7f30491ccd
After moving the the include files there were a few clean-ups: 1) Some files used #include <asm-ia64/xyz.h>, changed to <asm/xyz.h> 2) Some comments alerted maintainers to look at various header files to make matching updates if certain code were to be changed. Updated these comments to use the new include paths. 3) Some header files mentioned their own names in initial comments. Just deleted these self references. Signed-off-by: Tony Luck <tony.luck@intel.com>
132 lines
4.2 KiB
C
132 lines
4.2 KiB
C
/*
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2000-2005 Silicon Graphics, Inc. All rights reserved.
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*/
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#ifndef _ASM_IA64_SN_SN_CPUID_H
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#define _ASM_IA64_SN_SN_CPUID_H
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#include <linux/smp.h>
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#include <asm/sn/addrs.h>
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#include <asm/sn/pda.h>
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#include <asm/intrinsics.h>
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/*
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* Functions for converting between cpuids, nodeids and NASIDs.
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*
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* These are for SGI platforms only.
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*
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*/
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/*
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* Definitions of terms (these definitions are for IA64 ONLY. Other architectures
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* use cpuid/cpunum quite defferently):
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*
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* CPUID - a number in range of 0..NR_CPUS-1 that uniquely identifies
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* the cpu. The value cpuid has no significance on IA64 other than
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* the boot cpu is 0.
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* smp_processor_id() returns the cpuid of the current cpu.
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*
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* CPU_PHYSICAL_ID (also known as HARD_PROCESSOR_ID)
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* This is the same as 31:24 of the processor LID register
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* hard_smp_processor_id()- cpu_physical_id of current processor
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* cpu_physical_id(cpuid) - convert a <cpuid> to a <physical_cpuid>
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* cpu_logical_id(phy_id) - convert a <physical_cpuid> to a <cpuid>
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* * not real efficient - don't use in perf critical code
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*
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* SLICE - a number in the range of 0 - 3 (typically) that represents the
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* cpu number on a brick.
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*
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* SUBNODE - (almost obsolete) the number of the FSB that a cpu is
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* connected to. This is also the same as the PI number. Usually 0 or 1.
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*
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* NOTE!!!: the value of the bits in the cpu physical id (SAPICid or LID) of a cpu has no
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* significance. The SAPIC id (LID) is a 16-bit cookie that has meaning only to the PROM.
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*
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*
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* The macros convert between cpu physical ids & slice/nasid/cnodeid.
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* These terms are described below:
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*
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*
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* Brick
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* ----- ----- ----- ----- CPU
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* | 0 | | 1 | | 0 | | 1 | SLICE
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* ----- ----- ----- -----
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* | | | |
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* | | | |
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* 0 | | 2 0 | | 2 FSB SLOT
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* ------- -------
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* | |
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* | |
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* | |
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* ------------ -------------
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* | | | |
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* | SHUB | | SHUB | NASID (0..MAX_NASIDS)
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* | |----- | | CNODEID (0..num_compact_nodes-1)
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* | | | |
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* | | | |
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* ------------ -------------
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* | |
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*
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*
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*/
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#define get_node_number(addr) NASID_GET(addr)
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/*
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* NOTE: on non-MP systems, only cpuid 0 exists
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*/
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extern short physical_node_map[]; /* indexed by nasid to get cnode */
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/*
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* Macros for retrieving info about current cpu
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*/
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#define get_nasid() (sn_nodepda->phys_cpuid[smp_processor_id()].nasid)
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#define get_subnode() (sn_nodepda->phys_cpuid[smp_processor_id()].subnode)
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#define get_slice() (sn_nodepda->phys_cpuid[smp_processor_id()].slice)
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#define get_cnode() (sn_nodepda->phys_cpuid[smp_processor_id()].cnode)
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#define get_sapicid() ((ia64_getreg(_IA64_REG_CR_LID) >> 16) & 0xffff)
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/*
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* Macros for retrieving info about an arbitrary cpu
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* cpuid - logical cpu id
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*/
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#define cpuid_to_nasid(cpuid) (sn_nodepda->phys_cpuid[cpuid].nasid)
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#define cpuid_to_subnode(cpuid) (sn_nodepda->phys_cpuid[cpuid].subnode)
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#define cpuid_to_slice(cpuid) (sn_nodepda->phys_cpuid[cpuid].slice)
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/*
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* Dont use the following in performance critical code. They require scans
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* of potentially large tables.
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*/
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extern int nasid_slice_to_cpuid(int, int);
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/*
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* cnodeid_to_nasid - convert a cnodeid to a NASID
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*/
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#define cnodeid_to_nasid(cnodeid) (sn_cnodeid_to_nasid[cnodeid])
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/*
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* nasid_to_cnodeid - convert a NASID to a cnodeid
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*/
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#define nasid_to_cnodeid(nasid) (physical_node_map[nasid])
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/*
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* partition_coherence_id - get the coherence ID of the current partition
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*/
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extern u8 sn_coherency_id;
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#define partition_coherence_id() (sn_coherency_id)
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#endif /* _ASM_IA64_SN_SN_CPUID_H */
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