linux-kernel - [PATCH 49/52] wrap esr setting up in i386 in lapic_setup

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Date:	Mon,  3 Mar 2008 14:13:17 -0300
From:	Glauber Costa <gcosta@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	akpm@...ux-foundation.org, glommer@...il.com, mingo@...e.hu,
	tglx@...utronix.de, Glauber Costa <gcosta@...hat.com>
Subject: [PATCH 49/52] wrap esr setting up in i386 in lapic_setup_esr

it is a little bit more complicated than x86_64 due to erratas and
other stuff, but its existance will ease integration

Signed-off-by: Glauber Costa <gcosta@...hat.com>
---
 arch/x86/kernel/apic_32.c |   73 ++++++++++++++++++++++++--------------------
 1 files changed, 40 insertions(+), 33 deletions(-)

diff --git a/arch/x86/kernel/apic_32.c b/arch/x86/kernel/apic_32.c
index 6aa93db..4a754ee 100644
--- a/arch/x86/kernel/apic_32.c
+++ b/arch/x86/kernel/apic_32.c
@@ -897,12 +897,50 @@ void __init init_bsp_APIC(void)
 	apic_write_around(APIC_LVT1, value);
 }
 
+void __cpuinit lapic_setup_esr(void)
+{
+	unsigned long oldvalue, value, maxlvt;
+	if (lapic_is_integrated() && !esr_disable) {
+		/* !82489DX */
+		maxlvt = lapic_get_maxlvt();
+		if (maxlvt > 3)		/* Due to the Pentium erratum 3AP. */
+			apic_write(APIC_ESR, 0);
+		oldvalue = apic_read(APIC_ESR);
+
+		/* enables sending errors */
+		value = ERROR_APIC_VECTOR;
+		apic_write_around(APIC_LVTERR, value);
+		/*
+		 * spec says clear errors after enabling vector.
+		 */
+		if (maxlvt > 3)
+			apic_write(APIC_ESR, 0);
+		value = apic_read(APIC_ESR);
+		if (value != oldvalue)
+			apic_printk(APIC_VERBOSE, "ESR value before enabling "
+				"vector: 0x%08lx  after: 0x%08lx\n",
+				oldvalue, value);
+	} else {
+		if (esr_disable)
+			/*
+			 * Something untraceable is creating bad interrupts on
+			 * secondary quads ... for the moment, just leave the
+			 * ESR disabled - we can't do anything useful with the
+			 * errors anyway - mbligh
+			 */
+			printk(KERN_INFO "Leaving ESR disabled.\n");
+		else
+			printk(KERN_INFO "No ESR for 82489DX.\n");
+	}
+}
+
+
 /**
  * setup_local_APIC - setup the local APIC
  */
 void __cpuinit setup_local_APIC(void)
 {
-	unsigned long oldvalue, value, maxlvt, integrated;
+	unsigned long value, integrated;
 	int i, j;
 
 	/* Pound the ESR really hard over the head with a big hammer - mbligh */
@@ -1027,38 +1065,7 @@ void __cpuinit setup_local_APIC(void)
 		value |= APIC_LVT_LEVEL_TRIGGER;
 	apic_write_around(APIC_LVT1, value);
 
-	if (integrated && !esr_disable) {
-		/* !82489DX */
-		maxlvt = lapic_get_maxlvt();
-		if (maxlvt > 3)		/* Due to the Pentium erratum 3AP. */
-			apic_write(APIC_ESR, 0);
-		oldvalue = apic_read(APIC_ESR);
-
-		/* enables sending errors */
-		value = ERROR_APIC_VECTOR;
-		apic_write_around(APIC_LVTERR, value);
-		/*
-		 * spec says clear errors after enabling vector.
-		 */
-		if (maxlvt > 3)
-			apic_write(APIC_ESR, 0);
-		value = apic_read(APIC_ESR);
-		if (value != oldvalue)
-			apic_printk(APIC_VERBOSE, "ESR value before enabling "
-				"vector: 0x%08lx  after: 0x%08lx\n",
-				oldvalue, value);
-	} else {
-		if (esr_disable)
-			/*
-			 * Something untraceable is creating bad interrupts on
-			 * secondary quads ... for the moment, just leave the
-			 * ESR disabled - we can't do anything useful with the
-			 * errors anyway - mbligh
-			 */
-			printk(KERN_INFO "Leaving ESR disabled.\n");
-		else
-			printk(KERN_INFO "No ESR for 82489DX.\n");
-	}
+	lapic_setup_esr();
 
 	/* Disable the local apic timer */
 	value = apic_read(APIC_LVTT);
-- 
1.5.0.6

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