diff options
Diffstat (limited to 'util/cacheflush.c')
-rw-r--r-- | util/cacheflush.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/util/cacheflush.c b/util/cacheflush.c new file mode 100644 index 0000000000..2881832a38 --- /dev/null +++ b/util/cacheflush.c @@ -0,0 +1,71 @@ +/* + * Flush the host cpu caches. + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ + +#include "qemu/osdep.h" +#include "qemu/cacheflush.h" + + +#if defined(__i386__) || defined(__x86_64__) || defined(__s390__) + +/* Caches are coherent and do not require flushing; symbol inline. */ + +#elif defined(__mips__) + +#ifdef __OpenBSD__ +#include <machine/sysarch.h> +#else +#include <sys/cachectl.h> +#endif + +void flush_icache_range(uintptr_t start, uintptr_t stop) +{ + cacheflush((void *)start, stop - start, ICACHE); +} + +#elif defined(__powerpc__) + +void flush_icache_range(uintptr_t start, uintptr_t stop) +{ + uintptr_t p, start1, stop1; + size_t dsize = qemu_dcache_linesize; + size_t isize = qemu_icache_linesize; + + start1 = start & ~(dsize - 1); + stop1 = (stop + dsize - 1) & ~(dsize - 1); + for (p = start1; p < stop1; p += dsize) { + asm volatile ("dcbst 0,%0" : : "r"(p) : "memory"); + } + asm volatile ("sync" : : : "memory"); + + start &= start & ~(isize - 1); + stop1 = (stop + isize - 1) & ~(isize - 1); + for (p = start1; p < stop1; p += isize) { + asm volatile ("icbi 0,%0" : : "r"(p) : "memory"); + } + asm volatile ("sync" : : : "memory"); + asm volatile ("isync" : : : "memory"); +} + +#elif defined(__sparc__) + +void flush_icache_range(uintptr_t start, uintptr_t stop) +{ + uintptr_t p; + + for (p = start & -8; p < ((stop + 7) & -8); p += 8) { + __asm__ __volatile__("flush\t%0" : : "r" (p)); + } +} + +#else + +void flush_icache_range(uintptr_t start, uintptr_t stop) +{ + __builtin___clear_cache((char *)start, (char *)stop); +} + +#endif |