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/**************************************************************************
*
* Copyright (c) 2013 Alcatel-Lucent
*
* Alcatel Lucent licenses this file to You under the Apache License,
* Version 2.0 (the "License"); you may not use this file except in
* compliance with the License. A copy of the License is contained the
* file LICENSE at the top level of this repository.
* You may also 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 OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
**************************************************************************
*
* cache.c:
* This code is the front-end to CPU-specific code that may or may not
* support basic I & D cache operations. Various facilities in the
* monitor call the wrapper functions below for carrying out cpu-specific
* cache operations. This code provides that wrapper allowing the other
* portions of the monitor to be unaware of what the specific CPU actually
* supports.
*
* The cacheInit() function must be called at monitor startup, then
* cacheInit() calls cacheInitForTarget(), a function that must be provided
* by the target-specific code to fill in the CPU-specific functionality.
* This function should establish the cache as it is to be used in
* the monitor (typically i-cache enabled, d-cache disabled), plus, if
* applicable, the dcacheFlush and icacheInvalidate function pointers should
* be initialized to CPU-specific functions that match the API...
*
* int (*dcacheDisable)(void);
* int (*icacheDisable)(void);
* int (*dcacheFlush)(char *base,int size);
* int (*icacheInvalidate)(char *base, int size);
*
*
* Original author: Ed Sutter (ed.sutter@alcatel-lucent.com)
*
*/
#include "genlib.h"
#include "cache.h"
int (*dcacheFlush)(char *,int), (*icacheInvalidate)(char *, int);
int (*dcacheDisable)(void), (*icacheDisable)(void);
/* flushDcache():
* Flush the address range specified, or if address and size are both
* zero, flush the entire D-Cache.
*/
int
flushDcache(char *addr, int size)
{
/* The dcacheFlush function pointer should be initialized in the
* port-specific function "cacheInitForTarget".
*/
if (dcacheFlush)
return(dcacheFlush(addr,size));
return(0);
}
/* disableDcache():
* Disable data cache.
*/
int
disableDcache(void)
{
/* The dcacheDisable function pointer should be initialized in the
* port-specific function "cacheInitForTarget".
*/
if (dcacheDisable)
return(dcacheDisable());
return(0);
}
/* invalidateIcache():
* Invalidate the address range specified, or if address and size are both
* zero, invalidate the entire I-Cache.
*/
int
invalidateIcache(char *addr, int size)
{
/* The icacheInvalidate function pointer should be initialized in the
* port-specific function "cacheInitForTarget".
*/
if (icacheInvalidate)
return(icacheInvalidate(addr,size));
return(0);
}
/* disableIcache():
* Disable instruction cache.
*/
int
disableIcache(void)
{
/* The icacheDisable function pointer should be initialized in the
* port-specific function "cacheInitForTarget".
*/
if (icacheDisable)
return(icacheDisable());
return(0);
}
int
cacheInit()
{
dcacheDisable = (int(*)(void))0;
icacheDisable = (int(*)(void))0;
dcacheFlush = (int(*)(char *,int))0;
icacheInvalidate = (int(*)(char *,int))0;
cacheInitForTarget(); /* Target-specific initialization. */
return(0);
}
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