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-rw-r--r--flashstub/lmi.c49
1 files changed, 49 insertions, 0 deletions
diff --git a/flashstub/lmi.c b/flashstub/lmi.c
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index 0000000..27f8875
--- /dev/null
+++ b/flashstub/lmi.c
@@ -0,0 +1,49 @@
+/*
+ * This file is part of the Black Magic Debug project.
+ *
+ * Copyright (C) 2015 Black Sphere Technologies Ltd.
+ * Written by Gareth McMullin <gareth@blacksphere.co.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/>.
+ */
+#include <stdint.h>
+#include "stub.h"
+
+#define LMI_FLASH_BASE ((volatile uint32_t *)0x400FD000)
+#define LMI_FLASH_FMA LMI_FLASH_BASE[0]
+#define LMI_FLASH_FMD LMI_FLASH_BASE[1]
+#define LMI_FLASH_FMC LMI_FLASH_BASE[2]
+
+#define LMI_FLASH_FMC_WRITE (1 << 0)
+#define LMI_FLASH_FMC_ERASE (1 << 1)
+#define LMI_FLASH_FMC_MERASE (1 << 2)
+#define LMI_FLASH_FMC_COMT (1 << 3)
+#define LMI_FLASH_FMC_WRKEY 0xA4420000
+
+void __attribute__((naked))
+stm32f1_flash_write_stub(uint32_t *dest, uint32_t *src, uint32_t size)
+{
+ size /= 4;
+ for (int i; i < size; i++) {
+ LMI_FLASH_FMA = (uint32_t)&dest[i];
+ LMI_FLASH_FMD = src[i];
+ LMI_FLASH_FMC = LMI_FLASH_FMC_WRKEY | LMI_FLASH_FMC_WRITE;
+ while (LMI_FLASH_FMC & LMI_FLASH_FMC_WRITE)
+ ;
+ }
+
+ stub_exit(0);
+}
+
+