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wolfEntropy: Add ARM Generic Timer virtual counter as time src

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This commit is contained in:
Lealem Amedie
2026-02-11 20:35:50 -07:00
parent 1c77414798
commit 17287cd595
1 changed files with 14 additions and 0 deletions
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wolfcrypt/src/wolfentropy.c
+14
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@@ -155,6 +155,20 @@ static WC_INLINE word64 Entropy_TimeHiRes(void)
QueryPerformanceCounter(&count);
return (word64)(count.QuadPart);
}
#elif !defined(ENTROPY_MEMUSE_THREAD) && defined(__arm__)
/* Get time counter from arch_sys_counter clocksource.
*
* @return 64-bit timer count.
*/
static WC_INLINE word64 Entropy_TimeHiRes(void)
{
word32 lo, hi;
__asm__ __volatile__ (
"mrrc p15, 1, %[lo], %[hi], c14"
: [lo] "=r"(lo), [hi] "=r"(hi)
);
return ((word64)hi << 32) | lo;
}
#elif defined(WOLFSSL_THREAD_NO_JOIN)
/* Start and stop thread that counts as a proxy for time counter. */