os_cpu_c.src

uC/OS操作系统在51平台的移植代码

; ..\out\OS_CPU_C.SRC generated from: ..\port\OS_CPU_C.C

$NOMOD51

NAME	OS_CPU_C

P0	DATA	080H
P1	DATA	090H
P2	DATA	0A0H
P3	DATA	0B0H
T0	BIT	0B0H.4
AC	BIT	0D0H.6
T1	BIT	0B0H.5
T2	BIT	090H.0
EA	BIT	0A8H.7
IE	DATA	0A8H
EXF2	BIT	0C8H.6
RD	BIT	0B0H.7
ES	BIT	0A8H.4
IP	DATA	0B8H
RI	BIT	098H.0
INT0	BIT	0B0H.2
CY	BIT	0D0H.7
TI	BIT	098H.1
INT1	BIT	0B0H.3
RCAP2H	DATA	0CBH
PS	BIT	0B8H.4
SP	DATA	081H
T2EX	BIT	090H.1
OV	BIT	0D0H.2
RCAP2L	DATA	0CAH
C_T2	BIT	0C8H.1
WR	BIT	0B0H.6
RCLK	BIT	0C8H.5
TCLK	BIT	0C8H.4
SBUF	DATA	099H
PCON	DATA	087H
SCON	DATA	098H
TMOD	DATA	089H
TCON	DATA	088H
IE0	BIT	088H.1
IE1	BIT	088H.3
B	DATA	0F0H
CP_RL2	BIT	0C8H.0
ACC	DATA	0E0H
ET0	BIT	0A8H.1
ET1	BIT	0A8H.3
TF0	BIT	088H.5
ET2	BIT	0A8H.5
TF1	BIT	088H.7
TF2	BIT	0C8H.7
RB8	BIT	098H.2
TH0	DATA	08CH
EX0	BIT	0A8H.0
IT0	BIT	088H.0
TH1	DATA	08DH
TB8	BIT	098H.3
EX1	BIT	0A8H.2
IT1	BIT	088H.2
TH2	DATA	0CDH
P	BIT	0D0H.0
SM0	BIT	098H.7
TL0	DATA	08AH
SM1	BIT	098H.6
TL1	DATA	08BH
SM2	BIT	098H.5
TL2	DATA	0CCH
PT0	BIT	0B8H.1
PT1	BIT	0B8H.3
RS0	BIT	0D0H.3
PT2	BIT	0B8H.5
TR0	BIT	088H.4
RS1	BIT	0D0H.4
TR1	BIT	088H.6
TR2	BIT	0C8H.2
PX0	BIT	0B8H.0
PX1	BIT	0B8H.2
DPH	DATA	083H
DPL	DATA	082H
EXEN2	BIT	0C8H.3
REN	BIT	098H.4
T2CON	DATA	0C8H
RXD	BIT	0B0H.0
TXD	BIT	0B0H.1
F0	BIT	0D0H.5
PSW	DATA	0D0H
?PR?_?OSTaskStkInit?OS_CPU_C             SEGMENT CODE INBLOCK 
?PR?_?OSTickISR?OS_CPU_C                 SEGMENT CODE INBLOCK 
?PR?_?OSTaskCreateHook?OS_CPU_C          SEGMENT CODE INBLOCK 
?PR?_?OSTaskDelHook?OS_CPU_C             SEGMENT CODE INBLOCK 
?PR?_?OSTaskSwHook?OS_CPU_C              SEGMENT CODE INBLOCK 
?PR?_?OSTaskStatHook?OS_CPU_C            SEGMENT CODE INBLOCK 
?PR?_?OSTimeTickHook?OS_CPU_C            SEGMENT CODE INBLOCK 
?PR?OS_CPU_C         SEGMENT CODE INBLOCK 
	EXTRN	CODE (_?OSIntExit)
	EXTRN	CODE (_?UserTickTimer)
	EXTRN	CODE (_?OSTimeTick)
	EXTRN	CODE (_?OSIntEnter)
	EXTRN	IDATA (Stack)
	EXTRN	CODE (?C?ADDXBP)
	EXTRN	CODE (?C?PSTXDATA)
	EXTRN	CODE (?C?XBPOFF)
	EXTRN	CODE (?C?PLDXDATA)
	EXTRN	DATA (?C_XBP)
	EXTRN	CODE (?C?IILDX)
	EXTRN	CODE (?C?ISTPTR)
	EXTRN	CODE (?C?PILDXDATA)
	EXTRN	CODE (?C?CSTPTR)
	EXTRN	CODE (?C?PSTPTR)
	PUBLIC	_?OSTimeTickHook
	PUBLIC	_?OSTaskStatHook
	PUBLIC	_?OSTaskSwHook
	PUBLIC	_?OSTaskDelHook
	PUBLIC	_?OSTaskCreateHook
	PUBLIC	_?OSTickISR
	PUBLIC	_?OSTaskStkInit
; /*
; *********************************************************************************************************
; *                                               uC/OS-II
; *                                         The Real-Time Kernel
; *
; *                        (c) Copyright 1992-1998, Jean J. Labrosse, Plantation, FL
; *                                          All Rights Reserved
; *
; *
; *                                       80x86/80x88 Specific code
; *                                          LARGE MEMORY MODEL
; *
; * File : OS_CPU_C.C
; * By   : Jean J. Labrosse
; *
; *
; * Ported date:     MAY 29, 2002
; * By:              Junmin Zheng, China, ([e-mail])
; * Target platform: Keil C51 V6.20
; *         
; *********************************************************************************************************
; */
; 
; #define  OS_CPU_GLOBALS
; #include "..\mainfile\includes.h"
; #include "..\function\os_kcdef.h"
; /*
; *********************************************************************************************************
; *                                        INITIALIZE A TASK'S STACK
; *
; * Description: This function is called by either OSTaskCreate() or OSTaskCreateExt() to initialize the
; *              stack frame of the task being created.  This function is highly processor specific.
; *
; * Arguments  : task          is a pointer to the task code
; *
; *              pdata         is a pointer to a user supplied data area that will be passed to the task
; *                            when the task first executes.
; *
; *              ptos          is a pointer to the top of stack.  It is assumed that 'ptos' points to
; *                            a 'free' entry on the task stack.  If OS_STK_GROWTH is set to 1 then 
; *                            'ptos' will contain the HIGHEST valid address of the stack.  Similarly, if
; *                            OS_STK_GROWTH is set to 0, the 'ptos' will contains the LOWEST valid address
; *                            of the stack.
; *
; *              opt           specifies options that can be used to alter the behavior of OSTaskStkInit().
; *                            (see uCOS_II.H for OS_TASK_OPT_???).
; *
; * Returns    : Always returns the location of the new top-of-stack' once the processor registers have
; *              been placed on the stack in the proper order.
; *
; * Note(s)    : Interrupts are enabled when your task starts executing. You can change this by setting the
; *              PSW to 0x0002 instead.  In this case, interrupts would be disabled upon task startup.  The
; *              application code would be responsible for enabling interrupts at the beginning of the task
; *              code.  You will need to modify OSTaskIdle() and OSTaskStat() so that they enable 
; *              interrupts.  Failure to do this will make your system crash!
; *********************************************************************************************************
; */
; 
; /* The stack variable points to the start pointer in hardware stack and is defined in OS_CPU_A */
; extern idata unsigned char Stack[1];
; 

