linux-kernel - [PATCH 05/15] x86: apic

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Date:	Mon, 18 Aug 2008 20:45:53 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	mingo@...e.hu, macro@...ux-mips.org
Cc:	hpa@...or.com, tglx@...utronix.de, linux-kernel@...r.kernel.org,
	Cyrill Gorcunov <gorcunov@...il.com>
Subject: [PATCH 05/15] x86: apic - unify connect_bsp_APIC

Signed-off-by: Cyrill Gorcunov <gorcunov@...il.com>
---
 arch/x86/kernel/apic_32.c |    2 ++
 arch/x86/kernel/apic_64.c |   20 ++++++++++++++++++--
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/apic_32.c b/arch/x86/kernel/apic_32.c
index d4efe86..6d230e9 100644
--- a/arch/x86/kernel/apic_32.c
+++ b/arch/x86/kernel/apic_32.c
@@ -1387,6 +1387,7 @@ void smp_error_interrupt(struct pt_regs *regs)
  */
 void __init connect_bsp_APIC(void)
 {
+#ifdef CONFIG_X86_32
 	if (pic_mode) {
 		/*
 		 * Do not trust the local APIC being empty at bootup.
@@ -1401,6 +1402,7 @@ void __init connect_bsp_APIC(void)
 		outb(0x70, 0x22);
 		outb(0x01, 0x23);
 	}
+#endif
 	enable_apic_mode();
 }
 
diff --git a/arch/x86/kernel/apic_64.c b/arch/x86/kernel/apic_64.c
index 4880654..5579e21 100644
--- a/arch/x86/kernel/apic_64.c
+++ b/arch/x86/kernel/apic_64.c
@@ -1285,10 +1285,26 @@ asmlinkage void smp_error_interrupt(void)
 }
 
 /**
- *  * connect_bsp_APIC - attach the APIC to the interrupt system
- *   */
+ * connect_bsp_APIC - attach the APIC to the interrupt system
+ */
 void __init connect_bsp_APIC(void)
 {
+#ifdef CONFIG_X86_32
+	if (pic_mode) {
+		/*
+		 * Do not trust the local APIC being empty at bootup.
+		 */
+		clear_local_APIC();
+		/*
+		 * PIC mode, enable APIC mode in the IMCR, i.e.  connect BSP's
+		 * local APIC to INT and NMI lines.
+		 */
+		apic_printk(APIC_VERBOSE, "leaving PIC mode, "
+				"enabling APIC mode.\n");
+		outb(0x70, 0x22);
+		outb(0x01, 0x23);
+	}
+#endif
 	enable_apic_mode();
 }
 
-- 
1.6.0.rc1.34.g0fe8c

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