From: Andi Kleen <ak@suse.de>
Date: Mon, 12 Sep 2005 16:49:24 +0000 (+0200)
Subject: [PATCH] x86-64: Remove code for outdated APICs
X-Git-Tag: 2.1b_release~39730
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5a40b7c2abdedcf53c9a6ee790991acfcef5b6c7;p=platform%2Fkernel%2Fkernel-mfld-blackbay.git

[PATCH] x86-64: Remove code for outdated APICs

No x86-64 chipset has these APICs.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/arch/x86_64/kernel/apic.c b/arch/x86_64/kernel/apic.c
index 9af0cc3..fc84bea 100644
--- a/arch/x86_64/kernel/apic.c
+++ b/arch/x86_64/kernel/apic.c
@@ -109,11 +109,8 @@ void clear_local_APIC(void)
 	if (maxlvt >= 4)
 		apic_write_around(APIC_LVTPC, APIC_LVT_MASKED);
 	v = GET_APIC_VERSION(apic_read(APIC_LVR));
-	if (APIC_INTEGRATED(v)) {	/* !82489DX */
-		if (maxlvt > 3)		/* Due to Pentium errata 3AP and 11AP. */
-			apic_write(APIC_ESR, 0);
-		apic_read(APIC_ESR);
-	}
+	apic_write(APIC_ESR, 0);
+	apic_read(APIC_ESR);
 }
 
 void __init connect_bsp_APIC(void)
@@ -316,8 +313,6 @@ void __init init_bsp_APIC(void)
 	 */
 	apic_write_around(APIC_LVT0, APIC_DM_EXTINT);
 	value = APIC_DM_NMI;
-	if (!APIC_INTEGRATED(ver))		/* 82489DX */
-		value |= APIC_LVT_LEVEL_TRIGGER;
 	apic_write_around(APIC_LVT1, value);
 }
 
@@ -422,15 +417,11 @@ void __cpuinit setup_local_APIC (void)
 		value = APIC_DM_NMI;
 	else
 		value = APIC_DM_NMI | APIC_LVT_MASKED;
-	if (!APIC_INTEGRATED(ver))		/* 82489DX */
-		value |= APIC_LVT_LEVEL_TRIGGER;
 	apic_write_around(APIC_LVT1, value);
 
 	{
 		unsigned oldvalue;
 		maxlvt = get_maxlvt();
-		if (maxlvt > 3)		/* Due to the Pentium erratum 3AP. */
-			apic_write(APIC_ESR, 0);
 		oldvalue = apic_read(APIC_ESR);
 		value = ERROR_APIC_VECTOR;      // enables sending errors
 		apic_write_around(APIC_LVTERR, value);
@@ -674,8 +665,6 @@ static void __setup_APIC_LVTT(unsigned int clocks)
 
 	ver = GET_APIC_VERSION(apic_read(APIC_LVR));
 	lvtt_value = APIC_LVT_TIMER_PERIODIC | LOCAL_TIMER_VECTOR;
-	if (!APIC_INTEGRATED(ver))
-		lvtt_value |= SET_APIC_TIMER_BASE(APIC_TIMER_BASE_DIV);
 	apic_write_around(APIC_LVTT, lvtt_value);
 
 	/*
diff --git a/arch/x86_64/kernel/io_apic.c b/arch/x86_64/kernel/io_apic.c
index 5f1529b..0645dc8 100644
--- a/arch/x86_64/kernel/io_apic.c
+++ b/arch/x86_64/kernel/io_apic.c
@@ -1022,13 +1022,11 @@ void __apicdebuginit print_local_APIC(void * dummy)
 	v = apic_read(APIC_TASKPRI);
 	printk(KERN_DEBUG "... APIC TASKPRI: %08x (%02x)\n", v, v & APIC_TPRI_MASK);
 
-	if (APIC_INTEGRATED(ver)) {			/* !82489DX */
-		v = apic_read(APIC_ARBPRI);
-		printk(KERN_DEBUG "... APIC ARBPRI: %08x (%02x)\n", v,
-			v & APIC_ARBPRI_MASK);
-		v = apic_read(APIC_PROCPRI);
-		printk(KERN_DEBUG "... APIC PROCPRI: %08x\n", v);
-	}
+	v = apic_read(APIC_ARBPRI);
+	printk(KERN_DEBUG "... APIC ARBPRI: %08x (%02x)\n", v,
+		v & APIC_ARBPRI_MASK);
+	v = apic_read(APIC_PROCPRI);
+	printk(KERN_DEBUG "... APIC PROCPRI: %08x\n", v);
 
 	v = apic_read(APIC_EOI);
 	printk(KERN_DEBUG "... APIC EOI: %08x\n", v);
@@ -1048,12 +1046,8 @@ void __apicdebuginit print_local_APIC(void * dummy)
 	printk(KERN_DEBUG "... APIC IRR field:\n");
 	print_APIC_bitfield(APIC_IRR);
 
-	if (APIC_INTEGRATED(ver)) {		/* !82489DX */
-		if (maxlvt > 3)		/* Due to the Pentium erratum 3AP. */
-			apic_write(APIC_ESR, 0);
-		v = apic_read(APIC_ESR);
-		printk(KERN_DEBUG "... APIC ESR: %08x\n", v);
-	}
+	v = apic_read(APIC_ESR);
+	printk(KERN_DEBUG "... APIC ESR: %08x\n", v);
 
 	v = apic_read(APIC_ICR);
 	printk(KERN_DEBUG "... APIC ICR: %08x\n", v);
diff --git a/arch/x86_64/kernel/smpboot.c b/arch/x86_64/kernel/smpboot.c
index d4b6328..4efe36f 100644
--- a/arch/x86_64/kernel/smpboot.c
+++ b/arch/x86_64/kernel/smpboot.c
@@ -610,16 +610,7 @@ static int __cpuinit wakeup_secondary_via_INIT(int phys_apicid, unsigned int sta
 
 	atomic_set(&init_deasserted, 1);
 
-	/*
-	 * Should we send STARTUP IPIs ?
-	 *
-	 * Determine this based on the APIC version.
-	 * If we don't have an integrated APIC, don't send the STARTUP IPIs.
-	 */
-	if (APIC_INTEGRATED(apic_version[phys_apicid]))
-		num_starts = 2;
-	else
-		num_starts = 0;
+	num_starts = 2;
 
 	/*
 	 * Run STARTUP IPI loop.