You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
54 lines
1.7 KiB
C
54 lines
1.7 KiB
C
/* arm32le.c
|
|
* Copyright 1984-2017 Cisco Systems, Inc.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file 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 OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include "system.h"
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/mman.h>
|
|
|
|
/* we don't count on having the right value for correctness,
|
|
* but the right value will give maximum efficiency */
|
|
#define DEFAULT_L1_MAX_CACHE_LINE_SIZE 32
|
|
|
|
static int l1_max_cache_line_size;
|
|
|
|
/* flushcache_max_gap is the maximum gap between unmerged chunks of memory to be flushed */
|
|
INT S_flushcache_max_gap(void) {
|
|
return l1_max_cache_line_size;
|
|
}
|
|
|
|
void S_doflush(uptr start, uptr end) {
|
|
#ifdef DEBUG
|
|
printf(" doflush(%x, %x)\n", start, end); fflush(stdout);
|
|
#endif
|
|
|
|
__clear_cache((char *)start, (char *)end);
|
|
}
|
|
|
|
void S_machine_init(void) {
|
|
int l1_dcache_line_size, l1_icache_line_size;
|
|
|
|
#ifdef _SC_LEVEL1_DCACHE_LINESIZE
|
|
if ((l1_dcache_line_size = sysconf(_SC_LEVEL1_DCACHE_LINESIZE)) <= 0)
|
|
#endif
|
|
l1_dcache_line_size = DEFAULT_L1_MAX_CACHE_LINE_SIZE;
|
|
#ifdef _SC_LEVEL1_ICACHE_LINESIZE
|
|
if ((l1_icache_line_size = sysconf(_SC_LEVEL1_ICACHE_LINESIZE)) <= 0)
|
|
#endif
|
|
l1_icache_line_size = DEFAULT_L1_MAX_CACHE_LINE_SIZE;
|
|
l1_max_cache_line_size = l1_dcache_line_size > l1_icache_line_size ? l1_dcache_line_size : l1_icache_line_size;
|
|
}
|