From 86c06a33bbd0e32af5fe2e3e99d092f5cf3b66cb Mon Sep 17 00:00:00 2001
From: dg <dg@FreeBSD.org>
Date: Sun, 24 Dec 1995 08:10:52 +0000
Subject: Add Pentium Pro CPU detection and special handling. For now, all the
 optimizations we have for 586s also apply to 686s...this will be fine- tuned
 in the future as appropriate.

---
 sys/amd64/amd64/locore.S     | 17 +++++++++-----
 sys/amd64/amd64/locore.s     | 17 +++++++++-----
 sys/amd64/amd64/machdep.c    | 53 +++++++++++++++++++++++++-------------------
 sys/amd64/amd64/support.S    | 16 ++++++-------
 sys/amd64/amd64/support.s    | 16 ++++++-------
 sys/amd64/amd64/tsc.c        |  8 +++----
 sys/amd64/include/clock.h    | 10 ++++-----
 sys/amd64/include/cputypes.h |  4 +++-
 sys/amd64/isa/clock.c        |  8 +++----
 sys/i386/i386/locore.s       | 17 +++++++++-----
 sys/i386/i386/machdep.c      | 53 +++++++++++++++++++++++++-------------------
 sys/i386/i386/microtime.s    |  6 ++---
 sys/i386/i386/support.s      | 16 ++++++-------
 sys/i386/i386/tsc.c          |  8 +++----
 sys/i386/include/clock.h     | 10 ++++-----
 sys/i386/include/cputypes.h  |  4 +++-
 sys/i386/isa/clock.c         |  8 +++----
 sys/isa/atrtc.c              |  8 +++----
 18 files changed, 159 insertions(+), 120 deletions(-)

(limited to 'sys')

diff --git a/sys/amd64/amd64/locore.S b/sys/amd64/amd64/locore.S
index baf1b4c..fc37327 100644
--- a/sys/amd64/amd64/locore.S
+++ b/sys/amd64/amd64/locore.S
@@ -34,7 +34,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)locore.s	7.3 (Berkeley) 5/13/91
- *	$Id: locore.s,v 1.55 1995/09/15 02:13:18 davidg Exp $
+ *	$Id: locore.s,v 1.56 1995/09/16 21:31:55 pst Exp $
  */
 
 /*
@@ -450,10 +450,17 @@ got_common_bi_size:
 
 	/* less than Pentium; must be 486 */
 	movl	$CPU_486,_cpu-KERNBASE
-	jmp	2f
-
-1:	movl	$CPU_586,_cpu-KERNBASE
+	jmp	3f
+1:
+	/* a Pentium? */
+	cmpl	$5,%eax
+	jne	2f
+	movl	$CPU_586,_cpu-KERNBASE
+	jmp	3f
 2:
+	/* Greater than Pentium...call it a Pentium Pro */
+	movl	$CPU_686,_cpu-KERNBASE
+3:
 
 	/*
 	 * Finished with old stack; load new %esp now instead of later so
@@ -760,7 +767,7 @@ reloc_gdt:
 	 * enable write protection and alignment checking on i486 cpus and
 	 * above.
 	 */
-#if defined(I486_CPU) || defined(I586_CPU)
+#if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
 	cmpl    $CPUCLASS_386,_cpu_class
 	je	1f
 	movl	%cr0,%eax			/* get control word */
diff --git a/sys/amd64/amd64/locore.s b/sys/amd64/amd64/locore.s
index baf1b4c..fc37327 100644
--- a/sys/amd64/amd64/locore.s
+++ b/sys/amd64/amd64/locore.s
@@ -34,7 +34,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)locore.s	7.3 (Berkeley) 5/13/91
- *	$Id: locore.s,v 1.55 1995/09/15 02:13:18 davidg Exp $
+ *	$Id: locore.s,v 1.56 1995/09/16 21:31:55 pst Exp $
  */
 
 /*
@@ -450,10 +450,17 @@ got_common_bi_size:
 
 	/* less than Pentium; must be 486 */
 	movl	$CPU_486,_cpu-KERNBASE
-	jmp	2f
-
-1:	movl	$CPU_586,_cpu-KERNBASE
+	jmp	3f
+1:
+	/* a Pentium? */
+	cmpl	$5,%eax
+	jne	2f
+	movl	$CPU_586,_cpu-KERNBASE
+	jmp	3f
 2:
+	/* Greater than Pentium...call it a Pentium Pro */
+	movl	$CPU_686,_cpu-KERNBASE
+3:
 
