arch/arm/kernel/smp_tlb.c

   1 /*
   2  *  linux/arch/arm/kernel/smp_tlb.c
   3  *
   4  *  Copyright (C) 2002 ARM Limited, All Rights Reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10 #include <linux/preempt.h>
  11 #include <linux/smp.h>
  12
  13 #include <asm/smp_plat.h>
  14 #include <asm/tlbflush.h>
  15
  16 /**********************************************************************/
  17
  18 /*
  19  * TLB operations
  20  */
  21 struct tlb_args {
  22         struct vm_area_struct *ta_vma;
  23         unsigned long ta_start;
  24         unsigned long ta_end;
  25 };
  26
  27 static inline void ipi_flush_tlb_all(void *ignored)
  28 {
  29         local_flush_tlb_all();
  30 }
  31
  32 static inline void ipi_flush_tlb_mm(void *arg)
  33 {
  34         struct mm_struct *mm = (struct mm_struct *)arg;
  35
  36         local_flush_tlb_mm(mm);
  37 }
  38
  39 static inline void ipi_flush_tlb_page(void *arg)
  40 {
  41         struct tlb_args *ta = (struct tlb_args *)arg;
  42
  43         local_flush_tlb_page(ta->ta_vma, ta->ta_start);
  44 }
  45
  46 static inline void ipi_flush_tlb_kernel_page(void *arg)
  47 {
  48         struct tlb_args *ta = (struct tlb_args *)arg;
  49
  50         local_flush_tlb_kernel_page(ta->ta_start);
  51 }
  52
  53 static inline void ipi_flush_tlb_range(void *arg)
  54 {
  55         struct tlb_args *ta = (struct tlb_args *)arg;
  56
  57         local_flush_tlb_range(ta->ta_vma, ta->ta_start, ta->ta_end);
  58 }
  59
  60 static inline void ipi_flush_tlb_kernel_range(void *arg)
  61 {
  62         struct tlb_args *ta = (struct tlb_args *)arg;
  63
  64         local_flush_tlb_kernel_range(ta->ta_start, ta->ta_end);
  65 }
  66
  67 void flush_tlb_all(void)
  68 {
  69         if (tlb_ops_need_broadcast())
  70                 on_each_cpu(ipi_flush_tlb_all, NULL, 1);
  71         else
  72                 local_flush_tlb_all();
  73 }
  74
  75 void flush_tlb_mm(struct mm_struct *mm)
  76 {
  77         if (tlb_ops_need_broadcast())
  78                 on_each_cpu_mask(mm_cpumask(mm), ipi_flush_tlb_mm, mm, 1);
  79         else
  80                 local_flush_tlb_mm(mm);
  81 }
  82
  83 void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr)
  84 {
  85         if (tlb_ops_need_broadcast()) {
  86                 struct tlb_args ta;
  87                 ta.ta_vma = vma;
  88                 ta.ta_start = uaddr;
  89                 on_each_cpu_mask(mm_cpumask(vma->vm_mm), ipi_flush_tlb_page,
  90                                         &ta, 1);
  91         } else
  92                 local_flush_tlb_page(vma, uaddr);
  93 }
  94
  95 void flush_tlb_kernel_page(unsigned long kaddr)
  96 {
  97         if (tlb_ops_need_broadcast()) {
  98                 struct tlb_args ta;
  99                 ta.ta_start = kaddr;
 100                 on_each_cpu(ipi_flush_tlb_kernel_page, &ta, 1);
 101         } else
 102                 local_flush_tlb_kernel_page(kaddr);
 103 }
 104
 105 void flush_tlb_range(struct vm_area_struct *vma,
 106                      unsigned long start, unsigned long end)
 107 {
 108         if (tlb_ops_need_broadcast()) {
 109                 struct tlb_args ta;
 110                 ta.ta_vma = vma;
 111                 ta.ta_start = start;
 112                 ta.ta_end = end;
 113                 on_each_cpu_mask(mm_cpumask(vma->vm_mm), ipi_flush_tlb_range,
 114                                         &ta, 1);
 115         } else
 116                 local_flush_tlb_range(vma, start, end);
 117 }
 118
 119 void flush_tlb_kernel_range(unsigned long start, unsigned long end)
 120 {
 121         if (tlb_ops_need_broadcast()) {
 122                 struct tlb_args ta;
 123                 ta.ta_start = start;
 124                 ta.ta_end = end;
 125                 on_each_cpu(ipi_flush_tlb_kernel_range, &ta, 1);
 126         } else
 127                 local_flush_tlb_kernel_range(start, end);
 128 }
 129