/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _SYS_MEMNODE_H
#define	_SYS_MEMNODE_H

#ifdef	__cplusplus
extern "C" {
#endif

#ifdef	_KERNEL

#include <sys/lgrp.h>


/*
 * This file defines the mappings between physical addresses and memory
 * nodes. Memory nodes are defined so that the low-order bits are the
 * memory slice ID and the high-order bits are the SSM nodeid.
 */

#define	MAX_MEM_NODES_PER_LGROUP	3
#ifndef	MAX_MEM_NODES
#define	MAX_MEM_NODES			(8 * MAX_MEM_NODES_PER_LGROUP)
#endif	/* MAX_MEM_NODES */

#define	PFN_2_MEM_NODE(pfn)			\
	((max_mem_nodes > 1) ? plat_pfn_to_mem_node(pfn) : 0)

#define	MEM_NODE_2_LGRPHAND(mnode)		\
	((max_mem_nodes > 1) ? plat_mem_node_to_lgrphand(mnode) : \
	    LGRP_DEFAULT_HANDLE)

/*
 * Platmod hooks
 */

extern int plat_pfn_to_mem_node(pfn_t);
extern void plat_assign_lgrphand_to_mem_node(lgrp_handle_t, int);
extern lgrp_handle_t plat_mem_node_to_lgrphand(int);
extern void plat_slice_add(pfn_t, pfn_t);
extern void plat_slice_del(pfn_t, pfn_t);

#pragma	weak plat_pfn_to_mem_node
#pragma	weak plat_mem_node_to_lgrphand
#pragma	weak plat_slice_add
#pragma	weak plat_slice_del

struct	mem_node_conf {
	int	exists;		/* only try if set, list may still be empty */
	pfn_t	physbase;	/* lowest PFN in this memnode */
	pfn_t	physmax;	/* highest PFN in this memnode */
};

struct memlist;

extern void startup_build_mem_nodes(struct memlist *);
extern void mem_node_add_slice(pfn_t, pfn_t);
extern void mem_node_del_slice(pfn_t, pfn_t);
extern int mem_node_alloc(void);
extern pgcnt_t mem_node_memlist_pages(int, struct memlist *);
extern void mem_node_add_range(pfn_t, pfn_t);
extern void mem_node_del_range(pfn_t, pfn_t);

extern int plat_mnode_xcheck(pfn_t);

extern struct mem_node_conf	mem_node_config[];
extern uint64_t			mem_node_physalign;
extern int			mem_node_pfn_shift;
extern int			max_mem_nodes;

extern uint_t			lgrp_plat_node_cnt;

#endif	/* _KERNEL */

#ifdef	__cplusplus
}
#endif

#endif	/* _SYS_MEMNODE_H */