1 files changed, 93 insertions, 0 deletions
diff --git a/arch/x86/kernel/apic/probe_64.c b/arch/x86/kernel/apic/probe_64.c
new file mode 100644
index 00000000000..8d7748efe6a
--- /dev/null
+++ b/arch/x86/kernel/apic/probe_64.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright 2004 James Cleverdon, IBM.
+ * Subject to the GNU Public License, v.2
+ *
+ * Generic APIC sub-arch probe layer.
+ *
+ * Hacked for x86-64 by James Cleverdon from i386 architecture code by
+ * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and
+ * James Cleverdon.
+ */
+#include <linux/threads.h>
+#include <linux/cpumask.h>
+#include <linux/string.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/ctype.h>
+#include <linux/init.h>
+#include <linux/hardirq.h>
+#include <linux/dmar.h>
+
+#include <asm/smp.h>
+#include <asm/apic.h>
+#include <asm/ipi.h>
+#include <asm/setup.h>
+
+extern struct apic apic_flat;
+extern struct apic apic_physflat;
+extern struct apic apic_x2xpic_uv_x;
+extern struct apic apic_x2apic_phys;
+extern struct apic apic_x2apic_cluster;
+
+struct apic __read_mostly *apic = &apic_flat;
+EXPORT_SYMBOL_GPL(apic);
+
+static struct apic *apic_probe[] __initdata = {
+#ifdef CONFIG_X86_UV
+	&apic_x2apic_uv_x,
+#endif
+#ifdef CONFIG_X86_X2APIC
+	&apic_x2apic_phys,
+	&apic_x2apic_cluster,
+#endif
+	&apic_physflat,
+	NULL,
+};
+
+/*
+ * Check the APIC IDs in bios_cpu_apicid and choose the APIC mode.
+ */
+void __init default_setup_apic_routing(void)
+{
+#ifdef CONFIG_X86_X2APIC
+	if (x2apic && (apic != &apic_x2apic_phys &&
+#ifdef CONFIG_X86_UV
+		       apic != &apic_x2apic_uv_x &&
+#endif
+		       apic != &apic_x2apic_cluster)) {
+		if (x2apic_phys)
+			apic = &apic_x2apic_phys;
+		else
+			apic = &apic_x2apic_cluster;
+		printk(KERN_INFO "Setting APIC routing to %s\n", apic->name);
+	}
+#endif
+
+	if (apic == &apic_flat) {
+		if (max_physical_apicid >= 8)
+			apic = &apic_physflat;
+		printk(KERN_INFO "Setting APIC routing to %s\n", apic->name);
+	}
+}
+
+/* Same for both flat and physical. */
+
+void apic_send_IPI_self(int vector)
+{
+	__default_send_IPI_shortcut(APIC_DEST_SELF, vector, APIC_DEST_PHYSICAL);
+}
+
+int __init default_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
+{
+	int i;
+
+	for (i = 0; apic_probe[i]; ++i) {
+		if (apic_probe[i]->acpi_madt_oem_check(oem_id, oem_table_id)) {
+			apic = apic_probe[i];
+			printk(KERN_INFO "Setting APIC routing to %s.\n",
+				apic->name);
+			return 1;
+		}
+	}
+	return 0;
+}