| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | #include <linux/config.h> |
| 10 | |
| 11 | #include <linux/mm.h> |
| 12 | |
| 13 | #include <asm/intrinsics.h> |
| 14 | #include <asm/mmu_context.h> |
| 15 | #include <asm/page.h> |
| 16 | |
| 17 | /* |
| 18 | * Now for some TLB flushing routines. This is the kind of stuff that |
| 19 | * can be very expensive, so try to avoid them whenever possible. |
| 20 | */ |
| 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 | # define flush_tlb_all() smp_flush_tlb_all() |
| 32 | #else |
| 33 | # define flush_tlb_all() local_flush_tlb_all() |
| 34 | #endif |
| 35 | |
| 36 | static inline void |
| 37 | local_finish_flush_tlb_mm (struct mm_struct *mm) |
| 38 | { |
| 39 | if (mm == current->active_mm) |
| 40 | activate_context(mm); |
| 41 | } |
| 42 | |
| 43 | /* |
| 44 | * Flush a specified user mapping. This is called, e.g., as a result of fork() and |
| 45 | * exit(). fork() ends up here because the copy-on-write mechanism needs to write-protect |
| 46 | * the PTEs of the parent task. |
| 47 | */ |
| 48 | static inline void |
| 49 | flush_tlb_mm (struct mm_struct *mm) |
| 50 | { |
| 51 | if (!mm) |
| 52 | return; |
| 53 | |
| 54 | mm->context = 0; |
| 55 | |
| 56 | if (atomic_read(&mm->mm_users) == 0) |
| 57 | return; /* happens as a result of exit_mmap() */ |
| 58 | |
| 59 | #ifdef CONFIG_SMP |
| 60 | smp_flush_tlb_mm(mm); |
| 61 | #else |
| 62 | local_finish_flush_tlb_mm(mm); |
| 63 | #endif |
| 64 | } |
| 65 | |
| 66 | extern void flush_tlb_range (struct vm_area_struct *vma, unsigned long start, unsigned long end); |
| 67 | |
| 68 | /* |
| 69 | * Page-granular tlb flush. |
| 70 | */ |
| 71 | static inline void |
| 72 | flush_tlb_page (struct vm_area_struct *vma, unsigned long addr) |
| 73 | { |
| 74 | #ifdef CONFIG_SMP |
| 75 | flush_tlb_range(vma, (addr & PAGE_MASK), (addr & PAGE_MASK) + PAGE_SIZE); |
| 76 | #else |
| 77 | if (vma->vm_mm == current->active_mm) |
| 78 | ia64_ptcl(addr, (PAGE_SHIFT << 2)); |
| 79 | else |
| 80 | vma->vm_mm->context = 0; |
| 81 | #endif |
| 82 | } |
| 83 | |
| 84 | /* |
| 85 | * Flush the TLB entries mapping the virtually mapped linear page |
| 86 | * table corresponding to address range [START-END). |
| 87 | */ |
| 88 | static inline void |
| 89 | flush_tlb_pgtables (struct mm_struct *mm, unsigned long start, unsigned long end) |
| 90 | { |
| 91 | /* |
| 92 | * Deprecated. The virtual page table is now flushed via the normal gather/flush |
| 93 | * interface (see tlb.h). |
| 94 | */ |
| 95 | } |
| 96 | |
| 97 | #define flush_tlb_kernel_range(start, end) flush_tlb_all() /* XXX fix me */ |
| 98 | |
| 99 | #endif /* _ASM_IA64_TLBFLUSH_H */ |