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annotate packages/hal/powerpc/mbx/current/src/hal_diag.c @ 76:435cced73e2f ecos-v1_3_1-release

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eCos v1.3.1 merged from eCos master repository on 2000-03-27-23:22:51-BST
author jlarmour
date Tue, 28 Mar 2000 14:10:45 +0000
parents bf00f99aec69
children c37d3a9e1b28
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1 //=============================================================================
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2 //
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3 // hal_diag.c
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4 //
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5 // HAL diagnostic output code
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6 //
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7 //=============================================================================
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8 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.1 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://www.redhat.com/
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //=============================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): hmt
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35 // Contributors:hmt
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36 // Date: 1999-06-08
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37 // Purpose: HAL diagnostic output
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38 // Description: Implementations of HAL diagnostic output support.
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39 //
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40 //####DESCRIPTIONEND####
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41 //
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42 //=============================================================================
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43
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44 #include <pkgconf/hal.h>
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45
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46 #include <cyg/infra/cyg_type.h> // base types
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47 #include <cyg/infra/cyg_trac.h> // tracing macros
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48 #include <cyg/infra/cyg_ass.h> // assertion macros
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49
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50 #include <cyg/hal/hal_io.h> // IO macros
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51 #include <cyg/hal/hal_diag.h>
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52 #include <cyg/hal/hal_intr.h> // Interrupt macros
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53
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54 #if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
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55 #include <cyg/hal/hal_stub.h> // hal_output_gdb_string
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56 #endif
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57
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58 #include <cyg/hal/ppc_regs.h>
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59 #include <cyg/hal/quicc/quicc_smc1.h>
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60
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61 //-----------------------------------------------------------------------------
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62 // Select default diag channel to use
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63
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64 //#define CYG_KERNEL_DIAG_ROMART
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65 //#define CYG_KERNEL_DIAG_SERIAL
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66
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67 #if !defined(CYG_KERNEL_DIAG_SERIAL)
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68 #define CYG_KERNEL_DIAG_SERIAL
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69 #endif
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70
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71 #ifdef CYGDBG_DIAG_BUF
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72 // Keep diag messages in a buffer for later [re]display
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73
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74 int enable_diag_uart = 1;
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75 int enable_diag_buf = 1;
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76 static char diag_buf[40960*4];
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77 static int diag_buf_ptr = 0;
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79 static void
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80 diag_putc(char c)
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81 {
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82 if (enable_diag_buf) {
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83 diag_buf[diag_buf_ptr++] = c;
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84 if (diag_buf_ptr == sizeof(diag_buf)) diag_buf_ptr--;
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85 }
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86 }
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87
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88 void
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89 dump_diag_buf(int start, int len)
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90 {
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91 int i;
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92 enable_diag_uart = 1;
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93 enable_diag_buf = 0;
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94 if (len == 0) len = diag_buf_ptr;
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95 diag_printf("\nDiag buf\n");
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96 for (i = start; i < len; i++) {
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97 hal_diag_write_char(diag_buf[i]);
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98 }
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99 }
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100 #endif // CYGDBG_DIAG_BUF
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101
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102
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103 //-----------------------------------------------------------------------------
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104 // MBX board specific serial output; using GDB protocol by default:
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105
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106
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107 #if defined(CYG_KERNEL_DIAG_SERIAL)
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108
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109 void hal_diag_init(void)
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110 {
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111 static int init = 0;
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112 if (init) return;
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113 init++;
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114 // init the actual serial port
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115 cyg_quicc_init_smc1();
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116 #ifndef CYGDBG_HAL_DIAG_DISABLE_GDB_PROTOCOL
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117 #ifndef CYG_HAL_STARTUP_ROM
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118 // We are talking to GDB; ack the "go" packet!
