1 | ; Project name : XTIDE Universal BIOS |
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2 | ; Description : Defines for DPT structs containing custom |
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3 | ; Disk Parameter Table used by this BIOS. |
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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 | %ifndef CUSTOMDPT_INC |
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22 | %define CUSTOMDPT_INC |
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23 | |
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24 | ; Base DPT for all device types |
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25 | struc DPT |
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26 | ; General Disk Parameter Table related |
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27 | .wFlags: |
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28 | .bFlagsLow resb 1 |
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29 | .bFlagsHigh resb 1 |
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30 | .bIdevarsOffset resb 1 ; Offset to IDEVARS for this drive |
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31 | .bInitError resb 1 ; Flags for AH=09h initialization errors |
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32 | .wBasePort resb 2 ; Segment for JR-IDE/ISA |
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33 | |
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34 | ; CHS variables |
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35 | .wLchsCylinders resb 2 ; (1...1027, yes 1027) |
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36 | .wLchsHeadsAndSectors: |
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37 | .bLchsHeads resb 1 ; (1...255) |
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38 | .bLchsSectorsPerTrack resb 1 ; (1...63) |
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39 | .bPchsHeads resb 1 ; (1...16) |
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40 | |
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41 | ; LBA and remaining P-CHS variables |
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42 | %ifdef MODULE_EBIOS |
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43 | .bPchsSectorsPerTrack resb 1 |
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44 | .wPchsCylinders resb 2 |
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45 | .twLbaSectors resb 6 ; 48-bit sector count for LBA addressing |
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46 | %endif |
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47 | alignb 2 ; WORD alignment for DPT_SERIAL or DPT_ATA |
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48 | endstruc |
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49 | |
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50 | ; Bit definitions for DPT.bFlagsLow |
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51 | MASKL_DPT_CHS_SHIFT_COUNT EQU (3<<0) ; Bits 0...1, P-CHS to L-CHS bit shift count (0...3) |
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52 | MASKL_DPT_TRANSLATEMODE EQU MASK_DRVPARAMS_TRANSLATEMODE ; Bits 2...3, NORMAL, LARGE or Assisted LBA addressing mode |
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53 | FLGL_DPT_ASSISTED_LBA EQU (1<<(TRANSLATEMODE_FIELD_POSITION+1)) |
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54 | FLGL_DPT_SLAVE EQU FLG_DRVNHEAD_DRV ; Bit 4, Drive is a Slave Drive |
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55 | %ifdef MODULE_IRQ |
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56 | FLGL_DPT_ENABLE_IRQ EQU (1<<5) ; Bit 5, Enable IRQ |
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57 | %endif |
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58 | %ifdef MODULE_EBIOS |
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59 | FLGL_DPT_LBA_AND_EBIOS_SUPPORTED EQU FLG_DRVNHEAD_LBA ; Bit 6, Drive supports LBA and so EBIOS functions can be supported |
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60 | FLGL_DPT_LBA48 EQU (1<<7) ; Bit 7, Drive supports 48-bit LBA (Must be bit 7!) |
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61 | %endif |
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62 | |
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63 | |
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64 | ; Bit definitions for DPT.bFlagsHigh |
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65 | FLGH_DPT_BLOCK_MODE_SUPPORTED EQU (1<<1) ; Bit 1, Use block transfer commands (must be bit 1!) |
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66 | %ifdef MODULE_SERIAL |
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67 | FLGH_DPT_SERIAL_DEVICE EQU (1<<2) ; Bit 2, Serial Port Device |
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68 | %endif |
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69 | %ifdef MODULE_IRQ |
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70 | FLGH_DPT_INTERRUPT_IN_SERVICE EQU (1<<3) ; Bit 3, Set when waiting for IRQ |
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71 | %endif |
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72 | %ifdef MODULE_FEATURE_SETS |
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73 | FLGH_DPT_POWER_MANAGEMENT_SUPPORTED EQU (1<<5) ; Bit 5, Drive supports power management |
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74 | %endif |
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75 | %ifdef MODULE_ADVANCED_ATA |
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76 | FLGH_DPT_IORDY EQU (1<<7) ; Bit 7, Controller and Drive supports IORDY |
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77 | %endif |
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78 | |
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79 | ; Serial device only |
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80 | %ifdef MODULE_SERIAL_FLOPPY |
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81 | FLGH_DPT_SERIAL_FLOPPY EQU (1<<4) |
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82 | FLGH_DPT_SERIAL_FLOPPY_TYPE_MASK EQU 0e0h |
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83 | FLGH_DPT_SERIAL_FLOPPY_TYPE_FIELD_POSITION EQU 5 |
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84 | %endif |
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85 | |
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86 | |
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87 | ; Flags for DPT_ADVANCED_ATA.bInitError |