 	/*
 	 * Finished with old stack; load new %esp now instead of later so
@@ -760,7 +767,7 @@ reloc_gdt:
 	 * enable write protection and alignment checking on i486 cpus and
 	 * above.
 	 */
-#if defined(I486_CPU) || defined(I586_CPU)
+#if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
 	cmpl    $CPUCLASS_386,_cpu_class
 	je	1f
 	movl	%cr0,%eax			/* get control word */
diff --git a/sys/amd64/amd64/machdep.c b/sys/amd64/amd64/machdep.c
index f703c5f..0a1b14d 100644
--- a/sys/amd64/amd64/machdep.c
+++ b/sys/amd64/amd64/machdep.c
@@ -35,7 +35,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)machdep.c	7.4 (Berkeley) 6/3/91
- *	$Id: machdep.c,v 1.161 1995/12/19 14:30:26 davidg Exp $
+ *	$Id: machdep.c,v 1.162 1995/12/22 18:17:34 bde Exp $
  */
 
 #include "npx.h"
@@ -479,6 +479,7 @@ static struct cpu_nameclass i386_cpus[] = {
 	{ "i486DX",		CPUCLASS_486 },		/* CPU_486   */
 	{ "Pentium",		CPUCLASS_586 },		/* CPU_586   */
 	{ "Cy486DLC",		CPUCLASS_486 },		/* CPU_486DLC */
+	{ "Pentium Pro",	CPUCLASS_686 },		/* CPU_686 */
 };
 
 static void
@@ -494,12 +495,12 @@ identifycpu()
 		panic("startup: bad cpu id");
 	}
 
-#if defined(I586_CPU)
-	if(cpu_class == CPUCLASS_586) {
+#if defined(I586_CPU) || defined(I686_CPU)
+	if (cpu_class == CPUCLASS_586 || cpu_class == CPUCLASS_686) {
 		calibrate_cyclecounter();
 	}
 #endif
-#if defined(I486_CPU) || defined(I586_CPU)
+#if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
 	if (!strcmp(cpu_vendor,"GenuineIntel")) {
 		if ((cpu_id & 0xf00) > 3) {
 			cpu_model[0] = '\0';
@@ -512,14 +513,20 @@ identifycpu()
 				strcpy(cpu_model, "Dual ");
 				break;
 			}
-			if ((cpu_id & 0xf00) == 0x400) {
+
+			switch (cpu_id & 0xf00) {
+			case 0x400:
 				strcat(cpu_model, "i486 ");
-#if defined(I586_CPU)
-			} else if ((cpu_id & 0xf00) == 0x500) {
+				break;
+			case 0x500:
 				strcat(cpu_model, "Pentium"); /* nb no space */
-#endif
-			} else {
-				strcat(cpu_model, "unknown ");
+				break;
+			case 0x600:
+				strcat(cpu_model, "Pentium Pro");
+				break;
+			default:
+				strcat(cpu_model, "unknown");
+				break;
 			}
 
 			switch (cpu_id & 0xff0) {
@@ -540,18 +547,7 @@ identifycpu()
 				break;
 			case 0x480:
 				strcat(cpu_model, "DX4"); break;
-#if defined(I586_CPU)
-			case 0x510:
-			case 0x520:
-				/*
-				 * We used to do all sorts of nonsense here
-				 * to print out iCOMP numbers.  Since these
-				 * are meaningless except to Intel
-				 * marketroids, there seems to be little
-				 * sense in doing so.
-				 */
 				break;
-#endif
 			}
 		}
 	}
@@ -579,11 +575,19 @@ identifycpu()
 		printf("586");
 		break;
 #endif
+#if defined(I686_CPU)
+	case CPUCLASS_686:
+		printf("%d.%02d-MHz ",
+		       ((100 * i586_ctr_rate) >> I586_CTR_RATE_SHIFT) / 100,
+		       ((100 * i586_ctr_rate) >> I586_CTR_RATE_SHIFT) % 100);
+		printf("686");
+		break;
+#endif
 	default:
 		printf("unknown");	/* will panic below... */
 	}
 	printf("-class CPU)\n");
-#if defined(I486_CPU) || defined(I586_CPU)
+#if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
 	if(*cpu_vendor)
 		printf("  Origin = \"%s\"",cpu_vendor);
 	if(cpu_id)
@@ -606,7 +610,7 @@ identifycpu()
 	 */
 	switch (cpu_class) {
 	case CPUCLASS_286:	/* a 286 should not make it this far, anyway */
-#if !defined(I386_CPU) && !defined(I486_CPU) && !defined(I586_CPU)
+#if !defined(I386_CPU) && !defined(I486_CPU) && !defined(I586_CPU) && !defined(I686_CPU)
 #error This kernel is not configured for one of the supported CPUs
 #endif
 #if !defined(I386_CPU)
@@ -618,6 +622,9 @@ identifycpu()
 #if !defined(I586_CPU)
 	case CPUCLASS_586:
 #endif
+#if !defined(I686_CPU)
+	case CPUCLASS_586:
+#endif
 		panic("CPU class not configured");
 	default:
 		break;
diff --git a/sys/amd64/amd64/support.S b/sys/amd64/amd64/support.S
index 901369e..3150bbf 100644
--- a/sys/amd64/amd64/support.S
+++ b/sys/amd64/amd64/support.S
@@ -30,7 +30,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	$Id: support.s,v 1.26 1995/12/10 03:11:32 bde Exp $
+ *	$Id: support.s,v 1.27 1995/12/23 16:46:31 davidg Exp $
  */
 
