, should be tuned */
92 mtsp(vma->vm_mm->context,1);
111 #define flush_tlb_kernel_range(start, end) flush_tlb_all()