mx21_vectors.s

来自「MX21_InitCodeLib.rar freescale mx21系列AR」· S 代码 · 共 89 行

;;**********************************************************************
;;
;;        (C) COPYRIGHT 2004 FREESCALE, INC.
;;         ALL RIGHTS RESERVED
;;
;;
;;     Group/Division:  WMSG/MMDO
;;
;;     Description:
;;     Interrupt vector setup file created for
;;     the Metrowerks assembler
;;
;;     Related Specifications:
;;
;;     Errata:
;;
;;     File Name:        MX21_PageTable.s
;;     Revision Number:  0.1
;;     Author(s):        Sharad Kumar
;;     Date created:     30Apr2004
;;     Revision History:
;;        Date      Rev     Description
;;        ----      ---     -----------
;;        30Apr04  0.1     First draft
;;
;;*********************************************************************/


        .section vectors
       	.global Vector_Init_Block

; Note: LDR PC instructions are used here because branch (B) instructions
; could not simply be copied (the branch offsets would be wrong).  Also,
; a branch instruction might not reach if the ROM is at an address >32MB).
        
Vector_Init_Block:

        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
        
        .extern  mx21_Init
;;        .extern  __init_user

                
Reset_Addr      .long     mx21_Init
;;Reset_Addr      .long     __init_user
Undefined_Addr  .long     Undefined_Handler
SWI_Addr        .long     SWI_Handler
Prefetch_Addr   .long     Prefetch_Handler
Abort_Addr      .long     Abort_Handler
                .long     0               ; Reserved vector
IRQ_Addr        .long     IRQ_Handler
FIQ_Addr        .long     FIQ_Handler


; ************************
; Exception Handlers
; ************************
          

        .extern	C_Undefined_Handler
        .extern	C_SWI_Handler
        .extern	C_Prefetch_Handler
        .extern	C_Abort_Handler
        .extern	C_IRQ_Handler
        .extern	C_FIQ_Handler



Undefined_Handler
        B       C_Undefined_Handler
SWI_Handler
        B       C_SWI_Handler     
Prefetch_Handler
        B       C_Prefetch_Handler
Abort_Handler
        B       C_Abort_Handler
IRQ_Handler
        B       C_IRQ_Handler
FIQ_Handler
        B       C_FIQ_Handler