Mercurial > ecos-v3_0-branch

annotate packages/hal/sparclite/arch/current/src/hal_boot.c @ 66:bf00f99aec69 ecos-sw-2000-02-02

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Merge from eCos master repository on 2000-02-02-19:16:44-GMT
author jlarmour
date Wed, 02 Feb 2000 19:57:02 +0000
parents c38311975d4f
children da3908c9cd10
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1 //==========================================================================
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2 //
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3 // hal_boot.c
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4 //
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5 // SPARClite Architecture specific interrupt dispatch tables
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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: 1998-12-10
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37 // Purpose: Interrupt handler tables for SPARClite.
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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 #include <cyg/infra/cyg_type.h>
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45
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46 /*------------------------------------------------------------------------*/
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47 /* calling this is our raison d'etre: */
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48 extern void cyg_start( void );
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49
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50 /*------------------------------------------------------------------------*/
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51 /* data copy and bss zero functions */
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52
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53 typedef void (CYG_ROM_ADDRESS)(void);
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54
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55 #ifdef CYG_HAL_STARTUP_ROM
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56 void hal_copy_data(void)
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57 {
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58 extern char __ram_data_start;
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59 extern char __ram_data_end;
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60 extern CYG_ROM_ADDRESS __rom_data_start;
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61 long *p = (long *)&__ram_data_start;
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62 long *q = (long *)&__rom_data_start;
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63
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64 while( p <= (long *)&__ram_data_end )
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65 *p++ = *q++;
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66 }
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67 #endif
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68
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69 void hal_zero_bss(void)
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70 {
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71 extern CYG_ROM_ADDRESS __bss_start;
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72 extern CYG_ROM_ADDRESS __bss_end;
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73
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74 register long long zero = 0;
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75 register long long *end = (long long *)&__bss_end;
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76 register long long *p = (long long *)&__bss_start;
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77
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78 while( p <= end )
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79 *p++ = zero;
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80 }
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81
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82 #ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
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83 cyg_bool cyg_hal_stop_constructors;
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84 #endif
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85
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86 void
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87 cyg_hal_invoke_constructors (void)
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88 {
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89 typedef void (*pfunc) (void);
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90 extern pfunc __CTOR_LIST__[];
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91 extern pfunc __CTOR_END__[];
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92
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93 #ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
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94 static pfunc *p = &__CTOR_END__[-1];
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95
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96 cyg_hal_stop_constructors = 0;
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97 for (; p >= __CTOR_LIST__; p--) {
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98 (*p) ();
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99 if (cyg_hal_stop_constructors) {
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100 p--;
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101 break;
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102 }
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103 }
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104 #else
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105 pfunc *p;
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106
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107 for (p = &__CTOR_END__[-1]; p >= __CTOR_LIST__; p--)
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108 (*p) ();
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109 #endif
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110 }
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111
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112 // Override any __gccmain the compiler might generate. We don't want
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113 // constructors to be called twice.
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114 void __gccmain(void) {}
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115
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116 /*------------------------------------------------------------------------*/
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117 /* CYG_HAL_START - pre-main-entrypoint */
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118
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119 #ifdef CYG_HAL_SPARCLITE_SLEB
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120 #define SLEB_LED (*(volatile char *)(0x02000003))
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121 #define LED( _x_ ) SLEB_LED = (char)(0xff & ~(_x_))
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122 #else
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123 #define LED( _x_ ) CYG_EMPTY_STATEMENT
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124 #endif
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125
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126 extern void hal_board_prestart( void );
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127 extern void hal_board_poststart( void );
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128
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129 // This is called with traps enabled, but interrupts masked out:
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130 // Be sure to enable them in hal_board_poststart() at the latest.
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131
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132 void cyg_hal_start( void )
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133 {
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134 /* Board specific prestart that's best done in C */
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135 hal_board_prestart();
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136
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137 LED( 0xd0 );
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138
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139 #ifdef CYG_HAL_STARTUP_ROM
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140 /* Copy data from ROM to RAM */
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141 hal_copy_data();
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142 #endif
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143
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144 LED( 0xd4 );
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145
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146 /* Zero BSS */
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147 hal_zero_bss();
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148
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149 LED( 0xd8 );
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150
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151 /* Call constructors */
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152 cyg_hal_invoke_constructors();
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153
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154 LED( 0xdc );
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155
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156 /* Board specific late startup that's best done in C */
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157 hal_board_poststart();
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158
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159 LED( 0xf8 );
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160
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161 /* Call cyg_start */
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162 cyg_start(); /* does not return */
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163 }
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164
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165 // EOF hal_boot.c