Mercurial > flash_v2

annotate packages/hal/common/current/include/hal_arbiter.h @ 1158:10a36d0fd6f3

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* src/drv_api.c: Added definition of cyg_interrupt_post_dsr() for use in those HALs that need it. * include/hal_arbiter.h (hal_call_isr): Removed ifdef on CYGFUN_HAL_COMMON_KERNEL_SUPPORT around test and call to cyg_interrupt_post_dsr().
author nickg
date Wed, 06 Aug 2003 17:32:30 +0000
parents d2c90368aeef
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #ifndef CYGONCE_HAL_HAL_ARBITER_H
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2 #define CYGONCE_HAL_HAL_ARBITER_H
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3
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4 //=============================================================================
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5 //
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6 // hal_arbiter.h
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7 //
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8 // Functionality used by ISR arbiters
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9 //
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10 //=============================================================================
208
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11 //####ECOSGPLCOPYRIGHTBEGIN####
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12 // -------------------------------------------
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13 // This file is part of eCos, the Embedded Configurable Operating System.
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14 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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15 //
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16 // eCos is free software; you can redistribute it and/or modify it under
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17 // the terms of the GNU General Public License as published by the Free
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18 // Software Foundation; either version 2 or (at your option) any later version.
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19 //
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20 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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21 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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22 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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23 // for more details.
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24 //
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25 // You should have received a copy of the GNU General Public License along
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26 // with eCos; if not, write to the Free Software Foundation, Inc.,
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27 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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28 //
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29 // As a special exception, if other files instantiate templates or use macros
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30 // or inline functions from this file, or you compile this file and link it
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31 // with other works to produce a work based on this file, this file does not
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32 // by itself cause the resulting work to be covered by the GNU General Public
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33 // License. However the source code for this file must still be made available
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34 // in accordance with section (3) of the GNU General Public License.
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35 //
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36 // This exception does not invalidate any other reasons why a work based on
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37 // this file might be covered by the GNU General Public License.
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38 //
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39 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
210
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40 // at http://sources.redhat.com/ecos/ecos-license/
208
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41 // -------------------------------------------
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42 //####ECOSGPLCOPYRIGHTEND####
166
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43 //=============================================================================
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44 //#####DESCRIPTIONBEGIN####
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45 //
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46 // Author(s): jskov
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47 // Contributors:jskov
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48 // Date: 2001-06-29
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49 // Purpose: Functionality used by ISR arbiters
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50 // Usage: #include <cyg/hal/hal_arbiter.h>
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51 //
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52 //####DESCRIPTIONEND####
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53 //
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54 //=============================================================================
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55
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56 #include <cyg/hal/hal_intr.h> // hal_interrupt_x tables
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57 #include <cyg/hal/drv_api.h> // CYG_ISR_HANDLED
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58
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59 //=============================================================================
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60 // Function used to call ISRs from ISR arbiters
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61 // An arbiter is hooked on the shared interrupt vector and looks like this:
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62 //
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63 // cyg_uint32 _arbitration_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
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64 // {
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65 // cyg_uint32 isr_ret;
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66 // // decode interrupt source and for each active source call the ISR
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67 // if (source_A_active) {
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68 // isr_ret = hal_call_isr (CYGNUM_HAL_INTERRUPT_SOURCE_A);
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69 // #ifdef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN
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70 // if (isr_ret & CYG_ISR_HANDLED)
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71 // #endif
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72 // return isr_ret;
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73 // }
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74 // if (source_B_active) {
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75 // isr_ret = hal_call_isr (CYGNUM_HAL_INTERRUPT_SOURCE_B);
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76 // #ifdef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN
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77 // if (isr_ret & CYG_ISR_HANDLED)
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78 // #endif
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79 // return isr_ret;
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80 // }
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81 // ...
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82 // return 0;
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83 // }
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84 //
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85 // Remember to attach and enable the arbiter source:
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86 // HAL_INTERRUPT_ATTACH(CYGNUM_HAL_INTERRUPT_ARBITER, &_arbitration_isr, 0, 0);
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87 // HAL_INTERRUPT_SET_LEVEL(CYGNUM_HAL_INTERRUPT_ARBITER, 1);
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88 // HAL_INTERRUPT_UNMASK(CYGNUM_HAL_INTERRUPT_ARBITER);
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89 //
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90
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91 typedef cyg_uint32 cyg_ISR(cyg_uint32 vector, CYG_ADDRWORD data);
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92
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93 extern void cyg_interrupt_post_dsr( CYG_ADDRWORD intr_obj );
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94
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95 #ifndef CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN
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96
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97 static inline cyg_uint32
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98 hal_call_isr (cyg_uint32 vector)
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99 {
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100 cyg_ISR *isr;
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101 CYG_ADDRWORD data;
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102 cyg_uint32 isr_ret;
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103
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104 isr = (cyg_ISR*) hal_interrupt_handlers[vector];
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105 data = hal_interrupt_data[vector];
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106
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107 isr_ret = (*isr) (vector, data);
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108
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109 if (isr_ret & CYG_ISR_CALL_DSR) {
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110 cyg_interrupt_post_dsr (hal_interrupt_objects[vector]);
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111 }
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112
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113 return isr_ret & ~CYG_ISR_CALL_DSR;
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114 }
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115
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116 #else
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117
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118 // In chained mode, assume vector 0 points to the chain
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119 // handler. Simply call it with the vector number and let it find the
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120 // ISR to call - it will also post DSRs as required.
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121 static inline cyg_uint32
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122 hal_call_isr (cyg_uint32 vector)
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123 {
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124 cyg_ISR *isr;
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125 CYG_ADDRWORD data;
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126 cyg_uint32 isr_ret;
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127
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128 isr = (cyg_ISR*) hal_interrupt_handlers[0];
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129 data = hal_interrupt_data[0];
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130
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131 isr_ret = (*isr) (vector, data);
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132
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133 return isr_ret;
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134 }
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135
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136 #endif
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137
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138 //-----------------------------------------------------------------------------
5602a8379ebc Merge from eCos master repository on 2001-06-29-08:31:51-BST
jlarmour
parents:
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139 #endif // CYGONCE_HAL_HAL_ARBITER_H
5602a8379ebc Merge from eCos master repository on 2001-06-29-08:31:51-BST
jlarmour
parents:
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140 // End of hal_arbiter.h