Changeset 262 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Src/Handlers


Ignore:
Timestamp:
Feb 24, 2012, 10:28:31 AM (12 years ago)
Author:
gregli@…
google:author:
gregli@hotmail.com
Message:

More optimizations. Merged RamVars_IsFunction/DriveHandledByThisBIOS in with FindDPT_ForDriveNumber, since they are often used together, making a returned NULL DI pointer indicate a foreign drive in many places. Revamped the iteration done in the handlers for int13/0dh and int13h/0h. Added serial specific print string during drive detection.

Location:
trunk/XTIDE_Universal_BIOS/Src/Handlers
Files:
4 edited

Legend:

Unmodified
Added
Removed

  • trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h.asm

    r260 r262  
    2626
    2727    call    RamVars_GetSegmentToDS
     28       
    2829    call    DriveXlate_ToOrBack
    2930    mov     [RAMVARS.xlateVars+XLATEVARS.bXlatedDrv], dl
    30     call    RamVars_IsFunctionHandledByThisBIOS
    31     jc      SHORT Int13h_DirectCallToAnotherBios
    32 
    33     call    FindDPT_ForDriveNumber      ; DS:DI now points to DPT
    34 
     31       
     32    call    FindDPT_ForDriveNumberInDL              ; DS:DI points to our DPT, or NULL if not our drive
     33    jnc     SHORT .OurFunction                      ; DPT found, this is one of our drives, and thus our function
     34
     35    cmp     ah, 0
     36    jz      short .OurFunction                      ; we handle all function 0h requests (resets)
     37    cmp     ah, 8
     38%ifdef MODULE_SERIAL_FLOPPY
     39    jnz     SHORT Int13h_DirectCallToAnotherBios    ; we handle all traffic for function 08h,
     40                                                    ; as we need to wrap both hard disk and floppy drive counts
     41%else
     42    jz      SHORT .WeHandleTheFunction              ; we handle all *hard disk* (only) traffic for function 08h,
     43                                                    ; as we need to wrap the hard disk drive count
     44    test    dl, dl
     45    jns     SHORT Int13h_DirectCallToAnotherBios
     46%endif     
     47               
     48.OurFunction:   
    3549    ; Jump to correct BIOS function
    3650    eMOVZX  bx, ah

  • trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH0h_HReset.asm

    r259 r262  
    121121GetDriveNumberForForeignBiosesToDL:
    122122    mov     dl, bl
    123     call    RamVars_IsDriveHandledByThisBIOS
    124     jc      SHORT .Return               ; Return what was in BL unmodified
     123    test    di, di
     124    jz      SHORT .Return               ; Return what was in BL unmodified
    125125    mov     dl, 80h
    126126.Return:
    … …  
    141141ALIGN JUMP_ALIGN
    142142AH0h_ResetHardDisksHandledByOurBIOS:
    143     mov     dx, [RAMVARS.wDrvCntAndFirst]   ; DL = drive number, DH = drive count
    144     test    dh, dh
    145     jz      SHORT .AllDrivesReset       ; Return if no drives
    146     add     dh, dl                      ; DH = one past last drive to reset
    147 ALIGN JUMP_ALIGN
    148 .DriveResetLoop:
    149     call    AHDh_ResetDrive
    150     call    .BackupErrorCodeFromMasterOrSlaveToBH
    151     inc     dx
    152     cmp     dl, dh                      ; All done?
    153     jb      SHORT .DriveResetLoop       ;  If not, reset next drive
    154 .AllDrivesReset:
     143    mov     bl, [di+DPT.bIdevarsOffset]                 ; replace drive number with Idevars pointer for comparisons
     144    mov     cl, [cs:ROMVARS.bIdeCnt]                    ; get count of ide controllers
     145    mov     ch, 0                                       
     146    mov     dl, 0                                       ; starting Idevars offset
     147    mov     si, IterateFindFirstDPTforIdevars           ; iteration routine
     148.loop:
     149    call    IterateAllDPTs                              ; look for the first drive on this controller, if any
     150    jc      .notFound
     151    call    AHDh_ResetDrive                             ; reset master and slave on that controller
     152    call    BackupErrorCodeFromTheRequestedDriveToBH    ; save error code if same controller as initial request
     153.notFound:
     154    add     dl, IDEVARS_size                            ; move pointer forward
     155    loop    .loop                                       ; and repeat
    155156    ret
    156157
    157                
    158158;--------------------------------------------------------------------
    159 ; .BackupErrorCodeFromMasterOrSlaveToBH
    160 ;   Parameters:
    161 ;       AH:     Error code for drive DL reset
    162 ;       BL:     Requested drive (DL when entering AH=00h)
    163 ;       DL:     Drive just resetted
    164 ;       DS:     RAMVARS segment
    165 ;   Returns:
    166 ;       BH:     Backuped error code
    167 ;       DL:     Incremented if next drive is slave drive
    168 ;               (=already resetted)
    169 ;   Corrupts registers:
    170 ;       CX, DI
     159; Iteration routine for AH0h_ResetHardDisksHandledByOurBIOS,
     160; for use with IterateAllDPTs
     161;
     162; Returns when DPT is found on the controller with Idevars offset in DL
    171163;--------------------------------------------------------------------
    172 ALIGN JUMP_ALIGN
    173 .BackupErrorCodeFromMasterOrSlaveToBH:
    174     call    BackupErrorCodeFromTheRequestedDriveToBH
    175     call    GetBasePortToCX             ; Load base port for resetted drive
    176     push    cx
    177     inc     dx                          ; DL to next drive
    178     call    GetBasePortToCX
    179     pop     di
    180     cmp     cx, di                      ; Next drive is from same controller?
    181     je      SHORT BackupErrorCodeFromTheRequestedDriveToBH
    182 .NoMoreDrivesOrNoSlaveDrive:
    183     dec     dx
     164IterateFindFirstDPTforIdevars:     
     165    cmp     dl, [di+DPT.bIdevarsOffset]         ; Clears CF if matched
     166    jz      .done
     167    stc                                         ; Set CF for not found
     168.done: 
    184169    ret
    185 
    186        
    187 ;--------------------------------------------------------------------
    188 ; GetBasePortToCX
    189 ;   Parameters:
    190 ;       DL:     Drive number
    191 ;       DS:     RAMVARS segment
    192 ;   Returns:
    193 ;       CX:     Base port address
    194 ;       CF:     Set if valid drive number
    195 ;               Cleared if invalid drive number
    196 ;   Corrupts registers:
    197 ;       DI
    198 ;--------------------------------------------------------------------
    199 ALIGN JUMP_ALIGN
    200 GetBasePortToCX:
    201     xchg    cx, bx
    202     xor     bx, bx
    203     call    FindDPT_ForDriveNumber
    204     mov     bl, [di+DPT.bIdevarsOffset]
    205     mov     bx, [cs:bx+IDEVARS.wPort]
    206     xchg    bx, cx
    207     ret
    208 
    209 

  • trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AH8h_HParams.asm

    r261 r262  
    2525;--------------------------------------------------------------------
    2626AH8h_HandlerForReadDiskDriveParameters:
    27 
    28     call    RamVars_IsDriveHandledByThisBIOS
    29     jnc     SHORT .OurDrive
     27    test    di,di
     28    jnz     SHORT .OurDrive
    3029
    3130    call    Int13h_CallPreviousInt13hHandler

