1 | #include <bsp.h> |
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2 | |
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3 | #if 1 |
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4 | |
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5 | static void outbyte(char c) { |
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6 | volatile char * const pc16550 = (char *) IO_TO_LOCAL(0x03f8); |
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7 | # define THR 0 |
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8 | # define LSR 5 |
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9 | # define THRE 0x20 |
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10 | while ((pc16550[LSR] & THRE) == 0) { |
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11 | ; |
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12 | } |
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13 | pc16550[THR] = c; |
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14 | } |
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15 | |
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16 | #else |
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17 | |
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18 | /* printk to memory for debugging */ |
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19 | static void outbyte(char c) { |
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20 | static char *memory_log = (char *) 0x01F00000; |
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21 | |
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22 | *memory_log++ = c; |
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23 | if (memory_log >= (char *) 0x01F80000) { |
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24 | memory_log--; |
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25 | } |
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26 | } |
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27 | |
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28 | #endif |
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29 | |
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30 | /*-------------------------------------------------------------------------+ |
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31 | | printk.c v1.1 - PC386 BSP - 1997/08/07 |
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32 | +--------------------------------------------------------------------------+ |
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33 | | (C) Copyright 1997 - |
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34 | | - NavIST Group - Real-Time Distributed Systems and Industrial Automation |
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35 | | |
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36 | | http://pandora.ist.utl.pt |
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37 | | |
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38 | | Instituto Superior Tecnico * Lisboa * PORTUGAL |
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39 | +--------------------------------------------------------------------------+ |
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40 | | Disclaimer: |
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41 | | |
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42 | | This file is provided "AS IS" without warranty of any kind, either |
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43 | | expressed or implied. |
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44 | +--------------------------------------------------------------------------+ |
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45 | | This code is based on code by: Jose Rufino - IST |
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46 | | |
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47 | | $Id$ |
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48 | +--------------------------------------------------------------------------*/ |
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49 | |
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50 | |
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51 | #include <stdarg.h> |
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52 | |
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53 | /*-------------------------------------------------------------------------+ |
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54 | | Function: printNum |
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55 | | Description: print number in a given base. |
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56 | | Global Variables: None. |
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57 | | Arguments: num - number to print, base - base used to print the number. |
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58 | | Returns: Nothing. |
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59 | +--------------------------------------------------------------------------*/ |
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60 | static void printNum(long unsigned int num, int base, int sign, int width, |
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61 | int zerofill) { |
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62 | long unsigned int n; |
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63 | int count, negative = 0; |
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64 | char toPrint[80]; |
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65 | char *digits = "0123456789ABCDEF"; |
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66 | |
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67 | if (width > sizeof(toPrint)) { |
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68 | width = sizeof(toPrint); |
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69 | } |
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70 | if ((sign == 1) && ((long) num < 0)) { |
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71 | negative = 1; |
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72 | num = -num; |
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73 | } |
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74 | |
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75 | count = 0; |
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76 | while ((n = num / base) > 0) { |
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77 | toPrint[count++] = digits[num - (n * base)]; |
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78 | num = n; |
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79 | } |
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80 | toPrint[count++] = digits[num]; |
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81 | if (count + negative < width) { |
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82 | /* this needs to be padded out to width */ |
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83 | if (zerofill) { |
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84 | while (count + negative < width) { |
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85 | toPrint[count++] = '0'; |
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86 | } |
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87 | if (negative) { |
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88 | toPrint[count++] = '-'; |
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89 | } |
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90 | } else { |
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91 | if (negative) { |
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92 | toPrint[count++] = '-'; |
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93 | } |
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94 | while (count < width) { |
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95 | toPrint[count++] = ' '; |
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96 | } |
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97 | } |
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98 | } else if (negative) { |
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99 | toPrint[count++] = '-'; |
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100 | } |
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101 | |
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102 | for (n = 0; n < count; n++) { |
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103 | outbyte(toPrint[count - (n + 1)]); |
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104 | } |
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105 | } |
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106 | |
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107 | |
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108 | /*-------------------------------------------------------------------------+ |
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109 | | Function: printk |
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110 | | Description: a simplified version of printf intended for use when the |
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111 | console is not yet initialized or in ISR's. |
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112 | | Global Variables: None. |
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113 | | Arguments: as in printf: fmt - format string, ... - unnamed arguments. |
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114 | | Returns: Nothing. |
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115 | +--------------------------------------------------------------------------*/ |
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116 | int printk_enabled = 1; |
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117 | |
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118 | void printk(char *fmt, ...) { |
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119 | va_list ap; /* points to each unnamed argument in turn */ |
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120 | char c, *str; |
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121 | int lflag, base, sign, width, zero; |
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122 | |
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123 | /* disable interrupts??? */ |
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124 | |
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125 | if (printk_enabled) { |
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126 | va_start(ap, fmt); /* make ap point to 1st unnamed arg */ |
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127 | for (; *fmt != '\0'; fmt++) { |
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128 | lflag = 0; |
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129 | base = 0; |
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130 | sign = 0; |
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131 | width = 0; |
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132 | if (*fmt == '\n') { |
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133 | outbyte('\r'); |
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134 | } |
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135 | if (*fmt == '%') { |
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136 | c = *++fmt; |
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137 | if (c == '0') { |
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138 | zero = 1; |
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139 | c = *++fmt; |
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140 | } else { |
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141 | zero = 0; |
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142 | } |
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143 | for (; c >= '0' && c <= '9'; c = *++fmt) { |
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144 | width = width * 10 + (c - '0'); |
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145 | } |
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146 | if (c == 'l') { |
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147 | lflag = 1; |
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148 | c = *++fmt; |
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149 | } |
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150 | switch (c) { |
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151 | case 'o': |
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152 | case 'O': |
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153 | base = 8; |
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154 | sign = 0; |
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155 | break; |
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156 | case 'd': |
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157 | case 'D': |
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158 | base = 10; |
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159 | sign = 1; |
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160 | break; |
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161 | case 'u': |
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162 | case 'U': |
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163 | base = 10; |
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164 | sign = 0; |
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165 | break; |
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166 | case 'x': |
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167 | case 'X': |
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168 | base = 16; |
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169 | sign = 0; |
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170 | break; |
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171 | case 's': |
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172 | for (str = va_arg(ap, char *); *str; str++) { |
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173 | outbyte(*str); |
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174 | width--; |
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175 | } |
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176 | while (width-- > 0) { |
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177 | outbyte(' '); |
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178 | } |
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179 | break; |
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180 | case 'c': |
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181 | outbyte(va_arg(ap, int)); |
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182 | break; |
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183 | default: |
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184 | outbyte(c); |
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185 | break; |
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186 | } |
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187 | |
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188 | if (base) { |
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189 | printNum(lflag ? va_arg(ap, long int) : |
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190 | (long int) va_arg(ap, int), base, sign, width, zero); |
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191 | } |
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192 | } else { |
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193 | outbyte(*fmt); |
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194 | } |
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195 | } |
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196 | va_end(ap); /* clean up when done */ |
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197 | /* enable interrupts??? */ |
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198 | } |
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199 | } |
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