summaryrefslogtreecommitdiff
path: root/arch/arm/include/asm/outercache.h
blob: 3364637755e86aa89ffd9ed4361a0d3dba58bfd6 (plain)
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
/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * arch/arm/include/asm/outercache.h
 *
 * Copyright (C) 2010 ARM Ltd.
 * Written by Catalin Marinas <catalin.marinas@arm.com>
 */

#ifndef __ASM_OUTERCACHE_H
#define __ASM_OUTERCACHE_H

#include <linux/types.h>

struct l2x0_regs;

struct outer_cache_fns {
	void (*inv_range)(unsigned long, unsigned long);
	void (*clean_range)(unsigned long, unsigned long);
	void (*flush_range)(unsigned long, unsigned long);
	void (*flush_all)(void);
	void (*disable)(void);
#ifdef CONFIG_OUTER_CACHE_SYNC
	void (*sync)(void);
#endif
	void (*resume)(void);

	/* This is an ARM L2C thing */
	void (*write_sec)(unsigned long, unsigned);
	void (*configure)(const struct l2x0_regs *);
};

extern struct outer_cache_fns outer_cache;

#ifdef CONFIG_OUTER_CACHE
/**
 * outer_inv_range - invalidate range of outer cache lines
 * @start: starting physical address, inclusive
 * @end: end physical address, exclusive
 */
static inline void outer_inv_range(phys_addr_t start, phys_addr_t end)
{
	if (outer_cache.inv_range)
		outer_cache.inv_range(start, end);
}

/**
 * outer_clean_range - clean dirty outer cache lines
 * @start: starting physical address, inclusive
 * @end: end physical address, exclusive
 */
static inline void outer_clean_range(phys_addr_t start, phys_addr_t end)
{
	if (outer_cache.clean_range)
		outer_cache.clean_range(start, end);
}

/**
 * outer_flush_range - clean and invalidate outer cache lines
 * @start: starting physical address, inclusive
 * @end: end physical address, exclusive
 */
static inline void outer_flush_range(phys_addr_t start, phys_addr_t end)
{
	if (outer_cache.flush_range)
		outer_cache.flush_range(start, end);
}

/**
 * outer_flush_all - clean and invalidate all cache lines in the outer cache
 *
 * Note: depending on implementation, this may not be atomic - it must
 * only be called with interrupts disabled and no other active outer
 * cache masters.
 *
 * It is intended that this function is only used by implementations
 * needing to override the outer_cache.disable() method due to security.
 * (Some implementations perform this as a clean followed by an invalidate.)
 */
static inline void outer_flush_all(void)
{
	if (outer_cache.flush_all)
		outer_cache.flush_all();
}

/**
 * outer_disable - clean, invalidate and disable the outer cache
 *
 * Disable the outer cache, ensuring that any data contained in the outer
 * cache is pushed out to lower levels of system memory.  The note and
 * conditions above concerning outer_flush_all() applies here.
 */
extern void outer_disable(void);

/**
 * outer_resume - restore the cache configuration and re-enable outer cache
 *
 * Restore any configuration that the cache had when previously enabled,
 * and re-enable the outer cache.
 */
static inline void outer_resume(void)
{
	if (outer_cache.resume)
		outer_cache.resume();
}

#else

static inline void outer_inv_range(phys_addr_t start, phys_addr_t end)
{ }
static inline void outer_clean_range(phys_addr_t start, phys_addr_t end)
{ }
static inline void outer_flush_range(phys_addr_t start, phys_addr_t end)
{ }
static inline void outer_flush_all(void) { }
static inline void outer_disable(void) { }
static inline void outer_resume(void) { }

#endif

#endif	/* __ASM_OUTERCACHE_H */