flash/nor, contrib/loaders: add stm32 loaders Makefile and generated .inc

[openocd] / contrib / loaders / flash / stm32 / stm32f2x.S

diff --git a/contrib/loaders/flash/stm32/stm32f2x.S b/contrib/loaders/flash/stm32/stm32f2x.S
new file mode 100644 (file)
index 0000000..f6f5b30
--- /dev/null
+++ b/contrib/loaders/flash/stm32/stm32f2x.S
@@ -0,0 +1,85 @@
+/***************************************************************************
+ *   Copyright (C) 2010 by Spencer Oliver                                  *
+ *   spen@spen-soft.co.uk                                                  *
+ *                                                                         *
+ *   Copyright (C) 2011 Øyvind Harboe                                      *
+ *   oyvind.harboe@zylin.com                                               *
+ *                                                                         *
+ *   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 2 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, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.           *
+ ***************************************************************************/
+
+       .text
+       .syntax unified
+       .cpu cortex-m3
+       .thumb
+
+/*
+ * Params :
+ * r0 = workarea start, status (out)
+ * r1 = workarea end
+ * r2 = target address
+ * r3 = count (16bit words)
+ * r4 = flash base
+ *
+ * Clobbered:
+ * r6 - temp
+ * r7 - rp
+ * r8 - wp, tmp
+ */
+
+#define STM32_FLASH_CR_OFFSET  0x10                    /* offset of CR register in FLASH struct */
+#define STM32_FLASH_SR_OFFSET  0x0c                    /* offset of SR register in FLASH struct */
+
+#define STM32_PROG16           0x101                   /* PG | PSIZE_16*/
+
+       .thumb_func
+       .global _start
+_start:
+wait_fifo:
+       ldr     r8, [r0, #0]    /* read wp */
+       cmp     r8, #0                  /* abort if wp == 0 */
+       beq     exit
+       ldr     r7, [r0, #4]    /* read rp */
+       cmp     r7, r8                  /* wait until rp != wp */
+       beq     wait_fifo
+
+       ldr             r6, =STM32_PROG16
+       str             r6, [r4, #STM32_FLASH_CR_OFFSET]
+       ldrh    r6, [r7], #0x02                                         /* read one half-word from src, increment ptr */
+       strh    r6, [r2], #0x02                                         /* write one half-word from src, increment ptr */
+       dsb
+busy:
+       ldr     r6, [r4, #STM32_FLASH_SR_OFFSET]
+       tst     r6, #0x10000                                            /* BSY (bit16) == 1 => operation in progress */
+       bne     busy                                                            /* wait more... */
+       tst             r6, #0xf0                                                       /* PGSERR | PGPERR | PGAERR | WRPERR */
+       bne             error                                                           /* fail... */
+
+       cmp     r7, r1                  /* wrap rp at end of buffer */
+       it      cs
+       addcs   r7, r0, #8              /* skip loader args */
+       str     r7, [r0, #4]    /* store rp */
+       subs    r3, r3, #1              /* decrement halfword count */
+       cbz     r3, exit                /* loop if not done */
+       b               wait_fifo
+error:
+       movs    r1, #0
+       str             r1, [r0, #4]    /* set rp = 0 on error */
+exit:
+       mov             r0, r6                  /* return status in r0 */
+       bkpt    #0x00
+
+       .pool