1 | /*-------------------------------------------------------------------------+ |
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2 | | bspstart.c v1.1 - PC386 BSP - 1997/08/07 |
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3 | +--------------------------------------------------------------------------+ |
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4 | | This file contains the PC386 BSP startup package. It includes application, |
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5 | | board, and monitor specific initialization and configuration. The generic CPU |
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6 | | dependent initialization has been performed before this routine is invoked. |
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7 | +--------------------------------------------------------------------------+ |
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8 | | (C) Copyright 1997 - |
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9 | | - NavIST Group - Real-Time Distributed Systems and Industrial Automation |
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10 | | |
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11 | | http://pandora.ist.utl.pt |
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12 | | |
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13 | | Instituto Superior Tecnico * Lisboa * PORTUGAL |
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14 | +--------------------------------------------------------------------------+ |
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15 | | Disclaimer: |
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16 | | |
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17 | | This file is provided "AS IS" without warranty of any kind, either |
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18 | | expressed or implied. |
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19 | +--------------------------------------------------------------------------+ |
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20 | | This code is based on: |
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21 | | bspstart.c,v 1.8 1996/05/28 13:12:40 joel Exp - go32 BSP |
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22 | | With the following copyright notice: |
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23 | | ************************************************************************** |
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24 | | * COPYRIGHT (c) 1989-1998. |
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25 | | * On-Line Applications Research Corporation (OAR). |
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26 | | * Copyright assigned to U.S. Government, 1994. |
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27 | | * |
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28 | | * The license and distribution terms for this file may be |
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29 | | * found in found in the file LICENSE in this distribution or at |
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30 | | * http://www.OARcorp.com/rtems/license.html. |
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31 | | ************************************************************************** |
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32 | | |
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33 | | $Id$ |
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34 | +--------------------------------------------------------------------------*/ |
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35 | |
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36 | |
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37 | #include <bsp.h> |
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38 | #include <libcsupport.h> |
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39 | #include <rtems/libio.h> |
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40 | #include <libcpu/cpuModel.h> |
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41 | |
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42 | /*-------------------------------------------------------------------------+ |
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43 | | Global Variables |
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44 | +--------------------------------------------------------------------------*/ |
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45 | extern rtems_unsigned32 _end; /* End of BSS. Defined in 'linkcmds'. */ |
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46 | extern rtems_unsigned32 _heap_size; /* Size of stack. Defined in 'start.s'. */ |
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47 | extern rtems_unsigned32 _stack_size; /* Size of heap. Defined in 'start.s'. */ |
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48 | |
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49 | rtems_unsigned32 rtemsFreeMemStart; |
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50 | /* Address of start of free memory - should be updated |
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51 | after creating new partitions or regions. */ |
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52 | |
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53 | /* The original BSP configuration table from the application and our copy of it |
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54 | with some changes. */ |
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55 | |
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56 | extern rtems_configuration_table Configuration; |
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57 | rtems_configuration_table BSP_Configuration; |
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58 | |
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59 | rtems_cpu_table Cpu_table; /* CPU configuration table. */ |
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60 | char *rtems_progname; /* Program name - from main(). */ |
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61 | |
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62 | extern void debugPollingGetChar(); |
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63 | |
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64 | /*-------------------------------------------------------------------------+ |
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65 | | External Prototypes |
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66 | +--------------------------------------------------------------------------*/ |
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67 | extern void _exit(int); /* define in exit.c */ |
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68 | void bsp_libc_init( void *, unsigned32, int ); |
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69 | void bsp_postdriver_hook(void); |
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70 | extern void rtems_irq_mngt_init(); |
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71 | |
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72 | /*-------------------------------------------------------------------------+ |
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73 | | Function: bsp_pretasking_hook |
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74 | | Description: BSP pretasking hook. Called just before drivers are |
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75 | | initialized. Used to setup libc and install any BSP |
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76 | | extensions. NOTE: Must not use libc (to do io) from here, |
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77 | | since drivers are not yet initialized. |
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78 | | Global Variables: None. |
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79 | | Arguments: None. |
