Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[linux-2.6.git] / include / asm-ia64 / sn / arch.h

diff --git a/include/asm-ia64/sn/arch.h b/include/asm-ia64/sn/arch.h
index bfc922a..16adc93 100644 (file)
--- a/include/asm-ia64/sn/arch.h
+++ b/include/asm-ia64/sn/arch.h
@@ -5,23 +5,80 @@
  *
  * SGI specific setup.
  *
- * Copyright (C) 1995-1997,1999,2001-2004 Silicon Graphics, Inc.  All rights reserved.
+ * Copyright (C) 1995-1997,1999,2001-2005 Silicon Graphics, Inc.  All rights reserved.
  * Copyright (C) 1999 Ralf Baechle (ralf@gnu.org)
  */
 #ifndef _ASM_IA64_SN_ARCH_H
 #define _ASM_IA64_SN_ARCH_H
 
+#include <linux/numa.h>
 #include <asm/types.h>
+#include <asm/percpu.h>
 #include <asm/sn/types.h>
 #include <asm/sn/sn_cpuid.h>
 
 /*
- * This is the maximum number of nodes that can be part of a kernel.
- * Effectively, it's the maximum number of compact node ids (cnodeid_t).
- * This is not necessarily the same as MAX_NASIDS.
+ * This is the maximum number of NUMALINK nodes that can be part of a single
+ * SSI kernel. This number includes C-brick, M-bricks, and TIOs. Nodes in
+ * remote partitions are NOT included in this number.
+ * The number of compact nodes cannot exceed size of a coherency domain.
+ * The purpose of this define is to specify a node count that includes
+ * all C/M/TIO nodes in an SSI system.
+ *
+ * SGI system can currently support up to 256 C/M nodes plus additional TIO nodes.
+ *
+ *     Note: ACPI20 has an architectural limit of 256 nodes. When we upgrade
+ *     to ACPI3.0, this limit will be removed. The notion of "compact nodes"
+ *     should be deleted and TIOs should be included in MAX_NUMNODES.
+ */
+#define MAX_TIO_NODES          MAX_NUMNODES
+#define MAX_COMPACT_NODES      (MAX_NUMNODES + MAX_TIO_NODES)
+
+/*
+ * Maximum number of nodes in all partitions and in all coherency domains.
+ * This is the total number of nodes accessible in the numalink fabric. It
+ * includes all C & M bricks, plus all TIOs.
+ *
+ * This value is also the value of the maximum number of NASIDs in the numalink
+ * fabric.
+ */
+#define MAX_NUMALINK_NODES     16384
+
+/*
+ * The following defines attributes of the HUB chip. These attributes are
+ * frequently referenced. They are kept in the per-cpu data areas of each cpu.
+ * They are kept together in a struct to minimize cache misses.
  */
-#define MAX_COMPACT_NODES      2048
-#define CPUS_PER_NODE          4
+struct sn_hub_info_s {
+       u8 shub2;
+       u8 nasid_shift;
+       u8 as_shift;
+       u8 shub_1_1_found;
+       u16 nasid_bitmask;
+};
+DECLARE_PER_CPU(struct sn_hub_info_s, __sn_hub_info);
+#define sn_hub_info    (&__get_cpu_var(__sn_hub_info))
+#define is_shub2()     (sn_hub_info->shub2)
+#define is_shub1()     (sn_hub_info->shub2 == 0)
+
+/*
+ * Use this macro to test if shub 1.1 wars should be enabled
+ */
+#define enable_shub_wars_1_1() (sn_hub_info->shub_1_1_found)
+
+
+/*
+ * Compact node ID to nasid mappings kept in the per-cpu data areas of each
+ * cpu.
+ */
+DECLARE_PER_CPU(short, __sn_cnodeid_to_nasid[MAX_COMPACT_NODES]);
+#define sn_cnodeid_to_nasid    (&__get_cpu_var(__sn_cnodeid_to_nasid[0]))
+
+
+extern u8 sn_partition_id;
+extern u8 sn_system_size;
+extern u8 sn_sharing_domain_size;
+extern u8 sn_region_size;
 
 extern void sn_flush_all_caches(long addr, long bytes);