patch-2.1.102 linux/arch/i386/kernel/smp.c

• Lines: 86
• Date: Thu May 14 09:43:35 1998
• Orig file: v2.1.101/linux/arch/i386/kernel/smp.c
• Orig date: Thu May 7 22:51:46 1998

diff -u --recursive --new-file v2.1.101/linux/arch/i386/kernel/smp.c linux/arch/i386/kernel/smp.c
@@ -636,9 +636,16 @@
  	value = apic_read(APIC_SPIV);
  	value |= (1<<8);		/* Enable APIC (bit==1) */
  	value &= ~(1<<9);		/* Enable focus processor (bit==0) */
+	value |= 0xff;			/* Set spurious IRQ vector to 0xff */
  	apic_write(APIC_SPIV,value);
 
+ 	value = apic_read(APIC_TASKPRI);
+ 	value &= ~APIC_TPRI_MASK;	/* Set Task Priority to 'accept all' */
+ 	apic_write(APIC_TASKPRI,value);
+
 	udelay(100);			/* B safe */
+	ack_APIC_irq();
+	udelay(100);
 }
 
 __initfunc(void smp_callin(void))
@@ -1152,12 +1159,6 @@
 	__restore_flags(flags);
 }
 
-void funny (void)
-{
-	send_IPI(APIC_DEST_ALLBUT,0x30 /*IO_APIC_VECTOR(11)*/);
-	for(;;)__cli();
-}
-
 /*
  * A non wait message cannot pass data or cpu source info. This current setup
  * is only safe because the kernel lock owner is the only person who can send
@@ -1474,19 +1475,18 @@
 }
 
 /*
- *	Reschedule call back
+ * Reschedule call back (not used currently)
  */
+
 asmlinkage void smp_reschedule_interrupt(void)
 {
 	int cpu = smp_processor_id();
 
 	ack_APIC_irq();
-	for (;;) __cli();
 	/*
 	 * This looks silly, but we actually do need to wait
 	 * for the global interrupt lock.
 	 */
-	printk("huh, this is used, where???\n");
 	irq_enter(cpu, 0);
 	need_resched = 1;
 	irq_exit(cpu, 0);
@@ -1522,6 +1522,15 @@
 }
 
 /*
+ * This interrupt should _never_ happen with our APIC/SMP architecture
+ */
+asmlinkage void smp_spurious_interrupt(void)
+{
+	ack_APIC_irq ();
+	printk("spurious APIC interrupt, ayiee, should never happen.\n");
+}
+
+/*
  * This part sets up the APIC 32 bit clock in LVTT1, with HZ interrupts
  * per second. We assume that the caller has already set up the local
  * APIC.
@@ -1564,7 +1573,7 @@
  * APIC double write bug.
  */
 
-#define APIC_DIVISOR 1
+#define APIC_DIVISOR 16
 
 void setup_APIC_timer (unsigned int clocks)
 {
@@ -1588,7 +1597,7 @@
 	 */
 	tmp_value = apic_read(APIC_TDCR);
 	apic_write(APIC_TDCR , (tmp_value & ~APIC_TDR_DIV_1 )
-				 | APIC_TDR_DIV_1);
+				 | APIC_TDR_DIV_16);
 
 	tmp_value = apic_read(APIC_TMICT);
 	apic_write(APIC_TMICT, clocks/APIC_DIVISOR);