diff --git a/src/common/tusb_common.h b/src/common/tusb_common.h
index 957491aa9..bae583c06 100644
--- a/src/common/tusb_common.h
+++ b/src/common/tusb_common.h
@@ -99,10 +99,9 @@ TU_ATTR_WEAK extern void* tusb_app_phys_to_virt(void *phys_addr);
 #define tu_varclr(_var)          tu_memclr(_var, sizeof(*(_var)))
 
 // This is a backport of memset_s from c11
-TU_ATTR_ALWAYS_INLINE static inline int tu_memset_s(void *dest, size_t destsz, int ch, size_t count)
-{
+TU_ATTR_ALWAYS_INLINE static inline int tu_memset_s(void *dest, size_t destsz, int ch, size_t count) {
   // TODO may check if desst and src is not NULL
-  if (count > destsz) {
+  if ( count > destsz ) {
     return -1;
   }
   memset(dest, ch, count);
@@ -110,10 +109,9 @@ TU_ATTR_ALWAYS_INLINE static inline int tu_memset_s(void *dest, size_t destsz, i
 }
 
 // This is a backport of memcpy_s from c11
-TU_ATTR_ALWAYS_INLINE static inline int tu_memcpy_s(void *dest, size_t destsz, const void * src, size_t count )
-{
+TU_ATTR_ALWAYS_INLINE static inline int tu_memcpy_s(void *dest, size_t destsz, const void *src, size_t count) {
   // TODO may check if desst and src is not NULL
-  if (count > destsz) {
+  if ( count > destsz ) {
     return -1;
   }
   memcpy(dest, src, count);
@@ -169,6 +167,9 @@ TU_ATTR_ALWAYS_INLINE static inline uint32_t tu_align32 (uint32_t value) { retur
 TU_ATTR_ALWAYS_INLINE static inline uint32_t tu_align4k (uint32_t value) { return (value & 0xFFFFF000UL); }
 TU_ATTR_ALWAYS_INLINE static inline uint32_t tu_offset4k(uint32_t value) { return (value & 0xFFFUL); }
 
+TU_ATTR_ALWAYS_INLINE static inline bool tu_is_aligned32(uint32_t value) { return (value & 0x1FUL) == 0; }
+TU_ATTR_ALWAYS_INLINE static inline bool tu_is_aligned64(uint64_t value) { return (value & 0x3FUL) == 0; }
+
 //------------- Mathematics -------------//
 TU_ATTR_ALWAYS_INLINE static inline uint32_t tu_div_ceil(uint32_t v, uint32_t d) { return (v + d -1)/d; }
 
diff --git a/src/host/hcd.h b/src/host/hcd.h
index 3355c18b2..52fcc834e 100644
--- a/src/host/hcd.h
+++ b/src/host/hcd.h
@@ -104,21 +104,21 @@ typedef struct
   uint8_t speed;
 } hcd_devtree_info_t;
 
-//--------------------------------------------------------------------+
+//--------------------------------------------------------------
 // Memory API
 //--------------------------------------------------------------------+
 
 // clean/flush data cache: write cache -> memory.
 // Required before an DMA TX transfer to make sure data is in memory
-void hcd_dcache_clean(void const* addr, uint32_t data_size) TU_ATTR_WEAK;
+bool hcd_dcache_clean(void const* addr, uint32_t data_size) TU_ATTR_WEAK;
 
 // invalidate data cache: mark cache as invalid, next read will read from memory
 // Required BOTH before and after an DMA RX transfer
-void hcd_dcache_invalidate(void const* addr, uint32_t data_size) TU_ATTR_WEAK;
+bool hcd_dcache_invalidate(void const* addr, uint32_t data_size) TU_ATTR_WEAK;
 
 // clean and invalidate data cache
 // Required before an DMA transfer where memory is both read/write by DMA
-void hcd_dcache_clean_invalidate(void const* addr, uint32_t data_size) TU_ATTR_WEAK;
+bool hcd_dcache_clean_invalidate(void const* addr, uint32_t data_size) TU_ATTR_WEAK;
 
 //--------------------------------------------------------------------+
 // Controller API
diff --git a/src/portable/chipidea/ci_hs/ci_hs_imxrt.h b/src/portable/chipidea/ci_hs/ci_hs_imxrt.h
index 96f0ba766..c59c107ff 100644
--- a/src/portable/chipidea/ci_hs/ci_hs_imxrt.h
+++ b/src/portable/chipidea/ci_hs/ci_hs_imxrt.h
@@ -68,31 +68,34 @@ TU_ATTR_ALWAYS_INLINE static inline bool imxrt_is_cache_mem(uintptr_t addr) {
   return !(0x20000000 <= addr && addr < 0x20100000);
 }
 
