x86: apic - unify disconnect_bsp_APIC

- just #ifdef added

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 21 insertions, 2 deletions

diff --git a/arch/x86/kernel/apic_64.c b/arch/x86/kernel/apic_64.c
index fe57db9f3fbb..0d969103fce7 100644
--- a/arch/x86/kernel/apic_64.c
+++ b/arch/x86/kernel/apic_64.c
@@ -1348,8 +1348,24 @@ void __init connect_bsp_APIC(void)
  */
 void disconnect_bsp_APIC(int virt_wire_setup)
 {
+#ifdef CONFIG_X86_32
+        if (pic_mode) {
+                /*
+                 * Put the board back into PIC mode (has an effect only on
+                 * certain older boards).  Note that APIC interrupts, including
+                 * IPIs, won't work beyond this point!  The only exception are
+                 * INIT IPIs.
+                 */
+                apic_printk(APIC_VERBOSE, "disabling APIC mode, "
+                                "entering PIC mode.\n");
+                outb(0x70, 0x22);
+                outb(0x00, 0x23);
+                return;
+        }
+#endif
+
         /* Go back to Virtual Wire compatibility mode */
-        unsigned long value;
+        unsigned int value;
 
         /* For the spurious interrupt use vector F, and enable it */
         value = apic_read(APIC_SPIV);
@@ -1375,7 +1391,10 @@ void disconnect_bsp_APIC(int virt_wire_setup)
                 apic_write(APIC_LVT0, APIC_LVT_MASKED);
         }
 
-        /* For LVT1 make it edge triggered, active high, nmi and enabled */
+        /*
+         * For LVT1 make it edge triggered, active high,
+         * nmi and enabled
+         */
         value = apic_read(APIC_LVT1);
         value &= ~(APIC_MODE_MASK | APIC_SEND_PENDING |
                         APIC_INPUT_POLARITY | APIC_LVT_REMOTE_IRR |