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annotate packages/hal/mips/jmr3904/current/src/plf_misc.c @ 6:d376b777e2ce ecos-sw-1999-05-14

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Merge from eCos master repository on 1999-05-14-19:27:43-BST
author jlarmour
date Fri, 14 May 1999 12:20:00 +0000
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children d3fbcdfa1b2f
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1 //==========================================================================
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2 //
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3 // plf_misc.c
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4 //
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5 // HAL platform miscellaneous functions
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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 Cygnus eCos Public License
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12 // Version 1.0 (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://sourceware.cygnus.com/ecos
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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 Cygnus Operating System, released
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22 // September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Cygnus. Portions created
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25 // by Cygnus are Copyright (C) 1998,1999 Cygnus Solutions. All Rights Reserved.
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26 // -------------------------------------------
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27 //
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28 //####COPYRIGHTEND####
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29 //==========================================================================
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30 //#####DESCRIPTIONBEGIN####
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31 //
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32 // Author(s): nickg
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33 // Contributors: nickg, jlarmour
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34 // Date: 1999-01-21
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35 // Purpose: HAL miscellaneous functions
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36 // Description: This file contains miscellaneous functions provided by the
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37 // HAL.
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38 //
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39 //####DESCRIPTIONEND####
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40 //
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41 //========================================================================*/
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42
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43 #include <pkgconf/hal.h>
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44
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45 #include <cyg/infra/cyg_type.h> // Base types
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46 #include <cyg/infra/cyg_trac.h> // tracing macros
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47 #include <cyg/infra/cyg_ass.h> // assertion macros
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48
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49 #include <cyg/hal/hal_arch.h> // architectural definitions
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50
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51 #include <cyg/hal/hal_intr.h> // Interrupt handling
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52
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53 #include <cyg/hal/hal_cache.h> // Cache handling
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54
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55 /*------------------------------------------------------------------------*/
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56
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57 extern void patch_dbg_syscalls(void * vector);
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58
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59 /*------------------------------------------------------------------------*/
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60
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61 void hal_platform_init(void)
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62 {
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63 // On the real hardware we also enable the cache.
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64 // doing this here is a temporary measure until we
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65 // have a proper platform specific place to do it.
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66
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67 #if !defined(CYGHWR_HAL_TX39_JMR3904_ENABLE_TOE)
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68
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69 HAL_ICACHE_INVALIDATE_ALL();
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70 HAL_ICACHE_ENABLE();
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71 HAL_DCACHE_INVALIDATE_ALL();
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72 HAL_DCACHE_ENABLE();
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73
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74 HAL_TX39_DEBUG_TOE_DISABLE();
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75
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76 #else
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77
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78 // If TOE is enabled, caches are disabled by default
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79 // until spurious Bus Timeout problem is fixed.
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80
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81 HAL_ICACHE_INVALIDATE_ALL();
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82 HAL_ICACHE_DISABLE();
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83 HAL_DCACHE_INVALIDATE_ALL();
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84 HAL_DCACHE_DISABLE();
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85
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86 HAL_TX39_DEBUG_TOE_ENABLE();
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87
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88 #endif
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89
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90 #if 0
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91 #if defined(CYG_HAL_USE_ROM_MONITOR) && \
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92 !defined(CYGDBG_INFRA_DIAG_USE_DEVICE) && \
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93 defined(CYG_HAL_TX39_JMR3904)
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94
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95 {
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96 static void hal_init_ctrlc_intr(void);
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97 hal_init_ctrlc_intr();
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98 }
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99
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100 #endif
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101 #endif
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102
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103 #if defined(CYGFUN_HAL_COMMON_KERNEL_SUPPORT) && \
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104 defined(CYG_HAL_USE_ROM_MONITOR) && \
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105 defined(CYG_HAL_USE_ROM_MONITOR_CYGMON)
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106 {
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107 patch_dbg_syscalls( (void *)(&hal_vsr_table[0]) );
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108 }
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109 #endif
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110
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111 }
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112
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113 /*------------------------------------------------------------------------*/
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114 /* Functions to support the detection and execution of a user provoked */
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115 /* program break. These are usually called from interrupt routines. */
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116
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117 cyg_bool cyg_hal_is_break(char *buf, int size)
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118 {
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119 while( size )
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120 if( buf[--size] == 0x03 ) return true;
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121
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122 return false;
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123 }
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124
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125 void cyg_hal_user_break( CYG_ADDRWORD *regs )
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126 {
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127 #if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
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128
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129 // Ctrl-C: breakpoint.