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88 | FLG_INITERROR_FAILED_TO_SELECT_DRIVE EQU (1<<0) |
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89 | FLG_INITERROR_FAILED_TO_INITIALIZE_CHS_PARAMETERS EQU (1<<1) |
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90 | FLG_INITERROR_FAILED_TO_SET_WRITE_CACHE EQU (1<<2) |
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91 | FLG_INITERROR_FAILED_TO_RECALIBRATE_DRIVE EQU (1<<3) |
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92 | FLG_INITERROR_FAILED_TO_SET_BLOCK_MODE EQU (1<<4) |
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93 | FLG_INITERROR_FAILED_TO_SET_PIO_MODE EQU (1<<5) |
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94 | FLG_INITERROR_FAILED_TO_INITIALIZE_STANDBY_TIMER EQU (1<<6) |
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95 | FLG_INITERROR_FAILED_TO_SET_XTCF_MODE EQU (1<<7) |
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96 | FLG_INITERROR_FAILED_TO_SET_8BIT_MODE EQU FLG_INITERROR_FAILED_TO_SET_XTCF_MODE |
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97 | |
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98 | |
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99 | |
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100 | ; DPT for ATA devices |
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101 | struc DPT_ATA |
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102 | .dpt resb DPT_size |
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103 | .bDevice resb 1 ; Device Type from IDEVARS (overrided when 32-bit controller detected) |
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104 | .bBlockSize resb 1 ; Current block size in sectors (do not set to zero!) |
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105 | endstruc |
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106 | |
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107 | |
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108 | |
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109 | ; Additional variables needed to initialize and reset Advanced IDE Controllers. |
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110 | ; EBDA must be reserved for DPTs when using these! |
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111 | %ifdef MODULE_ADVANCED_ATA |
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112 | struc DPT_ADVANCED_ATA |
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113 | .dpt_ata resb DPT_ATA_size |
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114 | .wControllerID resb 2 ; Controller specific ID WORD (from Advanced Controller detection) |
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115 | .wControllerBasePort resb 2 ; Advanced Controller port (not IDE port) |
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116 | .wMinPioCycleTime resb 2 ; Minimum PIO Cycle Time in ns |
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117 | .bPioMode resb 1 ; Best supported PIO mode |
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118 | alignb 2 |
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119 | endstruc |
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120 | %endif |
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121 | |
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122 | |
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123 | ; DPT for Serial devices |
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124 | %ifdef MODULE_SERIAL |
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125 | struc DPT_SERIAL |
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126 | .dpt resb DPT_size |
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127 | .wSerialPortAndBaud: |
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128 | .bSerialPort resb 1 ; Serial connection I/O port address, divided by 4 |
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129 | .bSerialBaud resb 1 ; Serial connection baud rate divisor |
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130 | endstruc |
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131 | |
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132 | ; On performance critical situations we compare DPT_ATA.bDevice without checking FLGH_DPT_SERIAL_DEVICE |
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133 | ; first! DPT_ATA.bDevice uses small values so there will be no problems. |
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134 | %ifndef CHECK_FOR_UNUSED_ENTRYPOINTS |
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135 | %if DPT_SERIAL.bSerialPort <> DPT_ATA.bDevice |
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136 | %error "DPT_ATA.bDevice and DPT_SERIAL.bSerialPort must be in same offsets!" |
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137 | %endif |
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138 | %endif |
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139 | %endif ; MODULE_SERIAL |
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140 | |
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141 | |
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142 | ; This is the common size for all DPTs. All DPTs must be equal size. |
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143 | %ifdef MODULE_ADVANCED_ATA |
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144 | LARGEST_DPT_SIZE EQU DPT_ADVANCED_ATA_size |
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145 | %else |
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146 | LARGEST_DPT_SIZE EQU DPT_ATA_size |
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147 | %endif |
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148 | |
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149 | |
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150 | ; Number of Sectors per Track is fixed to 63 for LBA assist calculation. |
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151 | ; 1024 cylinders, 256 heads, 63 sectors = 8.4 GB limit (but DOS does not support more than 255 heads) |
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152 | MAX_LCHS_CYLINDERS EQU 1024 |
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153 | LBA_ASSIST_SPT EQU 63 |
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154 | |
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155 | |
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156 | %endif ; CUSTOMDPT_INC |
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