1 | /* |
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2 | * This file contains the MVME162 console IO package. |
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3 | */ |
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4 | |
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5 | /* |
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6 | * COPYRIGHT (c) 1989-2013. |
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7 | * On-Line Applications Research Corporation (OAR). |
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8 | * |
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9 | * The license and distribution terms for this file may be |
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10 | * found in the file LICENSE in this distribution or at |
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11 | * http://www.rtems.org/license/LICENSE. |
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12 | * |
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13 | * Modifications of respective RTEMS file: COPYRIGHT (c) 1994. |
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14 | * EISCAT Scientific Association. M.Savitski |
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15 | * |
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16 | * This material is a part of the MVME162 Board Support Package |
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17 | * for the RTEMS executive. Its licensing policies are those of the |
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18 | * RTEMS above. |
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19 | */ |
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20 | |
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21 | #define M162_INIT |
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22 | |
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23 | #include <rtems/bspIo.h> |
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24 | #include <rtems/console.h> |
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25 | #include <rtems/libio.h> |
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26 | #include <rtems/ringbuf.h> |
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27 | #include <bsp.h> |
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28 | |
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29 | Ring_buffer_t Console_Buffer[2]; |
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30 | |
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31 | /* |
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32 | * Interrupt handler for receiver interrupts |
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33 | */ |
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34 | static rtems_isr C_Receive_ISR(rtems_vector_number vector) |
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35 | { |
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36 | register int ipend, port; |
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37 | |
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38 | ZWRITE0(1, 0x38); /* reset highest IUS */ |
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39 | |
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40 | ipend = ZREAD(1, 3); /* read int pending from A side */ |
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41 | |
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42 | if (ipend == 0x04) port = 0; /* channel B intr pending */ |
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43 | else if (ipend == 0x20) port = 1; /* channel A intr pending */ |
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44 | else return; |
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45 | |
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46 | Ring_buffer_Add_character(&Console_Buffer[port], ZREADD(port)); |
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47 | |
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48 | if (ZREAD(port, 1) & 0x70) { /* check error stat */ |
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49 | ZWRITE0(port, 0x30); /* reset error */ |
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50 | } |
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51 | } |
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52 | |
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53 | rtems_device_driver console_initialize( |
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54 | rtems_device_major_number major, |
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55 | rtems_device_minor_number minor, |
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56 | void *arg |
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57 | ) |
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58 | { |
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59 | int i; |
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60 | rtems_status_code status; |
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61 | |
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62 | /* |
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63 | * Initialise receiver interrupts on both ports |
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64 | */ |
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65 | for (i = 0; i <= 1; i++) { |
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66 | Ring_buffer_Initialize( &Console_Buffer[i] ); |
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67 | ZWRITE(i, 2, SCC_VECTOR); |
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68 | ZWRITE(i, 10, 0); |
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69 | ZWRITE(i, 1, 0x10); /* int on all Rx chars or special condition */ |
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70 | ZWRITE(i, 9, 8); /* master interrupt enable */ |
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71 | } |
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72 | |
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73 | set_vector(C_Receive_ISR, SCC_VECTOR, 1); /* install ISR for ports A and B */ |
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74 | |
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75 | mcchip->vector_base = 0; |
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76 | mcchip->gen_control = 2; /* MIEN */ |
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77 | mcchip->SCC_int_ctl = 0x13; /* SCC IEN, IPL3 */ |
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78 | |
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79 | status = rtems_io_register_name( |
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80 | "/dev/console", |
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81 | major, |
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82 | (rtems_device_minor_number) 1 |
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83 | ); |
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84 | |
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85 | if (status != RTEMS_SUCCESSFUL) |
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86 | rtems_fatal_error_occurred(status); |
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87 | |
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88 | status = rtems_io_register_name( |
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89 | "/dev/tty00", |
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90 | major, |
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91 | (rtems_device_minor_number) 0 |
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92 | ); |
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93 | |
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94 | if (status != RTEMS_SUCCESSFUL) |
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95 | rtems_fatal_error_occurred(status); |
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96 | |
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97 | status = rtems_io_register_name( |
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98 | "/dev/tty01", |
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99 | major, |
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100 | (rtems_device_minor_number) 1 |
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101 | ); |
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102 | |
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103 | if (status != RTEMS_SUCCESSFUL) |
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104 | rtems_fatal_error_occurred(status); |
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105 | |
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106 | return RTEMS_SUCCESSFUL; |
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107 | } |
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108 | |
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109 | /* |
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110 | * Non-blocking char input |
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111 | */ |
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112 | bool char_ready(int port, char *ch) |
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113 | { |
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114 | if ( Ring_buffer_Is_empty( &Console_Buffer[port] ) ) |
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115 | return false; |
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116 | |
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117 | Ring_buffer_Remove_character( &Console_Buffer[port], *ch ); |
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118 | |
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119 | return true; |
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120 | } |
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121 | |
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122 | /* |
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123 | * Block on char input |
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124 | */ |
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125 | static char inbyte(int port) |
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126 | { |
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127 | char tmp_char; |
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128 | |
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129 | while ( !char_ready(port, &tmp_char) ); |
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130 | return tmp_char; |
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131 | } |
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132 | |
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133 | /* |
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134 | * This routine transmits a character out the SCC. It no longer supports |
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135 | * XON/XOFF flow control. |
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136 | */ |
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137 | static void outbyte(char ch, int port) |
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138 | { |
