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diff --git a/include/libopencm3/stm32/flash.h b/include/libopencm3/stm32/flash.h
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+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2010 Thomas Otto <tommi@viadmin.org>
+ * Copyright (C) 2010 Mark Butler <mbutler@physics.otago.ac.nz>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * For details see:
+ * PM0042 Programming manual: STM32F10xxx Flash programming
+ * October 2009, Doc ID 13259 Rev 7
+ * http://www.st.com/stonline/products/literature/pm/13259.pdf
+ */
+
+#ifndef LIBOPENCM3_FLASH_H
+#define LIBOPENCM3_FLASH_H
+
+#include <libopencm3/stm32/memorymap.h>
+#include <libopencm3/cm3/common.h>
+
+/* --- FLASH registers ----------------------------------------------------- */
+
+#define FLASH_ACR MMIO32(FLASH_MEM_INTERFACE_BASE + 0x00)
+#define FLASH_KEYR MMIO32(FLASH_MEM_INTERFACE_BASE + 0x04)
+#define FLASH_OPTKEYR MMIO32(FLASH_MEM_INTERFACE_BASE + 0x08)
+#define FLASH_SR MMIO32(FLASH_MEM_INTERFACE_BASE + 0x0C)
+#define FLASH_CR MMIO32(FLASH_MEM_INTERFACE_BASE + 0x10)
+#define FLASH_AR MMIO32(FLASH_MEM_INTERFACE_BASE + 0x14)
+#define FLASH_OBR MMIO32(FLASH_MEM_INTERFACE_BASE + 0x1C)
+#define FLASH_WRPR MMIO32(FLASH_MEM_INTERFACE_BASE + 0x20)
+
+/* --- FLASH_ACR values ---------------------------------------------------- */
+
+#define FLASH_PRFTBS (1 << 5)
+#define FLASH_PRFTBE (1 << 4)
+#define FLASH_HLFCYA (1 << 3)
+#define FLASH_LATENCY_0WS 0x00
+#define FLASH_LATENCY_1WS 0x01
+#define FLASH_LATENCY_2WS 0x02
+
+/* --- FLASH_SR values ----------------------------------------------------- */
+
+#define FLASH_EOP (1 << 5)
+#define FLASH_WRPRTERR (1 << 4)
+#define FLASH_PGERR (1 << 2)
+#define FLASH_BSY (1 << 0)
+
+/* --- FLASH_CR values ----------------------------------------------------- */
+
+#define FLASH_EOPIE (1 << 12)
+#define FLASH_ERRIE (1 << 10)
+#define FLASH_OPTWRE (1 << 9)
+#define FLASH_LOCK (1 << 7)
+#define FLASH_STRT (1 << 6)
+#define FLASH_OPTER (1 << 5)
+#define FLASH_OPTPG (1 << 4)
+#define FLASH_MER (1 << 2)
+#define FLASH_PER (1 << 1)
+#define FLASH_PG (1 << 0)
+
+/* --- FLASH_OBR values ---------------------------------------------------- */
+
+/* FLASH_OBR[25:18]: Data1 */
+/* FLASH_OBR[17:10]: Data0 */
+#define FLASH_NRST_STDBY (1 << 4)
+#define FLASH_NRST_STOP (1 << 3)
+#define FLASH_WDG_SW (1 << 2)
+#define FLASH_RDPRT (1 << 1)
+#define FLASH_OPTERR (1 << 0)
+
+/* --- FLASH Keys -----------------------------------------------------------*/
+
+#define RDP_KEY ((u16)0x00a5)
+#define FLASH_KEY1 ((u32)0x45670123)
+#define FLASH_KEY2 ((u32)0xcdef89ab)
+
+/* --- Function prototypes ------------------------------------------------- */
+
+void flash_prefetch_buffer_enable(void);
+void flash_prefetch_buffer_disable(void);
+void flash_halfcycle_enable(void);
+void flash_halfcycle_disable(void);
+void flash_set_ws(u32 ws);
+void flash_unlock(void);
+void flash_lock(void);
+void flash_clear_pgerr_flag(void);
+void flash_clear_eop_flag(void);
+void flash_clear_wrprterr_flag(void);
+void flash_clear_bsy_flag(void);
+void flash_clear_status_flags(void);
+void flash_unlock_option_bytes(void);
+void flash_erase_all_pages(void);
+void flash_erase_page(u32 page_address);
+void flash_program_word(u32 address, u32 data);
+void flash_program_half_word(u32 address, u16 data);
+void flash_wait_for_last_operation(void);
+void flash_erase_option_bytes(void);
+void flash_program_option_bytes(u32 address, u16 data);
+
+#endif