git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@8212 35acf78f-673a-0410-8e92-d51de3d6d3f4

1 files changed, 12 insertions, 6 deletions

diff --git a/os/hal/ports/STM32/LLD/DMAv2/stm32_dma.h b/os/hal/ports/STM32/LLD/DMAv2/stm32_dma.h
index e20ebe637..ab46ecf43 100644
--- a/os/hal/ports/STM32/LLD/DMAv2/stm32_dma.h
+++ b/os/hal/ports/STM32/LLD/DMAv2/stm32_dma.h
@@ -241,15 +241,21 @@ typedef void (*stm32_dmaisr_t)(void *p, uint32_t flags);
  * @note    On devices without data cache this function does nothing.

  * @note    The function takes care of cache lines alignment.

  *

- * @param[in] addr      address of the DMA buffer

- * @param[in] size      size of the DMA buffer

+ * @param[in] saddr     start address of the DMA buffer, inclusive

+ * @param[in] eaddr     end address of the DMA buffer, not inclusive

  *

  * @api

  */

-#define dmaBufferInvalidate(addr, size) {                                   \

-  uint32_t *aaddr = (uint32_t *)(((uint32_t)(addr)) & ~0x1FU);              \

-  uint32_t asize  = (uint32_t)((((size) - 1) | 0x1FU) + 1U);                \

-  SCB_CleanInvalidateDCache_by_Addr(aaddr, asize);                          \

+#define dmaBufferInvalidate(saddr, eaddr) {                                 \

+  uint8_t *start = (uint8_t *)(((uint32_t)(saddr)) & ~0x1FU);               \

+  uint8_t *end = (uint8_t *)(((((uint32_t)(eaddr)) - 1U) | 0x1FU) + 1U);    \

+  __DSB();                                                                  \

+  while (start < end) {                                                     \

+    SCB->DCCIMVAC = (uint32_t)start;                                        \

+    start += 32U;                                                           \

+  }                                                                         \

+  __DSB();                                                                  \

+  __ISB();                                                                  \

 }

 #else

 #define dmaBufferInvalidate(addr, size) {                                   \