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 #define smp_flush_tlb_all() flush_tlb_all() 26 27 /* 28 * flush_tlb_mm() 29 * 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. 37 * 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). 41 */ 42 43 static inline void flush_tlb_mm(struct mm_struct *mm) 44 { 45 BUG_ON(mm == &init_mm); /* Should never happen */ 46 47 #if 1 || defined(CONFIG_SMP) 48 flush_tlb_all(); 49 #else 50 /* FIXME: currently broken, causing space id and protection ids 51 * to go out of sync, resulting in faults on userspace accesses. 52 */ 53 if (mm) { 54 if (mm->context != 0) 55 free_sid(mm->context); 56 mm->context = alloc_sid(); 57 if (mm == current->active_mm) 58 load_context(mm->context); 59 } 60 #endif 61 } 62 63 static inline void flush_tlb_page(struct vm_area_struct *vma, 64 unsigned long addr) 65 { 66 unsigned long flags, sid; 67 68 /* For one page, it's not worth testing the split_tlb variable */ 69 70 mb(); 71 sid = vma->vm_mm->context; 72 purge_tlb_start(flags); 73 mtsp(sid, 1); 74 pdtlb(addr); 75 pitlb(addr); 76 purge_tlb_end(flags); 77 } 78 79 void __flush_tlb_range(unsigned long sid, 80 unsigned long start, unsigned long end); 81 82 #define flush_tlb_range(vma,start,end) __flush_tlb_range((vma)->vm_mm->context,start,end) 83 84 #define flush_tlb_kernel_range(start, end) __flush_tlb_range(0,start,end) 85 86 #endif 87