Diff: source/daplink/interface/bootloader_update.c

Revision:

0:01f31e923fe2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/source/daplink/interface/bootloader_update.c	Tue Apr 07 12:55:42 2020 +0200
@@ -0,0 +1,109 @@
+/**
+ * @file    bootloader_update.c
+ * @brief   Logic to perform a bootloader update when enabled
+ *
+ * DAPLink Interface Firmware
+ * Copyright (c) 2016-2019, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifdef DRAG_N_DROP_SUPPORT
+#include <stdbool.h>
+#include <string.h>
+#include "flash_manager.h"
+#include "util.h"
+#include "bootloader.h"
+#include "info.h"
+#include "daplink.h"
+#include "crc.h"
+
+// Supress the warning 'null argument provided for parameter marked with attribute "nonnull"'
+// since the vector table is at address 0
+#pragma diag_suppress 2748
+
+#if !defined(DAPLINK_BOOTLOADER_UPDATE)
+    #define DAPLINK_BOOTLOADER_UPDATE       0
+#endif
+
+#if DAPLINK_BOOTLOADER_UPDATE
+    // The bootloader must be built first or this header will not be found
+    #include "bootloader_image.c"
+#else //DAPLINK_BOOTLOADER_UPDATE
+    static const unsigned int image_start = 0;
+    static const unsigned int image_size = 0;
+    static const char image_data[1];
+#endif //DAPLINK_BOOTLOADER_UPDATE
+
+static bool interface_image_valid()
+{
+    uint32_t stored_crc;
+    uint32_t computed_crc;
+    
+    stored_crc = *(uint32_t *)(DAPLINK_ROM_IF_START + DAPLINK_ROM_IF_SIZE - 4);
+    computed_crc = crc32((void *)DAPLINK_ROM_IF_START, DAPLINK_ROM_IF_SIZE - 4);
+    return computed_crc == stored_crc;
+}
+
+void bootloader_check_and_update(void)
+{
+    int same;
+    error_t ret;
+    bool update_present = image_size > 0;
+
+    if (!update_present) {
+        return;
+    }
+
+    if (info_get_bootloader_present() &&
+            (info_get_bootloader_version() > DAPLINK_VERSION)) {
+        // Bootloader is more recent than the one we have so
+        // don't change it
+        return;
+    }
+
+    if (!interface_image_valid()) {
+        // The interface is corrupt so don't attempt
+        // to apply the update
+        util_assert(0);
+        return;
+    }
+
+    same = memcmp((void*)image_start, image_data, image_size) == 0;
+    if (!same) {
+        ret = flash_manager_init(flash_intf_iap_protected);
+        if (ret != ERROR_SUCCESS) {
+            util_assert(0);
+            return;
+        }
+
+        ret = flash_manager_data(image_start, (const uint8_t*)image_data, image_size);
+        if (ret != ERROR_SUCCESS) {
+            flash_manager_uninit();
+            util_assert(0);
+            return;
+        }
+
+        ret = flash_manager_uninit();
+        if (ret != ERROR_SUCCESS) {
+            util_assert(0);
+            return;
+        }
+    }
+}
+#else //DRAG_N_DROP_SUPPORT
+
+void bootloader_check_and_update(void) {}
+
+#endif //DRAG_N_DROP_SUPPORT