start.s

nucleus 嵌入式系统文件Start.s

        MOVE.W  #$008F,SIM_BASE+TPU_PRAM0
;TPU0:OFFSET:5000      ;1MS
        MOVE.W  #4946,SIM_BASE+TPU_PRAM0+2
;TPU0的REF_ADDR1:TCR1
        MOVE.W  #$00EC,SIM_BASE+TPU_PRAM0+4

;TPU15控制字段:%0000 0000 0000 1011(检测下降沿)
        MOVE.W  #$0008,SIM_BASE+TPU_PRAM15		;0000 000-0 000-0 10-00	Page296
;TPU15的bank_address字段:$820e(无效地址)
        MOVE.W  #$000E,SIM_BASE+TPU_PRAM15+2
;TPU15的MAX_COUNT字段:$0100(256次跳变产生中断)
        MOVE.W  #$0100,SIM_BASE+TPU_PRAM15+4

        MOVE.W  #$0008,SIM_BASE+TPU_PRAM14
        MOVE.W  #$000E,SIM_BASE+TPU_PRAM14+2
        MOVE.W  #$0100,SIM_BASE+TPU_PRAM14+4

		MOVE.W	#$0008,SIM_BASE+TPU_PRAM13
		MOVE.W	#$000E,SIM_BASE+TPU_PRAM13+2
		MOVE.W	#$0100,SIM_BASE+TPU_PRAM13+4

;TPU1-TPU12控制字段:不使用

;TPU1-TPU12 初始化为低电平10;OC,ITC无主机服务申请00
        MOVE.W  #$02AA,SIM_BASE+TPU_HSRR0       ;0000 0010 1010 1010
        MOVE.W  #$AAA8,SIM_BASE+TPU_HSRR1       ;1010 1010 1010 1000

;TPU各通道优先级设置:
;TPU0优先级为高11
;TPU15,14,13 优先级为中10,1010
;TPU1-TPU12 优先级为低01,并初始化为低电平

        MOVE.W  #$A955,SIM_BASE+TPU_CPR0        ;1010 1001 0101 0101
        MOVE.W  #$5557,SIM_BASE+TPU_CPR1        ;0101 0101 0101 0111

;************************************************************
;	QSM 初始化
;************************************************************

  .IF BDM_USED==0
;QSM_QMCR设置:STOP=0,FRZ=%00,SUPV=1,IARB=%1010
	MOVE.W	#$008A,SIM_BASE+QSM_QMCR			;%0000 0000 1000 1010
  .ELSE
;QSM_QMCR设置:STOP=0,FRZ=%10,SUPV=1,IARB=%1010
	MOVE.W	#$408A,SIM_BASE+QSM_QMCR			;%0100 0000 1000 1010
  .ENDIF

;QSM中断优先级设置:SPI为0,SCI为3
	MOVE.B	#$05,SIM_BASE+QSM_QILR;%00-00 0-011

;QSM中断向量设置:50H
	MOVE.B	#$50,SIM_BASE+QSM_QIVR

;QSM口数据寄存器设置:%1000 0001
	MOVE.B	#$BF,SIM_BASE+QSM_QPDR			;1011 1111 TXD,PCS3,PCS2,PCS1  PCS0,SCK,MOSI,MISO


;************************************************************
;	QSPI 初始化
;************************************************************

;清QSPI状态寄存器
	AND.B	#$00,SIM_BASE+QSM_SPSR

;QSPI的SPCR0设置:;;;MSTR=0,WOMQ=0,BITS=0000,CPOL=0,CPHA=1,SP=0000 0000
	MOVE.W	#$8105,SIM_BASE+QSM_SPCR0

;QSPI的SPCR2设置:SPIFIE=1,WREN=0,WRTO=0,ENDQP=0000,NEWQP=0000
	MOVE.W	#$0000,SIM_BASE+QSM_SPCR2

;QSPI的SPCR3设置:LOOPQ=0,HMIE=0,HALT=0
	MOVE.B	#$00,SIM_BASE+QSM_SPCR3

;QSPI的SPCR1设置:SPE=0,DSCKL no used,DTL no used
	MOVE.W	#$3004,SIM_BASE+QSM_SPCR1

;QSM口方向寄存器设置:%1111 1110(0-输入,1-输出)
	MOVE.B	#$FE,SIM_BASE+QSM_QDDR

;QSM口分配寄存器设置:%0111 1011(0-I/O,1-Function),Bit15,Bit10 No used
	MOVE.B	#$7B,SIM_BASE+QSM_QPAR


