diff --git a/arch/ia64/sn/kernel/setup.c b/arch/ia64/sn/kernel/setup.c
index 14908ad..6f8c588 100644
--- a/arch/ia64/sn/kernel/setup.c
+++ b/arch/ia64/sn/kernel/setup.c
@@ -49,6 +49,7 @@
 #include <asm/sn/clksupport.h>
 #include <asm/sn/sn_sal.h>
 #include <asm/sn/geo.h>
+#include <asm/sn/sn_feature_sets.h>
 #include "xtalk/xwidgetdev.h"
 #include "xtalk/hubdev.h"
 #include <asm/sn/klconfig.h>
@@ -97,6 +98,7 @@
 int sn_prom_type;	/* 0=hardware, 1=medusa/realprom, 2=medusa/fakeprom */
 
 short physical_node_map[MAX_PHYSNODE_ID];
+static unsigned long sn_prom_features[MAX_PROM_FEATURE_SETS];
 
 EXPORT_SYMBOL(physical_node_map);
 
@@ -271,7 +273,10 @@
 	u32 version = sn_sal_rev();
 	extern void sn_cpu_init(void);
 
-	ia64_sn_plat_set_error_handling_features();
+	ia64_sn_plat_set_error_handling_features();	// obsolete
+	ia64_sn_set_os_feature(OSF_MCA_SLV_TO_OS_INIT_SLV);
+	ia64_sn_set_os_feature(OSF_FEAT_LOG_SBES);
+
 
 #if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
 	/*
@@ -314,16 +319,6 @@
 
 	printk("SGI SAL version %x.%02x\n", version >> 8, version & 0x00FF);
 
-	/*
-	 * Confirm the SAL we're running on is recent enough...
-	 */
-	if (version < SN_SAL_MIN_VERSION) {
-		printk(KERN_ERR "This kernel needs SGI SAL version >= "
-		       "%x.%02x\n", SN_SAL_MIN_VERSION >> 8,
-		        SN_SAL_MIN_VERSION & 0x00FF);
-		panic("PROM version too old\n");
-	}
-
 	master_nasid = boot_get_nasid();
 
 	status =
@@ -480,6 +475,10 @@
 	if (nodepdaindr[0] == NULL)
 		return;
 
+	for (i = 0; i < MAX_PROM_FEATURE_SETS; i++)
+		if (ia64_sn_get_prom_feature_set(i, &sn_prom_features[i]) != 0)
+			break;
+
 	cpuid = smp_processor_id();
 	cpuphyid = get_sapicid();
 
@@ -651,3 +650,12 @@
 
 	return -1;
 }
+
+int sn_prom_feature_available(int id)
+{
+	if (id >= BITS_PER_LONG * MAX_PROM_FEATURE_SETS)
+		return 0;
+	return test_bit(id, sn_prom_features);
+}
+EXPORT_SYMBOL(sn_prom_feature_available);
+
diff --git a/include/asm-ia64/sn/sn_feature_sets.h b/include/asm-ia64/sn/sn_feature_sets.h
new file mode 100644
index 0000000..e68a808
--- /dev/null
+++ b/include/asm-ia64/sn/sn_feature_sets.h
@@ -0,0 +1,57 @@
+#ifndef _ASM_IA64_SN_FEATURE_SETS_H
+#define _ASM_IA64_SN_FEATURE_SETS_H
+
+/*
+ * SN PROM Features
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (c) 2005 Silicon Graphics, Inc.  All rights reserved.
+ */
+
+
+#include <asm/types.h>
+#include <asm/bitops.h>
+
+/* --------------------- PROM Features -----------------------------*/
+extern int sn_prom_feature_available(int id);
+
+#define MAX_PROM_FEATURE_SETS			2
+
+/*
+ * The following defines features that may or may not be supported by the
+ * current PROM. The OS uses sn_prom_feature_available(feature) to test for
+ * the presence of a PROM feature. Down rev (old) PROMs will always test
+ * "false" for new features.
+ *
+ * Use:
+ * 		if (sn_prom_feature_available(PRF_FEATURE_XXX))
+ * 			...
+ */
+
+/*
+ * Example: feature XXX
+ */
+#define PRF_FEATURE_XXX		0
+
+
+
+/* --------------------- OS Features -------------------------------*/
+
+/*
+ * The following defines OS features that are optionally present in
+ * the operating system.
+ * During boot, PROM is notified of these features via a series of calls:
+ *
+ * 		ia64_sn_set_os_feature(feature1);
+ *
+ * Once enabled, a feature cannot be disabled.
+ *
+ * By default, features are disabled unless explicitly enabled.
+ */
+#define  OSF_MCA_SLV_TO_OS_INIT_SLV		0
+#define  OSF_FEAT_LOG_SBES			1
+
+#endif /* _ASM_IA64_SN_FEATURE_SETS_H */
diff --git a/include/asm-ia64/sn/sn_sal.h b/include/asm-ia64/sn/sn_sal.h
index e67825a..fea35b3 100644
--- a/include/asm-ia64/sn/sn_sal.h
+++ b/include/asm-ia64/sn/sn_sal.h
@@ -80,6 +80,9 @@
 #define SN_SAL_RESERVED_DO_NOT_USE		   0x02000062
 #define SN_SAL_IOIF_GET_PCI_TOPOLOGY		   0x02000064
 
+#define  SN_SAL_GET_PROM_FEATURE_SET		   0x02000065
+#define  SN_SAL_SET_OS_FEATURE_SET		   0x02000066
+
 /*
  * Service-specific constants
  */
@@ -118,8 +121,8 @@
 /*
  * Error Handling Features
  */
-#define SAL_ERR_FEAT_MCA_SLV_TO_OS_INIT_SLV	0x1
-#define SAL_ERR_FEAT_LOG_SBES			0x2
+#define SAL_ERR_FEAT_MCA_SLV_TO_OS_INIT_SLV	0x1	// obsolete
+#define SAL_ERR_FEAT_LOG_SBES			0x2	// obsolete
 #define SAL_ERR_FEAT_MFR_OVERRIDE		0x4
 #define SAL_ERR_FEAT_SBE_THRESHOLD		0xffff0000
 
@@ -152,12 +155,6 @@
 }
 
 /*
- * Specify the minimum PROM revsion required for this kernel.
- * Note that they're stored in hex format...
- */
-#define SN_SAL_MIN_VERSION	0x0404
-
-/*
  * Returns the master console nasid, if the call fails, return an illegal
  * value.
  */
@@ -336,7 +333,7 @@
 }
 
 /*
- * Set Error Handling Features
+ * Set Error Handling Features	(Obsolete)
  */
 static inline u64
 ia64_sn_plat_set_error_handling_features(void)
@@ -1052,4 +1049,25 @@
 	return (rv.status == 0);
 }
 
+static inline int
+ia64_sn_get_prom_feature_set(int set, unsigned long *feature_set)
+{
+	struct ia64_sal_retval rv;
+
+	SAL_CALL_NOLOCK(rv, SN_SAL_GET_PROM_FEATURE_SET, set, 0, 0, 0, 0, 0, 0);
+	if (rv.status != 0)
+		return rv.status;
+	*feature_set = rv.v0;
+	return 0;
+}
+
+static inline int
+ia64_sn_set_os_feature(int feature)
+{
+	struct ia64_sal_retval rv;
+
+	SAL_CALL_NOLOCK(rv, SN_SAL_SET_OS_FEATURE_SET, feature, 0, 0, 0, 0, 0, 0);
+	return rv.status;
+}
+
 #endif /* _ASM_IA64_SN_SN_SAL_H */