Initial commit

Initial commit.

bootloader/mcuboot/boot/zephyr/arm_cleanup.c

@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2020 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/toolchain.h>
+
+#include <cmsis_core.h>
+#if CONFIG_CPU_HAS_NXP_MPU
+#include <fsl_sysmpu.h>
+#endif
+
+void cleanup_arm_nvic(void) {
+	/* Allow any pending interrupts to be recognized */
+	__ISB();
+	__disable_irq();
+
+	/* Disable NVIC interrupts */
+	for (uint8_t i = 0; i < ARRAY_SIZE(NVIC->ICER); i++) {
+		NVIC->ICER[i] = 0xFFFFFFFF;
+	}
+	/* Clear pending NVIC interrupts */
+	for (uint8_t i = 0; i < ARRAY_SIZE(NVIC->ICPR); i++) {
+		NVIC->ICPR[i] = 0xFFFFFFFF;
+	}
+}
+
+#if CONFIG_CPU_HAS_ARM_MPU
+__weak void z_arm_clear_arm_mpu_config(void)
+{
+	int i;
+
+	int num_regions =
+		((MPU->TYPE & MPU_TYPE_DREGION_Msk) >> MPU_TYPE_DREGION_Pos);
+
+	for (i = 0; i < num_regions; i++) {
+		ARM_MPU_ClrRegion(i);
+	}
+}
+#elif CONFIG_CPU_HAS_NXP_MPU
+__weak void z_arm_clear_arm_mpu_config(void)
+{
+	int i;
+
+	int num_regions = FSL_FEATURE_SYSMPU_DESCRIPTOR_COUNT;
+
+	SYSMPU_Enable(SYSMPU, false);
+
+	/* NXP MPU region 0 is reserved for the debugger */
+	for (i = 1; i < num_regions; i++) {
+		SYSMPU_RegionEnable(SYSMPU, i, false);
+	}
+}
+#endif