-TU_ATTR_ALWAYS_INLINE static inline void imxrt_dcache_clean(void const* addr, uint32_t data_size) {
+TU_ATTR_ALWAYS_INLINE static inline bool imxrt_dcache_clean(void const* addr, uint32_t data_size) {
   const uintptr_t addr32 = (uintptr_t) addr;
   if (imxrt_is_cache_mem(addr32)) {
+    TU_ASSERT(tu_is_aligned32(addr32));
     SCB_CleanDCache_by_Addr((uint32_t *) addr32, (int32_t) data_size);
   }
+  return true;
 }
 
-TU_ATTR_ALWAYS_INLINE static inline void imxrt_dcache_invalidate(void const* addr, uint32_t data_size) {
+TU_ATTR_ALWAYS_INLINE static inline bool imxrt_dcache_invalidate(void const* addr, uint32_t data_size) {
   const uintptr_t addr32 = (uintptr_t) addr;
   if (imxrt_is_cache_mem(addr32)) {
     // Invalidating does not push cached changes back to RAM so we need to be
     // *very* careful when we do it. If we're not aligned, then we risk resetting
     // values back to their RAM state.
-    // if (addr32 % 32 != 0) {
-    //   TU_BREAKPOINT();
-    // }
+    TU_ASSERT(tu_is_aligned32(addr32));
     SCB_InvalidateDCache_by_Addr((void*) addr32, (int32_t) data_size);
   }
+  return true;
 }
 
-TU_ATTR_ALWAYS_INLINE static inline void imxrt_dcache_clean_invalidate(void const* addr, uint32_t data_size) {
+TU_ATTR_ALWAYS_INLINE static inline bool imxrt_dcache_clean_invalidate(void const* addr, uint32_t data_size) {
   const uintptr_t addr32 = (uintptr_t) addr;
   if (imxrt_is_cache_mem(addr32)) {
+    TU_ASSERT(tu_is_aligned32(addr32));
     SCB_CleanInvalidateDCache_by_Addr((uint32_t *) addr32, (int32_t) data_size);
   }
+  return true;
 }
 
 #endif
diff --git a/src/portable/chipidea/ci_hs/hcd_ci_hs.c b/src/portable/chipidea/ci_hs/hcd_ci_hs.c
index 56167b8f6..6ee91e18e 100644
--- a/src/portable/chipidea/ci_hs/hcd_ci_hs.c
+++ b/src/portable/chipidea/ci_hs/hcd_ci_hs.c
@@ -41,16 +41,16 @@
 #if CFG_TUSB_MCU == OPT_MCU_MIMXRT1XXX
   #include "ci_hs_imxrt.h"
 
-  void hcd_dcache_clean(void const* addr, uint32_t data_size) {
-    imxrt_dcache_clean(addr, data_size);
+  bool hcd_dcache_clean(void const* addr, uint32_t data_size) {
+    return imxrt_dcache_clean(addr, data_size);
   }
 
-  void hcd_dcache_invalidate(void const* addr, uint32_t data_size) {
-    imxrt_dcache_invalidate(addr, data_size);
+  bool hcd_dcache_invalidate(void const* addr, uint32_t data_size) {
+    return imxrt_dcache_invalidate(addr, data_size);
   }
 
-  void hcd_dcache_clean_invalidate(void const* addr, uint32_t data_size) {
-    imxrt_dcache_clean_invalidate(addr, data_size);
+  bool hcd_dcache_clean_invalidate(void const* addr, uint32_t data_size) {
+    return imxrt_dcache_clean_invalidate(addr, data_size);
   }
 
 #elif TU_CHECK_MCU(OPT_MCU_LPC18XX, OPT_MCU_LPC43XX)
diff --git a/src/portable/ehci/ehci.c b/src/portable/ehci/ehci.c
index 38711e382..6dfaab2a2 100644
--- a/src/portable/ehci/ehci.c
+++ b/src/portable/ehci/ehci.c
@@ -162,16 +162,19 @@ static void qtd_init (ehci_qtd_t* qtd, void const* buffer, uint16_t total_bytes)
 static inline void list_insert (ehci_link_t *current, ehci_link_t *new, uint8_t new_type);
 static inline ehci_link_t* list_next (ehci_link_t const *p_link);
 
-TU_ATTR_WEAK void hcd_dcache_clean(void const* addr, uint32_t data_size) {
+TU_ATTR_WEAK bool hcd_dcache_clean(void const* addr, uint32_t data_size) {
   (void) addr; (void) data_size;
+  return true;
 }
 
-TU_ATTR_WEAK void hcd_dcache_invalidate(void const* addr, uint32_t data_size) {
+TU_ATTR_WEAK bool hcd_dcache_invalidate(void const* addr, uint32_t data_size) {
   (void) addr; (void) data_size;
+  return true;
 }
 
-TU_ATTR_WEAK void hcd_dcache_clean_invalidate(void const* addr, uint32_t data_size) {
+TU_ATTR_WEAK bool hcd_dcache_clean_invalidate(void const* addr, uint32_t data_size) {
   (void) addr; (void) data_size;
+  return true;
 }
 
 //--------------------------------------------------------------------+