1 #ifndef _PARISC_TLBFLUSH_H
2 #define _PARISC_TLBFLUSH_H
4 /* TLB flushing routines.... */
7 #include <linux/sched.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. We also need to have
16 * preemption disabled on uniprocessor machines, and spin_lock does that
19 extern spinlock_t pa_tlb_lock;
21 #define purge_tlb_start(x) spin_lock(&pa_tlb_lock)
22 #define purge_tlb_end(x) spin_unlock(&pa_tlb_lock)
24 extern void flush_tlb_all(void);
25 extern void flush_tlb_all_local(void *);
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.
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).
43 static inline void flush_tlb_mm(struct mm_struct *mm)
45 BUG_ON(mm == &init_mm); /* Should never happen */
47 #if 1 || defined(CONFIG_SMP)
50 /* FIXME: currently broken, causing space id and protection ids
51 * to go out of sync, resulting in faults on userspace accesses.
55 free_sid(mm->context);
56 mm->context = alloc_sid();
57 if (mm == current->active_mm)
58 load_context(mm->context);
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 void __flush_tlb_range(unsigned long sid,
77 unsigned long start, unsigned long end);
79 #define flush_tlb_range(vma,start,end) __flush_tlb_range((vma)->vm_mm->context,start,end)
81 #define flush_tlb_kernel_range(start, end) __flush_tlb_range(0,start,end)