diff --git a/sim/mcuboot-sys/csupport/flash_map.h b/sim/mcuboot-sys/csupport/flash_map.h
new file mode 100644
index 0000000..506f266
--- /dev/null
+++ b/sim/mcuboot-sys/csupport/flash_map.h
@@ -0,0 +1,148 @@
+/*
+ * 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.
+ */
+
+#ifndef H_UTIL_FLASH_MAP_
+#define H_UTIL_FLASH_MAP_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ *
+ * Provides abstraction of flash regions for type of use.
+ * I.e. dude where's my image?
+ *
+ * System will contain a map which contains flash areas. Every
+ * region will contain flash identifier, offset within flash and length.
+ *
+ * 1. This system map could be in a file within filesystem (Initializer
+ * must know/figure out where the filesystem is at).
+ * 2. Map could be at fixed location for project (compiled to code)
+ * 3. Map could be at specific place in flash (put in place at mfg time).
+ *
+ * Note that the map you use must be valid for BSP it's for,
+ * match the linker scripts when platform executes from flash,
+ * and match the target offset specified in download script.
+ */
+#include <inttypes.h>
+
+/**
+ * @brief Structure describing an area on a flash device.
+ *
+ * Multiple flash devices may be available in the system, each of
+ * which may have its own areas. For this reason, flash areas track
+ * which flash device they are part of.
+ */
+struct flash_area {
+    /**
+     * This flash area's ID; unique in the system.
+     */
+    uint8_t fa_id;
+
+    /**
+     * ID of the flash device this area is a part of.
+     */
+    uint8_t fa_device_id;
+
+    uint16_t pad16;
+
+    /**
+     * This area's offset, relative to the beginning of its flash
+     * device's storage.
+     */
+    uint32_t fa_off;
+
+    /**
+     * This area's size, in bytes.
+     */
+    uint32_t fa_size;
+};
+
+/**
+ * @brief Structure describing a sector within a flash area.
+ *
+ * Each sector has an offset relative to the start of its flash area
+ * (NOT relative to the start of its flash device), and a size. A
+ * flash area may contain sectors with different sizes.
+ */
+struct flash_sector {
+    /**
+     * Offset of this sector, from the start of its flash area (not device).
+     */
+    uint32_t fs_off;
+
+    /**
+     * Size of this sector, in bytes.
+     */
+    uint32_t fs_size;
+};
+
+/*
+ * Retrieve a memory-mapped flash device's base address.
+ *
+ * On success, the address will be stored in the value pointed to by
+ * ret.
+ *
+ * Returns 0 on success, or an error code on failure.
+ */
+int flash_device_base(uint8_t fd_id, uintptr_t *ret);
+
+/*
+ * Start using flash area.
+ */
+int flash_area_open(uint8_t id, const struct flash_area **);
+
+void flash_area_close(const struct flash_area *);
+
+/*
+ * Read/write/erase. Offset is relative from beginning of flash area.
+ */
+int flash_area_read(const struct flash_area *, uint32_t off, void *dst,
+  uint32_t len);
+int flash_area_write(const struct flash_area *, uint32_t off, const void *src,
+  uint32_t len);
+int flash_area_erase(const struct flash_area *, uint32_t off, uint32_t len);
+
+/*
+ * Alignment restriction for flash writes.
+ */
+uint8_t flash_area_align(const struct flash_area *);
+
+/*
+ * Given flash area ID, return info about sectors within the area.
+ */
+int flash_area_get_sectors(int fa_id, uint32_t *count,
+  struct flash_sector *sectors);
+
+/*
+ * Similar to flash_area_get_sectors(), but return the values in an
+ * array of struct flash_area instead.
+ */
+__attribute__((deprecated))
+int flash_area_to_sectors(int idx, int *cnt, struct flash_area *ret);
+
+int flash_area_id_from_image_slot(int slot);
+int flash_area_id_to_image_slot(int area_id);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* H_UTIL_FLASH_MAP_ */
diff --git a/sim/mcuboot-sys/csupport/run.c b/sim/mcuboot-sys/csupport/run.c
index 9b5e36e..2882daf 100644
--- a/sim/mcuboot-sys/csupport/run.c
+++ b/sim/mcuboot-sys/csupport/run.c
@@ -7,7 +7,8 @@
 #include <string.h>
 #include <bootutil/bootutil.h>
 #include <bootutil/image.h>
-#include "flash_map/flash_map.h"
+
+#include <flash_map_backend/flash_map_backend.h>
 
 #include "../../../boot/bootutil/src/bootutil_priv.h"
 #include "bootsim.h"