 #include "assym.s"				/* system definitions */
@@ -355,7 +355,7 @@ ENTRY(copyout)					/* copyout(from_kernel, to_user, len) */
 
 #if defined(I386_CPU)
 
-#if defined(I486_CPU) || defined(I586_CPU)
+#if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
 	cmpl	$CPUCLASS_386,_cpu_class
 	jne	3f
 #endif
@@ -546,10 +546,10 @@ ENTRY(suword)
 
 #if defined(I386_CPU)
 
-#if defined(I486_CPU) || defined(I586_CPU)
+#if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
 	cmpl	$CPUCLASS_386,_cpu_class
 	jne	2f				/* we only have to set the right segment selector */
-#endif /* I486_CPU || I586_CPU */
+#endif /* I486_CPU || I586_CPU || I686_CPU */
 
 	/* XXX - page boundary crossing is still not handled */
 	movl	%edx,%eax
@@ -588,10 +588,10 @@ ENTRY(susword)
 
 #if defined(I386_CPU)
 
-#if defined(I486_CPU) || defined(I586_CPU)
+#if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
 	cmpl	$CPUCLASS_386,_cpu_class
 	jne	2f
-#endif /* I486_CPU || I586_CPU */
+#endif /* I486_CPU || I586_CPU || I686_CPU */
 
 	/* XXX - page boundary crossing is still not handled */
 	movl	%edx,%eax
@@ -631,10 +631,10 @@ ENTRY(subyte)
 
 #if defined(I386_CPU)
 
-#if defined(I486_CPU) || defined(I586_CPU)
+#if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
 	cmpl	$CPUCLASS_386,_cpu_class
 	jne	2f
-#endif /* I486_CPU || I586_CPU */
+#endif /* I486_CPU || I586_CPU || I686_CPU */
 
 	movl	%edx,%eax
 	shrl	$IDXSHIFT,%edx
diff --git a/sys/amd64/amd64/support.s b/sys/amd64/amd64/support.s
index 901369e..3150bbf 100644
--- a/sys/amd64/amd64/support.s
+++ b/sys/amd64/amd64/support.s
@@ -30,7 +30,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	$Id: support.s,v 1.26 1995/12/10 03:11:32 bde Exp $
+ *	$Id: support.s,v 1.27 1995/12/23 16:46:31 davidg Exp $
  */
 
 #include "assym.s"				/* system definitions */
@@ -355,7 +355,7 @@ ENTRY(copyout)					/* copyout(from_kernel, to_user, len) */
 
 #if defined(I386_CPU)
 
-#if defined(I486_CPU) || defined(I586_CPU)
+#if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
 	cmpl	$CPUCLASS_386,_cpu_class
 	jne	3f
 #endif
@@ -546,10 +546,10 @@ ENTRY(suword)
 
 #if defined(I386_CPU)
 
-#if defined(I486_CPU) || defined(I586_CPU)
+#if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
 	cmpl	$CPUCLASS_386,_cpu_class
 	jne	2f				/* we only have to set the right segment selector */
-#endif /* I486_CPU || I586_CPU */
+#endif /* I486_CPU || I586_CPU || I686_CPU */
 
 	/* XXX - page boundary crossing is still not handled */
 	movl	%edx,%eax
@@ -588,10 +588,10 @@ ENTRY(susword)
 
 #if defined(I386_CPU)
 
-#if defined(I486_CPU) || defined(I586_CPU)
+#if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
 	cmpl	$CPUCLASS_386,_cpu_class
 	jne	2f
-#endif /* I486_CPU || I586_CPU */
+#endif /* I486_CPU || I586_CPU || I686_CPU */
 
 	/* XXX - page boundary crossing is still not handled */
 	movl	%edx,%eax
@@ -631,10 +631,10 @@ ENTRY(subyte)
 
 #if defined(I386_CPU)
 
-#if defined(I486_CPU) || defined(I586_CPU)
+#if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
 	cmpl	$CPUCLASS_386,_cpu_class
 	jne	2f
-#endif /* I486_CPU || I586_CPU */
+#endif /* I486_CPU || I586_CPU || I686_CPU */
 
 	movl	%edx,%eax
 	shrl	$IDXSHIFT,%edx
diff --git a/sys/amd64/amd64/tsc.c b/sys/amd64/amd64/tsc.c
index 65668d1..b7c6a2a 100644
--- a/sys/amd64/amd64/tsc.c
+++ b/sys/amd64/amd64/tsc.c
@@ -34,7 +34,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)clock.c	7.2 (Berkeley) 5/12/91
- *	$Id: clock.c,v 1.41 1995/12/14 23:01:51 bde Exp $
+ *	$Id: clock.c,v 1.42 1995/12/20 20:57:33 wollman Exp $
  */
 
