/*	$NetBSD: vmparam.h,v 1.30 2004/01/23 04:03:38 simonb Exp $	*/

/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * William Jolitz.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)vmparam.h	5.9 (Berkeley) 5/12/91
 */

#ifndef _NS532_VMPARAM_H_
#define	_NS532_VMPARAM_H_

/*
 * Machine dependent constants for 532.
 */

/*
 * The NS32532 has 4K pages.  Override the PAGE_* definitions to
 * be compile-time constants.
 */
#define	PAGE_SHIFT	12
#define	PAGE_SIZE	(1 << PAGE_SHIFT)
#define	PAGE_MASK	(PAGE_SIZE - 1)

/*
 * Virtual address space arrangement. On 532, both user and kernel
 * share the address space, not unlike the vax.
 * USRSTACK is the top (end) of the user stack. Immediately above the
 * user stack resides the user structure, which is UPAGES long and contains
 * the kernel stack.
 *
 * Immediately after the user structure is the page table map, and then
 * kernal address space.
 */
#define	USRSTACK	VM_MAXUSER_ADDRESS

/*
 * INTSTACK is a temporary stack for the idle process and cpu_exit.
 */
#define	INTSTACK	(0xffc00000 + PAGE_SIZE - 4)

/*
 * Virtual memory related constants, all in bytes
 */
#define	MAXTSIZ		(16*1024*1024)		/* max text size */
#ifndef DFLDSIZ
#define	DFLDSIZ		(24*1024*1024)		/* initial data size limit */
#endif
#ifndef MAXDSIZ
#define	MAXDSIZ		(128*1024*1024)		/* max data size */
#endif
#ifndef	DFLSSIZ
#define	DFLSSIZ		(1*1024*1024)		/* initial stack size limit */
#endif
#ifndef	MAXSSIZ
#define	MAXSSIZ		(8*1024*1024)		/* max stack size */
#endif

/*
 * Size of shared memory map
 */
#ifndef SHMMAXPGS
#define	SHMMAXPGS	1024
#endif

/*
 * PTEs for mapping user space into the kernel for phyio operations.
 * One page is enough to handle 4Mb of simultaneous raw IO operations.
 */
#ifndef USRIOSIZE
#define	USRIOSIZE	(1 * NPTEPG)	/* 4mb */
#endif

/*
 * Mach derived constants
 */

/* user/kernel map constants */
#define	VM_MIN_ADDRESS		((vaddr_t)0)
/* (PDSLOT_PTE << PDSHIFT) */
#define	VM_MAXUSER_ADDRESS	((vaddr_t)0xDFC00000)
/* (PDSLOT_PTE << PDSHIFT) + (PDSLOT_PTE << PGSHIFT) */
#define	VM_MAX_ADDRESS		((vaddr_t)0xDFFDF000)
/* PDSLOT_KERN << PDSHIFT */
#define	VM_MIN_KERNEL_ADDRESS	((vaddr_t)0xE0000000)
/* PDSLOT_APTE << PDSHIFT */
#define	VM_MAX_KERNEL_ADDRESS	((vaddr_t)0xFF800000)

/* XXX max. amount of KVM to be used by buffers. */
#ifndef VM_MAX_KERNEL_BUF
#define	VM_MAX_KERNEL_BUF \
	((VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS) / 1024 * 7 / 10 * 1024)
#endif

/* virtual sizes (bytes) for various kernel submaps */
#define	VM_PHYS_SIZE		(USRIOSIZE*PAGE_SIZE)

#define	VM_PHYSSEG_MAX		1	/* we have contiguous memory */
#define	VM_PHYSSEG_STRAT	VM_PSTRAT_RANDOM
#define	VM_PHYSSEG_NOADD		/* can't add RAM after vm_mem_init */

#define	VM_NFREELIST		1
#define	VM_FREELIST_DEFAULT	0

#define	__HAVE_PMAP_PHYSSEG

/*
 * pmap specific data stored in the vm_physmem[] array
 */
struct pmap_physseg {
	struct pv_head *pvhead; 	/* pv_head array */
	short *attrs;			/* attrs array */
};

#endif