The branch main has been updated by cperciva:
URL:
https://cgit.FreeBSD.org/src/commit/?id=e6caac717b4fc2b87cf93f67109884e768253e77
commit e6caac717b4fc2b87cf93f67109884e768253e77
Author: Colin Percival <cperc...@freebsd.org>
AuthorDate: 2021-06-24 05:21:23 +0000
Commit: Colin Percival <cperc...@freebsd.org>
CommitDate: 2021-06-24 05:21:23 +0000
libsa: Add tslog support for arm64
The original code only supported x86 and used rdtsc(); we now also
support arm64 and use the CNTVCT_EL0 special register.
---
stand/libsa/tslog.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/stand/libsa/tslog.c b/stand/libsa/tslog.c
index 7ea18e0bb8f8..c6164aab02a9 100644
--- a/stand/libsa/tslog.c
+++ b/stand/libsa/tslog.c
@@ -29,7 +29,11 @@ __FBSDID("$FreeBSD$");
#include <sys/types.h>
+#if defined(__amd64__) || defined(__i386__)
#include <machine/cpufunc.h>
+#elif defined(__aarch64__)
+#include <machine/armreg.h>
+#endif
#include <stand.h>
@@ -60,6 +64,8 @@ tslog(const char * type, const char * f, const char * s)
{
#if defined(__amd64__) || defined(__i386__)
uint64_t tsc = rdtsc();
+#elif defined(__aarch64__)
+ uint64_t tsc = READ_SPECIALREG(cntvct_el0);
#else
uint64_t tsc = 0;
#endif
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