 /*
@@ -93,7 +93,7 @@
 int	adjkerntz = 0;		/* offset from CMOS clock */
 int	disable_rtc_set	= 0;	/* disable resettodr() if != 0 */
 u_int	idelayed;
-#ifdef I586_CPU
+#if defined(I586_CPU) || defined(I686_CPU)
 unsigned	i586_ctr_rate;
 long long	i586_ctr_bias;
 long long	i586_last_tick;
@@ -280,7 +280,7 @@ getit(void)
 	return ((high << 8) | low);
 }
 
-#ifdef I586_CPU
+#if defined(I586_CPU) || defined(I686_CPU)
 /*
  * Figure out how fast the cyclecounter runs.  This must be run with
  * clock interrupts disabled, but with the timer/counter programmed
@@ -569,7 +569,7 @@ cpu_initclocks()
 		      /* XXX */ (inthand2_t *)clkintr, &clk_imask,
 		      /* unit */ 0);
 	INTREN(IRQ0);
-#ifdef I586_CPU
+#if defined(I586_CPU) || defined(I686_CPU)
 	/*
 	 * Finish setting up anti-jitter measures.
 	 */
diff --git a/sys/amd64/include/clock.h b/sys/amd64/include/clock.h
index 542e628..1f63bfe 100644
--- a/sys/amd64/include/clock.h
+++ b/sys/amd64/include/clock.h
@@ -3,13 +3,13 @@
  * Garrett Wollman, September 1994.
  * This file is in the public domain.
  *
- *	$Id: clock.h,v 1.6 1995/11/29 19:57:16 wollman Exp $
+ *	$Id: clock.h,v 1.7 1995/12/10 13:38:07 phk Exp $
  */
 
 #ifndef _MACHINE_CLOCK_H_
 #define	_MACHINE_CLOCK_H_
 
-#ifdef I586_CPU
+#if defined(I586_CPU) || defined(I686_CPU)
 
 #define I586_CYCLECTR(x) \
 	__asm __volatile(".byte 0x0f, 0x31" : "=A" (x))
@@ -54,7 +54,7 @@
  */
 extern int	adjkerntz;
 extern int	disable_rtc_set;
-#ifdef I586_CPU
+#if defined(I586_CPU) || defined(I686_CPU)
 extern unsigned	i586_ctr_rate;	/* fixed point */
 extern long long i586_last_tick;
 extern long long i586_ctr_bias;
@@ -63,11 +63,11 @@ extern int 	timer0_max_count;
 extern u_int 	timer0_overflow_threshold;
 extern u_int 	timer0_prescaler_count;
 
-#ifdef I586_CPU
+#if defined(I586_CPU) || defined(I686_CPU)
 void	calibrate_cyclecounter __P((void));
 #endif
 
-#ifdef I586_CPU
+#if defined(I586_CPU) || defined(I686_CPU)
 static __inline u_long 
 cpu_thisticklen(u_long dflt)
 {
diff --git a/sys/amd64/include/cputypes.h b/sys/amd64/include/cputypes.h
index 52d8e20..0c5667b 100644
--- a/sys/amd64/include/cputypes.h
+++ b/sys/amd64/include/cputypes.h
@@ -24,7 +24,7 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
- *	$Id: cputypes.h,v 1.2 1993/11/07 17:42:49 wollman Exp $
+ *	$Id: cputypes.h,v 1.3 1994/09/04 19:59:23 pst Exp $
  */
 
 #ifndef _MACHINE_CPUTYPES_H_
@@ -38,6 +38,7 @@
 #define	CPUCLASS_386	1
 #define	CPUCLASS_486	2
 #define	CPUCLASS_586	3
+#define CPUCLASS_686	4
 
 /*
  *	Kinds of Processor
@@ -50,5 +51,6 @@
 #define	CPU_486		4	/* Intel 80486DX */
 #define	CPU_586		5	/* Intel P.....m (I hate lawyers; it's TM) */
 #define	CPU_486DLC	6	/* Cyrix 486DLC */
+#define CPU_686		7	/* Pentium Pro */
 
