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annotate packages/hal/mips/vrc4373/current/src/plf_misc.c @ 92:08ffab08d2ee ecos-sw-2000-05-26

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Merge from eCos master repository on 2000-05-26-07:47:03-BST
author jlarmour
date Fri, 26 May 2000 13:46:34 +0000
parents 435cced73e2f
children
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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 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): nickg
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35 // Contributors: nickg, jlarmour
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36 // Date: 1999-01-21
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37 // Purpose: HAL miscellaneous functions
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38 // Description: This file contains miscellaneous functions provided by the
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39 // HAL.
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40 //
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41 //####DESCRIPTIONEND####
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42 //
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43 //========================================================================*/
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44
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45 #include <pkgconf/hal.h>
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46
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47 #include <cyg/infra/cyg_type.h> // Base types
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48 #include <cyg/infra/cyg_trac.h> // tracing macros
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49 #include <cyg/infra/cyg_ass.h> // assertion macros
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50
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51 #include <cyg/hal/hal_arch.h> // architectural definitions
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52
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53 #include <cyg/hal/hal_intr.h> // Interrupt handling
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54
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55 #include <cyg/hal/hal_cache.h> // Cache handling
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56
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57 #include <cyg/hal/plf_z8530.h>
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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 #if defined(CYGFUN_HAL_COMMON_KERNEL_SUPPORT) && \
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64 (defined(CYGSEM_HAL_USE_ROM_MONITOR_CygMon) || \
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65 defined(CYGSEM_HAL_USE_ROM_MONITOR_GDB_stubs))
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66
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67 {
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68 extern CYG_ADDRESS hal_virtual_vector_table[32];
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69 void patch_dbg_syscalls( void * );
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70 patch_dbg_syscalls( (void *)(&hal_virtual_vector_table[0]) );
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71 }
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72 #endif
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73 }
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74
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75 /*------------------------------------------------------------------------*/
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76 /* Functions to support the detection and execution of a user provoked */
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77 /* program break. These are usually called from interrupt routines. */
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78
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79 cyg_bool cyg_hal_is_break(char *buf, int size)
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80 {
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81 while( size )
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82 if( buf[--size] == 0x03 ) return true;
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83
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84 return false;
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85 }
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86
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87 void cyg_hal_user_break( CYG_ADDRWORD *regs )
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88 {
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89 #if defined(CYGSEM_HAL_USE_ROM_MONITOR_GDB_stubs)
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90 // The following code should be at the very start of this function so
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91 // that it can access the RA register before it is saved and reused.
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92 register CYG_WORD32 ra;
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93 asm volatile ( "move %0,$31;" : "=r" (ra) );
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94
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95 {
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96 extern CYG_ADDRESS hal_virtual_vector_table[64];
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97 typedef void install_bpt_fn(void *epc);
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98 CYG_WORD32 pc;
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99 HAL_SavedRegisters *sreg = (HAL_SavedRegisters *)regs;
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100 install_bpt_fn *ibp = (install_bpt_fn *)hal_virtual_vector_table[35];
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101
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102 if( regs == NULL ) pc = ra;
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103 else pc = sreg->pc;
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104
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105 if( ibp != NULL ) ibp((void *)pc);
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106 }
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107
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108 #elif defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
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109
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110 {
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111 extern void breakpoint(void);
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112 breakpoint();
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113 }
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114
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115 #else
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116
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117 HAL_BREAKPOINT(breakinst);
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118
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119 #endif
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120
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121 }
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122
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123 /*------------------------------------------------------------------------*/
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124 /* Control C ISR support */
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125
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126 #if defined(CYGDBG_HAL_MIPS_DEBUG_GDB_CTRLC_SUPPORT)
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127
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128 #if CYGHWR_HAL_MIPS_VR4300_VRC4373_GDB_PORT == 0
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129 #define DUART_CHAN DUART_A
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130 #else
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131 #define DUART_CHAN DUART_B
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132 #endif
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133
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134 struct Hal_SavedRegisters *hal_saved_interrupt_state;
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135
92
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136 void hal_ctrlc_isr_init(void)
76
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137 {
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138 HAL_DUART_WRITE_CR( DUART_CHAN, 1, 0x10 );
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139 HAL_DUART_WRITE_CR( DUART_CHAN, 9, 0x0a );
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140 HAL_INTERRUPT_SET_LEVEL( CYGHWR_HAL_GDB_PORT_VECTOR, 0 );
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141 HAL_INTERRUPT_UNMASK( CYGHWR_HAL_GDB_PORT_VECTOR );
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142 }
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143
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144 cyg_uint32 hal_ctrlc_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
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145 {
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146
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147 char c;
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148 cyg_uint8 rr0;
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149
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150 HAL_INTERRUPT_ACKNOWLEDGE( CYGHWR_HAL_GDB_PORT_VECTOR );
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151 HAL_DUART_READ_CR(DUART_CHAN, 0, rr0 );
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152
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153 // The following return value prevents a spurious interrupt report.
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154 // That is what should happen, but for some reason we get the odd extra
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155 // character when running in the test farm.
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156
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157 if ( (rr0 & 0x01) == 0 ) return 2;
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158
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159 HAL_DUART_READ_RR( DUART_CHAN, c );
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160
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161 if( cyg_hal_is_break( &c , 1 ) )
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162 cyg_hal_user_break( (CYG_ADDRWORD *)hal_saved_interrupt_state );
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163
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164 return 2;
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165 }
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166
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167 #endif
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168
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169 /*------------------------------------------------------------------------*/
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170 /* End of plf_misc.c */