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Rev | Author | Line No. | Line |
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129 | mikedld | 1 | hd_phys_read: |
2 | ;eax - sector number |
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3 | ;ebx - destination |
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4 | pushad |
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5 | call wait_for_hd_idle |
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6 | popad |
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7 | push edx |
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8 | push eax |
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9 | cli |
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10 | xor eax,eax |
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11 | mov edx,[hdbase] |
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12 | inc edx |
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13 | out dx,al |
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14 | inc edx |
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15 | inc eax |
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16 | out dx,al |
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17 | inc edx |
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18 | ;write sector number. |
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19 | mov eax,[esp] |
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20 | out dx,al |
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21 | shr eax,8 |
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22 | inc edx |
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23 | out dx,al |
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24 | shr eax,8 |
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25 | inc edx |
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26 | out dx,al |
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27 | shr eax,8 |
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28 | inc edx |
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29 | and al,1+2+4+8 |
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30 | add al,byte [hdid] ;+0 or +16 |
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31 | or al,32+64+128 |
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32 | out dx,al |
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33 | inc edx |
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34 | mov al,0x20 |
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35 | out dx,al |
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36 | sti |
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37 | |||
38 | call wait_for_sector_buffer |
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39 | cmp [hd_error],0 |
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40 | jnz hd_read_error |
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41 | cli |
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42 | push edi |
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43 | mov edi,ebx |
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44 | mov ecx,256 |
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45 | mov edx,[hdbase] |
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46 | cld |
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47 | rep insw |
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48 | pop edi |
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49 | sti |
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50 | pop edx |
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51 | pop eax |
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52 | ret |
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53 | |||
54 | hd_phys_write: |
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55 | ;eax - sector number |
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56 | ;ebx - destination |
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57 | cmp eax,[partition_start] |
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58 | jb .ret |
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59 | cmp eax,[partition_end] |
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60 | ja .ret |
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61 | pushad |
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62 | call wait_for_hd_idle |
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63 | popad |
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64 | push edx |
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65 | push eax |
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66 | cli |
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67 | xor eax,eax |
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68 | mov edx,[hdbase] |
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69 | inc edx |
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70 | out dx,al |
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71 | inc edx |
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72 | inc eax |
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73 | out dx,al |
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74 | ;write sector number |
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75 | inc edx |
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76 | mov eax,[esp] |
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77 | out dx,al |
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78 | shr eax,8 |
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79 | inc edx |
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80 | out dx,al |
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81 | shr eax,8 |
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82 | inc edx |
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83 | out dx,al |
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84 | shr eax,8 |
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85 | inc edx |
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86 | and al,1+2+4+8 |
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87 | add al,byte [hdid] ;+0 or +16 |
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88 | or al,32+64+128 |
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89 | out dx,al |
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90 | |||
91 | inc edx |
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92 | mov al,0x30 |
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93 | out dx,al |
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94 | sti |
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95 | |||
96 | call wait_for_sector_buffer |
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97 | cmp [hd_error],0 |
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98 | jnz hd_write_error |
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99 | cli |
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100 | push esi |
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101 | mov esi,ebx |
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102 | mov ecx,256 |
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103 | mov edx,[hdbase] |
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104 | cld |
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105 | rep outsw |
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106 | pop esi |
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107 | sti |
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108 | pop edx |
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109 | pop eax |
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110 | .ret: |
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111 | ret |