 #endif /* _MACHINE_CPUTYPES_H_ */
diff --git a/sys/amd64/isa/clock.c b/sys/amd64/isa/clock.c
index 65668d1..b7c6a2a 100644
--- a/sys/amd64/isa/clock.c
+++ b/sys/amd64/isa/clock.c
@@ -34,7 +34,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)clock.c	7.2 (Berkeley) 5/12/91
- *	$Id: clock.c,v 1.41 1995/12/14 23:01:51 bde Exp $
+ *	$Id: clock.c,v 1.42 1995/12/20 20:57:33 wollman Exp $
  */
 
 /*
@@ -93,7 +93,7 @@
 int	adjkerntz = 0;		/* offset from CMOS clock */
 int	disable_rtc_set	= 0;	/* disable resettodr() if != 0 */
 u_int	idelayed;
-#ifdef I586_CPU
+#if defined(I586_CPU) || defined(I686_CPU)
 unsigned	i586_ctr_rate;
 long long	i586_ctr_bias;
 long long	i586_last_tick;
@@ -280,7 +280,7 @@ getit(void)
 	return ((high << 8) | low);
 }
 
-#ifdef I586_CPU
+#if defined(I586_CPU) || defined(I686_CPU)
 /*
  * Figure out how fast the cyclecounter runs.  This must be run with
  * clock interrupts disabled, but with the timer/counter programmed
@@ -569,7 +569,7 @@ cpu_initclocks()
 		      /* XXX */ (inthand2_t *)clkintr, &clk_imask,
 		      /* unit */ 0);
 	INTREN(IRQ0);
-#ifdef I586_CPU
+#if defined(I586_CPU) || defined(I686_CPU)
 	/*
 	 * Finish setting up anti-jitter measures.
 	 */
diff --git a/sys/i386/i386/locore.s b/sys/i386/i386/locore.s
index baf1b4c..fc37327 100644
--- a/sys/i386/i386/locore.s
+++ b/sys/i386/i386/locore.s
@@ -34,7 +34,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)locore.s	7.3 (Berkeley) 5/13/91
- *	$Id: locore.s,v 1.55 1995/09/15 02:13:18 davidg Exp $
+ *	$Id: locore.s,v 1.56 1995/09/16 21:31:55 pst Exp $
  */
 
 /*
@@ -450,10 +450,17 @@ got_common_bi_size:
 
 	/* less than Pentium; must be 486 */
 	movl	$CPU_486,_cpu-KERNBASE
-	jmp	2f
-
-1:	movl	$CPU_586,_cpu-KERNBASE
+	jmp	3f
+1:
+	/* a Pentium? */
+	cmpl	$5,%eax
+	jne	2f
+	movl	$CPU_586,_cpu-KERNBASE
+	jmp	3f
 2:
+	/* Greater than Pentium...call it a Pentium Pro */
+	movl	$CPU_686,_cpu-KERNBASE
+3:
 
 	/*
 	 * Finished with old stack; load new %esp now instead of later so
@@ -760,7 +767,7 @@ reloc_gdt:
 	 * enable write protection and alignment checking on i486 cpus and
 	 * above.
 	 */
-#if defined(I486_CPU) || defined(I586_CPU)
+#if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
 	cmpl    $CPUCLASS_386,_cpu_class
 	je	1f
 	movl	%cr0,%eax			/* get control word */
diff --git a/sys/i386/i386/machdep.c b/sys/i386/i386/machdep.c
index f703c5f..0a1b14d 100644
--- a/sys/i386/i386/machdep.c
+++ b/sys/i386/i386/machdep.c
@@ -35,7 +35,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)machdep.c	7.4 (Berkeley) 6/3/91
- *	$Id: machdep.c,v 1.161 1995/12/19 14:30:26 davidg Exp $
+ *	$Id: machdep.c,v 1.162 1995/12/22 18:17:34 bde Exp $
  */
 
 #include "npx.h"
@@ -479,6 +479,7 @@ static struct cpu_nameclass i386_cpus[] = {
 	{ "i486DX",		CPUCLASS_486 },		/* CPU_486   */
 	{ "Pentium",		CPUCLASS_586 },		/* CPU_586   */
 	{ "Cy486DLC",		CPUCLASS_486 },		/* CPU_486DLC */
+	{ "Pentium Pro",	CPUCLASS_686 },		/* CPU_686 */
 };
 
 static void
@@ -494,12 +495,12 @@ identifycpu()
 		panic("startup: bad cpu id");
 	}
 
