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| author |   Jes Sorensen <jes@sgi.com> | 2009-05-25 15:12:49 +0200 |
|---|---|---|
| committer |   Avi Kivity <avi@redhat.com> | 2009-06-07 09:28:11 +0300 |
| commit | aaf630a4dd27f8d6e7b4b4c3e44d537a310624f6 (patch) | |
| tree | 33277ed9dbb9c135ba3e9ec0089275b7a781b26d /cache-utils.h | |
| parent | Make qemu-kvm build and run again on ia64 (diff) | |
| download | qemu-kvm-aaf630a4dd27f8d6e7b4b4c3e44d537a310624f6.tar.gz qemu-kvm-aaf630a4dd27f8d6e7b4b4c3e44d537a310624f6.tar.bz2 qemu-kvm-aaf630a4dd27f8d6e7b4b4c3e44d537a310624f6.zip | |
Flush icache after dma operations for ia64
ia64 system depends on that platform issues snoop cycle to flush
icache for memory touched by DMA write operations, but virtual DMA
operations is emulated by memcpy, so use explict instrustions to flush
the related icache, otherwise, guest may use obsolete icache.
Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Jes Sorensen <jes@sgi.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'cache-utils.h')
| -rw-r--r-- | cache-utils.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/cache-utils.h b/cache-utils.h index b45fde44e..e4f27ef51 100644 --- a/cache-utils.h +++ b/cache-utils.h @@ -34,7 +34,28 @@ static inline void flush_icache_range(unsigned long start, unsigned long stop) asm volatile ("isync" : : : "memory"); } +/* + * Is this correct for PPC? + */ +static inline void dma_flush_range(unsigned long start, unsigned long stop) +{ +} + +#elif defined(__ia64__) +static inline void flush_icache_range(unsigned long start, unsigned long stop) +{ + while (start < stop) { + asm volatile ("fc %0" :: "r"(start)); + start += 32; + } + asm volatile (";;sync.i;;srlz.i;;"); +} +#define dma_flush_range(start, end) flush_icache_range(start, end) +#define qemu_cache_utils_init(envp) do { (void) (envp); } while (0) #else +static inline void dma_flush_range(unsigned long start, unsigned long stop) +{ +} #define qemu_cache_utils_init(envp) do { (void) (envp); } while (0) #endif |