diff options
Diffstat (limited to 'contrib/loaders/flash/str7x.s')
| -rw-r--r-- | contrib/loaders/flash/str7x.s | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/contrib/loaders/flash/str7x.s b/contrib/loaders/flash/str7x.s new file mode 100644 index 00000000..fcdb007d --- /dev/null +++ b/contrib/loaders/flash/str7x.s @@ -0,0 +1,57 @@ +/*************************************************************************** + * Copyright (C) 2010 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 + .arm + .section .init +/* + r0 source address + r1 address + r2 FLASH_CR0 + r3 dword count + r4 result + r5 busy mask +*/ + +write: + mov r4, #0x10000000 /* set DWPG bit */ + str r4, [r2, #0x0] /* FLASH_CR0 */ + str r1, [r2, #0x10] /* FLASH_AR */ + ldr r4, [r0], #4 /* load data */ + str r4, [r2, #0x8] /* FLASH_DR0 */ + ldr r4, [r0], #4 /* load data */ + str r4, [r2, #0xc] /* FLASH_DR1 */ + mov r4, #0x90000000 /* set DWPG and WMS bits */ + str r4, [r2, #0x0] /* FLASH_CR0 */ +busy: + ldr r4, [r2, #0x0] /* FLASH_CR0 */ + tst r4, r5 + bne busy + ldr r4, [r2, #0x14] /* FLASH_ER */ + tst r4, #0xff /* do we have errors */ + tsteq r4, #0x100 /* write protection set */ + bne exit + add r1, r1, #0x8 /* next 8 bytes */ + subs r3, r3, #1 /* decremment dword count */ + bne write +exit: + b exit + + .end |