1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Source file for timer functions. |
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5 | */ |
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6 | |
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7 | /* |
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8 | * Copyright (c) 2008 |
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9 | * Embedded Brains GmbH |
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10 | * Obere Lagerstr. 30 |
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11 | * D-82178 Puchheim |
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12 | * Germany |
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13 | * rtems@embedded-brains.de |
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14 | * |
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15 | * The license and distribution terms for this file may be |
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16 | * found in the file LICENSE in this distribution or at |
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17 | * http://www.rtems.org/license/LICENSE. |
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18 | */ |
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19 | |
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20 | #include <rtems/bspIo.h> |
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21 | |
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22 | #include <mpc83xx/mpc83xx.h> |
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23 | #include <mpc83xx/gtm.h> |
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24 | |
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25 | #define RTEMS_STATUS_CHECKS_USE_PRINTK |
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26 | |
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27 | #include <rtems/status-checks.h> |
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28 | |
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29 | #define MPC83XX_GTM_CHECK_INDEX( timer) \ |
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30 | if (( timer) < 0 || ( timer) >= MPC83XX_GTM_NUMBER) { \ |
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31 | return RTEMS_INVALID_NUMBER; \ |
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32 | } |
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33 | |
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34 | #define GTM_MODULE(timer) ((timer)/4) |
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35 | #define GTM_MODULE_TIMER(timer) ((timer)%4) |
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36 | #define GTM_HIGH(timer) (GTM_MODULE_TIMER(timer)/2) |
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37 | #define GTM_LOW(timer) (GTM_MODULE_TIMER(timer)%2) |
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38 | |
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39 | #define MPC83XX_GTM_CLOCK_MASK MPC83XX_GTM_CLOCK_EXTERN |
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40 | |
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41 | static const uint8_t mpc83xx_gmt_interrupt_vector_table [MPC83XX_GTM_NUMBER] = { 90, 78, 84, 72, 91, 79, 85, 73 }; |
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42 | |
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43 | rtems_status_code mpc83xx_gtm_initialize( int timer, int clock) |
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44 | { |
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45 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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46 | rtems_interrupt_level level; |
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47 | |
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48 | unsigned mask = 0xfU << (GTM_LOW(timer) * 4); |
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49 | unsigned flags = 0x3U << (GTM_LOW(timer) * 4); |
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50 | uint8_t reg = 0; |
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51 | |
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52 | MPC83XX_GTM_CHECK_INDEX( timer); |
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53 | |
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54 | rtems_interrupt_disable( level); |
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55 | |
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56 | reg = mpc83xx.gtm [GTM_MODULE(timer)].gtcfr [GTM_HIGH(timer)].reg; |
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57 | mpc83xx.gtm [GTM_MODULE(timer)].gtcfr [GTM_HIGH(timer)].reg = |
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58 | (uint8_t) ((reg & ~mask) | flags); |
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59 | |
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60 | mpc83xx.gtm [GTM_MODULE(timer)] |
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61 | .gt_tim_regs [GTM_HIGH(timer)] |
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62 | .gtmdr [GTM_LOW(timer)] = 0; |
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63 | |
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64 | rtems_interrupt_enable( level); |
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65 | |
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66 | sc = mpc83xx_gtm_set_clock( timer, clock); |
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67 | RTEMS_CHECK_SC( sc, "Set clock"); |
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68 | |
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69 | sc = mpc83xx_gtm_set_value( timer, 0); |
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70 | RTEMS_CHECK_SC( sc, "Set value"); |
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71 | |
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72 | sc = mpc83xx_gtm_set_reference( timer, 0); |
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73 | RTEMS_CHECK_SC( sc, "Set reference"); |
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74 | |
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75 | sc = mpc83xx_gtm_set_prescale( timer, 0); |
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76 | RTEMS_CHECK_SC( sc, "Set prescale"); |
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77 | |
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78 | return RTEMS_SUCCESSFUL; |
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79 | } |
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80 | |
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81 | rtems_status_code mpc83xx_gtm_enable_restart( int timer, bool enable) |
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82 | { |
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83 | rtems_interrupt_level level; |
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84 | MPC83XX_GTM_CHECK_INDEX( timer); |
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85 | |
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86 | rtems_interrupt_disable( level); |
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87 | |
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88 | if (enable) { |
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89 | mpc83xx.gtm [GTM_MODULE(timer)] |
