Add support for using i8254 and rtc timers as event sources for i386 SMP

system. Redistribute hard-/stat-/profclock events to other CPUs using IPI.

1 files changed, 49 insertions, 2 deletions

diff --git a/sys/i386/isa/clock.c b/sys/i386/isa/clock.c
index b908c34..989a622 100644
--- a/sys/i386/isa/clock.c
+++ b/sys/i386/isa/clock.c
@@ -57,6 +57,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/kernel.h>
 #include <sys/module.h>
 #include <sys/sched.h>
+#include <sys/smp.h>
 #include <sys/sysctl.h>
 
 #include <machine/clock.h>
@@ -69,6 +70,7 @@ __FBSDID("$FreeBSD$");
 #endif
 #include <machine/ppireg.h>
 #include <machine/timerreg.h>
+#include <machine/smp.h>
 
 #include <isa/rtc.h>
 #ifdef DEV_ISA
@@ -127,6 +129,35 @@ static struct timecounter i8254_timecounter = {
 	0			/* quality */
 };
 
+int
+hardclockintr(struct trapframe *frame)
+{
+
+	if (PCPU_GET(cpuid) == 0)
+		hardclock(TRAPF_USERMODE(frame), TRAPF_PC(frame));
+	else
+		hardclock_cpu(TRAPF_USERMODE(frame));
+	return (FILTER_HANDLED);
+}
+
+int
+statclockintr(struct trapframe *frame)
+{
+
+	if (profprocs != 0)
+		profclock(TRAPF_USERMODE(frame), TRAPF_PC(frame));
+	statclock(TRAPF_USERMODE(frame));
+	return (FILTER_HANDLED);
+}
+
+int
+profclockintr(struct trapframe *frame)
+{
+
+	profclock(TRAPF_USERMODE(frame), TRAPF_PC(frame));
+	return (FILTER_HANDLED);
+}
+
 static int
 clkintr(struct trapframe *frame)
 {
@@ -155,7 +186,14 @@ clkintr(struct trapframe *frame)
 		(*lapic_cyclic_clock_func[cpu])(frame);
 #endif
 
-	hardclock(TRAPF_USERMODE(frame), TRAPF_PC(frame));
+#ifdef SMP
+	if (smp_started)
+		ipi_all_but_self(IPI_HARDCLOCK);
+#endif 
+	if (PCPU_GET(cpuid) == 0)
+		hardclock(TRAPF_USERMODE(frame), TRAPF_PC(frame));
+	else
+		hardclock_cpu(TRAPF_USERMODE(frame));
 #ifdef DEV_MCA
 	/* Reset clock interrupt by asserting bit 7 of port 0x61 */
 	if (MCA_system)
@@ -241,10 +279,19 @@ rtcintr(struct trapframe *frame)
 		if (profprocs != 0) {
 			if (--pscnt == 0)
 				pscnt = psdiv;
+#ifdef SMP
+			if (pscnt != psdiv && smp_started)
+				ipi_all_but_self(IPI_PROFCLOCK);
+#endif
 			profclock(TRAPF_USERMODE(frame), TRAPF_PC(frame));
 		}
-		if (pscnt == psdiv)
+		if (pscnt == psdiv) {
+#ifdef SMP
+			if (smp_started) 
+				ipi_all_but_self(IPI_STATCLOCK); 
+#endif
 			statclock(TRAPF_USERMODE(frame));
+		}
 	}
 	return(flag ? FILTER_HANDLED : FILTER_STRAY);
 }