[PATCH] - SN support for older versions of PROM

[Jack Steiner <steiner@sgi.com>]

Add support for old versions of SN PROMs. Eventually this
support will be deleted but it is useful right now to continue 
supporting older PROMs.

(The support for older PROMs use to be in the tree. It was 
deleted by accident).

	Signed-off-by: Jack Steiner <steiner@sgi.com>


Index: linux/include/asm/sn/sn_sal.h
=================================--- linux.orig/include/asm/sn/sn_sal.h	2005-11-17 22:38:30.741828181 -0600
+++ linux/include/asm/sn/sn_sal.h	2005-11-18 09:06:12.328192683 -0600
@@ -1018,6 +1018,24 @@ ia64_sn_get_sn_info(int fc, u8 *shubtype
 	ret_stuff.v2 = 0;
 	SAL_CALL_NOLOCK(ret_stuff, SN_SAL_GET_SN_INFO, fc, 0, 0, 0, 0, 0, 0);
 
+/***** BEGIN HACK - temp til old proms no longer supported ********/
+	if (ret_stuff.status = SALRET_NOT_IMPLEMENTED) {
+		int nasid = get_sapicid() & 0xfff;;
+#define SH_SHUB_ID_NODES_PER_BIT_MASK 0x001f000000000000UL                                               
+#define SH_SHUB_ID_NODES_PER_BIT_SHFT 48                                                               
+		if (shubtype) *shubtype = 0;
+		if (nasid_bitmask) *nasid_bitmask = 0x7ff;
+		if (nasid_shift) *nasid_shift = 38;
+		if (systemsize) *systemsize = 10;
+		if (sharing_domain_size) *sharing_domain_size = 8;
+		if (partid) *partid = sn_partition_serial_number;
+		if (coher) *coher = nasid >> 9;
+		if (reg) *reg = (HUB_L((u64 *) LOCAL_MMR_ADDR(SH1_SHUB_ID)) & 
+				 SH_SHUB_ID_NODES_PER_BIT_MASK) >> SH_SHUB_ID_NODES_PER_BIT_SHFT;
+		return 0;
+	}
+/***** END HACK *******/
+
 	if (ret_stuff.status < 0)
 		return ret_stuff.status;