David Venhoff
cfcea9ee67
Based off b80915eb99
and compacted into a single commit so that it will fit on the uni git server
26 lines
568 B
C
26 lines
568 B
C
// SPDX-License-Identifier: GPL-2.0
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#include "cacheline.h"
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#include <unistd.h>
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#ifdef _SC_LEVEL1_DCACHE_LINESIZE
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#define cache_line_size(cacheline_sizep) *cacheline_sizep = sysconf(_SC_LEVEL1_DCACHE_LINESIZE)
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#else
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#include <api/fs/fs.h>
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#include "debug.h"
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static void cache_line_size(int *cacheline_sizep)
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{
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if (sysfs__read_int("devices/system/cpu/cpu0/cache/index0/coherency_line_size", cacheline_sizep))
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pr_debug("cannot determine cache line size");
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}
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#endif
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int cacheline_size(void)
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{
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static int size;
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if (!size)
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cache_line_size(&size);
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return size;
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}
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