1 #ifndef _ASM_IA64_TLBFLUSH_H 2 #define _ASM_IA64_TLBFLUSH_H 3 4 /* 5 * Copyright (C) 2002 Hewlett-Packard Co 6 * David Mosberger-Tang <davidm@hpl.hp.com> 7 */ 8 9 10 #include <linux/mm.h> 11 12 #include <asm/intrinsics.h> 13 #include <asm/mmu_context.h> 14 #include <asm/page.h> 15 16 /* 17 * Now for some TLB flushing routines. This is the kind of stuff that 18 * can be very expensive, so try to avoid them whenever possible. 19 */ 20 extern void setup_ptcg_sem(int max_purges, int from_palo); 21 22 /* 23 * Flush everything (kernel mapping may also have changed due to 24 * vmalloc/vfree). 25 */ 26 extern void local_flush_tlb_all (void); 27 28 #ifdef CONFIG_SMP 29 extern void smp_flush_tlb_all (void); 30 extern void smp_flush_tlb_mm (struct mm_struct *mm); 31 extern void smp_flush_tlb_cpumask (cpumask_t xcpumask); 32 # define flush_tlb_all() smp_flush_tlb_all() 33 #else 34 # define flush_tlb_all() local_flush_tlb_all() 35 # define smp_flush_tlb_cpumask(m) local_flush_tlb_all() 36 #endif 37 38 static inline void 39 local_finish_flush_tlb_mm (struct mm_struct *mm) 40 { 41 if (mm == current->active_mm) 42 activate_context(mm); 43 } 44 45 /* 46 * Flush a specified user mapping. This is called, e.g., as a result of fork() and 47 * exit(). fork() ends up here because the copy-on-write mechanism needs to write-protect 48 * the PTEs of the parent task. 49 */ 50 static inline void 51 flush_tlb_mm (struct mm_struct *mm) 52 { 53 if (!mm) 54 return; 55 56 set_bit(mm->context, ia64_ctx.flushmap); 57 mm->context = 0; 58 59 if (atomic_read(&mm->mm_users) == 0) 60 return; /* happens as a result of exit_mmap() */ 61 62 #ifdef CONFIG_SMP 63 smp_flush_tlb_mm(mm); 64 #else 65 local_finish_flush_tlb_mm(mm); 66 #endif 67 } 68 69 extern void flush_tlb_range (struct vm_area_struct *vma, unsigned long start, unsigned long end); 70 71 /* 72 * Page-granular tlb flush. 73 */ 74 static inline void 75 flush_tlb_page (struct vm_area_struct *vma, unsigned long addr) 76 { 77 #ifdef CONFIG_SMP 78 flush_tlb_range(vma, (addr & PAGE_MASK), (addr & PAGE_MASK) + PAGE_SIZE); 79 #else 80 if (vma->vm_mm == current->active_mm) 81 ia64_ptcl(addr, (PAGE_SHIFT << 2)); 82 else 83 vma->vm_mm->context = 0; 84 #endif 85 } 86 87 /* 88 * Flush the local TLB. Invoked from another cpu using an IPI. 89 */ 90 #ifdef CONFIG_SMP 91 void smp_local_flush_tlb(void); 92 #else 93 #define smp_local_flush_tlb() 94 #endif 95 96 static inline void flush_tlb_kernel_range(unsigned long start, 97 unsigned long end) 98 { 99 flush_tlb_all(); /* XXX fix me */ 100 } 101 102 #endif /* _ASM_IA64_TLBFLUSH_H */ 103