1 files changed, 125 insertions, 0 deletions

diff --git a/arch/x86/mach-generic/probe.c b/arch/x86/mach-generic/probe.c
new file mode 100644
index 000000000000..74f3da634423
--- /dev/null
+++ b/arch/x86/mach-generic/probe.c
@@ -0,0 +1,125 @@
+/* Copyright 2003 Andi Kleen, SuSE Labs. 
+ * Subject to the GNU Public License, v.2 
+ * 
+ * Generic x86 APIC driver probe layer.
+ */  
+#include <linux/threads.h>
+#include <linux/cpumask.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/ctype.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <asm/fixmap.h>
+#include <asm/mpspec.h>
+#include <asm/apicdef.h>
+#include <asm/genapic.h>
+
+extern struct genapic apic_summit;
+extern struct genapic apic_bigsmp;
+extern struct genapic apic_es7000;
+extern struct genapic apic_default;
+
+struct genapic *genapic = &apic_default;
+
+struct genapic *apic_probe[] __initdata = { 
+        &apic_summit,
+        &apic_bigsmp, 
+        &apic_es7000,
+        &apic_default,  /* must be last */
+        NULL,
+};
+
+static int cmdline_apic __initdata;
+static int __init parse_apic(char *arg)
+{
+        int i;
+
+        if (!arg)
+                return -EINVAL;
+
+        for (i = 0; apic_probe[i]; i++) {
+                if (!strcmp(apic_probe[i]->name, arg)) {
+                        genapic = apic_probe[i];
+                        cmdline_apic = 1;
+                        return 0;
+                }
+        }
+
+        /* Parsed again by __setup for debug/verbose */
+        return 0;
+}
+early_param("apic", parse_apic);
+
+void __init generic_bigsmp_probe(void)
+{
+        /*
+         * This routine is used to switch to bigsmp mode when
+         * - There is no apic= option specified by the user
+         * - generic_apic_probe() has choosen apic_default as the sub_arch
+         * - we find more than 8 CPUs in acpi LAPIC listing with xAPIC support
+         */
+
+        if (!cmdline_apic && genapic == &apic_default)
+                if (apic_bigsmp.probe()) {
+                        genapic = &apic_bigsmp;
+                        printk(KERN_INFO "Overriding APIC driver with %s\n",
+                               genapic->name);
+                }
+}
+
+void __init generic_apic_probe(void)
+{ 
+        if (!cmdline_apic) {
+                int i;
+                for (i = 0; apic_probe[i]; i++) {
+                        if (apic_probe[i]->probe()) {
+                                genapic = apic_probe[i];
+                                break;
+                        }
+                }
+                /* Not visible without early console */
+                if (!apic_probe[i])
+                        panic("Didn't find an APIC driver");
+        }
+        printk(KERN_INFO "Using APIC driver %s\n", genapic->name);
+} 
+
+/* These functions can switch the APIC even after the initial ->probe() */
+
+int __init mps_oem_check(struct mp_config_table *mpc, char *oem, char *productid)
+{ 
+        int i;
+        for (i = 0; apic_probe[i]; ++i) { 
+                if (apic_probe[i]->mps_oem_check(mpc,oem,productid)) { 
+                        if (!cmdline_apic) {
+                                genapic = apic_probe[i];
+                                printk(KERN_INFO "Switched to APIC driver `%s'.\n",
+                                       genapic->name);
+                        }
+                        return 1;
+                } 
+        } 
+        return 0;
+} 
+
+int __init 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)) { 
+                        if (!cmdline_apic) {
+                                genapic = apic_probe[i];
+                                printk(KERN_INFO "Switched to APIC driver `%s'.\n",
+                                       genapic->name);
+                        }
+                        return 1;
+                } 
+        } 
+        return 0;       
+}
+
+int hard_smp_processor_id(void)
+{
+        return genapic->get_apic_id(*(unsigned long *)(APIC_BASE+APIC_ID));
+}