diff --git a/src/platform/baytrail/include/platform/lib/memory.h b/src/platform/baytrail/include/platform/lib/memory.h
index 2020a1bbd..aaeb9c4e7 100644
--- a/src/platform/baytrail/include/platform/lib/memory.h
+++ b/src/platform/baytrail/include/platform/lib/memory.h
@@ -193,10 +193,6 @@ static inline void *platform_rfree_prepare(void *ptr)
 
 #define SOF_MEM_RO_SIZE			0x8
 
-#define uncache_to_cache(address)	address
-#define cache_to_uncache(address)	address
-#define is_uncached(address)		0
-
 #endif /* __PLATFORM_LIB_MEMORY_H__ */
 
 #else
diff --git a/src/platform/haswell/include/platform/lib/memory.h b/src/platform/haswell/include/platform/lib/memory.h
index a4031821a..e401b0dbc 100644
--- a/src/platform/haswell/include/platform/lib/memory.h
+++ b/src/platform/haswell/include/platform/lib/memory.h
@@ -187,10 +187,6 @@ static inline void *platform_rfree_prepare(void *ptr)
 
 #define SOF_MEM_RO_SIZE		0x8
 
-#define uncache_to_cache(address)	address
-#define cache_to_uncache(address)	address
-#define is_uncached(address)		0
-
 #endif /* __PLATFORM_LIB_MEMORY_H__ */
 
 #else
diff --git a/src/platform/imx8/include/platform/lib/memory.h b/src/platform/imx8/include/platform/lib/memory.h
index ccd88a53a..ea72b4ffc 100644
--- a/src/platform/imx8/include/platform/lib/memory.h
+++ b/src/platform/imx8/include/platform/lib/memory.h
@@ -165,10 +165,6 @@
 
 #define SOF_MEM_RO_SIZE			0x8
 
-#define uncache_to_cache(address)	address
-#define cache_to_uncache(address)	address
-#define is_uncached(address)		0
-
 #define HEAP_BUF_ALIGNMENT		PLATFORM_DCACHE_ALIGN
 
 #if !defined(__ASSEMBLER__) && !defined(LINKER)
diff --git a/src/platform/imx8m/include/platform/lib/memory.h b/src/platform/imx8m/include/platform/lib/memory.h
index c2f3540ac..ab1be9781 100644
--- a/src/platform/imx8m/include/platform/lib/memory.h
+++ b/src/platform/imx8m/include/platform/lib/memory.h
@@ -162,10 +162,6 @@
 
 #define SOF_MEM_RO_SIZE			0x8
 
-#define uncache_to_cache(address)	address
-#define cache_to_uncache(address)	address
-#define is_uncached(address)		0
-
 #define HEAP_BUF_ALIGNMENT		PLATFORM_DCACHE_ALIGN
 
 #if !defined(__ASSEMBLER__) && !defined(LINKER)
diff --git a/src/platform/library/include/platform/lib/memory.h b/src/platform/library/include/platform/lib/memory.h
index fa928bd06..fb8fd6a59 100644
--- a/src/platform/library/include/platform/lib/memory.h
+++ b/src/platform/library/include/platform/lib/memory.h
@@ -29,10 +29,6 @@
 
 #define SHARED_DATA
 
-#define uncache_to_cache(address)	(address)
-#define cache_to_uncache(address)	(address)
-#define is_uncached(address)		0
-
 static inline void *platform_shared_get(void *ptr, int bytes)
 {
 	return ptr;