/*
* 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.
*
* SGI specific setup.
*
* Copyright (C) 1995-1997,1999,2001-2005 Silicon Graphics, Inc. All rights reserved.
* Copyright (C) 1999 Ralf Baechle ([email protected])
*/
#ifndef _ASM_IA64_SN_ARCH_H
#define _ASM_IA64_SN_ARCH_H

#include <linux/numa.h>
#include <asm/types.h>
#include <asm/percpu.h>
#include <asm/sn/types.h>
#include <asm/sn/sn_cpuid.h>

/*
* This is the maximum number of NUMALINK nodes that can be part of a single
* SSI kernel. This number includes C-brick, M-bricks, and TIOs. Nodes in
* remote partitions are NOT included in this number.
* The number of compact nodes cannot exceed size of a coherency domain.
* The purpose of this define is to specify a node count that includes
* all C/M/TIO nodes in an SSI system.
*
* SGI system can currently support up to 256 C/M nodes plus additional TIO nodes.
*
* Note: ACPI20 has an architectural limit of 256 nodes. When we upgrade
* to ACPI3.0, this limit will be removed. The notion of "compact nodes"
* should be deleted and TIOs should be included in MAX_NUMNODES.
*/
#define MAX_TIO_NODES MAX_NUMNODES
#define MAX_COMPACT_NODES (MAX_NUMNODES + MAX_TIO_NODES)

/*
* Maximum number of nodes in all partitions and in all coherency domains.
* This is the total number of nodes accessible in the numalink fabric. It
* includes all C & M bricks, plus all TIOs.
*
* This value is also the value of the maximum number of NASIDs in the numalink
* fabric.
*/
#define MAX_NUMALINK_NODES 16384

/*
* The following defines attributes of the HUB chip. These attributes are
* frequently referenced. They are kept in the per-cpu data areas of each cpu.
* They are kept together in a struct to minimize cache misses.
*/
struct sn_hub_info_s {
u8 shub2;
u8 nasid_shift;
u8 as_shift;
u8 shub_1_1_found;
u16 nasid_bitmask;
};
DECLARE_PER_CPU(struct sn_hub_info_s, __sn_hub_info);
#define sn_hub_info (&__get_cpu_var(__sn_hub_info))
#define is_shub2() (sn_hub_info->shub2)
#define is_shub1() (sn_hub_info->shub2 == 0)

/*
* Use this macro to test if shub 1.1 wars should be enabled
*/
#define enable_shub_wars_1_1() (sn_hub_info->shub_1_1_found)


/*
* Compact node ID to nasid mappings kept in the per-cpu data areas of each
* cpu.
*/
DECLARE_PER_CPU(short, __sn_cnodeid_to_nasid[MAX_COMPACT_NODES]);
#define sn_cnodeid_to_nasid (&__get_cpu_var(__sn_cnodeid_to_nasid[0]))


extern u8 sn_partition_id;
extern u8 sn_system_size;
extern u8 sn_sharing_domain_size;
extern u8 sn_region_size;

extern void sn_flush_all_caches(long addr, long bytes);
extern bool sn_cpu_disable_allowed(int cpu);

#endif /* _ASM_IA64_SN_ARCH_H */