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/* 
 *
 * 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 */


Filemanager

Name Type Size Permission Actions
sn2 Folder 0755
acpi.h File 423 B 0644
addrs.h File 9.69 KB 0644
arch.h File 2.72 KB 0644
bte.h File 7.61 KB 0644
clksupport.h File 844 B 0644
geo.h File 3.51 KB 0644
intr.h File 2.24 KB 0644
io.h File 5.68 KB 0644
ioc3.h File 7.91 KB 0644
klconfig.h File 10.15 KB 0644
l1.h File 2.28 KB 0644
leds.h File 819 B 0644
module.h File 4.01 KB 0644
mspec.h File 1.78 KB 0644
nodepda.h File 2.21 KB 0644
pcibr_provider.h File 5.52 KB 0644
pcibus_provider_defs.h File 2.16 KB 0644
pcidev.h File 3.05 KB 0644
pda.h File 1.94 KB 0644
pic.h File 9.06 KB 0644
rw_mmr.h File 944 B 0644
shub_mmr.h File 26.25 KB 0644
shubio.h File 127.34 KB 0644
simulator.h File 917 B 0644
sn_cpuid.h File 4.24 KB 0644
sn_feature_sets.h File 1.61 KB 0644
sn_sal.h File 33.14 KB 0644
tioca.h File 20.21 KB 0644
tioca_provider.h File 6 KB 0644
tioce.h File 29.87 KB 0644
tioce_provider.h File 1.49 KB 0644
tiocp.h File 8.3 KB 0644
tiocx.h File 2.24 KB 0644
types.h File 957 B 0644