1 files changed, 102 insertions, 0 deletions

diff --git a/arch/i386/mach-generic/probe.c b/arch/i386/mach-generic/probe.c
new file mode 100644
index 000000000000..5497c65a8790
--- /dev/null
+++ b/arch/i386/mach-generic/probe.c
@@ -0,0 +1,102 @@
+/* Copyright 2003 Andi Kleen, SuSE Labs. 
+ * Subject to the GNU Public License, v.2 
+ * 
+ * Generic x86 APIC driver probe layer.
+ */  
+#include <linux/config.h>
+#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 <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,
+};
+
+void __init generic_apic_probe(char *command_line) 
+{ 
+        char *s;
+        int i;
+        int changed = 0;
+
+        s = strstr(command_line, "apic=");
+        if (s && (s == command_line || isspace(s[-1]))) { 
+                char *p = strchr(s, ' '), old; 
+                if (!p)
+                        p = strchr(s, '\0'); 
+                old = *p; 
+                *p = 0; 
+                for (i = 0; !changed && apic_probe[i]; i++) {
+                        if (!strcmp(apic_probe[i]->name, s+5)) { 
+                                changed = 1;
+                                genapic = apic_probe[i];
+                        }
+                }
+                if (!changed)
+                        printk(KERN_ERR "Unknown genapic `%s' specified.\n", s);
+                *p = old;
+        } 
+        for (i = 0; !changed && apic_probe[i]; i++) { 
+                if (apic_probe[i]->probe()) {
+                        changed = 1;
+                        genapic = apic_probe[i]; 
+                } 
+        }
+        /* Not visible without early console */ 
+        if (!changed) 
+                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)) { 
+                        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)) { 
+                        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));
+}