diff options
Diffstat (limited to 'contrib/loaders/flash/armv4_5_cfi_intel_16.s')
| -rw-r--r-- | contrib/loaders/flash/armv4_5_cfi_intel_16.s | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/contrib/loaders/flash/armv4_5_cfi_intel_16.s b/contrib/loaders/flash/armv4_5_cfi_intel_16.s new file mode 100644 index 00000000..52836006 --- /dev/null +++ b/contrib/loaders/flash/armv4_5_cfi_intel_16.s @@ -0,0 +1,57 @@ +/*************************************************************************** + * Copyright (C) 2005, 2007 by Dominic Rath * + * Dominic.Rath@gmx.de * + * Copyright (C) 2010 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 + .arch armv4 + + .section .init + +/* algorithm register usage: + * r0: source address (in RAM) + * r1: target address (in Flash) + * r2: count + * r3: flash write command + * r4: status byte (returned to host) + * r5: busy test pattern + * r6: error test pattern + */ + +loop: + ldrh r4, [r0], #2 + strh r3, [r1] + strh r4, [r1] +busy: + ldrh r4, [r1] + and r7, r4, r5 + cmp r7, r5 + bne busy + tst r4, r6 + bne done + subs r2, r2, #1 + beq done + add r1, r1, #2 + b loop +done: + b done + + .end |