1 | ; Project name : XTIDE Universal BIOS |
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2 | ; Description : Equates for IDE registers, flags and commands. |
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3 | %ifndef IDEREGISTERS_INC |
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4 | %define IDEREGISTERS_INC |
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5 | |
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6 | ; IDE Register offsets from Command Block base port |
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7 | DATA_REGISTER EQU 0 |
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8 | ERROR_REGISTER_in EQU 1 ; Read only |
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9 | FEATURES_REGISTER_out EQU 1 ; Write only, ATA1+ |
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10 | ;WRITE_PRECOMPENSATION_out EQU 1 ; Write only, Obsolete on ATA1+ |
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11 | SECTOR_COUNT_REGISTER EQU 2 |
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12 | SECTOR_NUMBER_REGISTER EQU 3 ; LBA Low Register |
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13 | LOW_CYLINDER_REGISTER EQU 4 ; LBA Middle Register |
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14 | HIGH_CYLINDER_REGISTER EQU 5 ; LBA High Register |
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15 | LBA_LOW_REGISTER EQU 3 ; LBA 7...0, LBA48 31...24 |
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16 | LBA_MIDDLE_REGISTER EQU 4 ; LBA 15...8, LBA48 39...32 |
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17 | LBA_HIGH_REGISTER EQU 5 ; LBA 23...16, LBA48 47...40 |
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18 | DRIVE_AND_HEAD_SELECT_REGISTER EQU 6 ; LBA28 27...24 |
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19 | STATUS_REGISTER_in EQU 7 ; Read only |
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20 | COMMAND_REGISTER_out EQU 7 ; Write only |
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21 | XTIDE_DATA_HIGH_REGISTER EQU 8 ; Non-standard (actually first Control Block reg) |
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22 | |
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23 | ; IDE Register offsets from Control Block base port |
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24 | ; (usually Command Block base port + 200h) |
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25 | ALTERNATE_STATUS_REGISTER_in EQU 6 ; Read only |
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26 | DEVICE_CONTROL_REGISTER_out EQU 6 ; Write only |
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27 | ;DRIVE_ADDRESS_REGISTER EQU 7 ; Obsolete on ATA2+ |
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28 | |
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29 | ; Bit mask for XTIDE mod with reversed A0 and A3 address lines |
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30 | MASK_A3_AND_A0_ADDRESS_LINES EQU ((1<<3) | (1<<0)) |
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31 | |
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32 | ; Bit definitions for IDE Error Register |
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33 | FLG_ERROR_BBK EQU (1<<7) ; Bad Block Detected (reserved on ATA2+, command dependent on ATA4+) |
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34 | FLG_ERROR_UNC EQU (1<<6) ; Uncorrectable Data Error (command dependent on ATA4+) |
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35 | FLG_ERROR_MC EQU (1<<5) ; Media Changed (command dependent on ATA4+) |
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36 | FLG_ERROR_IDNF EQU (1<<4) ; ID Not Found (command dependent on ATA4+) |
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37 | FLG_ERROR_MCR EQU (1<<3) ; Media Change Request (command dependent on ATA4+) |
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38 | FLG_ERROR_ABRT EQU (1<<2) ; Command Aborted |
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39 | FLG_ERROR_TK0NF EQU (1<<1) ; Track 0 Not Found (command dependent on ATA4+) |
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40 | FLG_ERROR_AMNF EQU (1<<0) ; Address Mark Not Found (command dependent on ATA4+) |
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41 | |
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42 | ; Bit definitions for IDE Drive and Head Select Register |
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43 | FLG_DRVNHEAD_LBA EQU (1<<6) ; LBA Addressing enabled (instead of CHS) |
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44 | FLG_DRVNHEAD_DRV EQU (1<<4) ; Drive Select (0=Master, 1=Slave) |
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45 | MASK_DRVNHEAD_HEAD EQU 0Fh ; Head select bits (bits 0...3) |
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46 | MASK_DRVNHEAD_SET EQU 0A0h ; Bits that must be set to 1 on ATA1 (reserved on ATA2+) |
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47 | |
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48 | ; Bit definitions for IDE Status Register |
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49 | FLG_STATUS_BSY EQU (1<<7) ; Busy (other flags undefined when set) |
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50 | FLG_STATUS_DRDY EQU (1<<6) ; Device Ready |
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51 | FLG_STATUS_DF EQU (1<<5) ; Device Fault (command dependent on ATA4+) |
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52 | FLG_STATUS_DSC EQU (1<<4) ; Device Seek Complete (command dependent on ATA4+) |
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53 | FLG_STATUS_DRQ EQU (1<<3) ; Data Request |
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54 | FLG_STATUS_CORR EQU (1<<2) ; Corrected Data (obsolete on ATA4+) |
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55 | FLG_STATUS_IDX EQU (1<<1) ; Index (vendor specific on ATA2+, obsolete on ATA4+) |
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56 | FLG_STATUS_ERR EQU (1<<0) ; Error |
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57 | |
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58 | ; Bit definitions for IDE Device Control Register |
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59 | ; Bit 0 must be zero, unlisted bits are reserved. |
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60 | FLG_DEVCONTROL_HOB EQU (1<<7) ; High Order Byte (ATA6+) |
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61 | ;FLG_DEVCONTROL_O8H EQU (1<<3) ; Drive has more than 8 heads (pre-ATA only, 1 on ATA1, reserved on ATA2+) |
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62 | FLG_DEVCONTROL_SRST EQU (1<<2) ; Software Reset |
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63 | FLG_DEVCONTROL_nIEN EQU (1<<1) ; Negated Interrupt Enable (IRQ disabled when set) |
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64 | |
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65 | ; Commands for IDE Controller |
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66 | COMMAND_READ_SECTORS EQU 20h |
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67 | COMMAND_READ_SECTORS_EXT EQU 24h ; LBA48 |
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68 | COMMAND_WRITE_SECTORS EQU 30h |
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69 | COMMAND_WRITE_SECTORS_EXT EQU 34h ; LBA48 |
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70 | COMMAND_VERIFY_SECTORS EQU 40h |
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71 | COMMAND_VERIFY_SECTORS_EXT EQU 42h ; LBA48 |
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72 | COMMAND_SEEK EQU 70h |
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73 | COMMAND_INITIALIZE_DEVICE_PARAMETERS EQU 91h |
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74 | COMMAND_SET_MULTIPLE_MODE EQU 0C6h ; Block mode |
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75 | COMMAND_READ_MULTIPLE EQU 0C4h ; Block mode |
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76 | COMMAND_READ_MULTIPLE_EXT EQU 29h ; LBA48, Block mode |
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77 | COMMAND_WRITE_MULTIPLE EQU 0C5h ; Block mode |
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78 | COMMAND_WRITE_MULTIPLE_EXT EQU 39h ; LBA48, Block mode |
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79 | COMMAND_IDENTIFY_DEVICE EQU 0ECh |
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80 | COMMAND_SET_FEATURES EQU 0EFh |
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81 | |
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82 | |
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83 | %endif ; IDEREGISTERS_INC |
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