vectors.s

motorola自己开发的针对coldfire 5272的Dbug bootloader程序

	#
	# File:		vectors.s
	#
	# Purpose:	Exception vectors for MPC6XX dBUG.
	#
	# Author:	Eric DeVolder
	#
	# Date:
	#
	# Modificiations:
	#
	#

	# Globally accessible symbols
	.global VECTOR_TABLE

	.extern asm_startmeup
	.extern asm_exception_body
	.extern asm_isr_handler
	.extern dbug_sc_handler

######################################################################

	.text

# This is the vector table for the MPC6XX.  It is placed here so that it
# can be in a FLASH/ROM at bootup to initialize the system.  All of the
# exceptions use a generic "exception header" before branching to the
# actual handler.
#
# This file MUST be the first file linked in order for this code to be
# ROM-able.
#
	.macro	vector NUM,HANDLER
exception_\NUM:
	mtspr	272,31
	mfspr	31,8
	mtspr	273,31
	bl		next\NUM
next\NUM:
	mfspr	31,8
	rlwinm	31,31,0,0,23
	lwz		31,vect\NUM-exception_\NUM(r31)
	mtspr	8,31
	bclrl	20,0
vect\NUM:
	.long	\HANDLER
	.space	256-(10*4),0
			.endm


VECTOR_TABLE:

vector	0000,asm_exception_body		# reserved
vector	0100,asm_startmeup			# hard reset
vector	0200,asm_exception_body		# machine check
vector	0300,asm_exception_body		# data access
vector	0400,asm_exception_body		# instruction access
vector	0500,asm_isr_handler		# external interrupt
vector	0600,asm_exception_body		# alignment
vector	0700,asm_exception_body		# program
vector	0800,asm_exception_body		# floating-point unavail
vector	0900,asm_isr_handler		# decrementer
vector	0A00,asm_exception_body		# reserved
vector	0B00,asm_exception_body		# reserved
vector	0C00,dbug_sc_handler		# system call
vector	0D00,asm_exception_body		# trace
vector	0E00,asm_exception_body		# reserved
vector	0F00,asm_exception_body		# performance monitor
vector	1000,asm_exception_body		# instruction tlb miss
vector	1100,asm_exception_body		# data tlb miss
vector	1200,asm_exception_body		# data store tlb miss
vector	1300,asm_exception_body		# instruction breakpoint
vector	1400,asm_exception_body		# system management interrupt
vector	1500,asm_exception_body		# reserved
vector	1600,asm_exception_body		# reserved
vector	1700,asm_exception_body		# reserved
vector	1800,asm_exception_body		# reserved
vector	1900,asm_exception_body		# reserved
vector	1A00,asm_exception_body		# reserved
vector	1B00,asm_exception_body		# reserved
vector	1C00,asm_exception_body		# reserved
vector	1D00,asm_exception_body		# reserved
vector	1E00,asm_exception_body		# reserved
vector	1F00,asm_exception_body		# reserved

######################################################################

	.end