| // SPDX-License-Identifier: GPL-2.0 | |
| #include "cacheline.h" | |
| #include <unistd.h> | |
| #ifdef _SC_LEVEL1_DCACHE_LINESIZE | |
| #define cache_line_size(cacheline_sizep) *cacheline_sizep = sysconf(_SC_LEVEL1_DCACHE_LINESIZE) | |
| #else | |
| #include <api/fs/fs.h> | |
| #include "debug.h" | |
| static void cache_line_size(int *cacheline_sizep) | |
| { | |
| if (sysfs__read_int("devices/system/cpu/cpu0/cache/index0/coherency_line_size", cacheline_sizep)) | |
| pr_debug("cannot determine cache line size"); | |
| } | |
| #endif | |
| int cacheline_size(void) | |
| { | |
| static int size; | |
| if (!size) | |
| cache_line_size(&size); | |
| return size; | |
| } |