;************************************************************
;	 ;周期中断设置，中断级别为2，中断号为0X60
;************************************************************

;PITR设置:PTP=1,PITR0-7=49周期为0.0050176秒
 	MOVE.W	#$0131,SIM_BASE+SIM_PITR

;PICR设置:中断优先级为2(周期中断),中断向量设为60H
	MOVE.W	#$0260,SIM_BASE+SIM_PICR;控制

;清软件WatchDog计数器
	MOVE.B	#$55,SIM_BASE+SIM_SWSR
	MOVE.B	#$AA,SIM_BASE+SIM_SWSR

;***********************************************************
;		Initialize other RAM from ROM.
;***********************************************************
	MOVE.L	#DATA,A0			; A0 = ROM base of region data
	MOVE.L	#`BASE(data),A1		; A1 = RAM base of region data
	MOVE.L	#`SIZE(data),D0		; D0 = size of region data
	LSR.L	#2,D0		        ; compute size in longs
	BRA	IDBF					; enter a fast loop
ILP:	MOVE.L	(A0)+,(A1)+		; move four bytes at a time
IDBF:	DBF	D0,ILP				; up to 256K in inner loop
	SUB.L	#$10000,D0			; rest in outer loop
	BHS	ILP

  .IF MALLOC_USED
;***********************************************************
;		Initialize memory allocator.
;***********************************************************
	MOVE.L	#`BASE(malloc),D0	; address of malloc region
	MOVE.L	#`SIZE(malloc),D1	; size of malloc region
    .IF "ptrd"?"2"
	SWAP	D0					; handle 2-byte C "pointers"
    .ENDIF
    .IF "long"?"2"
	SWAP	D1					; handle 2-byte C "longs"
    .ENDIF
	MOVE.L	D0,__brkp			; vars referenced by mbrk()
	MOVE.L	D1,__brksz
  .ENDIF



 .IF CPLUSPLUS
;***********************************************************
;		Call any C++ initializer thunks.
;***********************************************************
	MOVE.L	#`BASE(init),A5		; A5 = base of region init
	MOVE.L	#`SIZE(init),D7		; D7 = size of region init
    .IF "ptrf"?"2"
	LSR.L	#1,D7			; number of initializer thunks
    .ELSE
	LSR.L	#2,D7			; number of initializer thunks
    .ENDIF
	BRA	NDBF				; enter loop
NLP:
    .IF "ptrf"?"2"
	MOVE.W	(A5)+,A0		; get address of thunk
    .ELSE
	MOVE.L	(A5)+,A0		; get address of thunk
    .ENDIF
	CMP.W	#0x4E71,A0		; NOP may pad region
	BEQ	NDBF
	JSR	(A0)				; call initializer thunk
NDBF:	DBF	D7,NLP			; up to 256K in inner loop
	SUB.L	#$10000,D7		; rest in outer loop
	BHS	NLP
 .ENDIF

;清软件WatchDog计数器
	MOVE.B	#$55,SIM_BASE+SIM_SWSR
	MOVE.B	#$AA,SIM_BASE+SIM_SWSR

;***********************************************************
;		Check control registers.
;***********************************************************
; 	BSR	__Check_Register

;***********************************************************
;		Initionalize flag.
;***********************************************************
;	BSR.L	BIOSInit;调用BIOS初始化程序
;***********************************************************
;		Invoke main() with no arguments.
;***********************************************************
	JSR	_main

;***********************************************************
;		Call any C++ exit thunks.
;***********************************************************
__exit
 .IF CPLUSPLUS
	MOVE.L	#`BASE(exit),A5		; A5 = base of region exit
	MOVE.L	#`SIZE(exit),D7		; D7 = size of region exit
	ADD.L	D7,A5			; reverse order
    .IF "ptrf"?"2"
	LSR.L	#1,D7			; number of exit thunks
    .ELSE
	LSR.L	#2,D7			; number of exit thunks
    .ENDIF
	BRA	XDBF				; enter loop
XLP:
    .IF "ptrf"?"2"
	MOVE.W	-(A5),A0		; get address of thunk
    .ELSE
	MOVE.L	-(A5),A0		; get address of thunk
    .ENDIF
	CMP.W	#0x4E71,A0		; NOP may pad region
	BEQ	XDBF
	JSR	(A0)				; call exit thunk
XDBF:	DBF	D7,XLP			; up to 256K in inner loop
	SUB.L	#$10000,D7		; rest in outer loop
	BHS	XLP
 .ENDIF

