diff options
author | John Birrell <jb@FreeBSD.org> | 2008-05-24 06:27:54 +0000 |
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committer | John Birrell <jb@FreeBSD.org> | 2008-05-24 06:27:54 +0000 |
commit | f1bd3c150c21a75b520a3fb25e23f47beb3224eb (patch) | |
tree | 79b46428e0d7daf270d5fbbb1cdbd0a13edd372c /sys/i386/isa/clock.c | |
parent | 15653bada1af513299ba17e0463fa7eaa99cfbff (diff) | |
download | src-f1bd3c150c21a75b520a3fb25e23f47beb3224eb.tar.gz src-f1bd3c150c21a75b520a3fb25e23f47beb3224eb.zip |
Add a cyclic hook for DTrace.
Notes
Notes:
svn path=/head/; revision=179278
Diffstat (limited to 'sys/i386/isa/clock.c')
-rw-r--r-- | sys/i386/isa/clock.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/sys/i386/isa/clock.c b/sys/i386/isa/clock.c index 93a06a3b9a13..b908c3476045 100644 --- a/sys/i386/isa/clock.c +++ b/sys/i386/isa/clock.c @@ -41,6 +41,7 @@ __FBSDID("$FreeBSD$"); #include "opt_apic.h" #include "opt_clock.h" +#include "opt_kdtrace.h" #include "opt_isa.h" #include "opt_mca.h" #include "opt_xbox.h" @@ -79,6 +80,10 @@ __FBSDID("$FreeBSD$"); #include <i386/bios/mca_machdep.h> #endif +#ifdef KDTRACE_HOOKS +#include <sys/dtrace_bsd.h> +#endif + #define TIMER_DIV(x) ((i8254_freq + (x) / 2) / (x)) int clkintr_pending; @@ -138,6 +143,18 @@ clkintr(struct trapframe *frame) mtx_unlock_spin(&clock_lock); } KASSERT(!using_lapic_timer, ("clk interrupt enabled with lapic timer")); + +#ifdef KDTRACE_HOOKS + /* + * If the DTrace hooks are configured and a callback function + * has been registered, then call it to process the high speed + * timers. + */ + int cpu = PCPU_GET(cpuid); + if (lapic_cyclic_clock_func[cpu] != NULL) + (*lapic_cyclic_clock_func[cpu])(frame); +#endif + hardclock(TRAPF_USERMODE(frame), TRAPF_PC(frame)); #ifdef DEV_MCA /* Reset clock interrupt by asserting bit 7 of port 0x61 */ |