-#if defined(I586_CPU)
-	if(cpu_class == CPUCLASS_586) {
+#if defined(I586_CPU) || defined(I686_CPU)
+	if (cpu_class == CPUCLASS_586 || cpu_class == CPUCLASS_686) {
 		calibrate_cyclecounter();
 	}
 #endif
-#if defined(I486_CPU) || defined(I586_CPU)
+#if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
 	if (!strcmp(cpu_vendor,"GenuineIntel")) {
 		if ((cpu_id & 0xf00) > 3) {
 			cpu_model[0] = '\0';
@@ -512,14 +513,20 @@ identifycpu()
 				strcpy(cpu_model, "Dual ");
 				break;
 			}
-			if ((cpu_id & 0xf00) == 0x400) {
+
+			switch (cpu_id & 0xf00) {
+			case 0x400:
 				strcat(cpu_model, "i486 ");
-#if defined(I586_CPU)
-			} else if ((cpu_id & 0xf00) == 0x500) {
+				break;
+			case 0x500:
 				strcat(cpu_model, "Pentium"); /* nb no space */
-#endif
-			} else {
-				strcat(cpu_model, "unknown ");
+				break;
+			case 0x600:
+				strcat(cpu_model, "Pentium Pro");
+				break;
+			default:
+				strcat(cpu_model, "unknown");
+				break;
 			}
 
 			switch (cpu_id & 0xff0) {
@@ -540,18 +547,7 @@ identifycpu()
 				break;
 			case 0x480:
 				strcat(cpu_model, "DX4"); break;
-#if defined(I586_CPU)
-			case 0x510:
-			case 0x520:
-				/*
-				 * We used to do all sorts of nonsense here
-				 * to print out iCOMP numbers.  Since these
-				 * are meaningless except to Intel
-				 * marketroids, there seems to be little
-				 * sense in doing so.
-				 */
 				break;
-#endif
 			}
 		}
 	}
@@ -579,11 +575,19 @@ identifycpu()
 		printf("586");
 		break;
 #endif
+#if defined(I686_CPU)
+	case CPUCLASS_686:
+		printf("%d.%02d-MHz ",
+		       ((100 * i586_ctr_rate) >> I586_CTR_RATE_SHIFT) / 100,
+		       ((100 * i586_ctr_rate) >> I586_CTR_RATE_SHIFT) % 100);
+		printf("686");
+		break;
+#endif
 	default:
 		printf("unknown");	/* will panic below... */
 	}
 	printf("-class CPU)\n");
-#if defined(I486_CPU) || defined(I586_CPU)
+#if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
 	if(*cpu_vendor)
 		printf("  Origin = \"%s\"",cpu_vendor);
 	if(cpu_id)
@@ -606,7 +610,7 @@ identifycpu()
 	 */
 	switch (cpu_class) {
 	case CPUCLASS_286:	/* a 286 should not make it this far, anyway */
-#if !defined(I386_CPU) && !defined(I486_CPU) && !defined(I586_CPU)
+#if !defined(I386_CPU) && !defined(I486_CPU) && !defined(I586_CPU) && !defined(I686_CPU)
 #error This kernel is not configured for one of the supported CPUs
 #endif
 #if !defined(I386_CPU)
@@ -618,6 +622,9 @@ identifycpu()
 #if !defined(I586_CPU)
 	case CPUCLASS_586:
 #endif
+#if !defined(I686_CPU)
+	case CPUCLASS_586:
+#endif
 		panic("CPU class not configured");
 	default:
 		break;
diff --git a/sys/i386/i386/microtime.s b/sys/i386/i386/microtime.s
index 44b7e97..ab644ad 100644
--- a/sys/i386/i386/microtime.s
+++ b/sys/i386/i386/microtime.s
@@ -32,7 +32,7 @@
  * SUCH DAMAGE.
  *
  *	from: Steve McCanne's microtime code
- *	$Id: microtime.s,v 1.10 1995/10/14 04:53:49 bde Exp $
+ *	$Id: microtime.s,v 1.11 1995/11/29 19:57:03 wollman Exp $
  */
 
 #include <machine/asmacros.h>
@@ -44,7 +44,7 @@
 
 ENTRY(microtime)
 
-#ifdef I586_CPU
+#if defined(I586_CPU) || defined(I686_CPU)
 	movl	_i586_ctr_rate, %ecx
 	testl	%ecx, %ecx
 	jne	pentium_microtime
@@ -175,7 +175,7 @@ common_microtime:
 
 	ret
 
-#ifdef I586_CPU
+#if defined(I586_CPU) || defined(I686_CPU)
 	ALIGN_TEXT
 pentium_microtime:
 	cli
diff --git a/sys/i386/i386/support.s b/sys/i386/i386/support.s
index 901369e..3150bbf 100644
--- a/sys/i386/i386/support.s
+++ b/sys/i386/i386/support.s
@@ -30,7 +30,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	$Id: support.s,v 1.26 1995/12/10 03:11:32 bde Exp $
+ *	$Id: support.s,v 1.27 1995/12/23 16:46:31 davidg Exp $
  */
 
 #include "assym.s"				/* system definitions */
@@ -355,7 +355,7 @@ ENTRY(copyout)					/* copyout(from_kernel, to_user, len) */
 
 #if defined(I386_CPU)
 
