diff options
Diffstat (limited to 'os/hal')
| -rw-r--r-- | os/hal/ports/STM32/STM32H7xx/hal_lld.c | 36 | ||||
| -rw-r--r-- | os/hal/ports/STM32/STM32H7xx/hal_lld.h | 16 |
2 files changed, 51 insertions, 1 deletions
diff --git a/os/hal/ports/STM32/STM32H7xx/hal_lld.c b/os/hal/ports/STM32/STM32H7xx/hal_lld.c index 1a8bf7fbb..7e7b0c3b1 100644 --- a/os/hal/ports/STM32/STM32H7xx/hal_lld.c +++ b/os/hal/ports/STM32/STM32H7xx/hal_lld.c @@ -150,10 +150,44 @@ void hal_lld_init(void) { /* IRQ subsystem initialization.*/
irqInit();
+
+ /* MPU initialization.*/
+#if (STM32_NOCACHE_SRAM1_SRAM2 == TRUE) || (STM32_NOCACHE_SRAM3 == TRUE)
+ {
+ uint32_t base, size;
+
+#if (STM32_NOCACHE_SRAM1_SRAM2 == TRUE) && (STM32_NOCACHE_SRAM3 == TRUE)
+ base = 0x30000000U;
+ size = MPU_RASR_SIZE_512K;
+#elif (STM32_NOCACHE_SRAM1_SRAM2 == TRUE) && (STM32_NOCACHE_SRAM3 == FALSE)
+ base = 0x30000000U;
+ size = MPU_RASR_SIZE_256K;
+#elif (STM32_NOCACHE_SRAM1_SRAM2 == FALSE) && (STM32_NOCACHE_SRAM3 == TRUE)
+ base = 0x30040000U;
+ size = MPU_RASR_SIZE_16K;
+#else
+#error "invalid constants used in mcuconf.h"
+#endif
+
+ /* The SRAM2 bank can optionally made a non cache-able area for use by
+ DMA engines.*/
+ mpuConfigureRegion(MPU_REGION_7,
+ base,
+ MPU_RASR_ATTR_AP_RW_RW |
+ MPU_RASR_ATTR_NON_CACHEABLE |
+ size |
+ MPU_RASR_ENABLE);
+ mpuEnable(MPU_CTRL_PRIVDEFENA);
+
+ /* Invalidating data cache to make sure that the MPU settings are taken
+ immediately.*/
+ SCB_CleanInvalidateDCache();
+ }
+#endif
}
/**
- * @brief STM32F2xx clocks and PLL initialization.
+ * @brief STM32H7xx clocks and PLL initialization.
* @note All the involved constants come from the file @p board.h.
* @note This function should be invoked just after the system reset.
*
diff --git a/os/hal/ports/STM32/STM32H7xx/hal_lld.h b/os/hal/ports/STM32/STM32H7xx/hal_lld.h index 7217a579f..21a1cb739 100644 --- a/os/hal/ports/STM32/STM32H7xx/hal_lld.h +++ b/os/hal/ports/STM32/STM32H7xx/hal_lld.h @@ -543,6 +543,22 @@ #endif
/**
+ * @brief Add no-cache attribute to SRAM1 and SRAM2.
+ * @note MPU region 7 is used if enabled.
+ */
+#if !defined(STM32_NOCACHE_SRAM1_SRAM2) || defined(__DOXYGEN__)
+#define STM32_NOCACHE_SRAM1_SRAM2 FALSE
+#endif
+
+/**
+ * @brief Add no-cache attribute to SRAM3.
+ * @note MPU region 7 is used if enabled.
+ */
+#if !defined(STM32_NOCACHE_SRAM3) || defined(__DOXYGEN__)
+#define STM32_NOCACHE_SRAM3 TRUE
+#endif
+
+/**
* @brief PWR CR1 initializer.
*/
#if !defined(STM32_PWR_CR1) || defined(__DOXYGEN__)
|