| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 2 | /* |
| 3 | * arch/arm/include/asm/outercache.h |
| 4 | * |
| 5 | * Copyright (C) 2010 ARM Ltd. |
| 6 | * Written by Catalin Marinas <catalin.marinas@arm.com> |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 */ |