diff options
Diffstat (limited to 'os/hal/ports/STM32/LLD/DMAv2/stm32_dma.h')
| -rw-r--r-- | os/hal/ports/STM32/LLD/DMAv2/stm32_dma.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/os/hal/ports/STM32/LLD/DMAv2/stm32_dma.h b/os/hal/ports/STM32/LLD/DMAv2/stm32_dma.h index 2c05ba470..e20ebe637 100644 --- a/os/hal/ports/STM32/LLD/DMAv2/stm32_dma.h +++ b/os/hal/ports/STM32/LLD/DMAv2/stm32_dma.h @@ -235,6 +235,29 @@ typedef void (*stm32_dmaisr_t)(void *p, uint32_t flags); /* Driver macros. */
/*===========================================================================*/
+#if defined(STM32F7XX) || defined(__DOXYGEN__)
+/**
+ * @brief Invalidates the data cache lines overlapping a DMA buffer.
+ * @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
+ *
+ * @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); \
+}
+#else
+#define dmaBufferInvalidate(addr, size) { \
+ (void)(addr); \
+ (void)(size); \
+}
+#endif
+
/**
* @name Macro Functions
* @{
|