vectors.s

Coldfire MCF5282 DBug bootloader

	#
	# File:		vectors.s
	#
	# Purpose:	Exception vectors for MPC5XX dBUG
	#
	# Modificiations:
	#


	# Globally accessible symbols
	.global VECTOR_TABLE

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

	.global start
	
	.text

	#
	# This is the vector table for the MPC8XX.  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.
	#
vector:		.macro	NUM,HANDLER
exception_\1:
	mtspr	sprg0,r31			# save r31 in exception register 0
	mfspr	r31,lr				# save LR in exception register 1
	mtspr	sprg1,r31
	bl		next\1
next\1:
	mfspr	r31,lr
	rlwinm	r31,r31,0,0,23
	lwz		r31,vect\1 - exception_\1(r31)
	mtspr	lr,r31
	bclrl	20,0				# branch to HANDLER
vect\1:
	dc.l	HANDLER
	ds.l	64-((.-exception_\1)>>2)
			.endm


VECTOR_TABLE:

vector	0000,asm_exception_body		# reserved
start:
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		# floating point assist
vector	0F00,asm_exception_body		# reserved
vector	1000,asm_exception_body		# software emulation
vector	1100,asm_exception_body		# instruction tlb miss
vector	1200,asm_exception_body		# data tlb miss
vector	1300,asm_exception_body		# instruction tlb error
vector	1400,asm_exception_body		# data tlb error
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		# data breakpoint
vector	1D00,asm_exception_body		# instruction breakpoint
vector	1E00,asm_exception_body		# peripheral breakpoint
vector	1F00,asm_exception_body		# development port

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

	.end