	RSEG  ?PR?OS_CPU_C
Com0008:
L?0009:
	USING	0
L?0010:
	LCALL	?C?CSTPTR
L?0011:
	MOV  	DPH,?C_XBP
	MOV  	DPL,?C_XBP+01H
	MOV  	A,#0FFH
	MOV  	B,A
	LJMP 	?C?PILDXDATA
L?0012:
	USING	0
	MOV  	DPH,?C_XBP
	MOV  	DPL,?C_XBP+01H
	INC  	DPTR
	MOV  	A,#0FFH
	MOV  	B,#0FEH
	LCALL	?C?IILDX
	MOV  	DPTR,#03H
	LCALL	?C?XBPOFF
	LCALL	?C?PLDXDATA
	MOV  	R6,AR2
	MOV  	R7,AR1
L?0013:
	MOV  	DPH,?C_XBP
	MOV  	DPL,?C_XBP+01H
	RET  	
L?0014:
	USING	0
L?0015:
	MOV  	DPTR,#0FFFDH
	LCALL	?C?ADDXBP
	LJMP 	?C?PSTXDATA
L?0016:
	USING	0
	LCALL	?C?PLDXDATA
	MOV  	A,R6
	MOV  	B,R7
	LJMP 	?C?ISTPTR
; END OF Com0008

; OS_STK *OSTaskStkInit (void (*task)(void *pd) KCREENTRANT, void * vd, OS_STK *ptos, INT16U opt) KCREENTRANT

	RSEG  ?PR?_?OSTaskStkInit?OS_CPU_C
_?OSTaskStkInit:
	USING	0
			; SOURCE LINE # 62
	LCALL	L?0014
	MOV  	DPTR,#0FFFDH
	LCALL	?C?ADDXBP
; {   
; 	INT8U * stk;
;     opt    = opt;                           /* 'opt' is not used, prevent warning                      */
			; SOURCE LINE # 65
	MOV  	DPTR,#0CH
	LCALL	?C?XBPOFF
	MOVX 	A,@DPTR
	MOV  	R6,A
	INC  	DPTR
	MOVX 	A,@DPTR
	MOV  	R7,A
	MOV  	DPTR,#0CH
	LCALL	?C?XBPOFF
	MOV  	A,R6
	MOVX 	@DPTR,A
	INC  	DPTR
	MOV  	A,R7
	MOVX 	@DPTR,A
;     stk    = (INT8U *) ptos;                /* Load stack pointer                                      */
			; SOURCE LINE # 66
	MOV  	DPTR,#09H
	LCALL	?C?XBPOFF
	LCALL	?C?PLDXDATA
	LCALL	L?0013
	LCALL	?C?PSTXDATA
; 
; 	stk				-= sizeof(INT16U);      /* The value should be loaded to PC    */
			; SOURCE LINE # 68
; 	*(INT16U*)stk	 = (INT16U) task;       /* next time when this task is running */
			; SOURCE LINE # 69
	LCALL	L?0012
	LCALL	L?0016
; 
; 	stk				-= sizeof(INT16U);      /* The value should be loaded to PC    */
			; SOURCE LINE # 71
; 	*(INT16U*)stk	 = (INT16U) task;       /* next time when this task is running */
			; SOURCE LINE # 72
	LCALL	L?0012
	LCALL	L?0016
; 
; /* Following is the registers pushed into hardware stack */
; 	*--stk			 = 'A';                 /* ACC */
			; SOURCE LINE # 75
	LCALL	L?0011
	MOV  	A,#041H
; 	*--stk			 = 'B';                 /* B   */
			; SOURCE LINE # 76
	LCALL	L?0009
	MOV  	A,#042H
; 	*--stk			 = 'L';                 /* DPL */
			; SOURCE LINE # 77
	LCALL	L?0009
	MOV  	A,#04CH
; 	*--stk			 = 'H';                 /* DPH */
			; SOURCE LINE # 78
	LCALL	L?0010
	MOV  	A,#048H
; 	*--stk			 = PSW;					/* PSW */
			; SOURCE LINE # 79
	LCALL	L?0010
	MOV  	A,PSW