#ifndef _PARISC_TLBFLUSH_H #define _PARISC_TLBFLUSH_H /* TLB flushing routines.... */ #include <linux/mm.h> #include <asm/mmu_context.h> /* This is for the serialisation of PxTLB broadcasts. At least on the * N class systems, only one PxTLB inter processor broadcast can be * active at any one time on the Merced bus. This tlb purge * synchronisation is fairly lightweight and harmless so we activate * it on all SMP systems not just the N class. We also need to have * preemption disabled on uniprocessor machines, and spin_lock does that * nicely. */ extern spinlock_t pa_tlb_lock; #define purge_tlb_start(x) spin_lock(&pa_tlb_lock) #define purge_tlb_end(x) spin_unlock(&pa_tlb_lock) extern void flush_tlb_all(void); extern void flush_tlb_all_local(void *); /* * flush_tlb_mm() * * XXX This code is NOT valid for HP-UX compatibility processes, * (although it will probably work 99% of the time). HP-UX * processes are free to play with the space id's and save them * over long periods of time, etc. so we have to preserve the * space and just flush the entire tlb. We need to check the * personality in order to do that, but the personality is not * currently being set correctly. * * Of course, Linux processes could do the same thing, but * we don't support that (and the compilers, dynamic linker, * etc. do not do that). */ static inline void flush_tlb_mm(struct mm_struct *mm) { BUG_ON(mm == &init_mm); /* Should never happen */ #ifdef CONFIG_SMP flush_tlb_all(); #else if (mm) { if (mm->context != 0) free_sid(mm->context); mm->context = alloc_sid(); if (mm == current->active_mm) load_context(mm->context); } #endif } extern __inline__ void flush_tlb_pgtables(struct mm_struct *mm, unsigned long start, unsigned long end) { } static inline void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr) { /* For one page, it's not worth testing the split_tlb variable */ mb(); mtsp(vma->vm_mm->context,1); purge_tlb_start(); pdtlb(addr); pitlb(addr); purge_tlb_end(); } static inline void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end) { unsigned long npages; npages = ((end - (start & PAGE_MASK)) + (PAGE_SIZE - 1)) >> PAGE_SHIFT; if (npages >= 512) /* 2MB of space: arbitrary, should be tuned */ flush_tlb_all(); else { mtsp(vma->vm_mm->context,1); purge_tlb_start(); if (split_tlb) { while (npages--) { pdtlb(start); pitlb(start); start += PAGE_SIZE; } } else { while (npages--) { pdtlb(start); start += PAGE_SIZE; } } purge_tlb_end(); } } #define flush_tlb_kernel_range(start, end) flush_tlb_all() #endif