/*      $NetBSD: vmparam.h,v 1.35 2023/01/06 10:28:28 tsutsui Exp $     */

/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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.
*
* from: Utah $Hdr: vmparam.h 1.16 91/01/18$
*
*      @(#)vmparam.h   7.3 (Berkeley) 5/7/91
*/

#ifndef _MACHINE_VMPARAM_H_
#define _MACHINE_VMPARAM_H_

/*
* Machine dependent constants for atari
*/

/*
* Use common m68k definitions to define PAGE_SIZE and related constants.
*/
#include <m68k/vmparam.h>

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

/*
* Virtual memory related constants, all in bytes
*/

#ifndef MAXTSIZ
#define MAXTSIZ         (32*1024*1024)          /* max text size */
#endif
#ifndef DFLDSIZ
#define DFLDSIZ         (32*1024*1024)          /* initial data size limit */
#endif
#ifndef MAXDSIZ
#define MAXDSIZ         (256*1024*1024)         /* max data size */
#endif
#ifndef DFLSSIZ
#define DFLSSIZ         (2*1024*1024)           /* initial stack size limit */
#endif
#ifndef MAXSSIZ
#define MAXSSIZ         (256*1024*1024)         /* max stack size */
#endif

/*
* PTEs for mapping user space into the kernel for phyio operations.
* One page is enough to handle 16Mb of simultaneous raw IO operations.
*/
#ifndef USRIOSIZE
#define USRIOSIZE       (1 * NPTEPG)    /* 16mb */
#endif

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

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

/*
* Our bootloader currently passes up to 2 segments (ST and TT ram).
* On the other hand, Milan has four SIMM slots with 2 banks
* so it could have upto 8 segments.
*/
#define VM_PHYSSEG_MAX          (8)
#define VM_PHYSSEG_STRAT        VM_PSTRAT_RANDOM

#define VM_NFREELIST            2
#define VM_FREELIST_DEFAULT     0
#define VM_FREELIST_TTRAM       VM_FREELIST_DEFAULT
#define VM_FREELIST_STRAM       1

#define __HAVE_PMAP_PHYSSEG

/*
* pmap-specific data stored in the vm_physmem[] array.
*/
struct pmap_physseg {
       struct pv_header *pvheader;     /* pv table for this seg */
};


/*
* number of kernel PT pages (initial only, can grow dynamically)
*/
#define VM_KERNEL_PT_PAGES      ((vsize_t)4)
#endif /* !_MACHINE_VMPARAM_H_ */