1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup powerpc_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) 2010 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.org/license/LICENSE. |
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21 | */ |
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22 | |
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23 | #ifndef LIBBSP_POWERPC_SHARED_START_H |
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24 | #define LIBBSP_POWERPC_SHARED_START_H |
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25 | |
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26 | #include <stddef.h> |
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27 | |
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28 | #ifdef __cplusplus |
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29 | extern "C" { |
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30 | #endif /* __cplusplus */ |
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31 | |
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32 | /** |
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33 | * @defgroup RTEMSBSPsPowerPCSharedStart PowerPC System Start |
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34 | * |
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35 | * @ingroup RTEMSBSPsPowerPCShared |
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36 | * |
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37 | * @brief PowerPC low level start. |
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38 | * |
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39 | * @{ |
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40 | */ |
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41 | |
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42 | #define BSP_START_TEXT_SECTION __attribute__((section(".bsp_start_text"))) |
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43 | |
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44 | #define BSP_START_DATA_SECTION __attribute__((section(".bsp_start_data"))) |
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45 | |
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46 | /** |
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47 | * @brief System start entry. |
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48 | */ |
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49 | void _start(void); |
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50 | |
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51 | /** |
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52 | * Zeros @a byte_count bytes starting at @a begin. |
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53 | * |
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54 | * It wraps around in case of an address overflow. The stack will not be used. |
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55 | * The code is position independent. It uses the data cache block zero |
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56 | * instruction in case the data cache is enabled. There are no alignment |
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57 | * constains for @a begin and @a byte_count. |
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58 | * |
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59 | * @see bsp_start_zero_begin, bsp_start_zero_end, and bsp_start_zero_size. |
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60 | */ |
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61 | void BSP_START_TEXT_SECTION bsp_start_zero(void *begin, size_t byte_count); |
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62 | |
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63 | /** |
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64 | * @brief Symbol which equals the bsp_start_zero() code begin. |
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65 | */ |
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66 | extern char bsp_start_zero_begin []; |
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67 | |
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68 | /** |
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69 | * @brief Symbol which equals the bsp_start_zero() code end. |
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70 | */ |
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71 | extern char bsp_start_zero_end []; |
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72 | |
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73 | /** |
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74 | * @brief Symbol which equals the bsp_start_zero() code size. |
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75 | */ |
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76 | extern char bsp_start_zero_size []; |
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77 | |
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78 | /** @} */ |
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79 | |
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80 | #ifdef __cplusplus |
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81 | } |
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82 | #endif /* __cplusplus */ |
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83 | |
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84 | #endif /* LIBBSP_POWERPC_SHARED_START_H */ |
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