| /* |
| * |
| * 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/config.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 */ |
| |