1 | ; Project name : XTIDE Universal BIOS |
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2 | ; Description : Functions for accessing ATA information read with |
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3 | ; IDENTIFY DEVICE command. |
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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, 2011-2012 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 | %ifdef MODULE_ADVANCED_ATA |
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25 | ;-------------------------------------------------------------------- |
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26 | ; AtaID_GetMaxPioModeToAXandMinCycleTimeToCX |
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27 | ; Parameters: |
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28 | ; ES:SI: Ptr to 512-byte ATA information read from the drive |
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29 | ; Returns: |
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30 | ; AL: Max supported PIO mode |
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31 | ; AH: FLGH_DPT_IORDY if IORDY supported, zero otherwise |
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32 | ; CX: Minimum Cycle Time in nanosecs |
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33 | ; Corrupts registers: |
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34 | ; BX |
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35 | ;-------------------------------------------------------------------- |
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36 | AtaID_GetMaxPioModeToAXandMinCycleTimeToCX: |
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37 | ; Get PIO mode and cycle time for PIO 0...2 |
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38 | mov bx, [es:si+ATA1.bPioMode] |
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39 | mov ax, bx ; AH = 0, AL = PIO mode 0, 1 or 2 |
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40 | shl bx, 1 ; Shift for WORD lookup |
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41 | mov cx, [cs:bx+.rgwPio0to2CycleTimeInNanosecs] |
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42 | |
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43 | ; Check if IORDY is supported |
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44 | test BYTE [es:si+ATA2.wCaps+1], A2_wCaps_IORDY >> 8 |
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45 | jz SHORT .ReturnPioTimings ; No PIO 3 or higher if no IORDY |
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46 | mov ah, FLGH_DPT_IORDY |
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47 | |
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48 | ; Check if Advanced PIO modes are supported (3 and above) |
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49 | test BYTE [es:si+ATA2.wFields], A2_wFields_64to70 |
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50 | jz SHORT .ReturnPioTimings |
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51 | |
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52 | ; Get Advanced PIO mode |
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53 | ; (Hard Disks supports up to 4 but CF cards can support 5 and 6) |
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54 | mov bl, [es:si+ATA2.bPIOSupp] |
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55 | .CheckNextFlag: |
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56 | inc ax |
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57 | shr bl, 1 |
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58 | jnz SHORT .CheckNextFlag |
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59 | MIN_U al, 6 ; Make sure not above lookup tables |
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60 | mov cx, [es:si+ATA2.wPIOMinCyF] ; Advanced modes use IORDY |
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61 | .ReturnPioTimings: |
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62 | ret |
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63 | |
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64 | .rgwPio0to2CycleTimeInNanosecs: |
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65 | dw PIO_0_MIN_CYCLE_TIME_NS |
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66 | dw PIO_1_MIN_CYCLE_TIME_NS |
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67 | dw PIO_2_MIN_CYCLE_TIME_NS |
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68 | |
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69 | |
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70 | ;-------------------------------------------------------------------- |
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71 | ; AtaID_GetRecoveryTimeToAXfromPioModeInBXandCycleTimeInCX |
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72 | ; Parameters: |
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73 | ; BX: PIO Mode |
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74 | ; CX: PIO Cycle Time in nanosecs |
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75 | ; Returns: |
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76 | ; AX: Active Time in nanosecs |
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77 | ; Corrupts registers: |
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78 | ; BX, CX |
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79 | ;-------------------------------------------------------------------- |
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80 | AtaID_GetRecoveryTimeToAXfromPioModeInBXandCycleTimeInCX: |
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81 | call AtaID_GetActiveTimeToAXfromPioModeInBX |
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82 | mov bl, [cs:bx+.rgbPioModeToAddressValidTimeNs] |
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83 | sub cx, bx ; Cycle Time (t0) - Address Valid Time (t1) |
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84 | sub cx, ax ; - Active Time (t2) |
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85 | xchg ax, cx ; AX = Recovery Time (t2i) |
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86 | ret |
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87 | |
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88 | .rgbPioModeToAddressValidTimeNs: |
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89 | db PIO_0_MIN_ADDRESS_VALID_NS |
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90 | db PIO_1_MIN_ADDRESS_VALID_NS |
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91 | db PIO_2_MIN_ADDRESS_VALID_NS |
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92 | db PIO_3_MIN_ADDRESS_VALID_NS |
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93 | db PIO_4_MIN_ADDRESS_VALID_NS |
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94 | db PIO_5_MIN_ADDRESS_VALID_NS |
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95 | db PIO_6_MIN_ADDRESS_VALID_NS |
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96 | |
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97 | |
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98 | ;-------------------------------------------------------------------- |
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99 | ; AtaID_GetActiveTimeToAXfromPioModeInBX |
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100 | ; Parameters: |
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101 | ; BX: PIO Mode |
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102 | ; Returns: |
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103 | ; AX: Active Time in nanosecs |
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104 | ; Corrupts registers: |
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105 | ; Nothing |
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106 | ;-------------------------------------------------------------------- |
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107 | AtaID_GetActiveTimeToAXfromPioModeInBX: |
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108 | shl bx, 1 |
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109 | mov ax, [cs:bx+.rgwPioModeToActiveTimeNs] |
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110 | shr bx, 1 |
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111 | ret |
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112 | |
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113 | .rgwPioModeToActiveTimeNs: |
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114 | dw PIO_0_MIN_ACTIVE_TIME_NS |
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115 | dw PIO_1_MIN_ACTIVE_TIME_NS |
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116 | dw PIO_2_MIN_ACTIVE_TIME_NS |
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117 | dw PIO_3_MIN_ACTIVE_TIME_NS |
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118 | dw PIO_4_MIN_ACTIVE_TIME_NS |
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119 | dw PIO_5_MIN_ACTIVE_TIME_NS |
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120 | dw PIO_6_MIN_ACTIVE_TIME_NS |
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121 | |
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122 | %endif ; MODULE_ADVANCED_ATA |
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