diff --git a/bootloader.h b/bootloader.h
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--- /dev/null
+++ b/bootloader.h
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+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#ifndef _RECOVERY_BOOTLOADER_H
+#define _RECOVERY_BOOTLOADER_H
+
+/* Bootloader Message
+ *
+ * This structure describes the content of a block in flash
+ * that is used for recovery and the bootloader to talk to
+ * each other.
+ *
+ * The command field is updated by linux when it wants to
+ * reboot into recovery or to update radio or bootloader firmware.
+ * It is also updated by the bootloader when firmware update
+ * is complete (to boot into recovery for any final cleanup)
+ *
+ * The status field is written by the bootloader after the
+ * completion of an "update-radio" or "update-hboot" command.
+ *
+ * The recovery field is only written by linux and used
+ * for the system to send a message to recovery or the
+ * other way around.
+ */
+struct bootloader_message {
+    char command[32];
+    char status[32];
+    char recovery[1024];
+};
+
+/* Read and write the bootloader command from the "misc" partition.
+ * These return zero on success.
+ */
+int get_bootloader_message(struct bootloader_message *out);
+int set_bootloader_message(const struct bootloader_message *in);
+
+/* Write an update to the cache partition for update-radio or update-hboot.
+ * Note, this destroys any filesystem on the cache partition!
+ * The expected bitmap format is 240x320, 16bpp (2Bpp), RGB 5:6:5.
+ */
+int write_update_for_bootloader(
+        const char *update, int update_len,
+        int bitmap_width, int bitmap_height, int bitmap_bpp,
+        const char *busy_bitmap, const char *error_bitmap);
+
+#endif