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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.

 *

 * SGI specific setup.

 *

 * Copyright (C) 1995 - 1997, 1999 Silcon Graphics, Inc.

 * Copyright (C) 1999 Ralf Baechle (ralf@gnu.org)

 */

#ifndef _ASM_SN_ARCH_H

#define _ASM_SN_ARCH_H

#include <linux/types.h>

#include <linux/config.h>

#if !defined(CONFIG_SGI_IO)

#include <asm/sn/types.h>

#include <asm/sn/sn0/arch.h>

#endif

#ifndef __ASSEMBLY__

#if !defined(CONFIG_SGI_IO)

typedef u64     hubreg_t;

typedef u64     nic_t;

#endif

#endif

#ifdef CONFIG_SGI_IP27

#define CPUS_PER_NODE           2       /* CPUs on a single hub */

#define CPUS_PER_NODE_SHFT      1       /* Bits to shift in the node number */

#define CPUS_PER_SUBNODE        2       /* CPUs on a single hub PI */

#endif

#define CNODE_NUM_CPUS(_cnode)          (NODEPDA(_cnode)->node_num_cpus)

#define CNODE_TO_CPU_BASE(_cnode)       (NODEPDA(_cnode)->node_first_cpu)

#define cputocnode(cpu)                         \

               (cpu_data[(cpu)].p_nodeid)

#define cputonasid(cpu)                         \

               (cpu_data[(cpu)].p_nasid)

#define cputoslice(cpu)                         \

               (cpu_data[(cpu)].p_slice)

#define makespnum(_nasid, _slice)                                       \

                (((_nasid) << CPUS_PER_NODE_SHFT) | (_slice))

#ifndef __ASSEMBLY__

#define INVALID_NASID           (nasid_t)-1

#define INVALID_CNODEID         (cnodeid_t)-1

#define INVALID_PNODEID         (pnodeid_t)-1

#define INVALID_MODULE          (moduleid_t)-1

#define INVALID_PARTID          (partid_t)-1

extern nasid_t get_nasid(void);

extern cnodeid_t get_cpu_cnode(cpuid_t);

extern int get_cpu_slice(cpuid_t);

/*

 * NO ONE should access these arrays directly.  The only reason we refer to

 * them here is to avoid the procedure call that would be required in the

 * macros below.  (Really want private data members here :-)

 */

extern cnodeid_t nasid_to_compact_node[MAX_NASIDS];

extern nasid_t compact_to_nasid_node[MAX_COMPACT_NODES];

/*

 * These macros are used by various parts of the kernel to convert

 * between the three different kinds of node numbering.   At least some

 * of them may change to procedure calls in the future, but the macros

 * will continue to work.  Don't use the arrays above directly.

 */

#define NASID_TO_REGION(nnode)          \

    ((nnode) >> \

     (is_fine_dirmode() ? NASID_TO_FINEREG_SHFT : NASID_TO_COARSEREG_SHFT))

#if !defined(_STANDALONE)

extern cnodeid_t nasid_to_compact_node[MAX_NASIDS];

extern nasid_t compact_to_nasid_node[MAX_COMPACT_NODES];

extern cnodeid_t cpuid_to_compact_node[MAXCPUS];

#endif

#if !defined(DEBUG) && (!defined(SABLE) || defined(_STANDALONE))

#define NASID_TO_COMPACT_NODEID(nnode)  (nasid_to_compact_node[nnode])

#define COMPACT_TO_NASID_NODEID(cnode)  (compact_to_nasid_node[cnode])

#define CPUID_TO_COMPACT_NODEID(cpu)    (cpuid_to_compact_node[(cpu)])

#else

/*

 * These functions can do type checking and fail if they need to return

 * a bad nodeid, but they're not as fast so just use 'em for debug kernels.

 */

cnodeid_t nasid_to_compact_nodeid(nasid_t nasid);

nasid_t compact_to_nasid_nodeid(cnodeid_t cnode);

#define NASID_TO_COMPACT_NODEID(nnode)  nasid_to_compact_nodeid(nnode)

#define COMPACT_TO_NASID_NODEID(cnode)  compact_to_nasid_nodeid(cnode)

#define CPUID_TO_COMPACT_NODEID(cpu)    (cpuid_to_compact_node[(cpu)])

#endif

extern int node_getlastslot(cnodeid_t);

#endif /* !__ASSEMBLY__ */

#define SLOT_BITMASK            (MAX_MEM_SLOTS - 1)

#define SLOT_SIZE               (1LL<<SLOT_SHIFT)

#define node_getnumslots(node)  (MAX_MEM_SLOTS)

#define NODE_MAX_MEM_SIZE       SLOT_SIZE * MAX_MEM_SLOTS

/*

 * New stuff in here from Irix sys/pfdat.h.

 */

#define SLOT_PFNSHIFT           (SLOT_SHIFT - PAGE_SHIFT)

#define PFN_NASIDSHFT           (NASID_SHFT - PAGE_SHIFT)

#define mkpfn(nasid, off)       (((pfn_t)(nasid) << PFN_NASIDSHFT) | (off))

#define slot_getbasepfn(node,slot) \

                (mkpfn(COMPACT_TO_NASID_NODEID(node), slot<<SLOT_PFNSHIFT))

#endif /* _ASM_SN_ARCH_H */