diff --git a/arch/i386/mach-es7000/es7000.h b/arch/i386/mach-es7000/es7000.h
index 70691f0c4ce28a8ae5cd9b6fb7fa517c5d6ba509..898ed905e1195638c9e39594d0cd5495bd1a3d59 100644
--- a/arch/i386/mach-es7000/es7000.h
+++ b/arch/i386/mach-es7000/es7000.h
@@ -104,7 +104,8 @@ struct mip_reg {
 #define	MIP_SW_APIC		0x1020b
 #define	MIP_FUNC(VALUE) 	(VALUE & 0xff)
 
-extern int parse_unisys_oem (char *oemptr, int oem_entries);
-extern int find_unisys_acpi_oem_table(unsigned long *oem_addr, int *length);
+extern int parse_unisys_oem (char *oemptr);
+extern int find_unisys_acpi_oem_table(unsigned long *oem_addr);
+extern void setup_unisys ();
 extern int es7000_start_cpu(int cpu, unsigned long eip);
 extern void es7000_sw_apic(void);
diff --git a/arch/i386/mach-es7000/es7000plat.c b/arch/i386/mach-es7000/es7000plat.c
index d5936d500479f235c89c11e51c431dd0ffaef819..2000bdca2fc2cc3a93a9c9393012bd5db707d91d 100644
--- a/arch/i386/mach-es7000/es7000plat.c
+++ b/arch/i386/mach-es7000/es7000plat.c
@@ -75,12 +75,29 @@ es7000_rename_gsi(int ioapic, int gsi)
 
 #endif // (CONFIG_X86_IO_APIC) && (CONFIG_ACPI_INTERPRETER || CONFIG_ACPI_BOOT)
 
+void __init
+setup_unisys ()
+{
+	/*
+	 * Determine the generation of the ES7000 currently running.
+	 *
+	 * es7000_plat = 1 if the machine is a 5xx ES7000 box
+	 * es7000_plat = 2 if the machine is a x86_64 ES7000 box
+	 *
+	 */
+	if (!(boot_cpu_data.x86 <= 15 && boot_cpu_data.x86_model <= 2))
+		es7000_plat = 2;
+	else
+		es7000_plat = 1;
+	ioapic_renumber_irq = es7000_rename_gsi;
+}
+
 /*
  * Parse the OEM Table
  */
 
 int __init
-parse_unisys_oem (char *oemptr, int oem_entries)
+parse_unisys_oem (char *oemptr)
 {
 	int                     i;
 	int 			success = 0;
@@ -95,7 +112,7 @@ parse_unisys_oem (char *oemptr, int oem_entries)
 
 	tp += 8;
 
-	for (i=0; i <= oem_entries; i++) {
+	for (i=0; i <= 6; i++) {
 		type = *tp++;
 		size = *tp++;
 		tp -= 2;
@@ -130,34 +147,18 @@ parse_unisys_oem (char *oemptr, int oem_entries)
 		default:
 			break;
 		}
-		if (i == 6) break;
 		tp += size;
 	}
 
 	if (success < 2) {
 		es7000_plat = 0;
-	} else {
-		printk("\nEnabling ES7000 specific features...\n");
-		/*
-		 * Determine the generation of the ES7000 currently running.
-		 *
-		 * es7000_plat = 0 if the machine is NOT a Unisys ES7000 box
-		 * es7000_plat = 1 if the machine is a 5xx ES7000 box
-		 * es7000_plat = 2 if the machine is a x86_64 ES7000 box
-		 *
-		 */
-		if (!(boot_cpu_data.x86 <= 15 && boot_cpu_data.x86_model <= 2))
-			es7000_plat = 2;
-		else
-			es7000_plat = 1;
-
-		ioapic_renumber_irq = es7000_rename_gsi;
-	}
+	} else
+		setup_unisys();
 	return es7000_plat;
 }
 
 int __init
-find_unisys_acpi_oem_table(unsigned long *oem_addr, int *length)
+find_unisys_acpi_oem_table(unsigned long *oem_addr)
 {
 	struct acpi_table_rsdp		*rsdp = NULL;
 	unsigned long			rsdp_phys = 0;
@@ -201,13 +202,11 @@ find_unisys_acpi_oem_table(unsigned long *oem_addr, int *length)
 				acpi_table_print(header, sdt.entry[i].pa);
 				t = (struct oem_table *) __acpi_map_table(sdt.entry[i].pa, header->length);
 				addr = (void *) __acpi_map_table(t->OEMTableAddr, t->OEMTableSize);
-				*length = header->length;
 				*oem_addr = (unsigned long) addr;
 				return 0;
 			}
 		}
 	}
-	Dprintk("ES7000: did not find Unisys ACPI OEM table!\n");
 	return -1;
 }
 
diff --git a/include/asm-i386/mach-es7000/mach_mpparse.h b/include/asm-i386/mach-es7000/mach_mpparse.h
index 85809e0898d7d3cf93f9ae414cd091bc5097f5e8..28a84f6185a789834bdf753dc4e17e1bba8636c8 100644
--- a/include/asm-i386/mach-es7000/mach_mpparse.h
+++ b/include/asm-i386/mach-es7000/mach_mpparse.h
@@ -1,6 +1,8 @@
 #ifndef __ASM_MACH_MPPARSE_H
 #define __ASM_MACH_MPPARSE_H
 
+#include <linux/acpi.h>
+
 static inline void mpc_oem_bus_info(struct mpc_config_bus *m, char *name, 
 				struct mpc_config_translation *translation)
 {
@@ -12,8 +14,9 @@ static inline void mpc_oem_pci_bus(struct mpc_config_bus *m,
 {
 }
 
-extern int parse_unisys_oem (char *oemptr, int oem_entries);
-extern int find_unisys_acpi_oem_table(unsigned long *oem_addr, int *length);
+extern int parse_unisys_oem (char *oemptr);
+extern int find_unisys_acpi_oem_table(unsigned long *oem_addr);
+extern void setup_unisys();
 
 static inline int mps_oem_check(struct mp_config_table *mpc, char *oem,
 		char *productid)
@@ -22,18 +25,33 @@ static inline int mps_oem_check(struct mp_config_table *mpc, char *oem,
 		struct mp_config_oemtable *oem_table = 
 			(struct mp_config_oemtable *)mpc->mpc_oemptr;
 		if (!strncmp(oem, "UNISYS", 6))
-			return parse_unisys_oem((char *)oem_table, oem_table->oem_length);
+			return parse_unisys_oem((char *)oem_table);
 	}
 	return 0;
 }
 
+static inline int es7000_check_dsdt()
+{
+	struct acpi_table_header *header = NULL;
+	if(!acpi_get_table_header_early(ACPI_DSDT, &header))
+		acpi_table_print(header, 0);
+	if (!strncmp(header->oem_id, "UNISYS", 6))
+		return 1;
+	return 0;
+}
+
 /* Hook from generic ACPI tables.c */
 static inline int acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 {
 	unsigned long oem_addr; 
-	int oem_entries;
-	if (!find_unisys_acpi_oem_table(&oem_addr, &oem_entries))
-		return parse_unisys_oem((char *)oem_addr, oem_entries);
+	if (!find_unisys_acpi_oem_table(&oem_addr)) {
+		if (es7000_check_dsdt())
+			return parse_unisys_oem((char *)oem_addr);
+		else {
+			setup_unisys();
+			return 1;
+		}
+	}
 	return 0;
 }