diff options
Diffstat (limited to 'contrib/loaders/flash/stellaris.s')
| -rw-r--r-- | contrib/loaders/flash/stellaris.s | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/contrib/loaders/flash/stellaris.s b/contrib/loaders/flash/stellaris.s new file mode 100644 index 00000000..166dd52a --- /dev/null +++ b/contrib/loaders/flash/stellaris.s @@ -0,0 +1,66 @@ +/*************************************************************************** + * Copyright (C) 2006 by Magnus Lundin * + * lundin@mlu.mine.nu * + * * + * Copyright (C) 2008 by Spencer Oliver * + * spen@spen-soft.co.uk * + * * + * 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., * + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * + ***************************************************************************/ + + .text + .syntax unified + .cpu cortex-m3 + .thumb + .thumb_func + .align 2 + +/* + Call with : + r0 = buffer address + r1 = destination address + r2 = bytecount (in) - endaddr (work) + + Used registers: + r3 = pFLASH_CTRL_BASE + r4 = FLASHWRITECMD + r5 = #1 + r6 = bytes written + r7 = temp reg +*/ + +write: + ldr r3,pFLASH_CTRL_BASE + ldr r4,FLASHWRITECMD + movs r5, 1 + movs r6, #0 +mainloop: + str r1, [r3, #0] + ldr r7, [r0, r6] + str r7, [r3, #4] + str r4, [r3, #8] +waitloop: + ldr r7, [r3, #8] + tst r7, r5 + bne waitloop + adds r1, r1, #4 + adds r6, r6, #4 + cmp r6, r2 + bne mainloop + bkpt #0 + +pFLASH_CTRL_BASE: .word 0x400FD000 +FLASHWRITECMD: .word 0xA4420001 |