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139 | while (1) { |
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140 | if (ZREAD0(port) & TX_BUFFER_EMPTY) break; |
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141 | } |
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142 | ZWRITED(port, ch); |
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143 | } |
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144 | |
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145 | /* |
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146 | * Open entry point |
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147 | */ |
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148 | rtems_device_driver console_open( |
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149 | rtems_device_major_number major, |
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150 | rtems_device_minor_number minor, |
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151 | void * arg |
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152 | ) |
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153 | { |
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154 | return RTEMS_SUCCESSFUL; |
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155 | } |
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156 | |
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157 | /* |
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158 | * Close entry point |
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159 | */ |
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160 | rtems_device_driver console_close( |
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161 | rtems_device_major_number major, |
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162 | rtems_device_minor_number minor, |
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163 | void * arg |
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164 | ) |
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165 | { |
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166 | return RTEMS_SUCCESSFUL; |
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167 | } |
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168 | |
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169 | /* |
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170 | * read bytes from the serial port. We only have stdin. |
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171 | */ |
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172 | rtems_device_driver console_read( |
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173 | rtems_device_major_number major, |
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174 | rtems_device_minor_number minor, |
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175 | void * arg |
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176 | ) |
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177 | { |
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178 | rtems_libio_rw_args_t *rw_args; |
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179 | char *buffer; |
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180 | int maximum; |
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181 | int count = 0; |
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182 | |
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183 | rw_args = (rtems_libio_rw_args_t *) arg; |
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184 | |
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185 | buffer = rw_args->buffer; |
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186 | maximum = rw_args->count; |
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187 | |
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188 | if ( minor > 1 ) |
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189 | return RTEMS_INVALID_NUMBER; |
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190 | |
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191 | for (count = 0; count < maximum; count++) { |
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192 | buffer[ count ] = inbyte( minor ); |
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193 | if (buffer[ count ] == '\n' || buffer[ count ] == '\r') { |
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194 | buffer[ count++ ] = '\n'; |
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195 | break; |
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196 | } |
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197 | } |
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198 | |
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199 | rw_args->bytes_moved = count; |
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200 | return (count >= 0) ? RTEMS_SUCCESSFUL : RTEMS_UNSATISFIED; |
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201 | } |
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202 | |
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203 | /* |
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204 | * write bytes to the serial port. Stdout and stderr are the same. |
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205 | */ |
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206 | rtems_device_driver console_write( |
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207 | rtems_device_major_number major, |
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208 | rtems_device_minor_number minor, |
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209 | void * arg |
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210 | ) |
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211 | { |
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212 | int count; |
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213 | int maximum; |
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214 | rtems_libio_rw_args_t *rw_args; |
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215 | char *buffer; |
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216 | |
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217 | rw_args = (rtems_libio_rw_args_t *) arg; |
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218 | |
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219 | buffer = rw_args->buffer; |
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220 | maximum = rw_args->count; |
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221 | |
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222 | if ( minor > 1 ) |
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223 | return RTEMS_INVALID_NUMBER; |
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224 | |
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225 | for (count = 0; count < maximum; count++) { |
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226 | if ( buffer[ count ] == '\n') { |
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227 | outbyte('\r', minor ); |
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228 | } |
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229 | outbyte( buffer[ count ], minor ); |
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230 | } |
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231 | |
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232 | rw_args->bytes_moved = maximum; |
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233 | return 0; |
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234 | } |
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235 | |
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236 | /* |
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237 | * IO Control entry point |
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238 | */ |
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239 | rtems_device_driver console_control( |
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240 | rtems_device_major_number major, |
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241 | rtems_device_minor_number minor, |
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242 | void * arg |
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243 | ) |
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244 | { |
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245 | return RTEMS_SUCCESSFUL; |
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246 | } |
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247 | |
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248 | /* |
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249 | * _162Bug_output_char |
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250 | * |
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251 | * Output a single character using the 162Bug functions. The character |
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252 | * will be written to the default output port. |
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253 | */ |
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254 | static void _162Bug_output_char( char c ) |
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255 | { |
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256 | asm volatile( "moveb %0, -(%%sp)\n\t" /* char to output */ |
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257 | "trap #15\n\t" /* Trap to 162Bug */ |
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258 | ".short 0x20" /* Code for .OUTCHR */ |
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259 | :: "d" (c) ); |
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260 | } |
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261 | |
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262 | /* |
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263 | * _BSP_output_char |
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264 | * |
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265 | * printk() function prototyped in bspIo.h. Does not use termios. |
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266 | * |
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267 | * If we have initialized the console device then use it, otherwise |
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268 | * use the 162Bug routines to send it to the default output port. |
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269 | */ |
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270 | static void _BSP_output_char(char c) |
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271 | { |
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272 | _162Bug_output_char(c); |
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273 | } |
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274 | |
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275 | /* Printk function */ |
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276 | BSP_output_char_function_type BSP_output_char = _BSP_output_char; |
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277 | BSP_polling_getchar_function_type BSP_poll_char = NULL; |
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