[PATCH] Summit: MPS table detection

Adds detection for summit machines from the MPS tables.
Prints a handy-dandy debug message telling you what kind of twisted
machine the kernel thinks you have.

arch/i386/kernel/mpparse.c

@@ -30,6 +30,7 @@
 #include <asm/mpspec.h>
 #include <asm/pgalloc.h>
 #include <asm/io_apic.h>
+#include "mach_apic.h"
 
 /* Have we found an MP table */
 int smp_found_config;
@@ -69,6 +70,8 @@ static unsigned int __initdata num_processors;
 /* Bitmask of physically existing CPUs */
 unsigned long phys_cpu_present_map;
 
+int summit_x86 = 0;
+
 /*
  * Intel MP BIOS table parsing routines:
  */
@@ -356,6 +359,7 @@ static void __init smp_read_mpc_oem(struct mp_config_oemtable *oemtable, \
 static int __init smp_read_mpc(struct mp_config_table *mpc)
 {
 	char str[16];
+	char oem[10];
 	int count=sizeof(*mpc);
 	unsigned char *mpt=((unsigned char *)mpc)+count;
 
@@ -380,14 +384,16 @@ static int __init smp_read_mpc(struct mp_config_table *mpc)
 		printk(KERN_ERR "SMP mptable: null local APIC address!\n");
 		return 0;
 	}
-	memcpy(str,mpc->mpc_oem,8);
-	str[8]=0;
-	printk("OEM ID: %s ",str);
+	memcpy(oem,mpc->mpc_oem,8);
+	oem[8]=0;
+	printk("OEM ID: %s ",oem);
 
 	memcpy(str,mpc->mpc_productid,12);
 	str[12]=0;
 	printk("Product ID: %s ",str);
 
+	summit_check(oem, str);
+
 	printk("APIC at: 0x%lX\n",mpc->mpc_lapic);
 
 	/* 
@@ -465,6 +471,7 @@ static int __init smp_read_mpc(struct mp_config_table *mpc)
 		}
 		++mpc_record;
 	}
+	clustered_apic_check();
 	if (!num_processors)
 		printk(KERN_ERR "SMP mptable: no processors registered!\n");
 	return num_processors;

arch/i386/mach-generic/mach_apic.h

@@ -20,4 +20,14 @@ static inline unsigned long calculate_ldr(unsigned long old)
 #define APIC_BROADCAST_ID      0x0F
 #define check_apicid_used(bitmap, apicid) (bitmap & (1 << apicid))
 
+static inline void summit_check(char *oem, char *productid) 
+{
+}
+
+static inline void clustered_apic_check(void)
+{
+	printk("Enabling APIC mode:  %s.  Using %d I/O APICs\n",
+		(clustered_apic_mode ? "NUMA-Q" : "Flat"), nr_ioapics);
+}
+
 #endif /* __ASM_MACH_APIC_H */

arch/i386/mach-summit/mach_apic.h

@@ -26,4 +26,16 @@ static inline unsigned long calculate_ldr(unsigned long old)
 #define APIC_BROADCAST_ID     (x86_summit ? 0xFF : 0x0F)
 #define check_apicid_used(bitmap, apicid) (0)
 
+static inline void summit_check(char *oem, char *productid)
+{
+	if (!strncmp(oem, "IBM ENSW", 8) && !strncmp(str, "VIGIL SMP", 9))
+		x86_summit = 1;
+}
+
+static inline void clustered_apic_check(void)
+{
+	printk("Enabling APIC mode:  %s.  Using %d I/O APICs\n",
+		(x86_summit ? "Summit" : "Flat"), nr_ioapics);
+}
+
 #endif /* __ASM_MACH_APIC_H */