1 | /* irq_init.c |
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2 | * |
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3 | * This file contains the implementation of rtems initialization |
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4 | * related to interrupt handling. |
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5 | * |
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6 | * CopyRight (C) 2001 valette@crf.canon.fr |
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7 | * |
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8 | * The license and distribution terms for this file may be |
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9 | * found in the file LICENSE in this distribution or at |
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10 | * http://www.OARcorp.com/rtems/license.html. |
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11 | * |
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12 | * $Id$ |
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13 | */ |
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14 | #include <bsp/irq.h> |
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15 | #include <bsp.h> |
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16 | #include <rtems/bspIo.h> |
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17 | #include <libcpu/raw_exception.h> |
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18 | /* |
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19 | #include <bsp/8xx_immap.h> |
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20 | #include <bsp/mbx.h> |
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21 | #include <bsp/commproc.h> |
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22 | */ |
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23 | |
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24 | extern unsigned int external_exception_vector_prolog_code_size; |
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25 | extern void external_exception_vector_prolog_code(); |
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26 | extern unsigned int decrementer_exception_vector_prolog_code_size; |
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27 | extern void decrementer_exception_vector_prolog_code(); |
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28 | |
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29 | extern void BSP_panic(char *s); |
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30 | extern void _BSP_Fatal_error(unsigned int v); |
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31 | /* |
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32 | volatile unsigned int ppc_cached_irq_mask; |
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33 | */ |
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34 | |
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35 | /* |
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36 | * default on/off function |
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37 | */ |
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38 | static void nop_func(){} |
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39 | /* |
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40 | * default isOn function |
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41 | */ |
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42 | static int not_connected() {return 0;} |
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43 | /* |
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44 | * default possible isOn function |
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45 | */ |
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46 | static int connected() {return 1;} |
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47 | |
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48 | static rtems_irq_connect_data rtemsIrq[BSP_IRQ_NUMBER]; |
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49 | static rtems_irq_global_settings initial_config; |
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50 | static rtems_irq_connect_data defaultIrq = { |
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51 | /* vectorIdex, hdl , on , off , isOn */ |
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52 | 0, nop_func , nop_func , nop_func , not_connected |
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53 | }; |
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54 | static rtems_irq_prio irqPrioTable[BSP_IRQ_NUMBER]={ |
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55 | /* |
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56 | * actual priorities for interrupt : |
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57 | */ |
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58 | /* |
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59 | * CPM Interrupts |
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60 | */ |
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61 | 0, 45, 63, 44, 66, 68, 35, 39, 50, 62, 34, 0, 30, 40, 52, 58, |
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62 | 2, 3, 0, 5, 15, 16, 17, 18, 49, 51, 0, 0, 0, 0, 0, 0, |
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63 | 6, 7, 8, 0, 11, 12, 0, 0, 20, 21, 22, 23, 0, 0, 0, 0, |
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64 | 29, 31, 33, 37, 38, 41, 47, 48, 55, 56, 57, 60, 64, 65, 69, 70, |
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65 | /* |
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66 | * Processor exceptions handled as interrupts |
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67 | */ |
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68 | 0 |
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69 | }; |
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70 | |
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71 | |
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72 | /* |
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73 | * Initialize CPM interrupt management |
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74 | */ |
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75 | void |
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76 | BSP_CPM_irq_init(void) |
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77 | { |
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78 | m8260.simr_l = 0; |
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79 | m8260.simr_h = 0; |
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80 | m8260.sipnr_l = 0xffffffff; |
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81 | m8260.sipnr_h = 0xffffffff; |
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82 | m8260.sicr = 0; |
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83 | |
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84 | /* |
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85 | * Initialize the interrupt priorities. |
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86 | */ |
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87 | m8260.siprr = 0x05309770; /* reset value */ |
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88 | m8260.scprr_h = 0x05309770; /* reset value */ |
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89 | m8260.scprr_l = 0x05309770; /* reset value */ |
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90 | |
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91 | } |
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92 | |
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93 | void BSP_rtems_irq_mng_init(unsigned cpuId) |
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94 | { |
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95 | rtems_raw_except_connect_data vectorDesc; |
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96 | int i; |
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97 | |
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98 | BSP_CPM_irq_init(); |
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99 | /* |
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100 | * Initialize Rtems management interrupt table |
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101 | */ |
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102 | /* |
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103 | * re-init the rtemsIrq table |
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104 | */ |
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105 | for (i = 0; i < BSP_IRQ_NUMBER; i++) { |
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106 | rtemsIrq[i] = defaultIrq; |
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107 | rtemsIrq[i].name = i; |
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108 | } |
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109 | /* |
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110 | * Init initial Interrupt management config |
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111 | */ |
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112 | initial_config.irqNb = BSP_IRQ_NUMBER; |
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113 | initial_config.defaultEntry = defaultIrq; |
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114 | initial_config.irqHdlTbl = rtemsIrq; |
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115 | initial_config.irqBase = BSP_ASM_IRQ_VECTOR_BASE; |
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116 | initial_config.irqPrioTbl = irqPrioTable; |
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117 | |
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118 | if (!BSP_rtems_irq_mngt_set(&initial_config)) { |
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119 | /* |
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120 | * put something here that will show the failure... |
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121 | */ |
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122 | BSP_panic("Unable to initialize RTEMS interrupt Management!!! System locked\n"); |
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123 | } |
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124 | |
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125 | /* |
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126 | * We must connect the raw irq handler for the two |
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127 | * expected interrupt sources : decrementer and external interrupts. |
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128 | */ |
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129 | vectorDesc.exceptIndex = ASM_DEC_VECTOR; |
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130 | vectorDesc.hdl.vector = ASM_DEC_VECTOR; |
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131 | vectorDesc.hdl.raw_hdl = decrementer_exception_vector_prolog_code; |
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132 | vectorDesc.hdl.raw_hdl_size = (unsigned) &decrementer_exception_vector_prolog_code_size; |
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133 | vectorDesc.on = nop_func; |
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134 | vectorDesc.off = nop_func; |
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135 | vectorDesc.isOn = connected; |
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136 | if (!mpc8xx_set_exception (&vectorDesc)) { |
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137 | BSP_panic("Unable to initialize RTEMS decrementer raw exception\n"); |
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138 | } |
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139 | vectorDesc.exceptIndex = ASM_EXT_VECTOR; |
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140 | vectorDesc.hdl.vector = ASM_EXT_VECTOR; |
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141 | vectorDesc.hdl.raw_hdl = external_exception_vector_prolog_code; |
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142 | vectorDesc.hdl.raw_hdl_size = (unsigned) &external_exception_vector_prolog_code_size; |
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143 | if (!mpc8xx_set_exception (&vectorDesc)) { |
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144 | BSP_panic("Unable to initialize RTEMS external raw exception\n"); |
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145 | } |
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146 | #ifdef TRACE_IRQ_INIT |
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147 | printk("RTEMS IRQ management is now operationnal\n"); |
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148 | #endif |
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149 | } |
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150 | |
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