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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 
ipi_flush_tlb_all(void * ignored)27 static inline void ipi_flush_tlb_all(void *ignored)
28 {
29 	local_flush_tlb_all();
30 }
31 
ipi_flush_tlb_mm(void * arg)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 
ipi_flush_tlb_page(void * arg)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 
ipi_flush_tlb_kernel_page(void * arg)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 
ipi_flush_tlb_range(void * arg)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 
ipi_flush_tlb_kernel_range(void * arg)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 
flush_tlb_all(void)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 
flush_tlb_mm(struct mm_struct * mm)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 
flush_tlb_page(struct vm_area_struct * vma,unsigned long uaddr)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 
flush_tlb_kernel_page(unsigned long kaddr)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 
flush_tlb_range(struct vm_area_struct * vma,unsigned long start,unsigned long end)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 
flush_tlb_kernel_range(unsigned long start,unsigned long end)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 
130