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| author | Paul Burton <paul.burton@imgtec.com> | 2016-09-21 11:18:48 +0100 |
|---|---|---|
| committer | Daniel Schwierzeck <daniel.schwierzeck@gmail.com> | 2016-09-21 15:04:04 +0200 |
| commit | 8cb4817d0f076605c5126f0925f6c7fdb0461bf6 (patch) | |
| tree | 2a0ee6d92cec0d877ec0a3690b8d75ddbde27168 /arch/mips/include/asm | |
| parent | 0dfe04d6c8a52624c5404392168e52fe70fe0dc9 (diff) | |
| download | u-boot-8cb4817d0f076605c5126f0925f6c7fdb0461bf6.tar.gz | |
MIPS: Probe cache line sizes once during boot
Rather than probing the cache line sizes on every call of any cache
maintenance function, probe them once during boot & store the values in
the global data structure for later use. This will reduce the overhead
of the cache maintenance functions, which isn't a big deal yet but
becomes more important once L2 caches which may expose their properties
via coprocessor 2 or the CM are supported.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Diffstat (limited to 'arch/mips/include/asm')
| -rw-r--r-- | arch/mips/include/asm/cache.h | 9 | ||||
| -rw-r--r-- | arch/mips/include/asm/global_data.h | 4 |
2 files changed, 13 insertions, 0 deletions
diff --git a/arch/mips/include/asm/cache.h b/arch/mips/include/asm/cache.h index 0cea581e5d..669c362a52 100644 --- a/arch/mips/include/asm/cache.h +++ b/arch/mips/include/asm/cache.h @@ -19,4 +19,13 @@ */ #define CONFIG_SYS_CACHELINE_SIZE ARCH_DMA_MINALIGN +/** + * mips_cache_probe() - Probe the properties of the caches + * + * Call this to probe the properties such as line sizes of the caches + * present in the system, if any. This must be done before cache maintenance + * functions such as flush_cache may be called. + */ +void mips_cache_probe(void); + #endif /* __MIPS_CACHE_H__ */ diff --git a/arch/mips/include/asm/global_data.h b/arch/mips/include/asm/global_data.h index 37f8ed52e6..8533b691b6 100644 --- a/arch/mips/include/asm/global_data.h +++ b/arch/mips/include/asm/global_data.h @@ -21,6 +21,10 @@ struct arch_global_data { unsigned long rev; unsigned long ver; #endif +#ifdef CONFIG_SYS_CACHE_SIZE_AUTO + unsigned short l1i_line_size; + unsigned short l1d_line_size; +#endif }; #include <asm-generic/global_data.h> |