####################################################################### Copyright (c) 2004 Xilinx, Inc.  All rights reserved. # # Xilinx, Inc. # XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS" AS A # COURTESY TO YOU.  BY PROVIDING THIS DESIGN, CODE, OR INFORMATION AS # ONE POSSIBLE   IMPLEMENTATION OF THIS FEATURE, APPLICATION OR # STANDARD, XILINX IS MAKING NO REPRESENTATION THAT THIS IMPLEMENTATION # IS FREE FROM ANY CLAIMS OF INFRINGEMENT, AND YOU ARE RESPONSIBLE # FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE FOR YOUR IMPLEMENTATION. # XILINX EXPRESSLY DISCLAIMS ANY WARRANTY WHATSOEVER WITH RESPECT TO # THE ADEQUACY OF THE IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO # ANY WARRANTIES OR REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE # FROM CLAIMS OF INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY # AND FITNESS FOR A PARTICULAR PURPOSE. # # File   : microblaze_update_icache.s# Date   : 2003, September 24# Company: Xilinx# Group  : Emerging Software Technologies## Summary:# Update icache on the microblaze.# Takes in three parameters#	r5 : Cache Tag Line#	r6 : Cache Data#	r7 : Lock/Valid information#		Bit 30 is Lock  [ 1 indicates locked ]#		Bit 31 is Valid [ 1 indicates valid ]##	--------------------------------------------------------------#	|  Lock	 |     Valid  | Effect#	--------------------------------------------------------------#	|   0    |      0     | Invalidate Cache#       |   0    |      1     | Valid, but unlocked cacheline#       |   1    |      0     | Invalidate Cache, No effect of lock#       |   1    |      1     | Valid cache. Locked to a #       |        |            | particular addrees#	--------------------------------------------------------------## $Id: microblaze_update_icache.s,v 1.3 2004/08/17 05:01:59 sid Exp $#####################################################################		.text	.globl	microblaze_update_icache	.ent	microblaze_update_icache	.align	2microblaze_update_icache:# Read the MSR register into a temp register	mfs	r18, rmsr# Clear the icache enable bit to disable the cache# Register r10,r18 are  volatile registers and hence do not need to be saved before use	andi	r10, r18, ~32	mts	rmsr, r10# Update the lock and valid info	andi	r5,r5,0xfffffffc	or	r5,r5,r7# Update icache	wic	r5,r6# Return	rtsd	r15, 8# Restore the MSR back	mts	rmsr,r18	.end	microblaze_update_icache