1 | ; Project name : XTIDE Universal BIOS |
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2 | ; Description : Common functions for initializing different |
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3 | ; VLB and PCI IDE Controllers. |
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4 | |
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5 | ; |
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6 | ; XTIDE Universal BIOS and Associated Tools |
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7 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team. |
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8 | ; |
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9 | ; This program is free software; you can redistribute it and/or modify |
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10 | ; it under the terms of the GNU General Public License as published by |
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11 | ; the Free Software Foundation; either version 2 of the License, or |
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12 | ; (at your option) any later version. |
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13 | ; |
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14 | ; This program is distributed in the hope that it will be useful, |
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15 | ; but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 | ; GNU General Public License for more details. |
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18 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
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19 | ; |
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20 | |
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21 | ; Section containing code |
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22 | SECTION .text |
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23 | |
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24 | ;-------------------------------------------------------------------- |
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25 | ; AdvAtaInit_DetectControllerForIdeBaseInBX |
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26 | ; Parameters: |
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27 | ; BX: IDE Controller base port |
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28 | ; Returns: |
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29 | ; AX: ID WORD specific for detected controller |
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30 | ; Zero if no controller detected |
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31 | ; DX: Controller base port (not IDE) |
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32 | ; CF: Set if controller detected |
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33 | ; Cleared if no controller |
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34 | ; Corrupts registers: |
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35 | ; BX |
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36 | ;-------------------------------------------------------------------- |
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37 | AdvAtaInit_DetectControllerForIdeBaseInBX: |
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38 | call Vision_DetectAndReturnIDinAXandPortInDXifControllerPresent |
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39 | jne SHORT .NoAdvancedControllerForPortBX |
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40 | call Vision_DoesIdePortInBXbelongToControllerWithIDinAX |
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41 | jne SHORT .NoAdvancedControllerForPortBX |
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42 | |
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43 | stc ; Advanced Controller found for port BX |
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44 | ret |
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45 | |
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46 | .NoAdvancedControllerForPortBX: |
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47 | xor ax, ax |
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48 | ret |
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49 | |
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50 | |
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51 | ;-------------------------------------------------------------------- |
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52 | ; AdvAtaInit_GetControllerMaxPioModeToALandMinPioCycleTimeToBX |
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53 | ; Parameters: |
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54 | ; AX: ID WORD specific for detected controller |
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55 | ; Returns: |
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56 | ; AL: Max supported PIO mode |
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57 | ; AH: FLGH_DPT_IORDY if IORDY supported, zero otherwise |
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58 | ; BX: Min PIO cycle time (only if CF set) |
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59 | ; CF: Set if PIO limit necessary |
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60 | ; Cleared if no need to limit timings |
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61 | ; Corrupts registers: |
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62 | ; (AX if CF cleared) |
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63 | ;-------------------------------------------------------------------- |
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64 | AdvAtaInit_GetControllerMaxPioModeToALandMinPioCycleTimeToBX equ Vision_GetMaxPioModeToALandMinCycleTimeToBX |
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65 | |
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66 | |
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67 | ;-------------------------------------------------------------------- |
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68 | ; AdvAtaInit_InitializeControllerForDPTinDSDI |
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69 | ; Parameters: |
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70 | ; DS:DI: Ptr to DPT for Single or Slave Drive |
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71 | ; Returns: |
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72 | ; AH: Int 13h return status |
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73 | ; CF: Cleared if success or no controller to initialize |
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74 | ; Set if error |
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75 | ; Corrupts registers: |
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76 | ; AL, BX, CX, DX |
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77 | ;-------------------------------------------------------------------- |
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78 | AdvAtaInit_InitializeControllerForDPTinDSDI: |
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79 | ; Call Controller Specific initialization function |
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80 | mov ax, [di+DPT_ADVANCED_ATA.wControllerID] |
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81 | test ax, ax |
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82 | jz SHORT .NoAdvancedController ; Return with CF cleared |
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83 | |
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84 | push bp |
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85 | push si |
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86 | |
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87 | ; We only support Vision at the moment so no need to identify ID |
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88 | call AdvAtaInit_LoadMasterDPTtoDSSIifSlaveInDSDI |
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89 | call Vision_InitializeWithIDinAHandConfigInAL |
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90 | |
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91 | pop si |
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92 | pop bp |
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93 | |
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94 | .NoAdvancedController: |
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95 | xor ax, ax ; Success |
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96 | ret |
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97 | |
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98 | |
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99 | ;-------------------------------------------------------------------- |
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100 | ; AdvAtaInit_LoadMasterDPTtoDSSIifSlaveInDSDI |
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101 | ; Parameters: |
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102 | ; DS:DI: Ptr to DPT for Single or Slave Drive |
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103 | ; Returns: |
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104 | ; SI: Offset to Master DPT if Slave Drive present |
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105 | ; Zero if Slave Drive not present |
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106 | ; Corrupts registers: |
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107 | ; AX |
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108 | ;-------------------------------------------------------------------- |
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109 | AdvAtaInit_LoadMasterDPTtoDSSIifSlaveInDSDI: |
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110 | ; Must be Slave Drive if previous DPT has same IDEVARS offset |
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111 | lea si, [di-LARGEST_DPT_SIZE] ; DS:SI points to previous DPT |
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112 | mov al, [di+DPT.bIdevarsOffset] |
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113 | cmp al, [si+DPT.bIdevarsOffset] |
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114 | je SHORT .MasterAndSlaveDrivePresent |
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115 | |
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116 | ; We only have single drive so zero SI |
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117 | xor si, si |
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118 | .MasterAndSlaveDrivePresent: |
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119 | ret |
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120 | |
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121 | |
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122 | ;-------------------------------------------------------------------- |
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123 | ; AdvAtaInit_SelectSlowestCommonPioTimingsToBXandCXfromDSSIandDSDI |
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124 | ; Parameters: |
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125 | ; DS:DI: Ptr to DPT for Single or Slave Drive |
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126 | ; SI: Offset to Master DPT if Slave Drive present |
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127 | ; Zero if Slave Drive not present |
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128 | ; Returns: |
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129 | ; BX: Best common PIO mode |
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130 | ; CX: Slowest common PIO Cycle Time in nanosecs |
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131 | ; Corrupts registers: |
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132 | ; Nothing |
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133 | ;-------------------------------------------------------------------- |
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134 | AdvAtaInit_SelectSlowestCommonPioTimingsToBXandCXfromDSSIandDSDI: |
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135 | eMOVZX bx, [di+DPT_ADVANCED_ATA.bPioMode] |
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136 | mov cx, [di+DPT_ADVANCED_ATA.wMinPioCycleTime] |
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137 | test si, si |
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138 | jz SHORT .PioTimingsLoadedToAXandCX |
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139 | MIN_U bl, [si+DPT_ADVANCED_ATA.bPioMode] |
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140 | MAX_U cx, [si+DPT_ADVANCED_ATA.wMinPioCycleTime] |
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141 | .PioTimingsLoadedToAXandCX: |
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142 | ret |
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