4.104.114.84.95
Last change
on this file since 1cfcfd3 was
af85485,
checked in by Jay Monkman <jtm@…>, on 07/15/04 at 06:24:14
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2004-07-15 Jay Monkman
- ChangeLog?, Makefile.am, clock/.cvsignore, clock/clock.c,
dbgu/.cvsignore, dbgu/dbgu.c, include/at91rm9200.h,
include/at91rm9200_dbgu.h, include/at91rm9200_emac.h,
include/at91rm9200_gpio.h, include/at91rm9200_mem.h,
include/at91rm9200_pmc.h, include/bits.h, irq/.cvsignore,
irq/bsp_irq_asm.S, irq/bsp_irq_init.c, irq/irq.c, irq/irq.h,
pmc/pmc.c, timer/.cvsignore, timer/timer.c: New files.
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-
Property mode set to
100644
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File size:
1.0 KB
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1 | /* |
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2 | * Atmel AT91RM9200 Interrupt handler |
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3 | * |
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4 | * Copyright (c) 2004 by Jay Monkman <jtm@lopgindog.com> |
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5 | * |
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6 | * The license and distribution terms for this file may be |
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7 | * found in the file LICENSE in this distribution or at |
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8 | * |
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9 | * http://www.OARcorp.com/rtems/license.html. |
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10 | * |
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11 | * |
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12 | * $Id$ |
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13 | */ |
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14 | #define __asm__ |
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15 | |
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16 | .globl ExecuteITHandler |
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17 | ExecuteITHandler : |
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18 | /* |
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19 | * Look at interrupt status register to determine source. |
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20 | * From source, determine offset into expanded vector table |
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21 | * and load handler address into r0. |
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22 | */ |
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23 | ldr r0, =0xFFFFF100 /* AIC_CTL_BASE + AIC_IVR */ |
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24 | ldr r1, [r0] |
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25 | str r1, [r0] /* write back in case we are using protect */ |
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26 | |
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27 | stmdb sp!,{lr} |
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28 | ldr lr, =IRQ_return /* prepare the return from handler */ |
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29 | |
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30 | mov pc, r1 /* execute handler */ |
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31 | |
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32 | IRQ_return: |
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33 | ldr r2, =0xFFFFF130 /* AIC_CTL_BASE + AIC_EIOCR */ |
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34 | str r1, [r2] |
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35 | |
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36 | ldmia sp!,{lr} |
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37 | |
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38 | mov pc, lr |
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