memory: add platform_shared_commit function

Adds platform_shared_commit function for keeping shared data
synchronized. It's used after usage of data shared by different
cores. Such data is either statically marked with SHARED_DATA
or dynamically allocated with SOF_MEM_FLAG_SHARED flag.
cAVS platforms use uncached memory region, so no additional
synchronization is needed, but for SMP platforms without
uncache this function should writeback and invalidate data.

Signed-off-by: Tomasz Lauda <tomasz.lauda@linux.intel.com>

src/platform/baytrail/include/platform/lib/memory.h

@@ -29,6 +29,15 @@ static inline void *platform_shared_get(void *ptr, int bytes)
 	return ptr;
 }
 
+/**
+ * \brief Function for keeping shared data synchronized.
+ * It's used after usage of data shared by different cores.
+ * Such data is either statically marked with SHARED_DATA
+ * or dynamically allocated with SOF_MEM_FLAG_SHARED flag.
+ * Does nothing, since BYT doesn't support SMP.
+ */
+static inline void platform_shared_commit(void *ptr, int bytes) { }
+
 static inline void *platform_rfree_prepare(void *ptr)
 {
 	return ptr;

src/platform/haswell/include/platform/lib/memory.h

@@ -29,6 +29,15 @@ static inline void *platform_shared_get(void *ptr, int bytes)
 	return ptr;
 }
 
+/**
+ * \brief Function for keeping shared data synchronized.
+ * It's used after usage of data shared by different cores.
+ * Such data is either statically marked with SHARED_DATA
+ * or dynamically allocated with SOF_MEM_FLAG_SHARED flag.
+ * Does nothing, since HSW doesn't support SMP.
+ */
+static inline void platform_shared_commit(void *ptr, int bytes) { }
+
 static inline void *platform_rfree_prepare(void *ptr)
 {
 	return ptr;

src/platform/imx8/include/platform/lib/memory.h

@@ -188,6 +188,15 @@ static inline void *platform_shared_get(void *ptr, int bytes)
 	return ptr;
 }
 
+/**
+ * \brief Function for keeping shared data synchronized.
+ * It's used after usage of data shared by different cores.
+ * Such data is either statically marked with SHARED_DATA
+ * or dynamically allocated with SOF_MEM_FLAG_SHARED flag.
+ * Does nothing, since IMX doesn't support SMP.
+ */
+static inline void platform_shared_commit(void *ptr, int bytes) { }
+
 static inline void *platform_rfree_prepare(void *ptr)
 {
 	return ptr;

src/platform/intel/cavs/include/cavs/lib/memory.h

@@ -111,6 +111,17 @@ static inline void *platform_shared_get(void *ptr, int bytes)
 #endif
 }
 
+/**
+ * \brief Function for keeping shared data synchronized.
+ * It's used after usage of data shared by different cores.
+ * Such data is either statically marked with SHARED_DATA
+ * or dynamically allocated with SOF_MEM_FLAG_SHARED flag.
+ * cAVS platforms use uncached memory region, so no additional
+ * synchronization is needed, but for SMP platforms without uncache
+ * this macro should writeback and invalidate data.
+ */
+static inline void platform_shared_commit(void *ptr, int bytes) { }
+
 /**
  * \brief Transforms pointer if necessary before freeing the memory.
  * \param[in,out] ptr Pointer to the allocated memory.

src/platform/library/include/platform/lib/memory.h

@@ -34,6 +34,8 @@ static inline void *platform_shared_get(void *ptr, int bytes)
 	return ptr;
 }
 
+static inline void platform_shared_commit(void *ptr, int bytes) { }
+
 #endif /* __PLATFORM_LIB_MEMORY_H__ */
 
 #else