except.a

AT91所有开发板的资料 AT91所有开发板的资料

;
; $Revision: 1.2 $
;   $Author: mechavar $
;     $Date: 2000/05/01 19:37:08 $
;
; Copyright (c) 2000 ARM, INC.
; All Rights Reserved
;
; ---------------------------------------------------------------------

BTZ_HANDLER		EQU	0
UNDEF_HANDLER		EQU	1
SWI_HANDLER		EQU	2
PREFETCH_HANDLER	EQU	3
ABORT_HANDLER		EQU	4
ADDRESS_HANDLER		EQU	5
IRQ_HANDLER		EQU	6
FIQ_HANDLER		EQU	7
ERROR_HANDLER		EQU	8
NHANDLERS		EQU	9

Mode_Bits	EQU	0x1f
User_Mode_Bits	EQU	0x0f
SVC_Mode	EQU	0x13


	IMPORT	uHALiv_MemorySize

	; -----------------
	; The demon exception handler wants to reset the SVC stack. This macro
	; makes it possible in a uHAL centered world.

	; Caller must already be in SVC mode
	; !! Corrupts r0 and SVC stack pointer.

	MACRO
	RESET_SVC_STACK

	LDR	r0, =uHALiv_MemorySize
	LDR	r0, [r0]
	SUB	r0, r0, #(UndefStackSize + IRQStackSize)
	MOV	sp, r0
	MEND
	
	END