source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Device/Device.asm @ 193

Last change on this file since 193 was 181, checked in by krille_n_@…, 13 years ago

Changes to all parts of the project:

  • Size optimizations.
  • Added a define (EXCLUDE_FROM_XTIDECFG) to exclude unused library code from XTIDECFG.
  • Tried to minimize time spent with interrupts disabled.
  • Some minor attempts to improve speed (reordering instructions etc).
  • Tried to improve readability, did some cleanup and fixed some errors in comments.
File size: 4.1 KB
RevLine 
[150]1; Project name  :   XTIDE Universal BIOS
2; Description   :   Command and port direction functions for different device types.
3
4; Section containing code
5SECTION .text
6
7;--------------------------------------------------------------------
8; Device_FinalizeDPT
9;   Parameters:
10;       DS:DI:  Ptr to Disk Parameter Table
11;       ES:SI:  Ptr to 512-byte ATA information read from the drive
[160]12;       CS:BP:  Ptr to IDEVARS for the controller
[150]13;   Returns:
14;       Nothing
15;   Corrupts registers:
16;       AX, BX, CX, DX
17;--------------------------------------------------------------------
[181]18%ifdef MODULE_SERIAL
[150]19Device_FinalizeDPT:
[158]20    test    BYTE [di+DPT.bFlagsHigh], FLGH_DPT_SERIAL_DEVICE
[175]21    jnz     SHORT .FinalizeDptForSerialPortDevice
[150]22    jmp     IdeDPT_Finalize
[181]23
[175]24.FinalizeDptForSerialPortDevice:
[181]25    jmp     SerialDPT_Finalize
26%else
27    Device_FinalizeDPT EQU IdeDPT_Finalize
[175]28%endif
[150]29
[181]30
[150]31;--------------------------------------------------------------------
32; Device_ResetMasterAndSlaveController
33;   Parameters:
34;       DS:DI:  Ptr to DPT (in RAMVARS segment)
35;   Returns:
36;       AH:     INT 13h Error Code
37;       CF:     Cleared if success, Set if error
38;   Corrupts registers:
39;       AL, BX, CX, DX
40;--------------------------------------------------------------------
[181]41%ifdef MODULE_SERIAL
[150]42Device_ResetMasterAndSlaveController:
[158]43    test    BYTE [di+DPT.bFlagsHigh], FLGH_DPT_SERIAL_DEVICE
[150]44    jnz     SHORT ReturnSuccessForSerialPort
[181]45    jmp     IdeCommand_ResetMasterAndSlaveController
46%else
47    Device_ResetMasterAndSlaveController EQU IdeCommand_ResetMasterAndSlaveController
[175]48%endif
[150]49
50
51;--------------------------------------------------------------------
52; Device_IdentifyToBufferInESSIwithDriveSelectByteInBH
53;   Parameters:
54;       BH:     Drive Select byte for Drive and Head Select Register
55;       DS:     Segment to RAMVARS
56;       ES:SI:  Ptr to buffer to receive 512-byte IDE Information
57;       CS:BP:  Ptr to IDEVARS
58;   Returns:
59;       AH:     INT 13h Error Code
60;       CF:     Cleared if success, Set if error
61;   Corrupts registers:
62;       AL, BL, CX, DX, SI, DI, ES
63;--------------------------------------------------------------------
[181]64%ifdef MODULE_SERIAL
[150]65Device_IdentifyToBufferInESSIwithDriveSelectByteInBH:
66    cmp     BYTE [cs:bp+IDEVARS.bDevice], DEVICE_SERIAL_PORT
67    je      SHORT .IdentifyDriveFromSerialPort
68    jmp     IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH
[181]69
[150]70.IdentifyDriveFromSerialPort:
71    jmp     SerialCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH
[181]72%else
73    Device_IdentifyToBufferInESSIwithDriveSelectByteInBH EQU IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH
[175]74%endif
[150]75
[181]76
[150]77;--------------------------------------------------------------------
78; Device_OutputCommandWithParameters
79;   Parameters:
80;       BH:     Default system timer ticks for timeout (can be ignored)
81;       BL:     IDE Status Register bit to poll after command
82;       ES:SI:  Ptr to buffer (for data transfer commands)
83;       DS:DI:  Ptr to DPT (in RAMVARS segment)
84;       SS:BP:  Ptr to IDEPACK
85;   Returns:
86;       AH:     INT 13h Error Code
87;       CF:     Cleared if success, Set if error
88;   Corrupts registers:
89;       AL, BX, CX, DX, (ES:SI for data transfer commands)
90;--------------------------------------------------------------------
[181]91%ifdef MODULE_SERIAL
[150]92ALIGN JUMP_ALIGN
93Device_OutputCommandWithParameters:
[158]94    test    BYTE [di+DPT.bFlagsHigh], FLGH_DPT_SERIAL_DEVICE
[150]95    jnz     SHORT .OutputCommandToSerialPort
96    jmp     IdeCommand_OutputWithParameters
[181]97
[150]98ALIGN JUMP_ALIGN
99.OutputCommandToSerialPort:
100    jmp     SerialCommand_OutputWithParameters
[181]101%else
102    Device_OutputCommandWithParameters EQU IdeCommand_OutputWithParameters
[175]103%endif
[150]104
[181]105
[150]106;--------------------------------------------------------------------
107; Device_SelectDrive
108;   Parameters:
109;       DS:DI:  Ptr to DPT (in RAMVARS segment)
110;       SS:BP:  Ptr to IDEPACK
111;   Returns:
112;       AH:     INT 13h Error Code
113;       CF:     Cleared if success, Set if error
114;   Corrupts registers:
115;       AL, BX, CX, DX
116;--------------------------------------------------------------------
[181]117%ifdef MODULE_SERIAL
[150]118ALIGN JUMP_ALIGN
119Device_SelectDrive:
[158]120    test    BYTE [di+DPT.bFlagsHigh], FLGH_DPT_SERIAL_DEVICE
[150]121    jnz     SHORT ReturnSuccessForSerialPort
122    jmp     IdeCommand_SelectDrive
[181]123
[150]124ReturnSuccessForSerialPort:
125    xor     ax, ax
126    ret
[181]127%else
128    Device_SelectDrive EQU IdeCommand_SelectDrive
[175]129%endif
[181]130
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