1 /*
2 * arch/arm/include/asm/outercache.h
3 *
4 * Copyright (C) 2010 ARM Ltd.
5 * Written by Catalin Marinas <catalin.marinas@arm.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21 #ifndef __ASM_OUTERCACHE_H
22 #define __ASM_OUTERCACHE_H
23
24 #include <linux/types.h>
25
26 struct l2x0_regs;
27
28 struct outer_cache_fns {
29 void (*inv_range)(unsigned long, unsigned long);
30 void (*clean_range)(unsigned long, unsigned long);
31 void (*flush_range)(unsigned long, unsigned long);
32 void (*flush_all)(void);
33 void (*disable)(void);
34 #ifdef CONFIG_OUTER_CACHE_SYNC
35 void (*sync)(void);
36 #endif
37 void (*resume)(void);
38
39 /* This is an ARM L2C thing */
40 void (*write_sec)(unsigned long, unsigned);
41 void (*configure)(const struct l2x0_regs *);
42 };
43
44 extern struct outer_cache_fns outer_cache;
45
46 #ifdef CONFIG_OUTER_CACHE
47 /**
48 * outer_inv_range - invalidate range of outer cache lines
49 * @start: starting physical address, inclusive
50 * @end: end physical address, exclusive
51 */
outer_inv_range(phys_addr_t start,phys_addr_t end)52 static inline void outer_inv_range(phys_addr_t start, phys_addr_t end)
53 {
54 if (outer_cache.inv_range)
55 outer_cache.inv_range(start, end);
56 }
57
58 /**
59 * outer_clean_range - clean dirty outer cache lines
60 * @start: starting physical address, inclusive
61 * @end: end physical address, exclusive
62 */
outer_clean_range(phys_addr_t start,phys_addr_t end)63 static inline void outer_clean_range(phys_addr_t start, phys_addr_t end)
64 {
65 if (outer_cache.clean_range)
66 outer_cache.clean_range(start, end);
67 }
68
69 /**
70 * outer_flush_range - clean and invalidate outer cache lines
71 * @start: starting physical address, inclusive
72 * @end: end physical address, exclusive
73 */
outer_flush_range(phys_addr_t start,phys_addr_t end)74 static inline void outer_flush_range(phys_addr_t start, phys_addr_t end)
75 {
76 if (outer_cache.flush_range)
77 outer_cache.flush_range(start, end);
78 }
79
80 /**
81 * outer_flush_all - clean and invalidate all cache lines in the outer cache
82 *
83 * Note: depending on implementation, this may not be atomic - it must
84 * only be called with interrupts disabled and no other active outer
85 * cache masters.
86 *
87 * It is intended that this function is only used by implementations
88 * needing to override the outer_cache.disable() method due to security.
89 * (Some implementations perform this as a clean followed by an invalidate.)
90 */
outer_flush_all(void)91 static inline void outer_flush_all(void)
92 {
93 if (outer_cache.flush_all)
94 outer_cache.flush_all();
95 }
96
97 /**
98 * outer_disable - clean, invalidate and disable the outer cache
99 *
100 * Disable the outer cache, ensuring that any data contained in the outer
101 * cache is pushed out to lower levels of system memory. The note and
102 * conditions above concerning outer_flush_all() applies here.
103 */
104 extern void outer_disable(void);
105
106 /**
107 * outer_resume - restore the cache configuration and re-enable outer cache
108 *
109 * Restore any configuration that the cache had when previously enabled,
110 * and re-enable the outer cache.
111 */
outer_resume(void)112 static inline void outer_resume(void)
113 {
114 if (outer_cache.resume)
115 outer_cache.resume();
116 }
117
118 #else
119
outer_inv_range(phys_addr_t start,phys_addr_t end)120 static inline void outer_inv_range(phys_addr_t start, phys_addr_t end)
121 { }
outer_clean_range(phys_addr_t start,phys_addr_t end)122 static inline void outer_clean_range(phys_addr_t start, phys_addr_t end)
123 { }
outer_flush_range(phys_addr_t start,phys_addr_t end)124 static inline void outer_flush_range(phys_addr_t start, phys_addr_t end)
125 { }
outer_flush_all(void)126 static inline void outer_flush_all(void) { }
outer_disable(void)127 static inline void outer_disable(void) { }
outer_resume(void)128 static inline void outer_resume(void) { }
129
130 #endif
131
132 #endif /* __ASM_OUTERCACHE_H */
133
