esp_hw_support: Move cpu protection in port files

components/esp_hw_support/port/esp32s2/cpu_region_protect.c

@@ -0,0 +1,22 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <stdint.h>
+#include "hal/mpu_hal.h"
+
+void esp_cpu_configure_region_protection(void)
+{
+    /* Note: currently this is configured the same on all Xtensa targets
+     *
+     * Both chips have the address space divided into 8 regions, 512MB each.
+     */
+    const int illegal_regions[] = {0, 4, 5, 6, 7}; // 0x00000000, 0x80000000, 0xa0000000, 0xc0000000, 0xe0000000
+    for (size_t i = 0; i < sizeof(illegal_regions) / sizeof(illegal_regions[0]); ++i) {
+        mpu_hal_set_region_access(illegal_regions[i], MPU_REGION_ILLEGAL);
+    }
+
+    mpu_hal_set_region_access(1, MPU_REGION_RW); // 0x20000000
+}