oempdim.asm

<BIOS研发技术剖析>书的源代码,包括完整的BIOS汇编语言源程序.

 	page	,132
	title	OEM POST HOOKS FOR DIM
;-----------------------------------------------------------------------;
; This file is derived from POSTDIM.ASM and NPOSTDIM.ASM files.		;
; ======================== NOTE === NOTE === NOTE =====================	;
; If the routine name in this file starts with "OEM_", then this routine;
; is called from the corresponding generic chipset hook (in POSTDIM.ASM	;
; or NPOSTDIM.ASM file).						;
; ======================== NOTE === NOTE === NOTE =====================	;
; If the routine name in this file does not start with "OEM_", then this;
; routine is called directly from Core file.				;
;-----------------------------------------------------------------------;
;*****************************************************************;
;*****************************************************************;
;**                                                             **;
;**      (C)Copyright 1985-1996, American Megatrends, Inc.      **;
;**                                                             **;
;**                     All Rights Reserved.                    **;
;**                                                             **;
;**           6145-F Northbelt Pkwy, Norcross, GA 30071         **;
;**                                                             **;
;**                     Phone [phone]                    **;
;**                                                             **;
;*****************************************************************;
;*****************************************************************;
;****************************************************************************;
; $Header: /BIOS/OEM/GENERIC/630/Intel/440BX/Desktop CR/OEMPORT/OEMPDIM.ASM 1     9/15/97 5:56p Juand $
;
; $Revision: 1 $
;
; $Date: 9/15/97 5:56p $
;****************************************************************************;
;****************************************************************************;
; Revision History
; ----------------
; $Log: /BIOS/OEM/GENERIC/630/Intel/440BX/Desktop CR/OEMPORT/OEMPDIM.ASM $
; 
; 1     9/15/97 5:56p Juand
; 
; 1     9/11/97 6:41p Juand
; 
; 1     6/05/97 12:43p Debkumar
; 
; 1     1/31/97 1:15p Debkumar
; New files for 62700.
; 
; 1     1/13/97 2:22p Debkumar
; New file for 6.27.00.
; 
;****************************************************************************;
;---------------------------------------;
	include	dim.equ
	include devnode.equ
	include rt.equ
	include escd.equ
	include pci.equ
	include pnp.equ
	include	setupequ.ext
	include sis530.equ
	include	makeflag.equ
        include P6access.mac
        include P6.equ
;---------------------------------------;
	extrn dih_scratch_data: byte
	extrn dih_manual_ide_id: byte

	extrn SysStatus: dword
	extrn IsaStatus: dword
	extrn EisaStatus: dword
	extrn PnPStatus: dword
	extrn PciStatus: dword

	extrn OwnerWork: byte

	extrn FindDevID: dword
	extrn FindDevSerial: dword
	extrn FindDevLogID: dword
	extrn FindDevType: dword
	extrn FindDevTypeMask: dword
	extrn FindDevInitAll: byte
	extrn FindDevInitAllBoot: byte

	extrn PnPFoundDevCSN: byte
	extrn PnPFoundDevID: dword
	extrn PnPFoundDevSer: dword
	extrn PnPFoundDevLID: dword

	extrn FindDevIncDev: byte
	extrn FindDevIncBus: byte
	extrn PCICommandValue: word
	extrn PCIFoundDevID: dword
	extrn PCIFoundDevFunc: dword
	extrn PCIFoundDevBus: dword

	extrn EscdFuncNum: byte
	extrn EscdSlotNum: byte

	extrn PCIROMMinBase: dword
	extrn PCIROMMaxBase: dword
	extrn MaxPCIBusNumber:byte

	extrn ResMapStart: word
	extrn ResMapEnd:   word

;---------------------------------------;
cgroup	group	_text
_text	segment	word	public	'CODE'
	assume	cs:cgroup
.386
;---------------------------------------;

