blob: a6fc68867a8c04d764e3221bc971106f1245d770 [file] [log] [blame]
Wolfgang Denk72a087e2006-10-24 14:27:35 +02001/*
2 * Copyright (C) 2004-2006 Atmel Corporation
3 *
4 * See file CREDITS for list of people who contributed to this
5 * project.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
20 * MA 02111-1307 USA
21 */
22#include <asm/sysreg.h>
23#include <asm/ptrace.h>
24
25 .section .text.exception,"ax"
26 .global _evba
27 .type _evba,@function
28 .align 10
29_evba:
30 .irp x,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16
31 .align 2
32 rjmp unknown_exception
33 .endr
34
35 .global timer_interrupt_handler
36 .type timer_interrupt_handler,@function
37 .align 2
38timer_interrupt_handler:
39 /*
40 * Increment timer_overflow and re-write COMPARE with 0xffffffff.
41 *
42 * We're running at interrupt level 3, so we don't need to save
43 * r8-r12 or lr to the stack.
44 */
Haavard Skinnemoen1f4f2122006-11-20 15:53:10 +010045 lda.w r8, timer_overflow
Wolfgang Denk72a087e2006-10-24 14:27:35 +020046 ld.w r9, r8[0]
47 mov r10, -1
48 mtsr SYSREG_COMPARE, r10
49 sub r9, -1
50 st.w r8[0], r9
51 rete
52
53 .type unknown_exception, @function
54unknown_exception:
55 pushm r0-r12
56 sub r8, sp, REG_R12 - REG_R0 - 4
57 mov r9, lr
58 mfsr r10, SYSREG_RAR_EX
59 mfsr r11, SYSREG_RSR_EX
60 pushm r8-r11
61 mfsr r12, SYSREG_ECR
62 mov r11, sp
63 rcall do_unknown_exception
641: rjmp 1b