[PATCH] i386: safe_apic_wait_icr_idle - i386

[powerpc.git] / arch / i386 / kernel / apic.c

diff --git a/arch/i386/kernel/apic.c b/arch/i386/kernel/apic.c
index 93aa911..aca054c 100644 (file)
--- a/arch/i386/kernel/apic.c
+++ b/arch/i386/kernel/apic.c
@@ -129,6 +129,28 @@ static int modern_apic(void)
        return lapic_get_version() >= 0x14;
 }
 
+void apic_wait_icr_idle(void)
+{
+       while (apic_read(APIC_ICR) & APIC_ICR_BUSY)
+               cpu_relax();
+}
+
+unsigned long safe_apic_wait_icr_idle(void)
+{
+       unsigned long send_status;
+       int timeout;
+
+       timeout = 0;
+       do {
+               send_status = apic_read(APIC_ICR) & APIC_ICR_BUSY;
+               if (!send_status)
+                       break;
+               udelay(100);
+       } while (timeout++ < 1000);
+
+       return send_status;
+}
+
 /**
  * enable_NMI_through_LVT0 - enable NMI through local vector table 0
  */