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90 | .gt_tim_regs [GTM_HIGH(timer)] |
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91 | .gtmdr [GTM_LOW(timer)] |= 0x0008; |
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92 | } else { |
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93 | mpc83xx.gtm [GTM_MODULE(timer)] |
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94 | .gt_tim_regs [GTM_HIGH(timer)] |
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95 | .gtmdr [GTM_LOW(timer)] &= ~0x0008; |
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96 | } |
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97 | |
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98 | rtems_interrupt_enable( level); |
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99 | |
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100 | return RTEMS_SUCCESSFUL; |
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101 | } |
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102 | |
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103 | rtems_status_code mpc83xx_gtm_set_clock( int timer, int clock) |
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104 | { |
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105 | rtems_interrupt_level level; |
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106 | uint16_t reg = 0; |
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107 | |
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108 | MPC83XX_GTM_CHECK_INDEX( timer); |
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109 | |
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110 | if (clock & ~MPC83XX_GTM_CLOCK_MASK) { |
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111 | return RTEMS_INVALID_CLOCK; |
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112 | } |
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113 | |
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114 | rtems_interrupt_disable( level); |
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115 | |
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116 | reg = mpc83xx.gtm [GTM_MODULE(timer)] |
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117 | .gt_tim_regs [GTM_HIGH(timer)] |
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118 | .gtmdr [GTM_LOW(timer)]; |
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119 | mpc83xx.gtm [GTM_MODULE(timer)] |
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120 | .gt_tim_regs [GTM_HIGH(timer)] |
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121 | .gtmdr [GTM_LOW(timer)] = (reg & ~MPC83XX_GTM_CLOCK_MASK) | clock; |
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122 | |
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123 | rtems_interrupt_enable( level); |
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124 | |
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125 | return RTEMS_SUCCESSFUL; |
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126 | } |
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127 | |
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128 | rtems_status_code mpc83xx_gtm_get_clock( int timer, int *clock) |
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129 | { |
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130 | MPC83XX_GTM_CHECK_INDEX( timer); |
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131 | |
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132 | *clock = mpc83xx.gtm [GTM_MODULE(timer)] |
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133 | .gt_tim_regs [GTM_HIGH(timer)] |
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134 | .gtmdr [GTM_LOW(timer)] & MPC83XX_GTM_CLOCK_MASK; |
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135 | |
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136 | return RTEMS_SUCCESSFUL; |
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137 | } |
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138 | |
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139 | rtems_status_code mpc83xx_gtm_start( int timer) |
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140 | { |
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141 | rtems_interrupt_level level; |
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142 | uint8_t flags = 0x2 << (GTM_LOW(timer) * 4); |
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143 | |
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144 | MPC83XX_GTM_CHECK_INDEX( timer); |
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145 | |
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146 | rtems_interrupt_disable( level); |
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147 | mpc83xx.gtm [GTM_MODULE(timer)] |
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148 | .gtcfr [GTM_HIGH(timer)].reg &= ~flags; |
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149 | rtems_interrupt_enable( level); |
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150 | |
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151 | return RTEMS_SUCCESSFUL; |
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152 | } |
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153 | |
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154 | rtems_status_code mpc83xx_gtm_stop( int timer) |
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155 | { |
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156 | rtems_interrupt_level level; |
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157 | uint8_t flags = 0x2 << (GTM_LOW(timer) * 4); |
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158 | |
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159 | MPC83XX_GTM_CHECK_INDEX( timer); |
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160 | |
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161 | rtems_interrupt_disable( level); |
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162 | mpc83xx.gtm [GTM_MODULE(timer)].gtcfr [GTM_HIGH(timer)].reg |= flags; |
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163 | rtems_interrupt_enable( level); |
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164 | |
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165 | return RTEMS_SUCCESSFUL; |
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166 | } |
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167 | |
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168 | rtems_status_code mpc83xx_gtm_set_value( int timer, uint16_t value) |
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169 | { |
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170 | MPC83XX_GTM_CHECK_INDEX( timer); |
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171 | |
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172 | mpc83xx.gtm [GTM_MODULE(timer)].gt_tim_regs [GTM_HIGH(timer)].gtcnr [GTM_LOW(timer)] = value; |
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173 | |
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174 | return RTEMS_SUCCESSFUL; |
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175 | } |
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176 | |
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177 | rtems_status_code mpc83xx_gtm_get_value( int timer, uint16_t *value) |
