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Diffstat (limited to 'arch/arm/include/asm/outercache.h')
-rw-r--r-- | arch/arm/include/asm/outercache.h | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/arch/arm/include/asm/outercache.h b/arch/arm/include/asm/outercache.h new file mode 100644 index 0000000000..3364637755 --- /dev/null +++ b/arch/arm/include/asm/outercache.h @@ -0,0 +1,120 @@ +/* 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 */ |