vectors.s

Sirf/Centrality公司GPS平台AtlasIII芯片AT640的Nboot源码

;
; Copyright (c) 2002 Palmmicro Communications Inc.  All rights reserved.
;
; --------------------------------------------------------------------
; Module Name:
;	
;   vectors.s
;	  
; Abstract:
;	
;   These exception vectors and dummy exception handlers will be
;   relocated at start-up from FLASH to 32bitRAM at address 0
;

        AREA Vect, CODE, READONLY

		ENTRY

; *****************
; Exception Vectors
; *****************

        LDR     PC, Reset_Addr
        LDR     PC, Undefined_Addr
        LDR     PC, SWI_Addr
        LDR     PC, Prefetch_Addr
        LDR     PC, Abort_Addr
        NOP                             ; Reserved vector
        LDR     PC, IRQ_Addr
        LDR     PC, FIQ_Addr
        
        IMPORT  Start_Boot              ; In boot.s
        IMPORT  Irq_Handler             ; In test.c
        IF :DEF:FIQ_ENABLE
        	IMPORT  Fiq_Handler             ; In test.c
        ENDIF
        
Reset_Addr      DCD     Start_Boot
Undefined_Addr  DCD     Undefined_Handler
SWI_Addr        DCD     SWI_Handler
Prefetch_Addr   DCD     Prefetch_Handler
Abort_Addr      DCD     Abort_Handler
                DCD     0               ; Reserved vector
IRQ_Addr        DCD     Irq_Handler
FIQ_Addr        DCD     Fiq_Handler


; ************************
; Dummy Exception Handlers
; ************************
; The following handlers do not do anything useful in this example.
; They are set up here for completeness.

Undefined_Handler
        B       Undefined_Handler
SWI_Handler
        B       SWI_Handler     
Prefetch_Handler
        B       Prefetch_Handler
Abort_Handler
        B       Abort_Handler
        
    IF :DEF: FIQ_ENABLE
	ELSE
Fiq_Handler
        B       Fiq_Handler
    ENDIF        
        
        END