asm_exc_handler.s

COG-VP12864液晶屏驱动代码及对应RTC实例

/*
********************************************************
// Copyright (c)2004 Ark Pioneer Microelectronics Ltd.,
// All Rights Reserved
//
// Filename: asm_exc_handler.s
// Version: 1.0
// Created: 2004.03.04   By: Philip
*********************************************************
*/

#include <stackframe.h>
#include <asm.h>
#include <cpureg.h>
#include <mipsreg.h>

 	.set noreorder
# Cold reset, soft reset, NMI -------------------------------
 # 0xbfc0 0000
 	.globl Reset
 	.ent Reset	

 Reset:
 		mfc0  k0, CP0_STATUS
 		li    k1, 0x00100000	/* ST0_SR */
 		and   k1, k1, k0
 		bne   k1, zero, NMI_exception
 		nop 		
	# Describe processing for cold reset exception
 		
 		j Reset
 		nop
 		
NMI_exception:
 	# Add processings for soft reset and NMI exception
 		
		j Reset
		nop
		
	.end Reset

# TLB exception ----------------------------------------------

 	.globl TLB_exception
 	.ent TLB_exception 	

TLB_exception:
	# Describe processing for TLB exception
	
 		j Reset
 		nop
 	
	.end TLB_exception

# XTLB exception --------------------------------------------

	.globl XTLB_exception
	.ent XTLB_exception

XTLB_exception:
	# Describe processing for XTLB exception

		j Reset
		nop
		
	.end XTLB_exception

# Cache error exception ------------------------------------

	.globl Cache_error
	.ent Cache_error

Cache_error:
	# Describe processing for cache error exception
	
		j Reset
		nop
		
	.end Cache_error

# Other exceptions ------------------------------------------

 	.globl OTHER_exception
 	.ent OTHER_exception
 	
OTHER_exception:

	/* nothing to do, we do in ExceptionProcess routine */
 	
 .end OTHER_exception