| // 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; |
| } |
