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annotate packages/hal/mn10300/stb/current/src/plf_misc.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
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children 4c750ce71ae3
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76
435cced73e2f eCos v1.3.1 merged from eCos master repository on 2000-03-27-23:22:51-BST
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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 /*------------------------------------------------------------------------*/
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58
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59 void hal_platform_init(void)
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60 {
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61 #if defined(CYG_HAL_STARTUP_ROM)
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62 // Note that the hardware seems to come up with the
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63 // caches containing random data. Hence they must be
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64 // invalidated before being enabled.
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65 // However, we only do this if we are in ROM. If we are
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66 // in RAM, then we leave the caches in the state chosen
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67 // by the ROM monitor. If we enable them when the monitor
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68 // is not expecting it, we can end up breaking things if the
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69 // monitor is not doing cache flushes.
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70
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71 HAL_ICACHE_INVALIDATE_ALL();
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72 HAL_ICACHE_ENABLE();
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73 HAL_DCACHE_INVALIDATE_ALL();
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74 HAL_DCACHE_ENABLE();
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75 #endif
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76
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77 #if defined(CYGPKG_KERNEL) && \
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78 defined(CYGFUN_HAL_COMMON_KERNEL_SUPPORT) && \
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79 defined(CYGSEM_HAL_USE_ROM_MONITOR_GDB_stubs)
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80 {
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81 extern CYG_ADDRESS hal_virtual_vector_table[32];
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82 extern void patch_dbg_syscalls(void * vector);
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83 patch_dbg_syscalls( (void *)(&hal_virtual_vector_table[0]) );
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84 }
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85 #endif
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86 #if defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT)
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87 {
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88 static void hal_ctrlc_isr_init(void);
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89 hal_ctrlc_isr_init();
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90 }
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91 #endif
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92 }
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93
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94 /*------------------------------------------------------------------------*/
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95 /* Functions to support the detection and execution of a user provoked */
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96 /* program break. These are usually called from interrupt routines. */
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97
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98 cyg_bool cyg_hal_is_break(char *buf, int size)
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99 {
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100 while( size )
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101 if( buf[--size] == 0x03 ) return true;
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102
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103 return false;
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104 }
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105
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106 void cyg_hal_user_break( CYG_ADDRWORD *regs )
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107 {
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108 #if defined(CYGSEM_HAL_USE_ROM_MONITOR_GDB_stubs)
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109
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110 {
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111 extern CYG_ADDRESS hal_virtual_vector_table[64];
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112 typedef void install_bpt_fn(void *pc);
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113 CYG_WORD32 retpc = ((CYG_WORD32 *)(&regs))[-1];
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114 CYG_WORD32 pc;
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115 HAL_SavedRegisters *sreg = (HAL_SavedRegisters *)regs;
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116 install_bpt_fn *ibp = (install_bpt_fn *)hal_virtual_vector_table[35];
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117
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118 if( regs == NULL ) pc = retpc;
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119 else pc = sreg->pc;
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120
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121 if( ibp != NULL ) ibp((void *)pc);
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122 }
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123
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124 #elif defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
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125
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126 {
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127 extern void breakpoint(void);
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128 breakpoint();
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129 }
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130
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131 #else
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132
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133 HAL_BREAKPOINT(breakinst);
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134
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135 #endif
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136 }
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137
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138 /*------------------------------------------------------------------------*/
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139 /* Control C ISR support */
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140
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141 #if defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT)
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142
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143 #if CYGHWR_HAL_MN10300_AM33_STB_GDB_PORT == 0
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144
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145 // We use serial0 on AM33
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146 #define SERIAL_CR ((volatile cyg_uint16 *)0xd4002000)
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147 #define SERIAL_ICR ((volatile cyg_uint8 *) 0xd4002004)
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148 #define SERIAL_TXR ((volatile cyg_uint8 *) 0xd4002008)
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149 #define SERIAL_RXR ((volatile cyg_uint8 *) 0xd4002009)
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150 #define SERIAL_SR ((volatile cyg_uint16 *)0xd400200c)
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151
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152 // Timer 1 provided baud rate divisor
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153 #define TIMER_MD ((volatile cyg_uint8 *)0xd4003000)
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154 #define TIMER_BR ((volatile cyg_uint8 *)0xd4003010)
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155 #define TIMER_CR ((volatile cyg_uint8 *)0xd4003020)
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156
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157 #define SIO_LSTAT_TRDY 0x20
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158 #define SIO_LSTAT_RRDY 0x10
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159
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160 #else
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161
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162 #error Unsupported GDB port
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163
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164 #endif
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165
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166 struct Hal_SavedRegisters *hal_saved_interrupt_state;
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167
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168 static void hal_ctrlc_isr_init(void)
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169 {
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170 // cyg_uint16 cr;
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171
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172 // HAL_READ_UINT16( SERIAL_CR, cr );
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173 // cr |= LCR_RXE;
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174 // HAL_WRITE_UINT16( SERIAL_CR, cr );
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175 HAL_INTERRUPT_SET_LEVEL( CYGHWR_HAL_GDB_PORT_VECTOR, 4 );
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176 HAL_INTERRUPT_UNMASK( CYGHWR_HAL_GDB_PORT_VECTOR );
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177 }
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178
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179 cyg_uint32 hal_ctrlc_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
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180 {
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181 char c;
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182 cyg_uint16 sr;
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183
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184 HAL_INTERRUPT_ACKNOWLEDGE( CYGHWR_HAL_GDB_PORT_VECTOR );
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185
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186 HAL_READ_UINT16( SERIAL_SR, sr );
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187
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188 if( sr & SIO_LSTAT_RRDY )
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189 {
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190 HAL_READ_UINT8( SERIAL_RXR, c);
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191
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192 if( cyg_hal_is_break( &c , 1 ) )
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193 cyg_hal_user_break( (CYG_ADDRWORD *)hal_saved_interrupt_state );
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194
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195
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196 }
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197 return 1;
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198 }
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199
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200 #endif
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201
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202 /*------------------------------------------------------------------------*/
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203 /* End of plf_misc.c */