--- /dev/null
+/*
+ *
+ * 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) 2000-2005 Silicon Graphics, Inc. All rights reserved.
+ */
+
+
+#ifndef _ASM_IA64_SN_SN_CPUID_H
+#define _ASM_IA64_SN_SN_CPUID_H
+
+#include <linux/smp.h>
+#include <asm/sn/addrs.h>
+#include <asm/sn/pda.h>
+#include <asm/intrinsics.h>
+
+
+/*
+ * Functions for converting between cpuids, nodeids and NASIDs.
+ *
+ * These are for SGI platforms only.
+ *
+ */
+
+
+
+
+/*
+ * Definitions of terms (these definitions are for IA64 ONLY. Other architectures
+ * use cpuid/cpunum quite defferently):
+ *
+ * CPUID - a number in range of 0..NR_CPUS-1 that uniquely identifies
+ * the cpu. The value cpuid has no significance on IA64 other than
+ * the boot cpu is 0.
+ * smp_processor_id() returns the cpuid of the current cpu.
+ *
+ * CPU_PHYSICAL_ID (also known as HARD_PROCESSOR_ID)
+ * This is the same as 31:24 of the processor LID register
+ * hard_smp_processor_id()- cpu_physical_id of current processor
+ * cpu_physical_id(cpuid) - convert a <cpuid> to a <physical_cpuid>
+ * cpu_logical_id(phy_id) - convert a <physical_cpuid> to a <cpuid>
+ * * not real efficient - don't use in perf critical code
+ *
+ * SLICE - a number in the range of 0 - 3 (typically) that represents the
+ * cpu number on a brick.
+ *
+ * SUBNODE - (almost obsolete) the number of the FSB that a cpu is
+ * connected to. This is also the same as the PI number. Usually 0 or 1.
+ *
+ * NOTE!!!: the value of the bits in the cpu physical id (SAPICid or LID) of a cpu has no
+ * significance. The SAPIC id (LID) is a 16-bit cookie that has meaning only to the PROM.
+ *
+ *
+ * The macros convert between cpu physical ids & slice/nasid/cnodeid.
+ * These terms are described below:
+ *
+ *
+ * Brick
+ * ----- ----- ----- ----- CPU
+ * | 0 | | 1 | | 0 | | 1 | SLICE
+ * ----- ----- ----- -----
+ * | | | |
+ * | | | |
+ * 0 | | 2 0 | | 2 FSB SLOT
+ * ------- -------
+ * | |
+ * | |
+ * | |
+ * ------------ -------------
+ * | | | |
+ * | SHUB | | SHUB | NASID (0..MAX_NASIDS)
+ * | |----- | | CNODEID (0..num_compact_nodes-1)
+ * | | | |
+ * | | | |
+ * ------------ -------------
+ * | |
+ *
+ *
+ */
+
+#define get_node_number(addr) NASID_GET(addr)
+
+/*
+ * NOTE: on non-MP systems, only cpuid 0 exists
+ */
+
+extern short physical_node_map[]; /* indexed by nasid to get cnode */
+
+/*
+ * Macros for retrieving info about current cpu
+ */
+#define get_nasid() (sn_nodepda->phys_cpuid[smp_processor_id()].nasid)
+#define get_subnode() (sn_nodepda->phys_cpuid[smp_processor_id()].subnode)
+#define get_slice() (sn_nodepda->phys_cpuid[smp_processor_id()].slice)
+#define get_cnode() (sn_nodepda->phys_cpuid[smp_processor_id()].cnode)
+#define get_sapicid() ((ia64_getreg(_IA64_REG_CR_LID) >> 16) & 0xffff)
+
+/*
+ * Macros for retrieving info about an arbitrary cpu
+ * cpuid - logical cpu id
+ */
+#define cpuid_to_nasid(cpuid) (sn_nodepda->phys_cpuid[cpuid].nasid)
+#define cpuid_to_subnode(cpuid) (sn_nodepda->phys_cpuid[cpuid].subnode)
+#define cpuid_to_slice(cpuid) (sn_nodepda->phys_cpuid[cpuid].slice)
+
+
+/*
+ * Dont use the following in performance critical code. They require scans
+ * of potentially large tables.
+ */
+extern int nasid_slice_to_cpuid(int, int);
+
+/*
+ * cnodeid_to_nasid - convert a cnodeid to a NASID
+ */
+#define cnodeid_to_nasid(cnodeid) (sn_cnodeid_to_nasid[cnodeid])
+
+/*
+ * nasid_to_cnodeid - convert a NASID to a cnodeid
+ */
+#define nasid_to_cnodeid(nasid) (physical_node_map[nasid])
+
+/*
+ * partition_coherence_id - get the coherence ID of the current partition
+ */
+extern u8 sn_coherency_id;
+#define partition_coherence_id() (sn_coherency_id)
+
+#endif /* _ASM_IA64_SN_SN_CPUID_H */
+
Code Review / kvmfornfv.git / blobdiff