1 | /* |
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2 | * This is where the real hardware setup is done. A minimal stack |
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3 | * has been provided by the start.S code. No normal C or RTEMS |
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4 | * functions can be called from here. |
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5 | */ |
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6 | |
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7 | #include <stdint.h> |
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8 | |
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9 | extern void _wr_vbr(uint32_t); |
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10 | extern void init_main(void); |
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11 | extern int boot_card(int, char **, char **); |
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12 | |
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13 | /* |
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14 | * From linkcmds |
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15 | */ |
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16 | |
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17 | extern uint8_t _VBR[]; |
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18 | extern uint8_t _INTERRUPT_VECTOR[]; |
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19 | |
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20 | extern uint8_t _clear_start[]; |
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21 | extern uint8_t _clear_end[]; |
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22 | |
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23 | extern uint8_t _data_src_start[]; |
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24 | extern uint8_t _data_dest_start[]; |
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25 | extern uint8_t _data_dest_end[]; |
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26 | |
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27 | void Init52235(void) |
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28 | { |
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29 | register uint32_t i; |
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30 | register uint32_t *dp, *sp; |
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31 | register uint8_t *dbp, *sbp; |
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32 | |
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33 | /* |
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34 | * Initialize the hardware |
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35 | */ |
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36 | init_main(); |
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37 | |
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38 | /* |
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39 | * Copy the vector table to RAM |
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40 | */ |
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41 | |
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42 | if (_VBR != _INTERRUPT_VECTOR) { |
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43 | sp = (uint32_t *) _INTERRUPT_VECTOR; |
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44 | dp = (uint32_t *) _VBR; |
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45 | for (i = 0; i < 256; i++) { |
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46 | *dp++ = *sp++; |
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47 | } |
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48 | } |
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49 | |
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50 | _wr_vbr((uint32_t) _VBR); |
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51 | |
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52 | /* |
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53 | * Move initialized data from ROM to RAM. |
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54 | */ |
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55 | if (_data_src_start != _data_dest_start) { |
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56 | dbp = (uint8_t *) _data_dest_start; |
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57 | sbp = (uint8_t *) _data_src_start; |
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58 | i = _data_dest_end - _data_dest_start; |
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59 | while (i--) |
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60 | *dbp++ = *sbp++; |
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61 | } |
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62 | |
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63 | /* |
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64 | * Zero uninitialized data |
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65 | */ |
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66 | |
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67 | if (_clear_start != _clear_end) { |
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68 | sbp = _clear_start; |
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69 | dbp = _clear_end; |
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70 | i = dbp - sbp; |
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71 | while (i--) |
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72 | *sbp++ = 0; |
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73 | } |
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74 | |
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75 | /* |
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76 | * We have to call some kind of RTEMS function here! |
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77 | */ |
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78 | |
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79 | boot_card(0, 0, 0); |
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80 | for (;;) ; |
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81 | } |
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