Loading...
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
16static void on_each_cpu_mask(void (*func)(void *), void *info, int wait,
17 const struct cpumask *mask)
18{
19 preempt_disable();
20
21 smp_call_function_many(mask, func, info, wait);
22 if (cpumask_test_cpu(smp_processor_id(), mask))
23 func(info);
24
25 preempt_enable();
26}
27
28/**********************************************************************/
29
30/*
31 * TLB operations
32 */
33struct tlb_args {
34 struct vm_area_struct *ta_vma;
35 unsigned long ta_start;
36 unsigned long ta_end;
37};
38
39static inline void ipi_flush_tlb_all(void *ignored)
40{
41 local_flush_tlb_all();
42}
43
44static inline void ipi_flush_tlb_mm(void *arg)
45{
46 struct mm_struct *mm = (struct mm_struct *)arg;
47
48 local_flush_tlb_mm(mm);
49}
50
51static inline void ipi_flush_tlb_page(void *arg)
52{
53 struct tlb_args *ta = (struct tlb_args *)arg;
54
55 local_flush_tlb_page(ta->ta_vma, ta->ta_start);
56}
57
58static inline void ipi_flush_tlb_kernel_page(void *arg)
59{
60 struct tlb_args *ta = (struct tlb_args *)arg;
61
62 local_flush_tlb_kernel_page(ta->ta_start);
63}
64
65static inline void ipi_flush_tlb_range(void *arg)
66{
67 struct tlb_args *ta = (struct tlb_args *)arg;
68
69 local_flush_tlb_range(ta->ta_vma, ta->ta_start, ta->ta_end);
70}
71
72static inline void ipi_flush_tlb_kernel_range(void *arg)
73{
74 struct tlb_args *ta = (struct tlb_args *)arg;
75
76 local_flush_tlb_kernel_range(ta->ta_start, ta->ta_end);
77}
78
79void flush_tlb_all(void)
80{
81 if (tlb_ops_need_broadcast())
82 on_each_cpu(ipi_flush_tlb_all, NULL, 1);
83 else
84 local_flush_tlb_all();
85}
86
87void flush_tlb_mm(struct mm_struct *mm)
88{
89 if (tlb_ops_need_broadcast())
90 on_each_cpu_mask(ipi_flush_tlb_mm, mm, 1, mm_cpumask(mm));
91 else
92 local_flush_tlb_mm(mm);
93}
94
95void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr)
96{
97 if (tlb_ops_need_broadcast()) {
98 struct tlb_args ta;
99 ta.ta_vma = vma;
100 ta.ta_start = uaddr;
101 on_each_cpu_mask(ipi_flush_tlb_page, &ta, 1, mm_cpumask(vma->vm_mm));
102 } else
103 local_flush_tlb_page(vma, uaddr);
104}
105
106void flush_tlb_kernel_page(unsigned long kaddr)
107{
108 if (tlb_ops_need_broadcast()) {
109 struct tlb_args ta;
110 ta.ta_start = kaddr;
111 on_each_cpu(ipi_flush_tlb_kernel_page, &ta, 1);
112 } else
113 local_flush_tlb_kernel_page(kaddr);
114}
115
116void flush_tlb_range(struct vm_area_struct *vma,
117 unsigned long start, unsigned long end)
118{
119 if (tlb_ops_need_broadcast()) {
120 struct tlb_args ta;
121 ta.ta_vma = vma;
122 ta.ta_start = start;
123 ta.ta_end = end;
124 on_each_cpu_mask(ipi_flush_tlb_range, &ta, 1, mm_cpumask(vma->vm_mm));
125 } else
126 local_flush_tlb_range(vma, start, end);
127}
128
129void flush_tlb_kernel_range(unsigned long start, unsigned long end)
130{
131 if (tlb_ops_need_broadcast()) {
132 struct tlb_args ta;
133 ta.ta_start = start;
134 ta.ta_end = end;
135 on_each_cpu(ipi_flush_tlb_kernel_range, &ta, 1);
136 } else
137 local_flush_tlb_kernel_range(start, end);
138}
139
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#include <asm/mmu_context.h>
16
17/**********************************************************************/
18
19/*
20 * TLB operations
21 */
22struct tlb_args {
23 struct vm_area_struct *ta_vma;
24 unsigned long ta_start;
25 unsigned long ta_end;
26};
27
28static inline void ipi_flush_tlb_all(void *ignored)
29{
30 local_flush_tlb_all();
31}
32
33static inline void ipi_flush_tlb_mm(void *arg)
34{
35 struct mm_struct *mm = (struct mm_struct *)arg;
36
37 local_flush_tlb_mm(mm);
38}
39
40static inline void ipi_flush_tlb_page(void *arg)
41{
42 struct tlb_args *ta = (struct tlb_args *)arg;
43
44 local_flush_tlb_page(ta->ta_vma, ta->ta_start);
45}
46
47static inline void ipi_flush_tlb_kernel_page(void *arg)
48{
49 struct tlb_args *ta = (struct tlb_args *)arg;
50
