xref: /src/sys/arch/evbcf/include/vmparam.h

/*	$NetBSD: vmparam.h,v 1.2 2014/03/18 18:20:41 riastradh Exp $	*/
/*-
 * Copyright (c) 2013 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Matt Thomas of 3am Software Foundry.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

#ifndef _EVBCF_VMPARAM_H_
#define _EVBCF_VMPARAM_H_

/*
 * Machine dependent VM constants for EVBCF (Coldfire)
 */

/*
 * We use 4K pages on coldfire.  Override the PAGE_* definitions
 * to be compile-time constants.
 */
#define	PAGE_SHIFT	PGSHIFT
#define	PAGE_SIZE	(1 << PAGE_SHIFT)
#define	PAGE_MASK	(PAGE_SIZE - 1)

/*
 * USRSTACK is the top (end) of the user stack.
 */
#define	USRSTACK	VM_MAXUSER_ADDRESS	/* Start of user stack */

/*
 * Virtual memory related constants, all in bytes
 */
#ifndef MAXTSIZ
#define	MAXTSIZ		(16*1024*1024)		/* max text size */
#endif
#ifndef DFLDSIZ
#define	DFLDSIZ		(64*1024*1024)		/* initial data size limit */
#endif
#ifndef MAXDSIZ
#define	MAXDSIZ		(128*1024*1024)		/* max data size */
#endif
#ifndef	DFLSSIZ
#define	DFLSSIZ		(512*1024)		/* initial stack size limit */
#endif
#ifndef	MAXSSIZ
#define	MAXSSIZ		(16*1024*1024)		/* max stack size */
#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

/* user/kernel map constants */
#define VM_MIN_ADDRESS		((vaddr_t)0)
#define VM_MAXUSER_ADDRESS	((vaddr_t)0xBFF00000)
#define VM_MAX_ADDRESS		((vaddr_t)0xFFF00000)
#define VM_MIN_KERNEL_ADDRESS	((vaddr_t)0xC0000000)
#define VM_MAX_KERNEL_ADDRESS	((vaddr_t)-PAGE_SIZE)

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

/*
 * Constants which control the way the VM system deals with memory segments.
 * The evbcf port has one physical memory segment.
 */
#define	VM_PHYSSEG_MAX		1
#define	VM_PHYSSEG_STRAT	VM_PSTRAT_RANDOM

#define	VM_NFREELIST		1
#define	VM_FREELIST_DEFAULT	0

#endif /* _EVBCF_VMPARAM_H_ */