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8#ifndef __ASM_PROCFNS_H
9#define __ASM_PROCFNS_H
10
11#ifdef __KERNEL__
12
13#include <asm/glue-proc.h>
14#include <asm/page.h>
15
16#ifndef __ASSEMBLY__
17
18struct mm_struct;
19
20
21
22
23struct processor {
24
25
26
27 void (*_data_abort)(unsigned long pc);
28
29
30
31 unsigned long (*_prefetch_abort)(unsigned long lr);
32
33
34
35 void (*_proc_init)(void);
36
37
38
39 void (*check_bugs)(void);
40
41
42
43 void (*_proc_fin)(void);
44
45
46
47 void (*reset)(unsigned long addr, bool hvc) __attribute__((noreturn));
48
49
50
51 int (*_do_idle)(void);
52
53
54
55
56
57
58
59 void (*dcache_clean_area)(void *addr, int size);
60
61
62
63
64 void (*switch_mm)(phys_addr_t pgd_phys, struct mm_struct *mm);
65
66
67
68
69#ifdef CONFIG_ARM_LPAE
70 void (*set_pte_ext)(pte_t *ptep, pte_t pte);
71#else
72 void (*set_pte_ext)(pte_t *ptep, pte_t pte, unsigned int ext);
73#endif
74
75
76 unsigned int suspend_size;
77 void (*do_suspend)(void *);
78 void (*do_resume)(void *);
79};
80
81#ifndef MULTI_CPU
82static inline void init_proc_vtable(const struct processor *p)
83{
84}
85
86extern void cpu_proc_init(void);
87extern void cpu_proc_fin(void);
88extern int cpu_do_idle(void);
89extern void cpu_dcache_clean_area(void *, int);
90extern void cpu_do_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
91#ifdef CONFIG_ARM_LPAE
92extern void cpu_set_pte_ext(pte_t *ptep, pte_t pte);
93#else
94extern void cpu_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
95#endif
96extern void cpu_reset(unsigned long addr, bool hvc) __attribute__((noreturn));
97
98
99extern void cpu_do_suspend(void *);
100extern void cpu_do_resume(void *);
101#else
102
103extern struct processor processor;
104#if defined(CONFIG_BIG_LITTLE) && defined(CONFIG_HARDEN_BRANCH_PREDICTOR)
105#include <linux/smp.h>
106
107
108
109
110
111
112
113extern struct processor *cpu_vtable[];
114#define PROC_VTABLE(f) cpu_vtable[smp_processor_id()]->f
115#define PROC_TABLE(f) cpu_vtable[0]->f
116static inline void init_proc_vtable(const struct processor *p)
117{
118 unsigned int cpu = smp_processor_id();
119 *cpu_vtable[cpu] = *p;
120 WARN_ON_ONCE(cpu_vtable[cpu]->dcache_clean_area !=
121 cpu_vtable[0]->dcache_clean_area);
122 WARN_ON_ONCE(cpu_vtable[cpu]->set_pte_ext !=
123 cpu_vtable[0]->set_pte_ext);
124}
125#else
126#define PROC_VTABLE(f) processor.f
127#define PROC_TABLE(f) processor.f
128static inline void init_proc_vtable(const struct processor *p)
129{
130 processor = *p;
131}
132#endif
133
134#define cpu_proc_init PROC_VTABLE(_proc_init)
135#define cpu_check_bugs PROC_VTABLE(check_bugs)
136#define cpu_proc_fin PROC_VTABLE(_proc_fin)
137#define cpu_reset PROC_VTABLE(reset)
138#define cpu_do_idle PROC_VTABLE(_do_idle)
139#define cpu_dcache_clean_area PROC_TABLE(dcache_clean_area)
140#define cpu_set_pte_ext PROC_TABLE(set_pte_ext)
141#define cpu_do_switch_mm PROC_VTABLE(switch_mm)
142
143
144#define cpu_do_suspend PROC_VTABLE(do_suspend)
145#define cpu_do_resume PROC_VTABLE(do_resume)
146#endif
147
148extern void cpu_resume(void);
149
150#include <asm/memory.h>
151
152#ifdef CONFIG_MMU
153
154#define cpu_switch_mm(pgd,mm) cpu_do_switch_mm(virt_to_phys(pgd),mm)
155
156#ifdef CONFIG_ARM_LPAE
157
158#define cpu_get_ttbr(nr) \
159 ({ \
160 u64 ttbr; \
161 __asm__("mrrc p15, " #nr ", %Q0, %R0, c2" \
162 : "=r" (ttbr)); \
163 ttbr; \
164 })
165
166#define cpu_get_pgd() \
167 ({ \
168 u64 pg = cpu_get_ttbr(0); \
169 pg &= ~(PTRS_PER_PGD*sizeof(pgd_t)-1); \
170 (pgd_t *)phys_to_virt(pg); \
171 })
172#else
173#define cpu_get_pgd() \
174 ({ \
175 unsigned long pg; \
176 __asm__("mrc p15, 0, %0, c2, c0, 0" \
177 : "=r" (pg) : : "cc"); \
178 pg &= ~0x3fff; \
179 (pgd_t *)phys_to_virt(pg); \
180 })
181#endif
182
183#else
184
185#define cpu_switch_mm(pgd,mm) { }
186
187#endif
188
189#endif
190#endif
191#endif
192