/*      $OpenBSD: vmparam.h,v 1.31 2023/11/16 13:47:22 deraadt Exp $    */
/*      $NetBSD: vmparam.h,v 1.5 1994/10/26 21:10:10 cgd Exp $  */

/*
 * Copyright (c) 1988 University of Utah.
 * Copyright (c) 1992, 1993
 *      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 and Ralph Campbell.
 *
 * 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   8.2 (Berkeley) 4/22/94
 */

#ifndef _MIPS64_VMPARAM_H_
#define _MIPS64_VMPARAM_H_

/*
 * Machine dependent constants mips processors.
 */

#define USRSTACK        VM_MAXUSER_ADDRESS      /* Start of user stack */

/*
 * Virtual memory related constants, all in bytes
 */
#ifndef MAXTSIZ
#define MAXTSIZ         (128*1024*1024)         /* max text size */
#endif
#ifndef DFLDSIZ
#define DFLDSIZ         (128*1024*1024)         /* initial data size limit */
#endif
#ifndef MAXDSIZ
#define MAXDSIZ         (16UL*1024*1024*1024)   /* max data size */
#endif
#ifndef BRKSIZ
#define BRKSIZ          MAXDSIZ                 /* heap gap size */
#endif
#ifndef DFLSSIZ
#define DFLSSIZ         (2*1024*1024)           /* initial stack size limit */
#endif
#ifndef MAXSSIZ
#define MAXSSIZ         (32*1024*1024)          /* max stack size */
#endif

#define STACKGAP_RANDOM 256*1024

/*
 * PTEs for mapping user space into the kernel for physio operations.
 * 16 pte's are enough to cover 8 disks * MAXBSIZE.
 */
#ifndef USRIOSIZE
#define USRIOSIZE       32
#endif

/*
 * PTEs for system V style shared memory.
 * This is basically slop for kmempt which we actually allocate (malloc) from.
 */
#ifndef SHMMAXPGS
#define SHMMAXPGS       8192            /* 8mb */
#endif

#ifndef VM_PHYSSEG_MAX
#define VM_PHYSSEG_MAX  8       /* Max number of physical memory segments */
#endif
#ifndef VM_PHYSSEG_STRAT
#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
#endif
#define VM_PHYSSEG_NOADD

/* user/kernel map constants */
#define VM_MIN_ADDRESS          ((vaddr_t)0x0000000000004000L)
#define VM_MAXUSER_ADDRESS      ((vaddr_t)0x0000010000000000L)
#define VM_MAX_ADDRESS          VM_MAXUSER_ADDRESS
#ifdef _KERNEL
#define VM_MIN_STACK_ADDRESS    ((vaddr_t)0x000000c000000000L)
#endif
#define VM_MIN_KERNEL_ADDRESS   ((vaddr_t)0xc000000000000000L)
#define VM_MAX_KERNEL_ADDRESS   ((vaddr_t)0xc000000040000000L)

/* map PIE into approximately the first quarter of user va space */
#define VM_PIE_MIN_ADDR         PAGE_SIZE
#define VM_PIE_MAX_ADDR         (0x4000000000UL)

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

#endif /* !_MIPS64_VMPARAM_H_ */