;==============================================================================;
;                                                                              ;
;                Plug and Play ISA Device Initializer Hooks                    ;
;                                                                              ;
;==============================================================================;

ifdef PNP
;---------------------------------------;
; dih_pnp_func_5 (General Device Init)  ;
;---------------------------------------;--------------------------------------;
; This function is called by the Plug & Play Device Initializer (DI-PNP.ASM)   ;
; during function 5 (General Device Init).                                     ;
;                                                                              ;
; This function should be used to implement the following setup question:      ;
;     Boot to PnP operating system: Yes/No                                     ;
;                                                                              ;
; This question is needed because PnP operating systems (Windows 95) prefer    ;
; that the BIOS initialize only the PnP cards that are needed for booting the  ;
; machine (VGA, SCSI, etc).  The OS will configure all other PnP cards.  If    ;
; the user is booting to a non-PnP OS (NetWare / Unix), then all PnP cards     ;
; must be enabled.  The variable FindDevInitAllBoot controls this feature,     ;
; when set to 00h all PnP cards will be configured.  When FindDevInitAllBoot   ;
; is set to non-zero, then only PnP cards needed for boot will be configured.  ;
;                                                                              ;
; Input: SI = Offset of the NVRam workspace (in _dimdata seg)                  ;
;        DS = ES = _dimdata Segment                                            ;
;                                                                              ;
; Output: CF = Set if error, cleared otherwise                                 ;
;                                                                              ;
; Preserves: DS, ES, BP (all other registers are destroyed)                    ;
;------------------------------------------------------------------------------;
	extrn	check_cmos_data_far:near
	public	dih_pnp_func_5
dih_pnp_func_5	proc near

;---------------------------------------;
IF	MKF_BAD_PNP_CARD

; James 042496: <CORE>--------------->>>;
; Don't init these two cards if found	;
; For ECP PnP & Other PnP card Bug.	;
;---------------------------------------;
	pushad
	mov	si, offset cgroup:dih_check_pnp_device_func_5_table
	mov	cx, (offset cgroup:dih_check_pnp_device_func_5_table_end - offset cgroup:dih_check_pnp_device_func_5_table)/4
dpf5_0:
	lods	cs: dword ptr [si]	;Get PnP card ID from table
	cmp	eax, PnPFoundDevID	;Match with PnP card ID as found by BIOS ?
	loopnz	dpf5_0
	popad
        jz      dpf5_1			;Incompatible PnP card found, force PnP OS to yes
;<<<------------------------------------;

ENDIF
;---------------------------------------;

	mov	FindDevInitAllBoot, 000h;Init all PnP ISA device by default

;; Added by Abel Wu at 03/26/98 for aLI ALS100 Plus PnP Sound Card
	cmp	PnPFoundDevID, 10019305h
	jz	dihirim_01

	mov	al, Q_PNP_AWARE_OS	;"Plug and Play Aware O/S" question
	call	check_cmos_data_far
	jz	dihirim_01		;Br if no PnP aware O/S

dpf5_1:
	mov	FindDevInitAllBoot, 0FFh;Init only boot PnP ISA devices

dihirim_01:
	clc
	ret
dih_pnp_func_5	endp

;---------------------------------------;
; dih_check_pnp_device_func_5_table	;
;---------------------------------------;--------------------------------------;
; This table is used by the Plug & Play Device Initializer (DI-PNP.ASM)        ;
; during function 5 (General Device Init) from DIH_PNP_FUNC_5 hook.            ;
;                                                                              ;
; There are some PnP cards which can NOT be initialized (????). If these cards ;
; are found, set PnP aware OS to yes so that BIOS does not initialize these    ;
; cards, OS will initialize these cards.                                       ;
;                                                                              ;
;------------------------------------------------------------------------------;
IF	MKF_BAD_PNP_CARD
	public	dih_check_pnp_device_func_5_table
	public	dih_check_pnp_device_func_5_table_end
dih_check_pnp_device_func_5_table	label	byte
	dd	2409143Eh		; OPTI924 PnP Sound card
        dd      2509143Eh               ; OPTI925 PnP Sound card
	dd	1013B04Eh		; SuperExpress PnP Modem card
        dd      68187316h               ; ESS 1868 Sound card
dih_check_pnp_device_func_5_table_end	label	byte
ENDIF
;------------------------------------------------------------------------------;