1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * arch/arm/include/asm/outercache.h
4 *
5 * Copyright (C) 2010 ARM Ltd.
6 * Written by Catalin Marinas <catalin.marinas@arm.com>
7 */
8
9 #ifndef __ASM_OUTERCACHE_H
10 #define __ASM_OUTERCACHE_H
11
12 #include <linux/types.h>
13
14 struct l2x0_regs;
15
16 struct outer_cache_fns {
17 void (*inv_range)(unsigned long, unsigned long);
18 void (*clean_range)(unsigned long, unsigned long);
19 void (*flush_range)(unsigned long, unsigned long);
20 void (*flush_all)(void);
21 void (*disable)(void);
22 #ifdef CONFIG_OUTER_CACHE_SYNC
23 void (*sync)(void);
24 #endif
25 void (*resume)(void);
26
27 /* This is an ARM L2C thing */
28 void (*write_sec)(unsigned long, unsigned);
29 void (*configure)(const struct l2x0_regs *);
30 };
31
32 extern struct outer_cache_fns outer_cache;
33
34 #ifdef CONFIG_OUTER_CACHE
35 /**
36 * outer_inv_range - invalidate range of outer cache lines
37 * @start: starting physical address, inclusive
38 * @end: end physical address, exclusive
39 */
40 static inline void outer_inv_range(phys_addr_t start, phys_addr_t end)
41 {
42 if (outer_cache.inv_range)
43 outer_cache.inv_range(start, end);
44 }
45
46 /**
47 * outer_clean_range - clean dirty outer cache lines
48 * @start: starting physical address, inclusive
49 * @end: end physical address, exclusive
50 */
51 static inline void outer_clean_range(phys_addr_t start, phys_addr_t end)
52 {
53 if (outer_cache.clean_range)
54 outer_cache.clean_range(start, end);
55 }
56
57 /**
58 * outer_flush_range - clean and invalidate outer cache lines
59 * @start: starting physical address, inclusive
60 * @end: end physical address, exclusive
61 */
62 static inline void outer_flush_range(phys_addr_t start, phys_addr_t end)
63 {
64 if (outer_cache.flush_range)
65 outer_cache.flush_range(start, end);
66 }
67
68 /**
69 * outer_flush_all - clean and invalidate all cache lines in the outer cache
70 *
71 * Note: depending on implementation, this may not be atomic - it must
72 * only be called with interrupts disabled and no other active outer
73 * cache masters.
74 *
75 * It is intended that this function is only used by implementations
76 * needing to override the outer_cache.disable() method due to security.
77 * (Some implementations perform this as a clean followed by an invalidate.)
78 */
79 static inline void outer_flush_all(void)
80 {
81 if (outer_cache.flush_all)
82 outer_cache.flush_all();
83 }
84
85 /**
86 * outer_disable - clean, invalidate and disable the outer cache
87 *
88 * Disable the outer cache, ensuring that any data contained in the outer
89 * cache is pushed out to lower levels of system memory. The note and
90 * conditions above concerning outer_flush_all() applies here.
91 */
92 extern void outer_disable(void);
93
94 /**
95 * outer_resume - restore the cache configuration and re-enable outer cache
96 *
97 * Restore any configuration that the cache had when previously enabled,
98 * and re-enable the outer cache.
99 */
100 static inline void outer_resume(void)
101 {
102 if (outer_cache.resume)
103 outer_cache.resume();
104 }
105
106 #else
107
108 static inline void outer_inv_range(phys_addr_t start, phys_addr_t end)
109 { }
110 static inline void outer_clean_range(phys_addr_t start, phys_addr_t end)
111 { }
112 static inline void outer_flush_range(phys_addr_t start, phys_addr_t end)
113 { }
114 static inline void outer_flush_all(void) { }
115 static inline void outer_disable(void) { }
116 static inline void outer_resume(void) { }
117
118 #endif
119
120 #endif /* __ASM_OUTERCACHE_H */
121
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