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80 | | Returns: Nothing. |
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81 | +--------------------------------------------------------------------------*/ |
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82 | void bsp_pretasking_hook(void) |
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83 | { |
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84 | if (rtemsFreeMemStart & (CPU_ALIGNMENT - 1)) /* not aligned => align it */ |
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85 | rtemsFreeMemStart = (rtemsFreeMemStart+CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1); |
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86 | |
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87 | bsp_libc_init((void *)rtemsFreeMemStart, _heap_size, 0); |
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88 | rtemsFreeMemStart += _heap_size; /* HEAP_SIZE in KBytes */ |
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89 | |
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90 | |
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91 | #ifdef RTEMS_DEBUG |
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92 | |
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93 | rtems_debug_enable(RTEMS_DEBUG_ALL_MASK); |
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94 | |
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95 | #endif /* RTEMS_DEBUG */ |
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96 | } /* bsp_pretasking_hook */ |
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97 | |
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98 | |
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99 | /*-------------------------------------------------------------------------+ |
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100 | | Function: bsp_start |
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101 | | Description: Called before main is invoked. |
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102 | | Global Variables: None. |
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103 | | Arguments: None. |
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104 | | Returns: Nothing. |
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105 | +--------------------------------------------------------------------------*/ |
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106 | void bsp_start( void ) |
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107 | { |
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108 | rtemsFreeMemStart = (rtems_unsigned32)&_end + _heap_size + _stack_size; |
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109 | /* set the value of start of free memory. */ |
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110 | |
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111 | /* If we don't have command line arguments set default program name. */ |
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112 | |
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113 | Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */ |
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114 | Cpu_table.predriver_hook = NULL; /* use system's */ |
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115 | Cpu_table.postdriver_hook = bsp_postdriver_hook; |
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116 | Cpu_table.idle_task = NULL; |
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117 | /* do not override system IDLE task */ |
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118 | Cpu_table.do_zero_of_workspace = TRUE; |
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119 | Cpu_table.interrupt_table_segment = get_ds(); |
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120 | Cpu_table.interrupt_table_offset = (void *)Interrupt_descriptor_table; |
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121 | Cpu_table.interrupt_stack_size = 4096; |
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122 | Cpu_table.extra_mpci_receive_server_stack = 0; |
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123 | |
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124 | /* Place RTEMS workspace at beginning of free memory. */ |
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125 | |
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126 | if (rtemsFreeMemStart & (CPU_ALIGNMENT - 1)) /* not aligned => align it */ |
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127 | rtemsFreeMemStart = (rtemsFreeMemStart+CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1); |
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128 | |
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129 | BSP_Configuration.work_space_start = (void *)rtemsFreeMemStart; |
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130 | rtemsFreeMemStart += BSP_Configuration.work_space_size; |
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131 | |
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132 | console_reserve_resources(&BSP_Configuration); |
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133 | |
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134 | /* |
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135 | * Init rtems_interrupt_management |
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136 | */ |
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137 | rtems_irq_mngt_init(); |
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138 | |
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139 | /* |
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140 | * The following information is very useful when debugging. |
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141 | */ |
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142 | |
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143 | #if 0 |
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144 | printk( "work_space_size = 0x%x\n", BSP_Configuration.work_space_size ); |
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145 | printk( "maximum_extensions = 0x%x\n", BSP_Configuration.maximum_extensions ); |
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146 | printk( "microseconds_per_tick = 0x%x\n", |
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147 | BSP_Configuration.microseconds_per_tick ); |
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148 | printk( "ticks_per_timeslice = 0x%x\n", |
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149 | BSP_Configuration.ticks_per_timeslice ); |
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150 | printk( "maximum_devices = 0x%x\n", BSP_Configuration.maximum_devices ); |
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151 | printk( "number_of_device_drivers = 0x%x\n", |
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152 | BSP_Configuration.number_of_device_drivers ); |
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153 | printk( "Device_driver_table = 0x%x\n", |
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154 | BSP_Configuration.Device_driver_table ); |
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155 | |
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156 | printk( "_heap_size = 0x%x\n", _heap_size ); |
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157 | printk( "_stack_size = 0x%x\n", _stack_size ); |
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158 | printk( "rtemsFreeMemStart = 0x%x\n", rtemsFreeMemStart ); |
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159 | printk( "work_space_start = 0x%x\n", BSP_Configuration.work_space_start ); |
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160 | printk( "work_space_size = 0x%x\n", BSP_Configuration.work_space_size ); |
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161 | #endif |
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162 | } /* bsp_start */ |
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