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Catalin Marinas33f663f2010-03-24 16:46:52 +01001/*
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
Will Deaconad6b9c92011-02-15 12:41:49 +010024#include <linux/types.h>
25
Catalin Marinas33f663f2010-03-24 16:46:52 +010026struct outer_cache_fns {
27 void (*inv_range)(unsigned long, unsigned long);
28 void (*clean_range)(unsigned long, unsigned long);
29 void (*flush_range)(unsigned long, unsigned long);
Thomas Gleixnerae360a72010-07-31 21:06:06 +053030 void (*flush_all)(void);
Thomas Gleixnerae360a72010-07-31 21:06:06 +053031 void (*disable)(void);
Catalin Marinas319f5512010-03-24 16:47:53 +010032#ifdef CONFIG_OUTER_CACHE_SYNC
33 void (*sync)(void);
34#endif
Barry Song91c2ebb2011-09-30 14:43:12 +010035 void (*resume)(void);
Russell King8abd2592014-03-16 17:38:08 +000036
37 /* This is an ARM L2C thing */
38 void (*set_debug)(unsigned long);
39 void (*write_sec)(unsigned long, unsigned);
Catalin Marinas33f663f2010-03-24 16:46:52 +010040};
41
Catalin Marinas33f663f2010-03-24 16:46:52 +010042extern struct outer_cache_fns outer_cache;
43
Rob Herring0b53c112013-08-17 20:12:57 -050044#ifdef CONFIG_OUTER_CACHE
Russell Kingbc4f94d2014-03-16 10:52:55 +000045/**
46 * outer_inv_range - invalidate range of outer cache lines
47 * @start: starting physical address, inclusive
48 * @end: end physical address, exclusive
49 */
Will Deaconad6b9c92011-02-15 12:41:49 +010050static inline void outer_inv_range(phys_addr_t start, phys_addr_t end)
Catalin Marinas33f663f2010-03-24 16:46:52 +010051{
52 if (outer_cache.inv_range)
53 outer_cache.inv_range(start, end);
54}
Russell Kingbc4f94d2014-03-16 10:52:55 +000055
56/**
57 * outer_clean_range - clean dirty outer cache lines
58 * @start: starting physical address, inclusive
59 * @end: end physical address, exclusive
60 */
Will Deaconad6b9c92011-02-15 12:41:49 +010061static inline void outer_clean_range(phys_addr_t start, phys_addr_t end)
Catalin Marinas33f663f2010-03-24 16:46:52 +010062{
63 if (outer_cache.clean_range)
64 outer_cache.clean_range(start, end);
65}
Russell Kingbc4f94d2014-03-16 10:52:55 +000066
67/**
68 * outer_flush_range - clean and invalidate outer cache lines
69 * @start: starting physical address, inclusive
70 * @end: end physical address, exclusive
71 */
Will Deaconad6b9c92011-02-15 12:41:49 +010072static inline void outer_flush_range(phys_addr_t start, phys_addr_t end)
Catalin Marinas33f663f2010-03-24 16:46:52 +010073{
74 if (outer_cache.flush_range)
75 outer_cache.flush_range(start, end);
76}
77
Russell Kingbc4f94d2014-03-16 10:52:55 +000078/**
79 * outer_flush_all - clean and invalidate all cache lines in the outer cache
80 *
81 * Note: depending on implementation, this may not be atomic - it must
82 * only be called with interrupts disabled and no other active outer
83 * cache masters.
84 *
85 * It is intended that this function is only used by implementations
86 * needing to override the outer_cache.disable() method due to security.
87 * (Some implementations perform this as a clean followed by an invalidate.)
88 */
Thomas Gleixnerae360a72010-07-31 21:06:06 +053089static inline void outer_flush_all(void)
90{
91 if (outer_cache.flush_all)
92 outer_cache.flush_all();
93}
94
Russell Kingbc4f94d2014-03-16 10:52:55 +000095/**
96 * outer_disable - clean, invalidate and disable the outer cache
97 *
98 * Disable the outer cache, ensuring that any data contained in the outer
99 * cache is pushed out to lower levels of system memory. The note and
100 * conditions above concerning outer_flush_all() applies here.
101 */
Russell King1f1d5b72014-03-16 13:14:38 +0000102extern void outer_disable(void);
Thomas Gleixnerae360a72010-07-31 21:06:06 +0530103
Russell Kingbc4f94d2014-03-16 10:52:55 +0000104/**
105 * outer_resume - restore the cache configuration and re-enable outer cache
106 *
107 * Restore any configuration that the cache had when previously enabled,
108 * and re-enable the outer cache.
109 */
Barry Song91c2ebb2011-09-30 14:43:12 +0100110static inline void outer_resume(void)
111{
112 if (outer_cache.resume)
113 outer_cache.resume();
114}
115
Catalin Marinas33f663f2010-03-24 16:46:52 +0100116#else
117
Will Deaconad6b9c92011-02-15 12:41:49 +0100118static inline void outer_inv_range(phys_addr_t start, phys_addr_t end)
Catalin Marinas33f663f2010-03-24 16:46:52 +0100119{ }
Will Deaconad6b9c92011-02-15 12:41:49 +0100120static inline void outer_clean_range(phys_addr_t start, phys_addr_t end)
Catalin Marinas33f663f2010-03-24 16:46:52 +0100121{ }
Will Deaconad6b9c92011-02-15 12:41:49 +0100122static inline void outer_flush_range(phys_addr_t start, phys_addr_t end)
Catalin Marinas33f663f2010-03-24 16:46:52 +0100123{ }
Thomas Gleixnerae360a72010-07-31 21:06:06 +0530124static inline void outer_flush_all(void) { }
Thomas Gleixnerae360a72010-07-31 21:06:06 +0530125static inline void outer_disable(void) { }
Barry Song4e79a622013-02-04 07:46:57 +0100126static inline void outer_resume(void) { }
Catalin Marinas33f663f2010-03-24 16:46:52 +0100127
128#endif
129
Catalin Marinas319f5512010-03-24 16:47:53 +0100130#ifdef CONFIG_OUTER_CACHE_SYNC
Russell Kingbc4f94d2014-03-16 10:52:55 +0000131/**
132 * outer_sync - perform a sync point for outer cache
133 *
134 * Ensure that all outer cache operations are complete and any store
135 * buffers are drained.
136 */
Catalin Marinas319f5512010-03-24 16:47:53 +0100137static inline void outer_sync(void)
138{
139 if (outer_cache.sync)
140 outer_cache.sync();
141}
142#else
143static inline void outer_sync(void)
144{ }
145#endif
146
Catalin Marinas33f663f2010-03-24 16:46:52 +0100147#endif /* __ASM_OUTERCACHE_H */