/* * * 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 */Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Jack Steiner | 45 | 36.89% | 3 | 25.00% |
| Linus Torvalds | 37 | 30.33% | 2 | 16.67% |
| David Mosberger-Tang | 19 | 15.57% | 1 | 8.33% |
| Dean Nelson | 10 | 8.20% | 2 | 16.67% |
| Jesse Barnes | 7 | 5.74% | 2 | 16.67% |
| Andrew Morton | 2 | 1.64% | 1 | 8.33% |
| Dean Roe | 2 | 1.64% | 1 | 8.33% |
| Total | 122 | 100.00% | 12 | 100.00% |