  • trunk/XTIDE_Universal_BIOS/Src/Handlers/Int13h/AHDh_HReset.asm

    r200 r262  
    4040;       CF:     0 if succesfull, 1 if error
    4141;   Corrupts registers:
    42 ;       AL, CX, SI, DI
     42;       AL, CX, SI
    4343;--------------------------------------------------------------------
    4444;ALIGN JUMP_ALIGN
    … …  
    4646    push    dx
    4747    push    bx
     48    push    di
    4849
    49     call    FindDPT_ForDriveNumber      ; DS:DI now points to DPT
    5050    call    Interrupts_UnmaskInterruptControllerForDriveInDSDI
    5151    call    Device_ResetMasterAndSlaveController
    52     ;jc     SHORT .ReturnError          ; CF would be set if slave drive present without master
    53                                         ; (error register has special values after reset)
     52    ;jc     SHORT .ReturnError                  ; CF would be set if slave drive present without master
     53                                                ; (error register has special values after reset)
    5454
    5555    ; Initialize Master and Slave drives
    56     eMOVZX  bx, BYTE [di+DPT.bIdevarsOffset]
    57     mov     dx, [cs:bx+IDEVARS.wPort]
    58     call    InitializeMasterAndSlaveDriveFromPortInDX
     56    mov     al, [di+DPT.bIdevarsOffset]         ; pointer to controller we are looking to reset
     57    mov     ah, 0                               ; initialize error code, assume success
     58       
     59    mov     si, IterateAndResetDrives
     60    call    IterateAllDPTs
    5961
     62    shr     ah, 1                               ; Move error code and CF into proper position
     63
     64    pop     di
    6065    pop     bx
    6166    pop     dx
    6267    ret
    6368
    64 
    6569;--------------------------------------------------------------------
    66 ; InitializeMasterAndSlaveDriveFromPortInDX
    67 ;   Parameters:
    68 ;       DX:     IDE Base Port address
    69 ;       SS:BP:  Ptr to IDEPACK
    70 ;   Returns:
    71 ;       AH:     Error code
    72 ;       CF:     0 if initialization succesfull
    73 ;               1 if any error
    74 ;   Corrupts registers:
    75 ;       AL, BX, CX, DX, SI, DI
     70; IterateAndResetDrives: Iteration routine for use with IterateAllDPTs.
     71;
     72; When a drive on the controller is found, it is reset, and the error code
     73; merged into overall error code for this controller.  Master will be reset
     74; first.  Note that the iteration will go until the end of the DPT list.
    7675;--------------------------------------------------------------------
    77 ALIGN JUMP_ALIGN
    78 InitializeMasterAndSlaveDriveFromPortInDX:
    79     push    dx                          ; Store base port address
    80     xor     cx, cx                      ; Assume no errors
    81     FindDPT_ToDSDIForIdeMasterAtPortDX
    82     jnc     SHORT .InitializeSlave      ; Master drive not present
    83     call    AH9h_InitializeDriveForUse
    84     mov     cl, ah                      ; Copy error code to CL
    85 .InitializeSlave:
    86     pop     dx                          ; Restore base port address
    87     FindDPT_ToDSDIForIdeSlaveAtPortDX
    88     jnc     SHORT .CombineErrors        ; Slave drive not present
    89     call    AH9h_InitializeDriveForUse
    90     mov     ch, ah                      ; Copy error code to CH
    91 .CombineErrors:
    92     or      cl, ch                      ; OR error codes, clear CF
    93     jz      SHORT .Return
    94     mov     ah, RET_HD_RESETFAIL        ; Load Reset Failed error code
    95     stc
    96 .Return:
     76IterateAndResetDrives:
     77    cmp     al, [di+DPT.bIdevarsOffset]         ; The right controller?
     78    jnz     .done
     79    push    ax
     80    call    AH9h_InitializeDriveForUse          ; Reset Master and Slave (Master will come first in DPT list)
     81    pop     ax     
     82    jc      .done
     83    or      ah, (RET_HD_RESETFAIL << 1) | 1     ; OR in Reset Failed error code and CF, will SHR into position later
     84.done:
     85    stc                                         ; From IterateAllDPTs perspective, the DPT is never found
    9786    ret
     87       
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