Commit | Line | Data |
---|---|---|
12500902 ACM |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | #include "cacheline.h" | |
12500902 ACM |
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" | |
10 | static 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 | ||
17 | int cacheline_size(void) | |
18 | { | |
19 | static int size; | |
20 | ||
21 | if (!size) | |
22 | cache_line_size(&size); | |
23 | ||
24 | return size; | |
25 | } |