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authorCyrill Gorcunov <gorcunov@gmail.com>2008-08-18 20:45:53 +0400
committerIngo Molnar <mingo@elte.hu>2008-08-19 02:07:14 +0200
commit36c9d6742897fa414f51c4e9d0f20ab4e6bf942c (patch)
tree4e671ed13edabe691f8f48a582141f3c086afd11 /arch/x86/kernel/apic_64.c
parentfe4024dcb0c01e5399394d2807406a2c13fb1eb7 (diff)
x86: apic - unify connect_bsp_APIC
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/apic_64.c')
-rw-r--r--arch/x86/kernel/apic_64.c20
1 files changed, 18 insertions, 2 deletions
diff --git a/arch/x86/kernel/apic_64.c b/arch/x86/kernel/apic_64.c
index 48806546d49f..5579e213b5d2 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();
}