-#if defined(I486_CPU) || defined(I586_CPU)
+#if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
 	cmpl	$CPUCLASS_386,_cpu_class
 	jne	3f
 #endif
@@ -546,10 +546,10 @@ ENTRY(suword)
 
 #if defined(I386_CPU)
 
-#if defined(I486_CPU) || defined(I586_CPU)
+#if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
 	cmpl	$CPUCLASS_386,_cpu_class
 	jne	2f				/* we only have to set the right segment selector */
-#endif /* I486_CPU || I586_CPU */
+#endif /* I486_CPU || I586_CPU || I686_CPU */
 
 	/* XXX - page boundary crossing is still not handled */
 	movl	%edx,%eax
@@ -588,10 +588,10 @@ ENTRY(susword)
 
 #if defined(I386_CPU)
 
-#if defined(I486_CPU) || defined(I586_CPU)
+#if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
 	cmpl	$CPUCLASS_386,_cpu_class
 	jne	2f
-#endif /* I486_CPU || I586_CPU */
+#endif /* I486_CPU || I586_CPU || I686_CPU */
 
 	/* XXX - page boundary crossing is still not handled */
 	movl	%edx,%eax
@@ -631,10 +631,10 @@ ENTRY(subyte)
 
 #if defined(I386_CPU)
 
-#if defined(I486_CPU) || defined(I586_CPU)
+#if defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)
 	cmpl	$CPUCLASS_386,_cpu_class
 	jne	2f
-#endif /* I486_CPU || I586_CPU */
+#endif /* I486_CPU || I586_CPU || I686_CPU */
 
 	movl	%edx,%eax
 	shrl	$IDXSHIFT,%edx
diff --git a/sys/i386/i386/tsc.c b/sys/i386/i386/tsc.c
index 65668d1..b7c6a2a 100644
--- a/sys/i386/i386/tsc.c
+++ b/sys/i386/i386/tsc.c
@@ -34,7 +34,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)clock.c	7.2 (Berkeley) 5/12/91
- *	$Id: clock.c,v 1.41 1995/12/14 23:01:51 bde Exp $
+ *	$Id: clock.c,v 1.42 1995/12/20 20:57:33 wollman Exp $
  */
 
 /*
@@ -93,7 +93,7 @@
 int	adjkerntz = 0;		/* offset from CMOS clock */
 int	disable_rtc_set	= 0;	/* disable resettodr() if != 0 */
 u_int	idelayed;
-#ifdef I586_CPU
+#if defined(I586_CPU) || defined(I686_CPU)
 unsigned	i586_ctr_rate;
 long long	i586_ctr_bias;
 long long	i586_last_tick;
@@ -280,7 +280,7 @@ getit(void)
 	return ((high << 8) | low);
 }
 
-#ifdef I586_CPU
+#if defined(I586_CPU) || defined(I686_CPU)
 /*
  * Figure out how fast the cyclecounter runs.  This must be run with
  * clock interrupts disabled, but with the timer/counter programmed
@@ -569,7 +569,7 @@ cpu_initclocks()
 		      /* XXX */ (inthand2_t *)clkintr, &clk_imask,
 		      /* unit */ 0);
 	INTREN(IRQ0);
-#ifdef I586_CPU
+#if defined(I586_CPU) || defined(I686_CPU)
 	/*
 	 * Finish setting up anti-jitter measures.
 	 */
diff --git a/sys/i386/include/clock.h b/sys/i386/include/clock.h
index 542e628..1f63bfe 100644
--- a/sys/i386/include/clock.h
+++ b/sys/i386/include/clock.h
@@ -3,13 +3,13 @@
  * Garrett Wollman, September 1994.
  * This file is in the public domain.
  *
- *	$Id: clock.h,v 1.6 1995/11/29 19:57:16 wollman Exp $
+ *	$Id: clock.h,v 1.7 1995/12/10 13:38:07 phk Exp $
  */
 
 #ifndef _MACHINE_CLOCK_H_
 #define	_MACHINE_CLOCK_H_
 
-#ifdef I586_CPU
+#if defined(I586_CPU) || defined(I686_CPU)
 
 #define I586_CYCLECTR(x) \
 	__asm __volatile(".byte 0x0f, 0x31" : "=A" (x))
@@ -54,7 +54,7 @@
  */
 extern int	adjkerntz;
 extern int	disable_rtc_set;
-#ifdef I586_CPU
+#if defined(I586_CPU) || defined(I686_CPU)
 extern unsigned	i586_ctr_rate;	/* fixed point */
 extern long long i586_last_tick;
 extern long long i586_ctr_bias;
@@ -63,11 +63,11 @@ extern int 	timer0_max_count;
 extern u_int 	timer0_overflow_threshold;
 extern u_int 	timer0_prescaler_count;
 
-#ifdef I586_CPU
+#if defined(I586_CPU) || defined(I686_CPU)
 void	calibrate_cyclecounter __P((void));
 #endif
 
