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annotate packages/hal/arm/iq80310/current/src/diag/irq.S @ 208:e0c0827131d1 ecos

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Merge from eCos master repository on 2002-05-20-20:11:54-BST
author jlarmour
date Mon, 20 May 2002 22:19:26 +0000
parents f935b880e96c
children d2c90368aeef
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1 //=============================================================================
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2 //
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3 // irq.S - Cyclone Diagnostics
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4 //
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5 //=============================================================================
208
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6 //####ECOSGPLCOPYRIGHTBEGIN####
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7 // -------------------------------------------
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8 // This file is part of eCos, the Embedded Configurable Operating System.
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9 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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10 //
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11 // eCos is free software; you can redistribute it and/or modify it under
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12 // the terms of the GNU General Public License as published by the Free
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13 // Software Foundation; either version 2 or (at your option) any later version.
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14 //
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15 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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16 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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17 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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18 // for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License along
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21 // with eCos; if not, write to the Free Software Foundation, Inc.,
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22 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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23 //
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24 // As a special exception, if other files instantiate templates or use macros
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25 // or inline functions from this file, or you compile this file and link it
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26 // with other works to produce a work based on this file, this file does not
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27 // by itself cause the resulting work to be covered by the GNU General Public
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28 // License. However the source code for this file must still be made available
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29 // in accordance with section (3) of the GNU General Public License.
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30 //
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31 // This exception does not invalidate any other reasons why a work based on
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32 // this file might be covered by the GNU General Public License.
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33 //
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34 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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35 // at http://sources.redhat.com/ecos/ecos-license
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36 // -------------------------------------------
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37 //####ECOSGPLCOPYRIGHTEND####
152
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38 //=============================================================================
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39 //#####DESCRIPTIONBEGIN####
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40 //
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41 // Author(s): Scott Coulter, Jeff Frazier, Eric Breeden
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42 // Contributors:
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43 // Date: 2001-01-25
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44 // Purpose:
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45 // Description:
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46 //
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47 //####DESCRIPTIONEND####
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48 //
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49 //===========================================================================*/
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50
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51 /*
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52 * Low-lebvel interrupt support for IQ80310 diags
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53 */
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54 .extern iq80310_irq_handler
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55 .extern iq80310_fiq_handler
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56
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57 .text
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58 .globl __diag_IRQ
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59 __diag_IRQ:
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60 ldr sp, =__irq_stack /* point stack pointer at IRQ stack */
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61 sub lr, lr, #4 /* adjust lr (return to last address) */
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62 stmfd sp!, {r12, lr} /* push r12 and link reg onto stack */
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63 mrs r12, spsr /* store spsr in r12 */
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64 stmfd sp!, {r12} /* push spsr onto stack */
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65 stmfd sp!, {r0-r11} /* push all registers onto stack */
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66 bl iq80310_irq_handler
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67 ldmfd sp!, {r0-r12} /* restore r0 thru r12 */
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68 msr spsr, r12 /* restore SPSR */
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69 ldmfd sp!, {r12,pc}^ /* restore r12 and PC, return */
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70
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71 .globl __diag_FIQ
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72 __diag_FIQ:
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73 /* Cyclone FIQ handler */
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74 /* save registers onto stack */
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75 ldr sp, =__fiq_stack /* point stack pointer at FIQ stack */
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76 sub lr, lr, #4 /* adjust link register (return to last address) */
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77 stmfd sp!, {r12, lr} /* push r12 and link reg onto stack */
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78 mrs r12, spsr /* store spsr in r12 */
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79 stmfd sp!, {r12} /* push spsr onto stack */
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80 stmfd sp!, {r0-r7} /* push r0 thru r7 (r8 - r14 are banked) */
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81 bl iq80310_fiq_handler
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82 /* restore registers and return */
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83 ldmfd sp!, {r0-r7} /* restore r0 thru r7 (r8 - r14 are banked) */
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84 ldmfd sp!, {r12}
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85 msr spsr, r12 /* restore SPSR */
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86 ldmfd sp!, {r12,pc}^ /* restore r12 and PC, return to inst before exception occurred */
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87
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88 .globl __ignore_abort
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89 __ignore_abort:
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90 subs pc,lr,#4
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91
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92 .globl _cspr_enable_fiq_int
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93 _cspr_enable_fiq_int:
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94 mrs r0, cpsr
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95 bic r0, r0, #0x40
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96 msr cpsr, r0
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97 mov pc, lr
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98
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99 .globl _cspr_enable_irq_int
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100 _cspr_enable_irq_int:
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101 mrs r0, cpsr
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102 bic r0, r0, #0x80
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103 msr cpsr, r0
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104 mov pc, lr
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105
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106 .bss
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107 .rept 1024
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108 .word 0
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109 .endr
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110 __irq_stack:
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111 .rept 1024
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112 .word 0
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113 .endr
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114 __fiq_stack:
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115
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116