source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS_Configurator_v2/Src/AutoConfigure.asm@ 498

; Project name  :   XTIDE Universal BIOS Configurator v2
; Description   :   Functions to automatically configure XTIDE
;                   Universal BIOS for current system.

;
; XTIDE Universal BIOS and Associated Tools
; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team.
;
; This program is free software; you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation; either version 2 of the License, or
; (at your option) any later version.
;
; This program is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
; GNU General Public License for more details.
; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
;

; Section containing code
SECTION .text


;--------------------------------------------------------------------
; AutoConfigure_ForThisSystem
; MENUITEM activation function (.fnActivate)
;   Parameters:
;       SS:BP:  Ptr to MENU
;   Returns:
;       Nothing
;   Corrupts registers:
;       All, except segments
;--------------------------------------------------------------------
ALIGN JUMP_ALIGN
AutoConfigure_ForThisSystem:
    push    es
    push    ds

    call    Buffers_GetFileBufferToESDI     ; ROMVARS now in ES:DI
    push    es
    pop     ds                              ; ROMVARS now in DS:DI
    call    ResetIdevarsToDefaultValues
    call    DetectIdePortsAndDevices
    call    StoreAndDisplayNumberOfControllers

    pop     ds
    pop     es
    ret


;--------------------------------------------------------------------
; ResetIdevarsToDefaultValues
;   Parameters:
;       DS:DI:  Ptr to ROMVARS
;   Returns:
;       Nothing
;   Corrupts registers:
;       AX, CX
;--------------------------------------------------------------------
ALIGN JUMP_ALIGN
ResetIdevarsToDefaultValues:
    push    di
    add     di, BYTE ROMVARS.ideVarsBegin
    mov     cx, ROMVARS.ideVarsEnd - ROMVARS.ideVarsBegin
    call    Memory_ZeroESDIwithSizeInCX ; Never clears ROMVARS.ideVarsSerialAuto
    pop     di

    ; Set default values (other than zero)
    mov     ax, DISABLE_WRITE_CACHE | (TRANSLATEMODE_AUTO<<TRANSLATEMODE_FIELD_POSITION) | FLG_DRVPARAMS_BLOCKMODE
    mov     [di+ROMVARS.ideVars0+IDEVARS.drvParamsMaster+DRVPARAMS.wFlags], ax
    mov     [di+ROMVARS.ideVars1+IDEVARS.drvParamsMaster+DRVPARAMS.wFlags], ax
    mov     [di+ROMVARS.ideVars2+IDEVARS.drvParamsMaster+DRVPARAMS.wFlags], ax
    mov     [di+ROMVARS.ideVars3+IDEVARS.drvParamsMaster+DRVPARAMS.wFlags], ax
    ret


;--------------------------------------------------------------------
; DetectIdePortsAndDevices
;   Parameters:
;       DS:DI:  Ptr to ROMVARS
;   Returns:
;       CX:     Number of controllers detected
;   Corrupts registers:
;       AX, BX, DX, SI
;--------------------------------------------------------------------
ALIGN JUMP_ALIGN
DetectIdePortsAndDevices:
    xor     cx, cx                          ; Number of devices found
    xor     dx, dx                          ; IDE_PORT_TO_START_DETECTION
    lea     si, [di+ROMVARS.ideVarsBegin]   ; DS:SI points to first IDEVARS

.DetectFromNextPort:
    call    IdeAutodetect_IncrementDXtoNextIdeBasePort
    jz      SHORT .AllPortsAlreadyDetected
    push    cx
    call    IdeAutodetect_DetectIdeDeviceFromPortDX
    pop     cx
    jc      SHORT .DetectFromNextPort

    ; Device found from port DX, Device Type returned in AL
    inc     cx  ; Increment number of controllers found
    call    GetControlBlockPortToBXfromDeviceTypeInALandBasePortInDX
    mov     [si+IDEVARS.wBasePort], dx
    mov     [si+IDEVARS.wControlBlockPort], bx
    mov     [si+IDEVARS.bDevice], al

    ; Point to next IDEVARS
    cmp     si, ROMVARS.ideVars3
    jae     SHORT .AllPortsAlreadyDetected
    add     si, IDEVARS_size
    jmp     SHORT .DetectFromNextPort
.AllPortsAlreadyDetected:
    ret


;--------------------------------------------------------------------
; GetControlBlockPortToBXfromDeviceTypeInALandBasePortInDX
;   Parameters:
;       AL:     Device Type
;       DX:     Base port
;   Returns:
;       BX:     Control Block Port
;   Corrupts registers:
;       Nothing
;--------------------------------------------------------------------
ALIGN JUMP_ALIGN
GetControlBlockPortToBXfromDeviceTypeInALandBasePortInDX:
    mov     bx, dx
    cmp     al, DEVICE_8BIT_XTIDE_REV1
    jae     SHORT .NonStandardControlBlockPortLocation

    ; Standard IDE Devices
    add     bx, STANDARD_CONTROL_BLOCK_OFFSET
    ret

.NonStandardControlBlockPortLocation:
    cmp     al, DEVICE_8BIT_JRIDE_ISA
    je      SHORT .JrIdeIsaDoesNotNeedControlBlockAddress

    ; 8-bit Devices
    add     bx, BYTE XTIDE_CONTROL_BLOCK_OFFSET ; XT-CF also
.JrIdeIsaDoesNotNeedControlBlockAddress:
    ret


;--------------------------------------------------------------------
; StoreAndDisplayNumberOfControllers
;   Parameters:
;       CX:     Number of controllers detected
;       DS:DI:  Ptr to ROMVARS
;       SS:BP:  Ptr to MENU
;   Returns:
;       Nothing
;   Corrupts registers:
;       AX, BX, DX, DI, SI, DS, ES
;--------------------------------------------------------------------
ALIGN JUMP_ALIGN
StoreAndDisplayNumberOfControllers:
    mov     ax, 1
    MAX_U   al, cl                      ; Cannot store zero
    test    BYTE [di+ROMVARS.wFlags], FLG_ROMVARS_FULLMODE
    jnz     SHORT .FullModeSoNoNeedToLimit
    MIN_U   al, MAX_LITE_MODE_CONTROLLERS
.FullModeSoNoNeedToLimit:

    ; Store number of IDE Controllers. This will also modify
    ; menu and set unsaved changes flag.
    push    cs
    pop     ds
    mov     si, g_MenuitemConfigurationIdeControllers
    call    Menuitem_StoreValueFromAXtoMenuitemInDSSI

    ; Display results (should be changed to proper string formatting)
    add     cl, '0'
    mov     [cs:g_bControllersDetected], cl
    mov     dx, g_szDlgAutoConfigure
    jmp     Dialogs_DisplayNotificationFromCSDX