[people/ms/u-boot.git] / cpu / at32ap / entry.S

/*
 * Copyright (C) 2004-2006 Atmel Corporation
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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
 */
#include <asm/sysreg.h>
#include <asm/ptrace.h>

	.section .text.exception,"ax"
	.global	_evba
	.type	_evba,@function
	.align	10
_evba:
	.irp	x,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16
	.align	2
	rjmp	unknown_exception
	.endr

	.global	timer_interrupt_handler
	.type	timer_interrupt_handler,@function
	.align	2
timer_interrupt_handler:
	/*
	 * Increment timer_overflow and re-write COMPARE with 0xffffffff.
	 *
	 * We're running at interrupt level 3, so we don't need to save
	 * r8-r12 or lr to the stack.
	 */
	lda.w	r8, timer_overflow
	ld.w	r9, r8[0]
	mov	r10, -1
	mtsr	SYSREG_COMPARE, r10
	sub	r9, -1
	st.w	r8[0], r9
	rete

	.type	unknown_exception, @function
unknown_exception:
	pushm	r0-r12
	sub	r8, sp, REG_R12 - REG_R0 - 4
	mov	r9, lr
	mfsr	r10, SYSREG_RAR_EX
	mfsr	r11, SYSREG_RSR_EX
	pushm	r8-r11
	mfsr	r12, SYSREG_ECR
	mov	r11, sp
	rcall	do_unknown_exception
1:	rjmp	1b
Commit	Line	Data
72a087e0 WD	1	/*
	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
	38	timer_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	*/
1f4f2121	45	lda.w r8, timer_overflow
72a087e0 WD	46	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
	54	unknown_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
	64	1: rjmp 1b