ayncinit.asm

一个虚拟光驱程序源代码

.386p

.xlist
	include vmm.inc

	include debug.inc
	include ilb.inc
	include aep.inc
	include isp.inc
	include	ddb.inc
	include dcb.inc
	include portddb.inc
	
;	include	iodebug.inc	; dragon debug stuff
	include	configmg.inc	; used to process the dev node
	include	opttest.inc	; optimized test, or, and and macros
.list

memcpy proto C, lpd:PTR, lps:DWORD, size_t:DWORD


VXD_LOCKED_CODE_SEG

extrn	milb:DWORD
extrn	OnAsyncRequest:near

BeginProc	Port_Async_Request, esp ;处理系统事件
ArgVar	AEPPtr, DWORD

	TRAP
	EnterProc
	
	mov		ebx, AEPPtr
	mov		[ebx.AEP_result], AEP_SUCCESS

	mov		si, [ebx.AEP_func]

	cmp		si, AEP_INITIALIZE
	je		AEP_Init
	cmp 		si, AEP_Boot_Complete
	je		AEP_BootComplete
	cmp		si, AEP_CONFIG_DCB
	je		AEP_ConfigDcb
	cmp		si, AEP_IOP_TIMEOUT
	je		AEP_IopTimeOut
	cmp		si, AEP_DEVICE_INQUIRY
	je		AEP_DeviceInquiry
			
	mov		[ebx.AEP_result],AEP_FAILURE
	
	LeaveProc
	Return	

EndProc		Port_Async_Request

VXD_LOCKED_CODE_ENDS

;==================================================

VXD_PAGEABLE_DATA_SEG

	public	DevCount
		DevCount	db	0

	vendor			db	" Yan.J.F  VCDRom Driver     ",0,0

	BDF_Removable 		EQU	4

VXD_PAGEABLE_DATA_ENDS

;==================================================

VXD_PAGEABLE_CODE_SEG


BeginProc	AEP_Init

	TRAP
	EnterProc

	sub 	esp, size ISP_ddb_create
	mov		edi, esp
	
	mov	[edi].ISP_ddb_hdr.ISP_func, ISP_CREATE_DDB
	mov	[edi].ISP_ddb_size, size DDB;
	mov	[edi].ISP_ddb_flags, 0
	
	push	edi
	call	[milb.ILB_service_rtn]
	movzx	eax, [edi].ISP_ddb_hdr.ISP_result
	add	esp, size ISP_ddb_create + 4
	cmp	eax, 0
	jne	@F

	
m_exit:
;;;;;;;;;;;// not deallocate!!!!!!!!!	
	LeaveProc
	Return

@@:
	mov		[ebx.AEP_result],AEP_FAILURE
	jmp		m_exit
	
EndProc	AEP_Init

;;;;;;;;;;;;;;;;;;;;;;;;;;

BeginProc	AEP_ConfigDcb

	TRAP
	EnterProc

	mov 	esi, [ebx].AEP_d_c_dcb


	inc		[DevCount]

	mov		[esi].DCB_device_type, DCB_type_cdrom ; 我是光驱
	mov		[esi].DCB_disk_bpb_flags, DCBF_DISK_BPB_USEFAKE
	or		[esi].DCB_device_flags, DCB_DEV_REMOVABLE
	or		[esi].DCB_tsd_flags, DCB_TSD_ACTUAL_PRE_SET

;;;;;;;;;;;;;;;;;;;;;;

	mov		[esi].DCB_max_xfer_len, 08000H
	mov		[esi].DCB_max_sg_elements, 16
	
	push 	esi
	push	edi

	mov		esi, edi	
	sub		esp, size ISP_calldown_insert
	mov		edi, esp
	
	mov		[edi].ISP_func, ISP_insert_calldown
	mov		[edi].ISP_i_cd_flags, DCB_dmd_small_memory
	or		[edi].ISP_i_cd_flags, DCB_dmd_physical
	or		[edi].ISP_i_cd_flags, DCB_dmd_load_eject_media
	mov		[edi].ISP_i_cd_dcb, esi
	mov		al, [ebx.AEP_lgn]
	mov		[edi].ISP_i_cd_lgn, al
	mov		[edi].ISP_i_cd_req, offset32 OnAsyncRequest ;挂接客户呼叫处理过程
	mov		eax, [ebx.AEP_ddb]
	mov		[edi].ISP_i_cd_ddb, eax
	mov		[edi].ISP_i_cd_expan_len, 0
	push	edi
	call	[milb.ILB_Service_rtn]
	add		esp, size ISP_calldown_insert + 4
	
	pop		edi
	pop		esi

c_exit:	

	LeaveProc
	Return

failed_exit:
	mov		[ebx].AEP_result, AEP_FAILURE
	jmp		c_exit
	
EndProc	AEP_ConfigDcb

;;;;;;;;;;;;;;;;;;;;
	
BeginProc	AEP_BootComplete

	TRAP
	EnterProc
	
	cmp 	[DevCount], 0 ;我只建立一个虚拟光驱
	je		@F
	
	LeaveProc
	Return

@@:
	mov 	[ebx.AEP_result], AEP_FAILURE

EndProc	AEP_BootComplete

;;;;;;;;;;;;;;;;;;;;;;;;;;;

BeginProc	AEP_IopTimeOut
	
	TRAP
	
	Return
	
EndProc	AEP_IopTimeOut

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

BeginProc	AEP_DeviceInquiry ;填写虚拟光驱信息
	
	TRAP
	EnterProc
	
	mov 	esi, [ebx.AEP_i_d_dcb]
;	AssertDCB <esi>      this macro in the <iodebug.inc>

	movzx	ecx, [esi].DCB_unit_on_ctl
	cmp 	ecx, 0
	jne		@F
	
	mov		[esi].DCB_inquiry_flags, DCB_type_cdrom
	invoke	memcpy, addr [esi].DCB_vendor_id, near32 ptr [vendor], 28
	
q_exit:	
	LeaveProc
	Return

@@:
	mov		[ebx.AEP_result], AEP_NO_MORE_DEVICES
	jmp		q_exit	

EndProc	AEP_DeviceInquiry

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;


VXD_PAGEABLE_CODE_ENDS

end