1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup bsp_start |
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5 | * |
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6 | * @brief System low level start. |
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7 | */ |
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8 | |
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9 | /* |
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10 | * Copyright (c) 2008-2013 embedded brains GmbH. All rights reserved. |
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11 | * |
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12 | * embedded brains GmbH |
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13 | * Obere Lagerstr. 30 |
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14 | * 82178 Puchheim |
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15 | * Germany |
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16 | * <rtems@embedded-brains.de> |
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17 | * |
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18 | * The license and distribution terms for this file may be |
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19 | * found in the file LICENSE in this distribution or at |
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20 | * http://www.rtems.com/license/LICENSE. |
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21 | */ |
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22 | |
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23 | #ifndef LIBBSP_ARM_SHARED_START_H |
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24 | #define LIBBSP_ARM_SHARED_START_H |
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25 | |
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26 | #include <string.h> |
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27 | |
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28 | #include <bsp/linker-symbols.h> |
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29 | |
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30 | #ifdef __cplusplus |
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31 | extern "C" { |
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32 | #endif /* __cplusplus */ |
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33 | |
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34 | /** |
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35 | * @defgroup bsp_start System Start |
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36 | * |
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37 | * @ingroup bsp_kit |
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38 | * |
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39 | * @brief System low level start. |
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40 | * |
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41 | * @{ |
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42 | */ |
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43 | |
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44 | #define BSP_START_TEXT_SECTION __attribute__((section(".bsp_start_text"))) |
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45 | |
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46 | #define BSP_START_DATA_SECTION __attribute__((section(".bsp_start_data"))) |
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47 | |
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48 | /** |
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49 | * @brief System start entry. |
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50 | */ |
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51 | void _start(void); |
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52 | |
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53 | /** |
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54 | * @brief Start entry hook 0. |
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55 | * |
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56 | * This hook will be called from the start entry code after all modes and |
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57 | * stack pointers are initialized but before the copying of the exception |
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58 | * vectors. |
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59 | */ |
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60 | void bsp_start_hook_0(void); |
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61 | |
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62 | /** |
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63 | * @brief Start entry hook 1. |
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64 | * |
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65 | * This hook will be called from the start entry code after copying of the |
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66 | * exception vectors but before the call to boot_card(). |
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67 | */ |
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68 | void bsp_start_hook_1(void); |
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69 | |
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70 | /** |
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71 | * @brief Similar to standard memcpy(). |
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72 | * |
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73 | * The memory areas must be word aligned. Copy code will be executed from the |
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74 | * stack. If @a dest equals @a src nothing will be copied. |
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75 | */ |
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76 | void bsp_start_memcpy(int *dest, const int *src, size_t n); |
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77 | |
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78 | /** |
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79 | * @brief ARM entry point to bsp_start_memcpy(). |
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80 | */ |
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81 | void bsp_start_memcpy_arm(int *dest, const int *src, size_t n); |
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82 | |
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83 | /** |
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84 | * @brief Copies all standard sections from the load to the runtime area. |
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85 | */ |
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86 | BSP_START_TEXT_SECTION static inline void bsp_start_copy_sections(void) |
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87 | { |
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88 | /* Copy .text section */ |
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89 | bsp_start_memcpy( |
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90 | (int *) bsp_section_text_begin, |
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91 | (const int *) bsp_section_text_load_begin, |
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92 | (size_t) bsp_section_text_size |
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93 | ); |
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94 | |
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95 | /* Copy .rodata section */ |
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96 | bsp_start_memcpy( |
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97 | (int *) bsp_section_rodata_begin, |
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98 | (const int *) bsp_section_rodata_load_begin, |
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99 | (size_t) bsp_section_rodata_size |
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100 | ); |
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101 | |
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102 | /* Copy .data section */ |
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103 | bsp_start_memcpy( |
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104 | (int *) bsp_section_data_begin, |
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105 | (const int *) bsp_section_data_load_begin, |
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106 | (size_t) bsp_section_data_size |
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107 | ); |
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108 | |
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109 | /* Copy .fast_text section */ |
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110 | bsp_start_memcpy( |
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111 | (int *) bsp_section_fast_text_begin, |
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112 | (const int *) bsp_section_fast_text_load_begin, |
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113 | (size_t) bsp_section_fast_text_size |
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114 | ); |
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115 | |
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116 | /* Copy .fast_data section */ |
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117 | bsp_start_memcpy( |
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118 | (int *) bsp_section_fast_data_begin, |
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119 | (const int *) bsp_section_fast_data_load_begin, |
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120 | (size_t) bsp_section_fast_data_size |
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121 | ); |
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122 | } |
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123 | |
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124 | BSP_START_TEXT_SECTION static inline void bsp_start_clear_bss(void) |
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125 | { |
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126 | memset(bsp_section_bss_begin, 0, (size_t) bsp_section_bss_size); |
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127 | } |
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128 | |
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129 | /** @} */ |
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130 | |
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131 | #ifdef __cplusplus |
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132 | } |
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133 | #endif /* __cplusplus */ |
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134 | |
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135 | #endif /* LIBBSP_ARM_SHARED_START_H */ |
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