Import of the watch repository from Pebble

platform/robert/boot/src/flash_region_def_helper.h

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * 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.
+ */
+
+enum {
+#define FLASH_REGION_LIST(name, size, arg) FlashRegion_##name,
+  FLASH_REGION_DEF(FLASH_REGION_LIST, NULL)
+  FlashRegion__COUNT
+};
+
+#define FLASH_REGION_ADDR_HELPER(name, size, tgt) \
+    + (FlashRegion_##name < (tgt) ? (size) : 0)
+
+// These macros add up all the sizes of the flash regions that come before (and including in the
+// case of the _END_ADDR macro) the specified one to determine the proper flash address value.
+#define FLASH_REGION_START_ADDR(region) \
+  ((0) FLASH_REGION_DEF(FLASH_REGION_ADDR_HELPER, FlashRegion_##region))
+#define FLASH_REGION_END_ADDR(region) \
+  ((0) FLASH_REGION_DEF(FLASH_REGION_ADDR_HELPER, FlashRegion_##region + 1))
+
+// Checks that all regions are a multiple of the specified size (usually sector or subsector size)
+#define FLASH_REGION_SIZE_CHECK_HELPER(name, size, arg) \
+  && ((size) % (arg) == 0)
+#define FLASH_REGION_SIZE_CHECK(size) \
+  _Static_assert((1) FLASH_REGION_DEF(FLASH_REGION_SIZE_CHECK_HELPER, size), "Invalid region size");