projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
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 | ||
| dcc17d1b | 54 | set_bit(mm->context, ia64_ctx.flushmap); |
| 1da177e4 LT |
55 | mm->context = 0; |
| 56 | ||
| 57 | if (atomic_read(&mm->mm_users) == 0) | |
| 58 | return; /* happens as a result of exit_mmap() */ | |
| 59 | ||
| 60 | #ifdef CONFIG_SMP | |
| 61 | smp_flush_tlb_mm(mm); | |
| 62 | #else | |
| 63 | local_finish_flush_tlb_mm(mm); | |
| 64 | #endif | |
| 65 | } | |
| 66 | ||
| 67 | extern void flush_tlb_range (struct vm_area_struct *vma, unsigned long start, unsigned long end); | |
| 68 | ||
| 69 | /* | |
| 70 | * Page-granular tlb flush. | |
| 71 | */ | |
| 72 | static inline void | |
| 73 | flush_tlb_page (struct vm_area_struct *vma, unsigned long addr) | |
| 74 | { | |
| 75 | #ifdef CONFIG_SMP | |
| 76 | flush_tlb_range(vma, (addr & PAGE_MASK), (addr & PAGE_MASK) + PAGE_SIZE); | |
| 77 | #else | |
| 78 | if (vma->vm_mm == current->active_mm) | |
| 79 | ia64_ptcl(addr, (PAGE_SHIFT << 2)); | |
| 80 | else | |
| 81 | vma->vm_mm->context = 0; | |
| 82 | #endif | |
| 83 | } | |
| 84 | ||
| 85 | /* | |
| 86 | * Flush the TLB entries mapping the virtually mapped linear page | |
| 87 | * table corresponding to address range [START-END). | |
| 88 | */ | |
| 89 | static inline void | |
| 90 | flush_tlb_pgtables (struct mm_struct *mm, unsigned long start, unsigned long end) | |
| 91 | { | |
| 92 | /* | |
| 93 | * Deprecated. The virtual page table is now flushed via the normal gather/flush | |
| 94 | * interface (see tlb.h). | |
| 95 | */ | |
| 96 | } | |
| 97 | ||
| 98 | #define flush_tlb_kernel_range(start, end) flush_tlb_all() /* XXX fix me */ | |
| 99 | ||
| 100 | #endif /* _ASM_IA64_TLBFLUSH_H */ |