10Sduke// SPDX-License-Identifier: GPL-2.0
22362Sohair#include "cacheline.h"
30Sduke#include <unistd.h>
40Sduke
50Sduke#ifdef _SC_LEVEL1_DCACHE_LINESIZE
60Sduke#define cache_line_size(cacheline_sizep) *cacheline_sizep = sysconf(_SC_LEVEL1_DCACHE_LINESIZE)
70Sduke#else
80Sduke#include <api/fs/fs.h>
90Sduke#include "debug.h"
100Sdukestatic void cache_line_size(int *cacheline_sizep)
110Sduke{
120Sduke	if (sysfs__read_int("devices/system/cpu/cpu0/cache/index0/coherency_line_size", cacheline_sizep))
130Sduke		pr_debug("cannot determine cache line size");
140Sduke}
150Sduke#endif
160Sduke
170Sdukeint cacheline_size(void)
180Sduke{
192362Sohair	static int size;
202362Sohair
212362Sohair	if (!size)
220Sduke		cache_line_size(&size);
230Sduke
240Sduke	return size;
250Sduke}
260Sduke