DONE	BRA	DONE			; loop if main ever returns

;**********************************************************************
;	检查控制寄存器
;**********************************************************************
	SECTION	code
	.FDEF	__Check_Register,0
__Check_Register:
  .IF	BDM_USED==0
	MOVEC	VBR,D0
	TST.L	D0
	BNE	._ERR

	CMP.W	#$80C7,SIM_BASE+SIM_MCR
	BNE	._ERR
	CMP.B	#$DC,SIM_BASE+SIM_SYPCR
	BNE	._ERR

	CMP.B	#$FB,SIM_BASE+SIM_DDRE		;WAAA_NEW
	BNE	._ERR
	CMP.B	#$04,SIM_BASE+SIM_PEPAR		;WAAA_NEW
	BNE	._ERR
	CMP.B	#$EE,SIM_BASE+SIM_DDRF
	BNE	._ERR
;	CMP.B	#$11,SIM_BASE+SIM_PFPAR
;	BNE	._ERR

	CMP.W	#$3AFF,SIM_BASE+SIM_CSPAR0
	BNE	._ERR
	CMP.W	#$03FD,SIM_BASE+SIM_CSPAR1
	BNE	._ERR

	CMP.W	#D_ROM_SIZE,SIM_BASE+SIM_CSBARBT
	BNE	._ERR
	CMP.W	#$6830,SIM_BASE+SIM_CSORBT
	BNE	._ERR

	CMP.W	#D_RAM_CSBAR,SIM_BASE+SIM_CSBAR0
	BNE	._ERR
	CMP.W	#D_RAM_CSBAR,SIM_BASE+SIM_CSBAR1
	BNE	._ERR
	CMP.W	#D_RAM_CSBAR,SIM_BASE+SIM_CSBAR2
	BNE	._ERR

	CMP.W	#$2007,SIM_BASE+SIM_CSBAR3
	BNE	._ERR
	CMP.W	#$2007,SIM_BASE+SIM_CSBAR4
	BNE	._ERR
	CMP.W	#$FF88,SIM_BASE+SIM_CSBAR5
	BNE	._ERR
	CMP.W 	#$FFF3,SIM_BASE+SIM_CSBAR6
	BNE ._ERR
	CMP.W	#$FF80,SIM_BASE+SIM_CSBAR7
	BNE	._ERR
	CMP.W	#$4101,SIM_BASE+SIM_CSBAR8
	BNE	._ERR
	CMP.W	#$FFF0,SIM_BASE+SIM_CSBAR9
	BNE	._ERR
	CMP.W	#$0006,SIM_BASE+SIM_CSBAR10
	BNE	._ERR

	CMP.W	#$5030,SIM_BASE+SIM_CSOR0
	BNE	._ERR
	CMP.W	#$3030,SIM_BASE+SIM_CSOR1
	BNE	._ERR
	CMP.W	#$6830,SIM_BASE+SIM_CSOR2
	BNE	._ERR
	CMP.W	#$7030,SIM_BASE+SIM_CSOR3
	BNE	._ERR
	CMP.W	#$6830,SIM_BASE+SIM_CSOR4
	BNE	._ERR
	CMP.W	#$6830,SIM_BASE+SIM_CSOR5
	BNE	._ERR
	CMP.W 	#$2809,SIM_BASE+SIM_CSOR6
	BNE ._ERR
	CMP.W	#$6830,SIM_BASE+SIM_CSOR7
	BNE	._ERR
	CMP.W	#$7870,SIM_BASE+SIM_CSOR8
	BNE	._ERR
	CMP.W	#$6830,SIM_BASE+SIM_CSOR9
	BNE	._ERR
	CMP.W	#$7030,SIM_BASE+SIM_CSOR10
	BNE	._ERR

