From 219872c8fe890cd280cf54f27df86504bb17d277 Mon Sep 17 00:00:00 2001 From: Anatolij Gustschin Date: Mon, 2 Apr 2012 06:18:00 +0000 Subject: [PATCH] ARM1136: add cache flush and invalidate operations Since commit 5c1ad3e6f8ae578bbe30e09652f1531e9bc22031 (net: fec_mxc: allow use with cache enabled) the FEC_MXC driver uses flush_dcache_range() and invalidate_dcache_range() functions. This driver is also configured for ARM1136 based 'flea3' and 'mx35pdk' boards which currently do not build as there are no ARM1136 specific flush_dcache_range() and invalidate_dcache_range() functions. Add various ARM1136 cache functions to fix building for 'flea3' and 'mx35pdk'. Signed-off-by: Anatolij Gustschin Signed-off-by: Stefano Babic Cc: Fabio Estevam CC: Mike Frysinger CC: Marek Vasut Acked-by: Marek Vasut --- arch/arm/cpu/arm1136/cpu.c | 95 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 95 insertions(+) diff --git a/arch/arm/cpu/arm1136/cpu.c b/arch/arm/cpu/arm1136/cpu.c index 2b91631735..f2e30b5198 100644 --- a/arch/arm/cpu/arm1136/cpu.c +++ b/arch/arm/cpu/arm1136/cpu.c @@ -75,3 +75,98 @@ static void cache_flush(void) asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i)); /* invalidate both caches and flush btb */ asm ("mcr p15, 0, %0, c7, c10, 4": :"r" (i)); /* mem barrier to sync things */ } + +#ifndef CONFIG_SYS_DCACHE_OFF + +#ifndef CONFIG_SYS_CACHELINE_SIZE +#define CONFIG_SYS_CACHELINE_SIZE 32 +#endif + +void invalidate_dcache_all(void) +{ + asm ("mcr p15, 0, %0, c7, c6, 0" : : "r" (0)); +} + +void flush_dcache_all(void) +{ + asm ("mcr p15, 0, %0, c7, c10, 0" : : "r" (0)); + asm ("mcr p15, 0, %0, c7, c10, 4" : : "r" (0)); +} + +static inline int bad_cache_range(unsigned long start, unsigned long stop) +{ + int ok = 1; + + if (start & (CONFIG_SYS_CACHELINE_SIZE - 1)) + ok = 0; + + if (stop & (CONFIG_SYS_CACHELINE_SIZE - 1)) + ok = 0; + + if (!ok) + debug("CACHE: Misaligned operation at range [%08lx, %08lx]\n", + start, stop); + + return ok; +} + +void invalidate_dcache_range(unsigned long start, unsigned long stop) +{ + if (bad_cache_range(start, stop)) + return; + + while (start < stop) { + asm ("mcr p15, 0, %0, c7, c6, 1" : : "r" (start)); + start += CONFIG_SYS_CACHELINE_SIZE; + } +} + +void flush_dcache_range(unsigned long start, unsigned long stop) +{ + if (bad_cache_range(start, stop)) + return; + + while (start < stop) { + asm ("mcr p15, 0, %0, c7, c14, 1" : : "r" (start)); + start += CONFIG_SYS_CACHELINE_SIZE; + } + + asm ("mcr p15, 0, %0, c7, c10, 4" : : "r" (0)); +} + +void flush_cache(unsigned long start, unsigned long size) +{ + flush_dcache_range(start, start + size); +} + +void enable_caches(void) +{ +#ifndef CONFIG_SYS_ICACHE_OFF + icache_enable(); +#endif +#ifndef CONFIG_SYS_DCACHE_OFF + dcache_enable(); +#endif +} + +#else /* #ifndef CONFIG_SYS_DCACHE_OFF */ +void invalidate_dcache_all(void) +{ +} + +void flush_dcache_all(void) +{ +} + +void invalidate_dcache_range(unsigned long start, unsigned long stop) +{ +} + +void flush_dcache_range(unsigned long start, unsigned long stop) +{ +} + +void flush_cache(unsigned long start, unsigned long size) +{ +} +#endif /* #ifndef CONFIG_SYS_DCACHE_OFF */ -- 2.30.2