1 // SPDX-License-Identifier: GPL-2.0 2 #include "cacheline.h" 3 #include <unistd.h> 4 5 #ifdef _SC_LEVEL1_DCACHE_LINESIZE 6 #define cache_line_size(cacheline_sizep) *cacheline_sizep = sysconf(_SC_LEVEL1_DCACHE_LINESIZE) 7 #else 8 #include <api/fs/fs.h> 9 #include "debug.h" cache_line_size(int * cacheline_sizep)10static void cache_line_size(int *cacheline_sizep) 11 { 12 if (sysfs__read_int("devices/system/cpu/cpu0/cache/index0/coherency_line_size", cacheline_sizep)) 13 pr_debug("cannot determine cache line size"); 14 } 15 #endif 16 cacheline_size(void)17int cacheline_size(void) 18 { 19 static int size; 20 21 if (!size) 22 cache_line_size(&size); 23 24 return size; 25 } 26