callout_cache_dummy.s

来自「qnx powerpc MPC8245的 BSP源文件」· S 代码 · 共 42 行

#  
# Copyright 2007, QNX Software Systems. 
#  
# Licensed under the Apache License, Version 2.0 (the "License"). You 
# may not reproduce, modify or distribute this software except in 
# compliance with the License. You may obtain a copy of the License 
# at: http://www.apache.org/licenses/LICENSE-2.0 
#  
# Unless required by applicable law or agreed to in writing, software 
# distributed under the License is distributed on an "AS IS" basis, 
# WITHOUT WARRANTIES OF ANY KIND, either express or implied.
# 
# This file may contain contributions from others, either as 
# contributors under the License or as licensors under other terms.  
# Please review this entire file for other proprietary rights or license 
# notices, as well as the QNX Development Suite License Guide at 
# http://licensing.qnx.com/license-guide/ for other information.
# 
# This is a kernel hardware callout.
# This code MUST be position independant.
#

	.include "callout.ah"

#
# unsigned control(	paddr32_t base,
#					unsigned num_lines,
#					int flags,
#					struct cacheattr_entry *cache,
#					volatile struct syspage_entry * )

#
# Perform the cache controller operations indicated by 'flags' 
# (MS_* bits passed to the msync() function).
# This implementation is just a dummy.
#
CALLOUT_START	cache_dummy, 0, 0
		li	%r3,0		# return that all lines were affected
		blr
CALLOUT_END		cache_dummy