diff options
Diffstat (limited to 'lib_ppc')
| -rw-r--r-- | lib_ppc/cache.c | 36 |
1 files changed, 17 insertions, 19 deletions
diff --git a/lib_ppc/cache.c b/lib_ppc/cache.c index 72c838e4181..1292b71e6ef 100644 --- a/lib_ppc/cache.c +++ b/lib_ppc/cache.c @@ -25,29 +25,27 @@ #include <asm/cache.h> #include <watchdog.h> -void flush_cache (ulong start_addr, ulong size) +void flush_cache(ulong start_addr, ulong size) { #ifndef CONFIG_5xx - ulong addr, end_addr = start_addr + size; + ulong addr, start, end; - if (CONFIG_SYS_CACHELINE_SIZE) { - addr = start_addr & (CONFIG_SYS_CACHELINE_SIZE - 1); - for (addr = start_addr; - addr < end_addr; - addr += CONFIG_SYS_CACHELINE_SIZE) { - asm ("dcbst 0,%0": :"r" (addr)); - WATCHDOG_RESET(); - } - asm ("sync"); /* Wait for all dcbst to complete on bus */ + start = start_addr & ~(CONFIG_SYS_CACHELINE_SIZE - 1); + end = start_addr + size - 1; - for (addr = start_addr; - addr < end_addr; - addr += CONFIG_SYS_CACHELINE_SIZE) { - asm ("icbi 0,%0": :"r" (addr)); - WATCHDOG_RESET(); - } + for (addr = start; addr <= end; addr += CONFIG_SYS_CACHELINE_SIZE) { + asm volatile("dcbst 0,%0" : : "r" (addr) : "memory"); + WATCHDOG_RESET(); } - asm ("sync"); /* Always flush prefetch queue in any case */ - asm ("isync"); + /* wait for all dcbst to complete on bus */ + asm volatile("sync" : : : "memory"); + + for (addr = start; addr <= end; addr += CONFIG_SYS_CACHELINE_SIZE) { + asm volatile("icbi 0,%0" : : "r" (addr) : "memory"); + WATCHDOG_RESET(); + } + asm volatile("sync" : : : "memory"); + /* flush prefetch queue */ + asm volatile("isync" : : : "memory"); #endif } |