www.pudn.com > AN-1256.zip > os_cpu_i.s90

;******************************************************************************************************** 
;                                               uC/OS-II 
;                                         The Real-Time Kernel 
; 
;                                       ATmega256  Specific code 
; 
;                                             INCLUDE FILE 
; 
; File     : OS_CPU_I.S90 
; By       : Jean J. Labrosse 
;******************************************************************************************************** 
; 
;******************************************************************************************************** 
;                                            BIT DEFINITIONS 
;******************************************************************************************************** 
 
BIT00   = 0x01 
BIT01   = 0x02 
BIT02   = 0x04 
BIT03   = 0x08 
BIT04   = 0x10 
BIT05   = 0x20 
BIT06   = 0x40 
BIT07   = 0x80 
 
;******************************************************************************************************** 
;                                           I/O PORT ADDRESSES 
;******************************************************************************************************** 
 
SREG    = 0x3F 
SPH     = 0x3E 
SPL     = 0x3D 
RAMPZ   = 0x3B 
EIND    = 0x3C 
 
;******************************************************************************************************** 
;                                                MACROS 
;******************************************************************************************************** 
 
PUSH_ALL        MACRO                               ; Save all registers 
                ST      -Y,R0 
                ST      -Y,R1 
                ST      -Y,R2 
                ST      -Y,R3 
                ST      -Y,R4 
                ST      -Y,R5 
                ST      -Y,R6 
                ST      -Y,R7 
                ST      -Y,R8 
                ST      -Y,R9 
                ST      -Y,R10 
                ST      -Y,R11 
                ST      -Y,R12 
                ST      -Y,R13 
                ST      -Y,R14 
                ST      -Y,R15 
                ST      -Y,R16 
                ST      -Y,R17 
                ST      -Y,R18 
                ST      -Y,R19 
                ST      -Y,R20 
                ST      -Y,R21 
                ST      -Y,R22 
                ST      -Y,R23 
                ST      -Y,R24 
                ST      -Y,R25 
                ST      -Y,R26 
                ST      -Y,R27 
                ST      -Y,R30 
                ST      -Y,R31 
                IN      R16,RAMPZ 
                ST      -Y,R16 
                IN      R16,EIND 
                ST      -Y,R16 
                ENDM 
 
POP_ALL         MACRO                               ; Restore all registers 
                LD      R16,Y+ 
                OUT     EIND,R16 
                LD      R16,Y+ 
                OUT     RAMPZ,R16 
                LD      R31,Y+ 
                LD      R30,Y+ 
                LD      R27,Y+ 
                LD      R26,Y+ 
                LD      R25,Y+ 
                LD      R24,Y+ 
                LD      R23,Y+ 
                LD      R22,Y+ 
                LD      R21,Y+ 
                LD      R20,Y+ 
                LD      R19,Y+ 
                LD      R18,Y+ 
                LD      R17,Y+ 
                LD      R16,Y+ 
                LD      R15,Y+ 
                LD      R14,Y+ 
                LD      R13,Y+ 
                LD      R12,Y+ 
                LD      R11,Y+ 
                LD      R10,Y+ 
                LD      R9,Y+ 
                LD      R8,Y+ 
                LD      R7,Y+ 
                LD      R6,Y+ 
                LD      R5,Y+ 
                LD      R4,Y+ 
                LD      R3,Y+ 
                LD      R2,Y+ 
                LD      R1,Y+ 
                LD      R0,Y+ 
                ENDM 
 
PUSH_SP         MACRO                               ; Save stack pointer 
                IN      R16,SPH 
                ST      -Y,R16 
                IN      R16,SPL 
                ST      -Y,R16 
                ENDM 
 
POP_SP          MACRO                               ; Restore stack pointer 
                LD      R16,Y+ 
                OUT     SPL,R16 
                LD      R16,Y+ 
                OUT     SPH,R16 
                ENDM 
 
PUSH_SREG       MACRO                               ; Save status register 
                IN      R16,SREG 
                ST      -Y,R16 
                ENDM 
 
POP_SREG        MACRO                               ; Restore status registers 
                LD      R16,Y+ 
                OUT     SREG,R16 
                ENDM 
 
PUSH_SREG_INT   MACRO                               ; Save status register with interrupts ENABLED 
                IN      R16,SREG 
                SBR     R16,BIT07 
                ST      -Y,R16 
                ENDM 
 
POP_SREG_INT    MACRO                               ; Restore status registers but DISABLE interrupts 
                LD      R16,Y+ 
                CBR     R16,BIT07 
                OUT     SREG,R16 
                ENDM