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178 | { |
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179 | MPC83XX_GTM_CHECK_INDEX( timer); |
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180 | |
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181 | *value = mpc83xx.gtm [GTM_MODULE(timer)].gt_tim_regs [GTM_HIGH(timer)].gtcnr [GTM_LOW(timer)]; |
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182 | |
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183 | return RTEMS_SUCCESSFUL; |
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184 | } |
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185 | |
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186 | rtems_status_code mpc83xx_gtm_set_reference( int timer, uint16_t reference) |
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187 | { |
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188 | MPC83XX_GTM_CHECK_INDEX( timer); |
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189 | |
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190 | mpc83xx.gtm [GTM_MODULE(timer)].gt_tim_regs [GTM_HIGH(timer)].gtrfr [GTM_LOW(timer)] = reference; |
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191 | |
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192 | return RTEMS_SUCCESSFUL; |
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193 | } |
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194 | |
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195 | rtems_status_code mpc83xx_gtm_get_reference( int timer, uint16_t *reference) |
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196 | { |
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197 | MPC83XX_GTM_CHECK_INDEX( timer); |
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198 | |
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199 | *reference = mpc83xx.gtm [GTM_MODULE(timer)].gt_tim_regs [GTM_HIGH(timer)].gtrfr [GTM_LOW(timer)]; |
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200 | |
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201 | return RTEMS_SUCCESSFUL; |
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202 | } |
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203 | |
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204 | rtems_status_code mpc83xx_gtm_set_prescale( int timer, uint8_t prescale) |
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205 | { |
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206 | MPC83XX_GTM_CHECK_INDEX( timer); |
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207 | |
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208 | mpc83xx.gtm [GTM_MODULE(timer)].gtpsr [GTM_MODULE_TIMER(timer)] = prescale; |
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209 | |
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210 | return RTEMS_SUCCESSFUL; |
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211 | } |
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212 | |
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213 | rtems_status_code mpc83xx_gtm_get_prescale( int timer, uint8_t *prescale) |
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214 | { |
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215 | MPC83XX_GTM_CHECK_INDEX( timer); |
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216 | |
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217 | *prescale = mpc83xx.gtm [GTM_MODULE(timer)].gtpsr [GTM_MODULE_TIMER(timer)]; |
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218 | |
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219 | return RTEMS_SUCCESSFUL; |
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220 | } |
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221 | |
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222 | rtems_status_code mpc83xx_gtm_interrupt_get_vector( int timer, rtems_vector_number *vector) |
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223 | { |
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224 | MPC83XX_GTM_CHECK_INDEX( timer); |
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225 | |
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226 | *vector = mpc83xx_gmt_interrupt_vector_table [timer]; |
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227 | |
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228 | return RTEMS_SUCCESSFUL; |
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229 | } |
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230 | |
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231 | rtems_status_code mpc83xx_gtm_interrupt_enable( int timer) |
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232 | { |
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233 | rtems_interrupt_level level; |
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234 | MPC83XX_GTM_CHECK_INDEX( timer); |
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235 | |
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236 | rtems_interrupt_disable( level); |
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237 | mpc83xx.gtm [GTM_MODULE(timer)].gt_tim_regs [GTM_HIGH(timer)].gtmdr [GTM_LOW(timer)] |= 0x0010; |
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238 | rtems_interrupt_enable( level); |
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239 | |
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240 | return RTEMS_SUCCESSFUL; |
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241 | } |
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242 | |
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243 | rtems_status_code mpc83xx_gtm_interrupt_disable( int timer) |
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244 | { |
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245 | rtems_interrupt_level level; |
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246 | MPC83XX_GTM_CHECK_INDEX( timer); |
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247 | |
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248 | rtems_interrupt_disable( level); |
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249 | mpc83xx.gtm [GTM_MODULE(timer)].gt_tim_regs [GTM_HIGH(timer)].gtmdr [GTM_LOW(timer)] &= ~0x0010; |
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250 | rtems_interrupt_enable( level); |
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251 | |
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252 | return RTEMS_SUCCESSFUL; |
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253 | } |
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254 | |
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255 | rtems_status_code mpc83xx_gtm_interrupt_clear( int timer) |
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256 | { |
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257 | MPC83XX_GTM_CHECK_INDEX( timer); |
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258 | |
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259 | mpc83xx.gtm [GTM_MODULE(timer)].gtevr [GTM_MODULE_TIMER(timer)] = 0x0002; |
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260 | |
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261 | return RTEMS_SUCCESSFUL; |
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262 | } |
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