diff options
Diffstat (limited to 'lib/libc')
| -rw-r--r-- | lib/libc/arch/powerpc/gen/usertc.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/lib/libc/arch/powerpc/gen/usertc.c b/lib/libc/arch/powerpc/gen/usertc.c index f73831f742e..108fff0f54f 100644 --- a/lib/libc/arch/powerpc/gen/usertc.c +++ b/lib/libc/arch/powerpc/gen/usertc.c @@ -1,4 +1,4 @@ -/* $OpenBSD: usertc.c,v 1.1 2020/07/06 13:33:05 pirofti Exp $ */ +/* $OpenBSD: usertc.c,v 1.2 2020/07/17 20:15:43 gkoehler Exp $ */ /* * Copyright (c) 2020 Paul Irofti <paul@irofti.net> * @@ -18,4 +18,24 @@ #include <sys/types.h> #include <sys/timetc.h> -int (*const _tc_get_timecount)(struct timekeep *, u_int *) = NULL; +static __inline u_int32_t +ppc_mftbl (void) +{ + int ret; + __asm volatile ("mftb %0" : "=r" (ret)); + return ret; +} + +static int +tc_get_timecount(struct timekeep *tk, u_int *tc) +{ + switch (tk->tk_user) { + case TC_TB: + *tc = ppc_mftbl(); + return 0; + } + + return -1; +} + +int (*const _tc_get_timecount)(struct timekeep *, u_int *) = tc_get_timecount; |