51 local_flush_tlb_kernel_page(ta->ta_start);
52}
53
54static inline void ipi_flush_tlb_range(void *arg)
55{
56 struct tlb_args *ta = (struct tlb_args *)arg;
57
58 local_flush_tlb_range(ta->ta_vma, ta->ta_start, ta->ta_end);
59}
60
61static inline void ipi_flush_tlb_kernel_range(void *arg)
62{
63 struct tlb_args *ta = (struct tlb_args *)arg;
64
65 local_flush_tlb_kernel_range(ta->ta_start, ta->ta_end);
66}
67
68static inline void ipi_flush_bp_all(void *ignored)
69{
70 local_flush_bp_all();
71}
72
73#ifdef CONFIG_ARM_ERRATA_798181
74bool (*erratum_a15_798181_handler)(void);
75
76static bool erratum_a15_798181_partial(void)
77{
78 asm("mcr p15, 0, %0, c8, c3, 1" : : "r" (0));
79 dsb(ish);
80 return false;
81}
82
83static bool erratum_a15_798181_broadcast(void)
84{
85 asm("mcr p15, 0, %0, c8, c3, 1" : : "r" (0));
86 dsb(ish);
87 return true;
88}
89
90void erratum_a15_798181_init(void)
91{
92 unsigned int midr = read_cpuid_id();
93 unsigned int revidr = read_cpuid(CPUID_REVIDR);
94
95 /* Cortex-A15 r0p0..r3p2 w/o ECO fix affected */
96 if ((midr & 0xff0ffff0) != 0x410fc0f0 || midr > 0x413fc0f2 ||
97 (revidr & 0x210) == 0x210) {
98 return;
99 }
100 if (revidr & 0x10)
101 erratum_a15_798181_handler = erratum_a15_798181_partial;
102 else
103 erratum_a15_798181_handler = erratum_a15_798181_broadcast;
104}
105#endif
106
107static void ipi_flush_tlb_a15_erratum(void *arg)
108{
109 dmb();
110}
111
112static void broadcast_tlb_a15_erratum(void)
113{
114 if (!erratum_a15_798181())
115 return;
116
117 smp_call_function(ipi_flush_tlb_a15_erratum, NULL, 1);
118}
119
120static void broadcast_tlb_mm_a15_erratum(struct mm_struct *mm)
121{
122 int this_cpu;
123 cpumask_t mask = { CPU_BITS_NONE };
124
125 if (!erratum_a15_798181())
126 return;
127
128 this_cpu = get_cpu();
129 a15_erratum_get_cpumask(this_cpu, mm, &mask);
130 smp_call_function_many(&mask, ipi_flush_tlb_a15_erratum, NULL, 1);
131 put_cpu();
132}
133
134void flush_tlb_all(void)
135{
136 if (tlb_ops_need_broadcast())
137 on_each_cpu(ipi_flush_tlb_all, NULL, 1);
138 else
139 __flush_tlb_all();
140 broadcast_tlb_a15_erratum();
141}
142
143void flush_tlb_mm(struct mm_struct *mm)
144{
145 if (tlb_ops_need_broadcast())
146 on_each_cpu_mask(mm_cpumask(mm), ipi_flush_tlb_mm, mm, 1);
147 else
148 __flush_tlb_mm(mm);
149 broadcast_tlb_mm_a15_erratum(mm);
150}
151
152void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr)
153{
154 if (tlb_ops_need_broadcast()) {
155 struct tlb_args ta;
156 ta.ta_vma = vma;
157 ta.ta_start = uaddr;
158 on_each_cpu_mask(mm_cpumask(vma->vm_mm), ipi_flush_tlb_page,
159 &ta, 1);
160 } else
161 __flush_tlb_page(vma, uaddr);
162 broadcast_tlb_mm_a15_erratum(vma->vm_mm);
163}
164
165void flush_tlb_kernel_page(unsigned long kaddr)
166{
167 if (tlb_ops_need_broadcast()) {
168 struct tlb_args ta;
169 ta.ta_start = kaddr;
170 on_each_cpu(ipi_flush_tlb_kernel_page, &ta, 1);
171 } else
172 __flush_tlb_kernel_page(kaddr);
173 broadcast_tlb_a15_erratum();
174}
175
176void flush_tlb_range(struct vm_area_struct *vma,
177 unsigned long start, unsigned long end)
178{
179 if (tlb_ops_need_broadcast()) {
180 struct tlb_args ta;
181 ta.ta_vma = vma;
182 ta.ta_start = start;
183 ta.ta_end = end;
184 on_each_cpu_mask(mm_cpumask(vma->vm_mm), ipi_flush_tlb_range,
185 &ta, 1);
186 } else
187 local_flush_tlb_range(vma, start, end);
188 broadcast_tlb_mm_a15_erratum(vma->vm_mm);
189}
190
191void flush_tlb_kernel_range(unsigned long start, unsigned long end)
192{
193 if (tlb_ops_need_broadcast()) {
194 struct tlb_args ta;
195 ta.ta_start = start;
196 ta.ta_end = end;
197 on_each_cpu(ipi_flush_tlb_kernel_range, &ta, 1);
198 } else
199 local_flush_tlb_kernel_range(start, end);
200 broadcast_tlb_a15_erratum();
201}
202
203void flush_bp_all(void)
204{
205 if (tlb_ops_need_broadcast())
206 on_each_cpu(ipi_flush_bp_all, NULL, 1);
207 else
208 __flush_bp_all();
209}