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119 cyg_quicc_smc1_uart_putchar('+');
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120 #endif
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121 #endif
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122 }
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123
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124 void hal_diag_write_char_serial( char c )
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125 {
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126 unsigned long __state;
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127 HAL_DISABLE_INTERRUPTS(__state);
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128 cyg_quicc_smc1_uart_putchar(c);
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129 HAL_RESTORE_INTERRUPTS(__state);
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130 }
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131
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132 #if defined(CYG_HAL_STARTUP_ROM) || defined(CYGDBG_HAL_DIAG_DISABLE_GDB_PROTOCOL)
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133 void hal_diag_write_char(char c)
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134 {
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135 #ifdef CYGDBG_DIAG_BUF
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136 diag_putc(c);
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137 if (!enable_diag_uart) return;
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138 #endif // CYGDBG_DIAG_BUF
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139 hal_diag_write_char_serial(c);
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140 }
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141
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142 #else // RAM start so encode for GDB
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143
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144 void hal_diag_write_char(char c)
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145 {
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146 static char line[100];
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147 static int pos = 0;
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148
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149 #ifdef CYGDBG_DIAG_BUF
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150 diag_putc(c);
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151 if (!enable_diag_uart) return;
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152 #endif // CYGDBG_DIAG_BUF
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153
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154 // No need to send CRs
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155 if( c == '\r' ) return;
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156
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157 line[pos++] = c;
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158
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159 if( c == '\n' || pos == sizeof(line) )
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160 {
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161 CYG_INTERRUPT_STATE old;
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162
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163 // Disable interrupts. This prevents GDB trying to interrupt us
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164 // while we are in the middle of sending a packet. The serial
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165 // receive interrupt will be seen when we re-enable interrupts
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166 // later.
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167
48
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168 #ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
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169 CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION(old);
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170 #else
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171 HAL_DISABLE_INTERRUPTS(old);
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172 #endif
32
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173
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174 while(1)
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175 {
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176 static char hex[] = "0123456789ABCDEF";
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177 cyg_uint8 csum = 0;
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178 int i;
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179
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180 hal_diag_write_char_serial('$');
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181 hal_diag_write_char_serial('O');
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182 csum += 'O';
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183 for( i = 0; i < pos; i++ )
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184 {
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185 char ch = line[i];
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186 char h = hex[(ch>>4)&0xF];
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187 char l = hex[ch&0xF];
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188 hal_diag_write_char_serial(h);
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189 hal_diag_write_char_serial(l);
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190 csum += h;
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191 csum += l;
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192 }
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193 hal_diag_write_char_serial('#');
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194 hal_diag_write_char_serial(hex[(csum>>4)&0xF]);
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195 hal_diag_write_char_serial(hex[csum&0xF]);
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196
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197 #ifndef CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT
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198 // only gobble characters if no interrupt handler to grab ^Cs
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199 // is installed (which is exclusive with device driver use)
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200
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201 // Wait for the ACK character '+' from GDB here and handle
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202 // receiving a ^C instead. This is the reason for this clause
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203 // being a loop.
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204 c = cyg_quicc_smc1_uart_rcvchar();
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205
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206 if( c == '+' )
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207 break; // a good acknowledge
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208 #if 0
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209 if( c1 == 3 ) {
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210 // Ctrl-C: breakpoint.
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211 breakpoint();
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212 break;
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213 }
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214 #endif
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215 // otherwise, loop round again
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216 #else
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217 break;
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218 #endif
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219 }
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220
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221 pos = 0;
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222
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223 // And re-enable interrupts
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224 #ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
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225 CYG_HAL_GDB_LEAVE_CRITICAL_IO_REGION(old);
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226 #else
32
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227 HAL_RESTORE_INTERRUPTS(old);
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228 #endif
32
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229
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230 }
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231 }
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232 #endif // NOT def CYG_HAL_STARTUP_ROM
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233
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234
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235 void hal_diag_read_char(char *c)
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236 {
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237 *c = cyg_quicc_smc1_uart_rcvchar();
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238 }
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239
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240 #endif // CYG_KERNEL_DIAG_SERIAL
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241
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242 // EOF hal_diag.c