[19ca797] | 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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