1 #ifndef _PARISC_TLBFLUSH_H
2 #define _PARISC_TLBFLUSH_H
4 /* TLB flushing routines.... */
7 #include <asm/mmu_context.h>
10 /* This is for the serialisation of PxTLB broadcasts. At least on the
11 * N class systems, only one PxTLB inter processor broadcast can be
12 * active at any one time on the Merced bus. This tlb purge
13 * synchronisation is fairly lightweight and harmless so we activate
14 * it on all SMP systems not just the N class. We also need to have
15 * preemption disabled on uniprocessor machines, and spin_lock does that
18 extern spinlock_t pa_tlb_lock;
20 #define purge_tlb_start(x) spin_lock(&pa_tlb_lock)
21 #define purge_tlb_end(x) spin_unlock(&pa_tlb_lock)
23 extern void flush_tlb_all(void);
24 extern void flush_tlb_all_local(void *);
29 * XXX This code is NOT valid for HP-UX compatibility processes,
30 * (although it will probably work 99% of the time). HP-UX
31 * processes are free to play with the space id's and save them
32 * over long periods of time, etc. so we have to preserve the
33 * space and just flush the entire tlb. We need to check the
34 * personality in order to do that, but the personality is not
35 * currently being set correctly.
37 * Of course, Linux processes could do the same thing, but
38 * we don't support that (and the compilers, dynamic linker,
39 * etc. do not do that).
42 static inline void flush_tlb_mm(struct mm_struct *mm)
44 BUG_ON(mm == &init_mm); /* Should never happen */
51 free_sid(mm->context);
52 mm->context = alloc_sid();
53 if (mm == current->active_mm)
54 load_context(mm->context);
59 extern __inline__ void flush_tlb_pgtables(struct mm_struct *mm, unsigned long start, unsigned long end)
63 static inline void flush_tlb_page(struct vm_area_struct *vma,
66 /* For one page, it's not worth testing the split_tlb variable */
69 mtsp(vma->vm_mm->context,1);
76 static inline void flush_tlb_range(struct vm_area_struct *vma,
77 unsigned long start, unsigned long end)
81 npages = ((end - (start & PAGE_MASK)) + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
82 if (npages >= 512) /* 2MB of space: arbitrary, should be tuned */
85 mtsp(vma->vm_mm->context,1);
103 #define flush_tlb_kernel_range(start, end) flush_tlb_all()