From deae26bf6a10e47983606f5df080b91e97650ead Mon Sep 17 00:00:00 2001 From: Kyle McMartin Date: Mon, 28 Jul 2008 23:02:13 -0400 Subject: parisc: move include/asm-parisc to arch/parisc/include/asm --- arch/parisc/include/asm/tlbflush.h | 80 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 arch/parisc/include/asm/tlbflush.h (limited to 'arch/parisc/include/asm/tlbflush.h') diff --git a/arch/parisc/include/asm/tlbflush.h b/arch/parisc/include/asm/tlbflush.h new file mode 100644 index 0000000..b72ec66 --- /dev/null +++ b/arch/parisc/include/asm/tlbflush.h @@ -0,0 +1,80 @@ +#ifndef _PARISC_TLBFLUSH_H +#define _PARISC_TLBFLUSH_H + +/* TLB flushing routines.... */ + +#include +#include +#include + + +/* 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 +} + +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(); +} + +void __flush_tlb_range(unsigned long sid, + unsigned long start, unsigned long end); + +#define flush_tlb_range(vma,start,end) __flush_tlb_range((vma)->vm_mm->context,start,end) + +#define flush_tlb_kernel_range(start, end) __flush_tlb_range(0,start,end) + +#endif -- cgit v1.1