;********************************************************************************************************
;                                               uC/OS-II
;                                         The Real-Time Kernel
;
;                          (c) Copyright 1992-2002, Jean J. Labrosse, Weston, FL
;                                          All Rights Reserved
;
; File : OS_CPU_A.ASM
; By   : Jean J. Labrosse
;********************************************************************************************************

;********************************************************************************************************
;                                               ARM7 Port
;
;                 Target           : ARM7 (Includes ARM7TDMI, ARM710T, ARM720T, ARM740T)
;                 Ported by        : Michael Anburaj
;                 URL              : http://geocities.com/michaelanburaj/    Email : michaelanburaj@hotmail.com
;
;********************************************************************************************************



        AREA  UCOS_ARM_ASM_INT, CODE, READONLY
           

;*********************************************************************************************************
;                                            IRQ HANDLER
;
;        This handles all the IRQs
;        Note: FIQ Handler should be written similar to this
;
;*********************************************************************************************************

        IMPORT  OSIntEnter
        IMPORT  OSIntExit

        IMPORT  OSIntCtxSwFlag
        IMPORT  _IntCtxSw

  
        MACRO     
$IRQ_AsmEntery HANDLER $IRQ_CEntry
        EXPORT  $IRQ_AsmEntery              ; 輸出的標(biāo)號
        IMPORT  $IRQ_CEntry                 ; 引用的外部標(biāo)號
                
$IRQ_AsmEntery
        stmfd sp!,{r0-r3,r12,lr}

        bl OSIntEnter
        bl $IRQ_CEntry
        bl OSIntExit

        ldr r0,=OSIntCtxSwFlag
        ldr r1,[r0]
        cmp r1,#1
        beq _IntCtxSw

        ldmfd sp!,{r0-r3,r12,lr}
        subs pc,lr,#4
        
        MEND
 
;所有的中斷按如下的格式在注冊(引用上面的宏定義)
;$IRQ_AsmEntery HANDLER $IRQ_CEntry


;串口0中斷
IRQASMUart0  HANDLER IRQCUart0

;串口0中斷
IRQASMUart1  HANDLER IRQCUart1


          END