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annotate packages/hal/mips/jmr3904/current/src/plf_misc.c @ 18:7253dcc42a09 ecos-sw-1999-06-25

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Merge from eCos master repository on 1999-06-25-15:31:50-BST
author jlarmour
date Fri, 25 Jun 1999 08:28:05 +0000
parents d3fbcdfa1b2f
children 29bc183297e1
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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 defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT)
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91 {
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92 void hal_ctrlc_isr_init(void);
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93 hal_ctrlc_isr_init();
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94 }
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95
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96 #endif
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97
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98 #if defined(CYGFUN_HAL_COMMON_KERNEL_SUPPORT) && \
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99 defined(CYG_HAL_USE_ROM_MONITOR) && \
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100 defined(CYG_HAL_USE_ROM_MONITOR_CYGMON)
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101 {
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102 patch_dbg_syscalls( (void *)(&hal_vsr_table[0]) );
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103 }
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104 #endif
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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 /* Functions to support the detection and execution of a user provoked */
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110 /* program break. These are usually called from interrupt routines. */
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111
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112 cyg_bool cyg_hal_is_break(char *buf, int size)
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113 {
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114 while( size )
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115 if( buf[--size] == 0x03 ) return true;
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116
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117 return false;
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118 }
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119
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120 void cyg_hal_user_break( CYG_ADDRWORD *regs )
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121 {
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122 #if defined(CYG_HAL_USE_ROM_MONITOR) && defined(CYG_HAL_USE_ROM_MONITOR_CYGMON)
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123 // The following code should be at the very start of this function so
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124 // that it can access the RA register before it is saved and reused.
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125 register CYG_WORD32 ra;
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126 asm volatile ( "move %0,$31;" : "=r" (ra) );
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127 #endif
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128
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129 #if defined(CYG_HAL_USE_ROM_MONITOR) && defined(CYG_HAL_USE_ROM_MONITOR_CYGMON)
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130
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131 {
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132 typedef void install_bpt_fn(void *epc);
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133 CYG_WORD32 pc;
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134 HAL_SavedRegisters *sreg = (HAL_SavedRegisters *)regs;
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135 install_bpt_fn *ibp = (install_bpt_fn *)hal_vsr_table[35];
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136
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137 if( regs == NULL ) pc = ra;
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138 else pc = sreg->pc;
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139
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140 if( ibp != NULL ) ibp((void *)pc);
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141 }
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142
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143 #elif defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
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144
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145 {
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146 extern void breakpoint(void);
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147 breakpoint();
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148 }
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149
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150 #else
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151
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152 HAL_BREAKPOINT(breakinst);
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153
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154 #endif
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155
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156 }
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157
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158 /*------------------------------------------------------------------------*/
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159 /* Control C ISR support */
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160
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161 #if defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT)
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162
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163 #define DIAG_BASE 0xfffff300
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164 #define DIAG_SLCR (DIAG_BASE+0x00)
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165 #define DIAG_SLSR (DIAG_BASE+0x04)
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166 #define DIAG_SLDICR (DIAG_BASE+0x08)
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167 #define DIAG_SLDISR (DIAG_BASE+0x0C)
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168 #define DIAG_SFCR (DIAG_BASE+0x10)
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169 #define DIAG_SBRG (DIAG_BASE+0x14)
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170 #define DIAG_TFIFO (DIAG_BASE+0x20)
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171 #define DIAG_RFIFO (DIAG_BASE+0x30)
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172
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173 #define BRG_T0 0x0000
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174 #define BRG_T2 0x0100
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175 #define BRG_T4 0x0200
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176 #define BRG_T5 0x0300
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177
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178 struct Hal_SavedRegisters *hal_saved_interrupt_state;
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179
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180 void hal_ctrlc_isr_init(void)
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181 {
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182 CYG_WORD16 dicr;
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183
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184 HAL_READ_UINT16( DIAG_SLDICR , dicr );
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185 dicr = 0x0001;
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186 HAL_WRITE_UINT16( DIAG_SLDICR , dicr );
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187
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188 HAL_INTERRUPT_SET_LEVEL( CYGHWR_HAL_GDB_PORT_VECTOR, 1 );
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189 HAL_INTERRUPT_UNMASK( CYGHWR_HAL_GDB_PORT_VECTOR );
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190 }
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191
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192 cyg_uint32 hal_ctrlc_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
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193 {
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194 char c;
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195 CYG_WORD16 disr;
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196
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197 HAL_INTERRUPT_ACKNOWLEDGE( CYGHWR_HAL_GDB_PORT_VECTOR );
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198
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199 HAL_READ_UINT16( DIAG_SLDISR , disr );
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200
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201 if( disr & 0x0001 )
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202 {
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203
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204 disr = disr & ~0x0001;
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205
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206 HAL_READ_UINT8( DIAG_RFIFO, c );
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207
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208 HAL_WRITE_UINT16( DIAG_SLDISR , disr );
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209
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210 if( cyg_hal_is_break( &c , 1 ) )
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211 cyg_hal_user_break( (CYG_ADDRWORD *)hal_saved_interrupt_state );
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212 }
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213
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214 return 2;
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215 }
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216
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217 #endif
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218
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219 /*------------------------------------------------------------------------*/
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220 /* End of plf_misc.c */