1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup RTEMSBSPsSharedStartup |
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5 | */ |
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6 | |
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7 | /* |
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8 | * Copyright (c) 2008-2014 embedded brains GmbH. All rights reserved. |
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9 | * |
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10 | * embedded brains GmbH |
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11 | * Dornierstr. 4 |
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12 | * 82178 Puchheim |
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13 | * Germany |
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14 | * <rtems@embedded-brains.de> |
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15 | * |
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16 | * The license and distribution terms for this file may be |
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17 | * found in the file LICENSE in this distribution or at |
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18 | * http://www.rtems.org/license/LICENSE. |
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19 | */ |
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20 | |
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21 | #ifndef LIBBSP_SHARED_BOOTCARD_H |
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22 | #define LIBBSP_SHARED_BOOTCARD_H |
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23 | |
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24 | #include <string.h> |
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25 | |
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26 | #include <rtems/config.h> |
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27 | #include <rtems/bspIo.h> |
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28 | #include <rtems/malloc.h> |
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29 | #include <rtems/score/wkspace.h> |
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30 | |
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31 | #include <bspopts.h> |
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32 | |
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33 | #ifdef __cplusplus |
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34 | extern "C" { |
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35 | #endif /* __cplusplus */ |
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36 | |
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37 | /** |
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38 | * @defgroup RTEMSBSPsSharedStartup Bootcard |
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39 | * |
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40 | * @ingroup RTEMSBSPsShared |
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41 | * |
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42 | * @brief Standard system startup. |
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43 | * |
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44 | * @{ |
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45 | */ |
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46 | |
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47 | /** |
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48 | * @brief Global pointer to the command line of boot_card(). |
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49 | */ |
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50 | extern const char *bsp_boot_cmdline; |
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51 | |
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52 | void bsp_start(void); |
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53 | |
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54 | void bsp_reset(void); |
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55 | |
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56 | /** |
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57 | * @brief Standard system initialization procedure. |
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58 | * |
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59 | * You may pass a command line in @a cmdline. It is later available via the |
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60 | * global @ref bsp_boot_cmdline variable. |
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61 | * |
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62 | * This is the C entry point for ALL RTEMS BSPs. It is invoked from the |
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63 | * assembly language initialization file usually called @c start.S which does |
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64 | * the basic CPU setup (stack, C runtime environment, zero BSS, load other |
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65 | * sections) and calls afterwards boot_card(). The boot card function provides |
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66 | * the framework for the BSP initialization sequence. For the basic flow of |
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67 | * initialization see RTEMS C User's Guide, Initialization Manager. |
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68 | * |
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69 | * This style of initialization ensures that the C++ global constructors are |
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70 | * executed after RTEMS is initialized. |
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71 | */ |
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72 | void boot_card(const char *cmdline) RTEMS_NO_RETURN; |
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73 | |
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74 | #ifdef CONFIGURE_MALLOC_BSP_SUPPORTS_SBRK |
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75 | /** |
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76 | * @brief Gives the BSP a chance to reduce the work area size with sbrk() |
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77 | * adding more later. |
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78 | * |
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79 | * bsp_sbrk_init() may reduce the work area size passed in. The routine |
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80 | * returns the 'sbrk_amount' to be used when extending the heap. Note that |
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81 | * the return value may be zero. |
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82 | * |
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83 | * In case the @a area size is altered, then the remaining size of the |
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84 | * @a area must be greater than or equal to @a min_size. |
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85 | */ |
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86 | ptrdiff_t bsp_sbrk_init(Heap_Area *area, uintptr_t min_size); |
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87 | #endif |
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88 | |
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89 | static inline void bsp_work_area_initialize_default( |
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90 | void *area_begin, |
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91 | uintptr_t area_size |
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92 | ) |
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93 | { |
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94 | Heap_Area area = { |
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95 | .begin = area_begin, |
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96 | .size = area_size |
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97 | }; |
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98 | |
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99 | #if BSP_DIRTY_MEMORY == 1 |
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100 | memset(area.begin, 0xCF, area.size); |
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101 | #endif |
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102 | |
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103 | #ifdef CONFIGURE_MALLOC_BSP_SUPPORTS_SBRK |
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104 | { |
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105 | uintptr_t overhead = _Heap_Area_overhead(CPU_HEAP_ALIGNMENT); |
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106 | uintptr_t work_space_size = rtems_configuration_get_work_space_size(); |
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107 | ptrdiff_t sbrk_amount = bsp_sbrk_init( |
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108 | &area, |
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109 | work_space_size |
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110 | + overhead |
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111 | + (rtems_configuration_get_unified_work_area() ? 0 : overhead) |
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112 | ); |
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113 | |
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114 | rtems_heap_set_sbrk_amount(sbrk_amount); |
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115 | } |
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116 | #endif |
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117 | |
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118 | _Workspace_Handler_initialization(&area, 1, NULL); |
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119 | RTEMS_Malloc_Initialize(&area, 1, NULL); |
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120 | } |
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121 | |
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122 | static inline void bsp_work_area_initialize_with_table( |
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123 | Heap_Area *areas, |
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124 | size_t area_count |
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125 | ) |
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126 | { |
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127 | _Workspace_Handler_initialization(areas, area_count, _Heap_Extend); |
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128 | RTEMS_Malloc_Initialize(areas, area_count, _Heap_Extend); |
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129 | } |
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130 | |
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131 | void bsp_work_area_initialize(void); |
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132 | |
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133 | struct Per_CPU_Control; |
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134 | |
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135 | /** |
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136 | * @brief Standard start routine for secondary processors. |
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137 | * |
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138 | * This function is usually called by low-level startup code of secondary |
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139 | * processors or boot loaders starting a secondary processor. The final step |
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140 | * of this function is a call to |
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141 | * _SMP_Start_multitasking_on_secondary_processor(). |
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142 | */ |
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143 | void bsp_start_on_secondary_processor(struct Per_CPU_Control *cpu_self); |
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144 | |
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145 | /** @} */ |
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146 | |
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147 | #ifdef __cplusplus |
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148 | } |
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149 | #endif /* __cplusplus */ |
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150 | |
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151 | #endif /* LIBBSP_SHARED_BOOTCARD_H */ |
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