aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm/include/asm/proc-fns.h
blob: 5324c1112f3aeef9287567e83b012399a1e04fd2 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
/*
 *  arch/arm/include/asm/proc-fns.h
 *
 *  Copyright (C) 1997-1999 Russell King
 *  Copyright (C) 2000 Deep Blue Solutions Ltd
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef __ASM_PROCFNS_H
#define __ASM_PROCFNS_H

#ifdef __KERNEL__

#include <asm/glue-proc.h>
#include <asm/page.h>

#ifndef __ASSEMBLY__

struct mm_struct;

/*
 * Don't change this structure - ASM code relies on it.
 */
extern struct processor {
	/* MISC
	 * get data abort address/flags
	 */
	void (*_data_abort)(unsigned long pc);
	/*
	 * Retrieve prefetch fault address
	 */
	unsigned long (*_prefetch_abort)(unsigned long lr);
	/*
	 * Set up any processor specifics
	 */
	void (*_proc_init)(void);
	/*
	 * Disable any processor specifics
	 */
	void (*_proc_fin)(void);
	/*
	 * Special stuff for a reset
	 */
	void (*reset)(unsigned long addr) __attribute__((noreturn));
	/*
	 * Idle the processor
	 */
	int (*_do_idle)(void);
	/*
	 * Processor architecture specific
	 */
	/*
	 * clean a virtual address range from the
	 * D-cache without flushing the cache.
	 */
	void (*dcache_clean_area)(void *addr, int size);

	/*
	 * Set the page table
	 */
	void (*switch_mm)(phys_addr_t pgd_phys, struct mm_struct *mm);
	/*
	 * Set a possibly extended PTE.  Non-extended PTEs should
	 * ignore 'ext'.
	 */
#ifdef CONFIG_ARM_LPAE
	void (*set_pte_ext)(pte_t *ptep, pte_t pte);
#else
	void (*set_pte_ext)(pte_t *ptep, pte_t pte, unsigned int ext);
#endif

	/* Suspend/resume */
	unsigned int suspend_size;
	void (*do_suspend)(void *);
	void (*do_resume)(void *);
} processor;

#ifndef MULTI_CPU
extern void cpu_proc_init(void);
extern void cpu_proc_fin(void);
extern int cpu_do_idle(void);
extern void cpu_dcache_clean_area(void *, int);
extern void cpu_do_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
#ifdef CONFIG_ARM_LPAE
extern void cpu_set_pte_ext(pte_t *ptep, pte_t pte);
#else
extern void cpu_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
#endif
extern void cpu_reset(unsigned long addr) __attribute__((noreturn));

/* These three are private to arch/arm/kernel/suspend.c */
extern void cpu_do_suspend(void *);
extern void cpu_do_resume(void *);
#else
#define cpu_proc_init			processor._proc_init
#define cpu_proc_fin			processor._proc_fin
#define cpu_reset			processor.reset
#define cpu_do_idle			processor._do_idle
#define cpu_dcache_clean_area		processor.dcache_clean_area
#define cpu_set_pte_ext			processor.set_pte_ext
#define cpu_do_switch_mm		processor.switch_mm

/* These three are private to arch/arm/kernel/suspend.c */
#define cpu_do_suspend			processor.do_suspend
#define cpu_do_resume			processor.do_resume
#endif

extern void cpu_resume(void);

#include <asm/memory.h>

#ifdef CONFIG_MMU

#define cpu_switch_mm(pgd,mm) cpu_do_switch_mm(virt_to_phys(pgd),mm)

#ifdef CONFIG_ARM_LPAE

#define cpu_get_ttbr(nr)					\
	({							\
		u64 ttbr;					\
		__asm__("mrrc	p15, " #nr ", %Q0, %R0, c2"	\
			: "=r" (ttbr));				\
		ttbr;						\
	})

#define cpu_set_ttbr(nr, val)					\
	do {							\
		u64 ttbr = val;					\
		__asm__("mcrr	p15, " #nr ", %Q0, %R0, c2"	\
			: : "r" (ttbr));			\
	} while (0)

#define cpu_get_pgd()	\
	({						\
		u64 pg = cpu_get_ttbr(0);		\
		pg &= ~(PTRS_PER_PGD*sizeof(pgd_t)-1);	\
		(pgd_t *)phys_to_virt(pg);		\
	})
#else
#define cpu_get_pgd()	\
	({						\
		unsigned long pg;			\
		__asm__("mrc	p15, 0, %0, c2, c0, 0"	\
			 : "=r" (pg) : : "cc");		\
		pg &= ~0x3fff;				\
		(pgd_t *)phys_to_virt(pg);		\
	})
#endif

#else	/*!CONFIG_MMU */

#define cpu_switch_mm(pgd,mm)	{ }

#endif

#endif /* __ASSEMBLY__ */
#endif /* __KERNEL__ */
#endif /* __ASM_PROCFNS_H */