diff options
Diffstat (limited to 'xen/include/asm-arm/page.h')
-rw-r--r-- | xen/include/asm-arm/page.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/xen/include/asm-arm/page.h b/xen/include/asm-arm/page.h index 69e9a61ab7..53d4b6391f 100644 --- a/xen/include/asm-arm/page.h +++ b/xen/include/asm-arm/page.h @@ -268,6 +268,38 @@ extern size_t cacheline_bytes; /* Functions for flushing medium-sized areas. * if 'range' is large enough we might want to use model-specific * full-cache flushes. */ + +static inline int invalidate_dcache_va_range(const void *p, unsigned long size) +{ + size_t off; + const void *end = p + size; + + dsb(sy); /* So the CPU issues all writes to the range */ + + off = (unsigned long)p % cacheline_bytes; + if ( off ) + { + p -= off; + asm volatile (__clean_and_invalidate_dcache_one(0) : : "r" (p)); + p += cacheline_bytes; + size -= cacheline_bytes - off; + } + off = (unsigned long)end % cacheline_bytes; + if ( off ) + { + end -= off; + size -= off; + asm volatile (__clean_and_invalidate_dcache_one(0) : : "r" (end)); + } + + for ( ; p < end; p += cacheline_bytes ) + asm volatile (__invalidate_dcache_one(0) : : "r" (p)); + + dsb(sy); /* So we know the flushes happen before continuing */ + + return 0; +} + static inline int clean_dcache_va_range(const void *p, unsigned long size) { const void *end; |