Initial commit

Initial commit.
2026-03-23 14:40:39 -05:00
parent e84b2b4166
commit 4e2a5258a5
872 changed files with 165227 additions and 0 deletions
--- a/bootloader/mcuboot/boot/zephyr/flash_map_legacy.c
+++ b/bootloader/mcuboot/boot/zephyr/flash_map_legacy.c
@@ -0,0 +1,104 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.
+ */
+
+/**
+ * @file
+ * @brief Legacy flash fallbacks
+ *
+ * This file contains hacks for flash drivers without page layout
+ * support. They're hacks because they guess a page layout that may be
+ * incorrect, but is likely to "work". Needless to say, such guesswork
+ * is undesirable in trusted bootloader code.
+ *
+ * The behavior is:
+ *
+ * - If FLASH_AREA_IMAGE_SECTOR_SIZE is defined (this was used by
+ *   older Zephyr ports), the image sectors have uniform sector sizes.
+ *   We also assume that's the size of the scratch sectors.
+ *
+ * - Otherwise, we assume that the size of the entire scratch area is
+ *   a least common multiple of all sector sizes, and use that as
+ *   FLASH_AREA_IMAGE_SECTOR_SIZE.
+ */
+
+#include "bootutil/bootutil_log.h"
+
+#include <flash_map_backend/flash_map_backend.h>
+#include <inttypes.h>
+#include <target.h>
+
+#warning "The flash driver lacks page layout support; falling back on hacks."
+
+#if !defined(FLASH_AREA_IMAGE_SECTOR_SIZE)
+#define FLASH_AREA_IMAGE_SECTOR_SIZE FLASH_AREA_IMAGE_SCRATCH_SIZE
+#endif
+
+BOOT_LOG_MODULE_DECLARE(mcuboot);
+
+/*
+ * Lookup the sector map for a given flash area.  This should fill in
+ * `ret` with all of the sectors in the area.  `*cnt` will be set to
+ * the storage at `ret` and should be set to the final number of
+ * sectors in this area.
+ */
+int flash_area_get_sectors(int idx, uint32_t *cnt, struct flash_sector *ret)
+{
+    const struct flash_area *fa;
+    uint32_t max_cnt = *cnt;
+    uint32_t rem_len;
+    int rc = -1;
+
+    if (flash_area_open(idx, &fa))  {
+        goto out;
+    }
+
+    BOOT_LOG_DBG("area %d: offset=0x%x, length=0x%x", idx, fa->fa_off,
+                 fa->fa_size);
+
+    if (*cnt < 1) {
+        goto fa_close_out;
+    }
+
+    rem_len = fa->fa_size;
+    *cnt = 0;
+    while (rem_len > 0 && *cnt < max_cnt) {
+        if (rem_len < FLASH_AREA_IMAGE_SECTOR_SIZE) {
+            BOOT_LOG_ERR("area %d size 0x%x not divisible by sector size 0x%x",
+                         idx, fa->fa_size, FLASH_AREA_IMAGE_SECTOR_SIZE);
+            goto fa_close_out;
+        }
+
+        ret[*cnt].fs_off = FLASH_AREA_IMAGE_SECTOR_SIZE * (*cnt);
+        ret[*cnt].fs_size = FLASH_AREA_IMAGE_SECTOR_SIZE;
+        *cnt = *cnt + 1;
+        rem_len -= FLASH_AREA_IMAGE_SECTOR_SIZE;
+    }
+
+    if (*cnt >= max_cnt) {
+        BOOT_LOG_ERR("flash area %d sector count overflow", idx);
+        goto fa_close_out;
+    }
+
+    rc = 0;
+
+fa_close_out:
+    flash_area_close(fa);
+out:
+    return rc;
+}