1 #ifndef _PARISC_TLBFLUSH_H 2 #define _PARISC_TLBFLUSH_H 3 4 /* TLB flushing routines.... */ 5 6 #include <linux/mm.h> 7 #include <linux/sched.h> 8 #include <asm/mmu_context.h> 9 10 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 systems not just the N class. 16 */ 17 extern spinlock_t pa_tlb_lock; 18 19 #define purge_tlb_start(flags) spin_lock_irqsave(&pa_tlb_lock, flags) 20 #define purge_tlb_end(flags) spin_unlock_irqrestore(&pa_tlb_lock, flags) 21 22 extern void flush_tlb_all(void); 23 extern void flush_tlb_all_local(void *); 24 25 /* 26 * flush_tlb_mm() 27 * 28 * XXX This code is NOT valid for HP-UX compatibility processes, 29 * (although it will probably work 99% of the time). HP-UX 30 * processes are free to play with the space id's and save them 31 * over long periods of time, etc. so we have to preserve the 32 * space and just flush the entire tlb. We need to check the 33 * personality in order to do that, but the personality is not 34 * currently being set correctly. 35 * 36 * Of course, Linux processes could do the same thing, but 37 * we don't support that (and the compilers, dynamic linker, 38 * etc. do not do that). 39 */ 40 41 static inline void flush_tlb_mm(struct mm_struct *mm) 42 { 43 BUG_ON(mm == &init_mm); /* Should never happen */ 44 45 #if 1 || defined(CONFIG_SMP) 46 flush_tlb_all(); 47 #else 48 /* FIXME: currently broken, causing space id and protection ids 49 * to go out of sync, resulting in faults on userspace accesses. 50 */ 51 if (mm) { 52 if (mm->context != 0) 53 free_sid(mm->context); 54 mm->context = alloc_sid(); 55 if (mm == current->active_mm) 56 load_context(mm->context); 57 } 58 #endif 59 } 60 61 static inline void flush_tlb_page(struct vm_area_struct *vma, 62 unsigned long addr) 63 { 64 unsigned long flags; 65 66 /* For one page, it's not worth testing the split_tlb variable */ 67 68 mb(); 69 mtsp(vma->vm_mm->context,1); 70 purge_tlb_start(flags); 71 pdtlb(addr); 72 pitlb(addr); 73 purge_tlb_end(flags); 74 } 75 76 void __flush_tlb_range(unsigned long sid, 77 unsigned long start, unsigned long end); 78 79 #define flush_tlb_range(vma,start,end) __flush_tlb_range((vma)->vm_mm->context,start,end) 80 81 #define flush_tlb_kernel_range(start, end) __flush_tlb_range(0,start,end) 82 83 #endif 84