1 | /* FPGA.c -- Bridge for second and subsequent generations |
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2 | * |
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3 | * COPYRIGHT (c) 1989-2001. |
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4 | * On-Line Applications Research Corporation (OAR). |
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5 | * |
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6 | * The license and distribution terms for this file may in |
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7 | * the file LICENSE in this distribution or at |
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8 | * http://www.rtems.com/license/LICENSE. |
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9 | * |
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10 | * $Id: |
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11 | */ |
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12 | |
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13 | #include <bsp.h> |
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14 | #include <string.h> |
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15 | #include <fcntl.h> |
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16 | #include <assert.h> |
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17 | |
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18 | #include <rtems/libio.h> |
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19 | #include <rtems/libcsupport.h> |
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20 | |
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21 | /* |
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22 | * initialize FPGA |
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23 | */ |
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24 | void initialize_PCI_bridge () |
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25 | { |
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26 | #if (!SCORE603E_USE_DINK) |
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27 | uint16_t mask, shift, data; |
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28 | |
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29 | shift = SCORE603E_85C30_0_IRQ - Score_IRQ_First; |
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30 | mask = 1 << shift; |
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31 | |
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32 | shift = SCORE603E_85C30_1_IRQ - Score_IRQ_First; |
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33 | mask = mask & (1 << shift); |
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34 | |
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35 | data = *SCORE603E_FPGA_MASK_DATA; |
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36 | data = ~mask; |
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37 | |
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38 | *SCORE603E_FPGA_MASK_DATA = data; |
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39 | #endif |
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40 | |
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41 | } |
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42 | |
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43 | void set_irq_mask( |
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44 | uint16_t value |
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45 | ) |
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46 | { |
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47 | uint16_t *loc; |
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48 | |
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49 | loc = (uint16_t*)SCORE603E_FPGA_MASK_DATA; |
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50 | |
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51 | *loc = value; |
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52 | } |
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53 | |
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54 | uint16_t get_irq_mask() |
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55 | { |
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56 | uint16_t *loc; |
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57 | uint16_t value; |
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58 | |
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59 | loc = (uint16_t*)SCORE603E_FPGA_MASK_DATA; |
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60 | |
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61 | value = *loc; |
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62 | |
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63 | return value; |
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64 | } |
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65 | |
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66 | void unmask_irq( |
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67 | uint16_t irq_idx |
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68 | ) |
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69 | { |
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70 | uint16_t value; |
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71 | uint32_t mask_idx = irq_idx; |
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72 | |
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73 | value = get_irq_mask(); |
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74 | |
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75 | #if (HAS_PMC_PSC8) |
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76 | switch (irq_idx + Score_IRQ_First ) { |
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77 | case SCORE603E_85C30_4_IRQ: |
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78 | case SCORE603E_85C30_2_IRQ: |
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79 | case SCORE603E_85C30_5_IRQ: |
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80 | case SCORE603E_85C30_3_IRQ: |
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81 | mask_idx = SCORE603E_PCI_IRQ_0 - Score_IRQ_First; |
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82 | break; |
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83 | default: |
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84 | break; |
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85 | } |
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86 | #endif |
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87 | |
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88 | value &= (~(0x1 << mask_idx)); |
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89 | set_irq_mask( value ); |
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90 | } |
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91 | |
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92 | void init_irq_data_register() |
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93 | { |
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94 | uint32_t index; |
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95 | uint32_t i; |
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96 | |
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97 | #if (SCORE603E_USE_DINK) |
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98 | set_irq_mask( 0xffff ); |
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99 | #endif |
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100 | |
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101 | /* |
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102 | * Clear any existing interupts from the vector data register. |
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103 | */ |
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104 | for (i=0; i<20; i++) { |
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105 | index = (*SCORE603E_FPGA_VECT_DATA); |
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106 | if ( (index&0x10) != 0x10 ) |
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107 | break; |
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108 | } |
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109 | } |
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110 | |
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111 | uint16_t read_and_clear_PMC_irq( |
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112 | uint16_t irq |
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113 | ) |
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114 | { |
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115 | uint16_t status_word = irq; |
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116 | |
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117 | status_word = (*BSP_PMC_STATUS_ADDRESS); |
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118 | |
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119 | return status_word; |
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120 | } |
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121 | |
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122 | rtems_boolean Is_PMC_IRQ( |
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123 | uint32_t pmc_irq, |
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124 | uint16_t status_word |
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125 | ) |
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126 | { |
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127 | rtems_boolean result= FALSE; |
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128 | |
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129 | switch(pmc_irq) { |
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130 | case SCORE603E_85C30_4_IRQ: |
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131 | result = Is_PMC_85C30_4_IRQ( status_word ); |
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132 | break; |
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133 | case SCORE603E_85C30_2_IRQ: |
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134 | result = Is_PMC_85C30_2_IRQ( status_word ); |
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135 | break; |
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136 | case SCORE603E_85C30_5_IRQ: |
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137 | result = Is_PMC_85C30_5_IRQ( status_word ); |
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138 | break; |
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139 | case SCORE603E_85C30_3_IRQ: |
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140 | result = Is_PMC_85C30_3_IRQ( status_word ); |
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141 | break; |
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142 | default: |
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143 | assert( 0 ); |
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144 | break; |
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145 | } |
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146 | |
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147 | return result; |
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148 | } |
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149 | |
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150 | uint16_t read_and_clear_irq() |
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151 | { |
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152 | uint16_t irq; |
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153 | |
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154 | irq = (*SCORE603E_FPGA_VECT_DATA); |
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155 | |
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156 | if ((irq & 0xffff0) != 0x10) { |
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157 | DEBUG_puts( "ERROR:: no irq data\n"); |
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158 | return (irq | 0x80); |
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159 | } |
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160 | |
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161 | irq &=0xf; |
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162 | |
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163 | return irq; |
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164 | } |
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