1 | /* macros.inc |
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2 | * |
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3 | * This file assists the board independent startup code |
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4 | * by initializing the chip-select channels to |
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5 | * reflect the proper memory configuration. |
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6 | * |
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7 | * NOTE: No stack has been established when this routine |
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8 | * is invoked. It returns to start.s through ldsegs |
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9 | * |
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10 | * Submitted by: |
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11 | * |
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12 | * Erik Ivanenko |
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13 | * University of Toronto |
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14 | * erik.ivanenko@utoronto.ca |
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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.OARcorp.com/rtems/license.html. |
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19 | * |
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20 | * $Id$ |
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21 | */ |
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22 | |
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23 | .set GDT_CODE_PTR , 0x08 |
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24 | .set GDT_DATA_PTR , 0x10 |
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25 | |
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26 | .set BOARD_SELECT , 0x301 |
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27 | .set BOARD_DATA , 0x302 |
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28 | .set BOARD_LATCH , 0x303 |
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29 | |
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30 | |
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31 | #define SetExRegByte(_register,_value) \ |
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32 | movb $ ## _value, al; \ |
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33 | movw $ ## _register, dx; \ |
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34 | outb al, dx |
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35 | |
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36 | #define SetExRegWord(_register,_value) \ |
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37 | movw $ ## _value, ax; \ |
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38 | movw $ ## _register, dx ; \ |
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39 | outw ax, dx |
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40 | |
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41 | |
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42 | #define DESC2(lim_0_15, bas_0_15, bas_16_23, access, gran, bas_24_31) \ |
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43 | .word lim_0_15 ; \ |
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44 | .word bas_0_15 ; \ |
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45 | .byte bas_16_23 ; \ |
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46 | .byte access ; \ |
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47 | .byte gran ; \ |
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48 | .byte bas_24_31 |
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49 | |
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50 | #define DESC3( _base, _limit) \ |
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51 | .word _limit ; \ |
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52 | .long _base |
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53 | |
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54 | /* THE GET_ACCESS IS CHANGED FROM 8E TO 9E */ |
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55 | |
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56 | #define INTERRUPT_GATE( _vector ) \ |
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57 | .word _vector ; \ |
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58 | .word GDT_CODE_PTR ; \ |
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59 | .byte 0x0 ; \ |
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60 | .byte 0x8E ; \ |
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61 | .word 0x0 |
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62 | |
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63 | #define rLOAD_INDEX( _selector, _segment_register) \ |
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64 | movl _selector , _segment_register ; \ |
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65 | addb al, ( eax ) |
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66 | |
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67 | #define rLOAD_SEGMENT( _reg, _segment_register) \ |
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68 | mov _reg , _segment_register ; \ |
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69 | |
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70 | /* #define rLOAD_SEGMENT( _reg, _segment_register) \ |
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71 | .code16 ; \ |
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72 | mov _reg , _segment_register ; \ |
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73 | .code32 |
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74 | */ |
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75 | #define pLOAD_SEGMENT( _selector, _segment_register) \ |
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76 | movl $ ## _selector , eax ; .code16 ; \ |
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77 | mov ax, _segment_register ; .code32 |
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78 | |
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79 | /* #define MOVE_WORD( _immed32, _reg ) \ |
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80 | data16 ; \ |
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81 | movl _immed32, _reg |
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82 | */ |
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83 | |
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84 | #define MOVE_WORD( _immed32, _reg ) \ |
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85 | movw _immed32, _reg |
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86 | |
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87 | /* #define MOVE_IMMED_WORD( _immed32, _reg ) \ |
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88 | data16 ; \ |
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89 | mov $ ## _immed32, _reg |
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90 | |
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91 | #define CS_OFF( _cs_symbol, _reg ) \ |
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92 | data16 ; \ |
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93 | mov _cs_symbol, _reg ; \ |
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94 | data16 ;\ |
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95 | andl $0x000ffff, _reg |
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96 | |
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97 | #define _16_NOPS \ |
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98 | nop ; \ |
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99 | nop ; \ |
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100 | nop ; \ |
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101 | nop ; \ |
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102 | nop ; \ |
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103 | nop ; \ |
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104 | nop ; \ |
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105 | nop ; \ |
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106 | nop ; \ |
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107 | nop ; \ |
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108 | nop ; \ |
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109 | nop ; \ |
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110 | nop ; \ |
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111 | nop ; \ |
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112 | nop ; \ |
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113 | nop ; |
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114 | */ |
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115 | |
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