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130 extern void breakpoint(void);
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131 breakpoint();
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132
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133 #elif defined(CYG_HAL_USE_ROM_MONITOR) && defined(CYG_HAL_USE_ROM_MONITOR_GDB_STUBS)
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134
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135 // Ctrl-C: breakpoint.
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136 typedef void bpt_fn(void);
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137 bpt_fn *bfn = ((bpt_fn **)0x80000100)[61];
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138 bfn();
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139
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140 #elif defined(CYG_HAL_USE_ROM_MONITOR) && defined(CYG_HAL_USE_ROM_MONITOR_CYGMON)
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141
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142 // Ctrl-C: breakpoint.
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143 typedef void install_bpt_fn(void *epc);
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144 HAL_SavedRegisters *sreg = (HAL_SavedRegisters *)regs;
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145 install_bpt_fn *ibp = (install_bpt_fn *)hal_vsr_table[35];
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146 if( ibp != NULL ) ibp((void *)sreg->pc);
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147
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148 #endif
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149
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150 }
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151
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152 /*------------------------------------------------------------------------*/
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153 /* This code installs an interrupt handler to capture Ctrl-C. */
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154
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155 #if 0
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156 #if defined(CYG_HAL_USE_ROM_MONITOR) && \
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157 !defined(CYGDBG_INFRA_DIAG_USE_DEVICE) && \
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158 defined(CYG_HAL_TX39_JMR3904)
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159
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160 #define DIAG_BASE 0xfffff300
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161 #define DIAG_SLCR (DIAG_BASE+0x00)
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162 #define DIAG_SLSR (DIAG_BASE+0x04)
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163 #define DIAG_SLDICR (DIAG_BASE+0x08)
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164 #define DIAG_SLDISR (DIAG_BASE+0x0C)
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165 #define DIAG_SFCR (DIAG_BASE+0x10)
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166 #define DIAG_SBRG (DIAG_BASE+0x14)
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167 #define DIAG_TFIFO (DIAG_BASE+0x20)
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168 #define DIAG_RFIFO (DIAG_BASE+0x30)
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169
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170 #define BRG_T0 0x0000
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171 #define BRG_T2 0x0100
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172 #define BRG_T4 0x0200
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173 #define BRG_T5 0x0300
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174
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175 static cyg_uint32 hal_ctrlc_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data, CYG_ADDRWORD regs)
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176 {
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177 char c;
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178 CYG_WORD16 disr;
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179
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180 HAL_READ_UINT16( DIAG_SLDISR , disr );
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181
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182 if( disr & 0x0001 )
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183 {
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184
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185 disr = disr & ~0x0001;
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186
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187 HAL_READ_UINT8( DIAG_RFIFO, c );
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188
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189 HAL_WRITE_UINT16( DIAG_SLDISR , disr );
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190
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191 if( cyg_hal_is_break( &c , 1 ) )
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192 cyg_hal_user_break( regs );
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193 }
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194
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195 return 0;
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196 }
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197
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198
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199 static void hal_init_ctrlc_intr(void)
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200 {
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201 CYG_WORD16 dicr;
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202
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203 HAL_INTERRUPT_ATTACH( CYGNUM_HAL_INTERRUPT_SIO_0, hal_ctrlc_isr, NULL,
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204 NULL );
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205
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206 HAL_INTERRUPT_UNMASK( CYGNUM_HAL_INTERRUPT_SIO_0 );
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207
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208 HAL_READ_UINT16( DIAG_SLDICR , dicr );
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209 dicr = 0x0001;
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210 HAL_WRITE_UINT16( DIAG_SLDICR , dicr );
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211 }
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212
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213 #endif
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214 #endif
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215
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216 /*------------------------------------------------------------------------*/
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217 /* End of plf_misc.c */