1 /* 1
2 * TLB flushing operations for SH with an MMU.
3 *
4 * Copyright (C) 1999 Niibe Yutaka
5 * Copyright (C) 2003 Paul Mundt
6 *
7 * This file is subject to the terms and condi
8 * License. See the file "COPYING" in the mai
9 * for more details.
10 */
11 #include <linux/mm.h>
12 #include <asm/mmu_context.h>
13 #include <asm/tlbflush.h>
14
15 void local_flush_tlb_page(struct vm_area_struc
16 {
17 unsigned int cpu = smp_processor_id();
18
19 if (vma->vm_mm && cpu_context(cpu, vma
20 unsigned long flags;
21 unsigned long asid;
22 unsigned long saved_asid = MMU
23
24 asid = cpu_asid(cpu, vma->vm_m
25 page &= PAGE_MASK;
26
27 local_irq_save(flags);
28 if (vma->vm_mm != current->mm)
29 saved_asid = get_asid(
30 set_asid(asid);
31 }
32 local_flush_tlb_one(asid, page
33 if (saved_asid != MMU_NO_ASID)
34 set_asid(saved_asid);
35 local_irq_restore(flags);
36 }
37 }
38
39 void local_flush_tlb_range(struct vm_area_stru
40 unsigned long end)
41 {
42 struct mm_struct *mm = vma->vm_mm;
43 unsigned int cpu = smp_processor_id();
44
45 if (cpu_context(cpu, mm) != NO_CONTEXT
46 unsigned long flags;
47 int size;
48
49 local_irq_save(flags);
50 size = (end - start + (PAGE_SI
51 if (size > (MMU_NTLB_ENTRIES/4
52 cpu_context(cpu, mm) =
53 if (mm == current->mm)
54 activate_conte
55 } else {
56 unsigned long asid;
57 unsigned long saved_as
58
59 asid = cpu_asid(cpu, m
60 start &= PAGE_MASK;
61 end += (PAGE_SIZE - 1)
62 end &= PAGE_MASK;
63 if (mm != current->mm)
64 saved_asid = g
65 set_asid(asid)
66 }
67 while (start < end) {
68 local_flush_tl
69 start += PAGE_
70 }
71 if (saved_asid != MMU_
72 set_asid(saved
73 }
74 local_irq_restore(flags);
75 }
76 }
77
78 void local_flush_tlb_kernel_range(unsigned lon
79 {
80 unsigned int cpu = smp_processor_id();
81 unsigned long flags;
82 int size;
83
84 local_irq_save(flags);
85 size = (end - start + (PAGE_SIZE - 1))
86 if (size > (MMU_NTLB_ENTRIES/4)) { /*
87 local_flush_tlb_all();
88 } else {
89 unsigned long asid;
90 unsigned long saved_asid = get
91
92 asid = cpu_asid(cpu, &init_mm)
93 start &= PAGE_MASK;
94 end += (PAGE_SIZE - 1);
95 end &= PAGE_MASK;
96 set_asid(asid);
97 while (start < end) {
98 local_flush_tlb_one(as
99 start += PAGE_SIZE;
100 }
101 set_asid(saved_asid);
102 }
103 local_irq_restore(flags);
104 }
105
106 void local_flush_tlb_mm(struct mm_struct *mm)
107 {
108 unsigned int cpu = smp_processor_id();
109
110 /* Invalidate all TLB of this process.
111 /* Instead of invalidating each TLB, w
112 if (cpu_context(cpu, mm) != NO_CONTEXT
113 unsigned long flags;
114
115 local_irq_save(flags);
116 cpu_context(cpu, mm) = NO_CONT
117 if (mm == current->mm)
118 activate_context(mm, c
119 local_irq_restore(flags);
120 }
121 }
122
123 void __flush_tlb_global(void)
124 {
125 unsigned long flags;
126
127 local_irq_save(flags);
128
129 /*
130 * This is the most destructive of the
131 * and will tear down all of the UTLB/
132 * wired entries.
133 */
134 __raw_writel(__raw_readl(MMUCR) | MMUC
135
136 local_irq_restore(flags);
137 }
138
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