	CMP.W	#$0000,SIM_BASE+RAM_MCR
	BNE	._ERR
	CMP.W	#D_IRAM_BAR,SIM_BASE+RAM_BAR
	BNE	._ERR

	CMP.W	#$00CE,SIM_BASE+TPU_TMCR
	BNE	._ERR
	CMP.W	#$0640,SIM_BASE+TPU_TICR
	BNE	._ERR

	CMP.W	#$AAA8,SIM_BASE+TPU_CFSR0
	BNE	._ERR

	CMP.W	#$8888,SIM_BASE+TPU_CFSR1
	BNE	._ERR
	CMP.W	#$8888,SIM_BASE+TPU_CFSR2
	BNE	._ERR
	CMP.W	#$888E,SIM_BASE+TPU_CFSR3
	BNE	._ERR
	CMP.W	#$5400,SIM_BASE+TPU_HSQR0
	BNE	._ERR
	CMP.W	#$0000,SIM_BASE+TPU_HSQR1
	BNE	._ERR

	CMP.W	#$008F,SIM_BASE+TPU_PRAM0
	BNE	._ERR
	CMP.W	#$00EC,SIM_BASE+TPU_PRAM0+4
	BNE	._ERR

	CMP.W	#$A955,SIM_BASE+TPU_CPR0
	BNE	._ERR
	CMP.W	#$5557,SIM_BASE+TPU_CPR1
	BNE	._ERR

	CMP.W	#$008A,SIM_BASE+QSM_QMCR
	BNE	._ERR

	;CMP.B	#$2d,SIM_BASE+QSM_QILR
	;BNE	._ERR
	CMP.B	#$51,SIM_BASE+QSM_QIVR
	BNE	._ERR
	CMP.B	#$FE,SIM_BASE+QSM_QDDR
	BNE	._ERR
	CMP.B	#$7B,SIM_BASE+QSM_QPAR
	BNE	._ERR

	CMP.W	#$0131,SIM_BASE+SIM_PITR
	BNE	._ERR
  .ENDIF

	RTS

._ERR	BRA.L	__ResetCpu
._EXIT	RTS

_RegisterErrorProcess:
	BRA.L	__ResetCpu

;**********************************************************************
;	RESET VECTOR: to supervisor program space at address 0.
;**********************************************************************
	SECTION	reset
    XDEF    _INT_Vectors
_INT_Vectors:
	DC.L	STKTOP			; initial stack pointer
	DC.L	START			; initial execution address
;**********************************************************************
;	OTHER EXCEPTION VECTORS: to supervisor data space at address 8,
;	or 8 bytes beyond where the vector base register will point.
;	This table is commented out because no actual interrupt rou-
;	tines are provided.
;**********************************************************************
    SECTION vectors
 	DC.L	BUSERROR,ADRERROR						; 0x08
	DC.L	ILLEGAL,ZERODIV,CHK,TRAPV				; 0x10
	DC.L	PRIVILEGE,TRACE,EMULA,EMULF				; 0x20
	DC.L	RESVD,PROTO,FORMAT,UNINIT				; 0x30
	DCB.L	8,RESVD									; 0x40

	;DC.L	_INT_Level_4_Auto,AUTO1,AUTO2,AUTO3				; 0x60
	DC.L	SPURIOUS,AUTO1,AUTO2,AUTO3				;WAAA_NEW	

	DC.L	_INT_Level_4_Auto,AUTO5,AUTO6,AUTO7					; 0x70
	DC.L	TRAP0,TRAP1,TRAP2,TRAP3					; 0x80
	DC.L	TRAP4,TRAP5,TRAP6,TRAP7					; 0x90
	DC.L	TRAP8,TRAP9,TRAPA,TRAPB					; 0xa0
	DC.L	TRAPC,TRAPD,TRAPE,TRAPF					; 0xb0
	DC.L	FUNORD,FNEXACT,FZERODIV,FUNFLOW			; 0xc0
	DC.L	FOPND,FOVFLOW,FSNAN,RESVD				; 0xd0
	DCB.L	8,RESVD									; 0xe0
    DC.L    INT_TPU0,INT_TPU1,INT_TPU2,INT_TPU3     ; 0x100
	DC.L	INT_TPU4,INT_TPU5,INT_TPU6,INT_TPU7     ; 0x110
	DC.L	INT_TPU8,INT_TPU9,INT_TPUA,INT_TPUB     ; 0x120
	DC.L	INT_TPUC,INT_TPUD,INT_TPUE,INT_TPUF     ; 0x130
	DC.L	_INT_User_16,USER      					; 0x140
    DC.L    USER
	DCB.L	13,USER									; 0x148
    DC.L    _INT_Timer_Interrupt                    ; 0x180
	DCB.L	159,USER								; 0x184

	END