From 59b8fa3c0ef4798eabf4428a5c9071c6dfa81159 Mon Sep 17 00:00:00 2001
From: Kanoj Sarcar <kanoj@engr.sgi.com>
Date: Mon, 27 Mar 2000 00:52:39 +0000
Subject: ip27-timer.c: The timer interrupt for SMP machines must do some extra
 scheduling related tasks. smp.c: create a stub to flush tlbs on other
 processors.

---
 arch/mips64/kernel/smp.c          |  6 ++++++
 arch/mips64/sgi-ip27/ip27-timer.c | 31 ++++++++++++++++++++++++++++++-
 2 files changed, 36 insertions(+), 1 deletion(-)

diff --git a/arch/mips64/kernel/smp.c b/arch/mips64/kernel/smp.c
index 05931794d..d72e97904 100644
--- a/arch/mips64/kernel/smp.c
+++ b/arch/mips64/kernel/smp.c
@@ -85,3 +85,9 @@ smp_call_function (void (*func) (void *info), void *info, int retry, int wait)
 	/* XXX - kinda important ;-)  */
 	panic("smp_call_function\n");
 }
+
+void flush_tlb_others (unsigned long cpumask, struct mm_struct *mm, 
+						unsigned long va)
+{
+	panic("flush_tlb_others\n");
+}
diff --git a/arch/mips64/sgi-ip27/ip27-timer.c b/arch/mips64/sgi-ip27/ip27-timer.c
index ff6ea60e7..5b74fffc0 100644
--- a/arch/mips64/sgi-ip27/ip27-timer.c
+++ b/arch/mips64/sgi-ip27/ip27-timer.c
@@ -89,6 +89,8 @@ static int set_rtc_mmss(unsigned long nowtime)
 
 void rt_timer_interrupt(struct pt_regs *regs)
 {
+	int cpu = smp_processor_id();
+	int user = user_mode(regs);
 	int irq = 7;				/* XXX Assign number */
 
 	write_lock(&xtime_lock);
@@ -101,8 +103,35 @@ again:
 	if (LOCAL_HUB_L(PI_RT_COUNT) >= ct_cur)
 		goto again;
 
-	kstat.irqs[0][irq]++;
+	kstat.irqs[cpu][irq]++;		/* kstat+do_timer only for bootcpu? */
 	do_timer(regs);
+
+#ifdef CONFIG_SMP
+	if (current->pid) {
+		unsigned int *inc, *inc2;
+
+		update_one_process(current, 1, user, !user, cpu);
+		if (--current->counter <= 0) {
+			current->counter = 0;
+			current->need_resched = 1;
+		}
+
+		if (user) {
+			if (current->priority < DEF_PRIORITY) {
+				inc = &kstat.cpu_nice;
+				inc2 = &kstat.per_cpu_nice[cpu];
+			} else {
+				inc = &kstat.cpu_user;
+				inc2 = &kstat.per_cpu_user[cpu];
+			}
+		} else {
+			inc = &kstat.cpu_system;
+			inc2 = &kstat.per_cpu_system[cpu];
+		}
+		atomic_inc((atomic_t *)inc);
+		atomic_inc((atomic_t *)inc2);
+	}
+#endif /* CONFIG_SMP */
 	
         /*
          * If we have an externally synchronized Linux clock, then update
-- 
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