-#ifdef I586_CPU
+#if defined(I586_CPU) || defined(I686_CPU)
 static __inline u_long 
 cpu_thisticklen(u_long dflt)
 {
diff --git a/sys/i386/include/cputypes.h b/sys/i386/include/cputypes.h
index 52d8e20..0c5667b 100644
--- a/sys/i386/include/cputypes.h
+++ b/sys/i386/include/cputypes.h
@@ -24,7 +24,7 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
- *	$Id: cputypes.h,v 1.2 1993/11/07 17:42:49 wollman Exp $
+ *	$Id: cputypes.h,v 1.3 1994/09/04 19:59:23 pst Exp $
  */
 
 #ifndef _MACHINE_CPUTYPES_H_
@@ -38,6 +38,7 @@
 #define	CPUCLASS_386	1
 #define	CPUCLASS_486	2
 #define	CPUCLASS_586	3
+#define CPUCLASS_686	4
 
 /*
  *	Kinds of Processor
@@ -50,5 +51,6 @@
 #define	CPU_486		4	/* Intel 80486DX */
 #define	CPU_586		5	/* Intel P.....m (I hate lawyers; it's TM) */
 #define	CPU_486DLC	6	/* Cyrix 486DLC */
+#define CPU_686		7	/* Pentium Pro */
 
 #endif /* _MACHINE_CPUTYPES_H_ */
diff --git a/sys/i386/isa/clock.c b/sys/i386/isa/clock.c
index 65668d1..b7c6a2a 100644
--- a/sys/i386/isa/clock.c
+++ b/sys/i386/isa/clock.c
@@ -34,7 +34,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)clock.c	7.2 (Berkeley) 5/12/91
- *	$Id: clock.c,v 1.41 1995/12/14 23:01:51 bde Exp $
+ *	$Id: clock.c,v 1.42 1995/12/20 20:57:33 wollman Exp $
  */
 
 /*
@@ -93,7 +93,7 @@
 int	adjkerntz = 0;		/* offset from CMOS clock */
 int	disable_rtc_set	= 0;	/* disable resettodr() if != 0 */
 u_int	idelayed;
-#ifdef I586_CPU
+#if defined(I586_CPU) || defined(I686_CPU)
 unsigned	i586_ctr_rate;
 long long	i586_ctr_bias;
 long long	i586_last_tick;
@@ -280,7 +280,7 @@ getit(void)
 	return ((high << 8) | low);
 }
 
-#ifdef I586_CPU
+#if defined(I586_CPU) || defined(I686_CPU)
 /*
  * Figure out how fast the cyclecounter runs.  This must be run with
  * clock interrupts disabled, but with the timer/counter programmed
@@ -569,7 +569,7 @@ cpu_initclocks()
 		      /* XXX */ (inthand2_t *)clkintr, &clk_imask,
 		      /* unit */ 0);
 	INTREN(IRQ0);
-#ifdef I586_CPU
+#if defined(I586_CPU) || defined(I686_CPU)
 	/*
 	 * Finish setting up anti-jitter measures.
 	 */
diff --git a/sys/isa/atrtc.c b/sys/isa/atrtc.c
index 65668d1..b7c6a2a 100644
--- a/sys/isa/atrtc.c
+++ b/sys/isa/atrtc.c
@@ -34,7 +34,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)clock.c	7.2 (Berkeley) 5/12/91
- *	$Id: clock.c,v 1.41 1995/12/14 23:01:51 bde Exp $
+ *	$Id: clock.c,v 1.42 1995/12/20 20:57:33 wollman Exp $
  */
 
 /*
@@ -93,7 +93,7 @@
 int	adjkerntz = 0;		/* offset from CMOS clock */
 int	disable_rtc_set	= 0;	/* disable resettodr() if != 0 */
 u_int	idelayed;
-#ifdef I586_CPU
+#if defined(I586_CPU) || defined(I686_CPU)
 unsigned	i586_ctr_rate;
 long long	i586_ctr_bias;
 long long	i586_last_tick;
@@ -280,7 +280,7 @@ getit(void)
 	return ((high << 8) | low);
 }
 
-#ifdef I586_CPU
+#if defined(I586_CPU) || defined(I686_CPU)
 /*
  * Figure out how fast the cyclecounter runs.  This must be run with
  * clock interrupts disabled, but with the timer/counter programmed
@@ -569,7 +569,7 @@ cpu_initclocks()
 		      /* XXX */ (inthand2_t *)clkintr, &clk_imask,
 		      /* unit */ 0);
 	INTREN(IRQ0);
-#ifdef I586_CPU
+#if defined(I586_CPU) || defined(I686_CPU)
 	/*
 	 * Finish setting up anti-jitter measures.
 	 */
-- 
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