/*-
 * Copyright (c) 2001 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Matt Thomas <matt@3am-softwre.com> of Allegro Networks, Inc.
 *
 * 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 _POWERPC_OEA_VMPARAM_H_
#define _POWERPC_OEA_VMPARAM_H_

#include <sys/queue.h>

/*
 * Most of the definitions in this can be overridden by a machine-specific
 * vmparam.h if required.  Otherwise a port can just include this file
 * get the right thing to happen.
 */

/*
 * OEA processors have 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)

#ifndef USRSTACK
#define USRSTACK        VM_MAXUSER_ADDRESS
#endif

#ifndef USRSTACK32
#define USRSTACK32      VM_MAXUSER_ADDRESS32
#endif

#ifndef MAXTSIZ
#define MAXTSIZ         (256*1024*1024)         /* maximum text size */
#endif

#ifndef MAXDSIZ
#define MAXDSIZ         (1024*1024*1024)        /* maximum data size */
#endif

#ifndef MAXDSIZ32
#define MAXDSIZ32       (1024*1024*1024)        /* maximum data size */
#endif

#ifndef MAXSSIZ
#define MAXSSIZ         (32*1024*1024)          /* maximum stack size */
#endif

#ifndef MAXSSIZ32
#define MAXSSIZ32       (32*1024*1024)          /* maximum stack size */
#endif

#ifndef DFLDSIZ
#define DFLDSIZ         (256*1024*1024)         /* default data size */
#endif

#ifndef DFLDSIZ32
#define DFLSSIZ32       (256*1024*1024)
#endif

#ifndef DFLSSIZ
#define DFLSSIZ         (2*1024*1024)           /* default stack size */
#endif

#ifndef DFLSSIZ32
#define DFLSSIZ32       (2*1024*1024)           /* default stack size */
#endif

/*
 * Default number of pages in the user raw I/O map.
 */
#ifndef USRIOSIZE
#define USRIOSIZE       1024
#endif

/*
 * The number of seconds for a process to be blocked before being
 * considered very swappable.
 */
#ifndef MAXSLP
#define MAXSLP          20
#endif

/*
 * Segment handling stuff
 */
#define SEGMENT_LENGTH  ( 0x10000000L)
#define SEGMENT_MASK    (~0x0fffffffL)
#define NSEGREG         16      /* number of PowerPC segment registers */

/*
 * Macros to manipulate VSIDs
 */
#if 0
/*
 * Move the SR# to the top bits to make the lower bits entirely random
 * so to give better PTE distribution.
 */
#define VSID__KEYSHFT           (SR_VSID_WIDTH - SR_KEY_LEN)
#define VSID_SR_INCREMENT       ((1L << VSID__KEYSHFT) - 1)
#define VSID__HASHMASK          (VSID_SR_INCREMENT - 1)
#define VSID_MAKE(sr, hash) \
        (( \
            (((sr) << VSID__KEYSHFT) | ((hash) & VSID__HASMASK))
            << SR_VSID_SHFT) & SR_VSID)
#define VSID_TO_SR(vsid) \
        (((vsid) & SR_VSID) >> (SR_VSID_SHFT + VSID__KEYSHFT))
#define VSID_TO_HASH(vsid) \
        (((vsid) & SR_VSID) >> SR_VSID_SHFT) & VSID__HASHMASK)
#else
#define VSID__HASHSHFT          (SR_KEY_LEN)
#define VSID_SR_INCREMENT       (1L << 0)
#define VSID__KEYMASK           ((1L << VSID__HASHSHFT) - 1)
#define VSID_MAKE(sr, hash) \
        (( \
            (((hash) << VSID__HASHSHFT) | ((sr) & VSID__KEYMASK)) \
             << SR_VSID_SHFT) & SR_VSID)
#define VSID_TO_SR(vsid) \
        (((vsid) >> SR_VSID_SHFT) & VSID__KEYMASK)
#define VSID_TO_HASH(vsid) \
        (((vsid) & SR_VSID) >> (SR_VSID_SHFT + VSID__HASHSHFT))
#endif /*0*/

#ifndef _LP64
/*
 * Fixed segments
 */
#ifndef USER_SR
#define USER_SR                 12
#endif
#ifndef KERNEL_SR
#define KERNEL_SR               13
#endif
#ifndef KERNEL2_SR
#define KERNEL2_SR              14
#endif
#define KERNEL2_SEGMENT         VSID_MAKE(KERNEL2_SR, KERNEL_VSIDBITS)
#endif
#define KERNEL_VSIDBITS         0xfffff
#define PHYSMAP_VSIDBITS        0xffffe
#define PHYSMAPN_SEGMENT(s)     VSID_MAKE(s, PHYSMAP_VSIDBITS)
#define KERNEL_SEGMENT          VSID_MAKE(KERNEL_SR, KERNEL_VSIDBITS)
#define KERNELN_SEGMENT(s)      VSID_MAKE(s, KERNEL_VSIDBITS)
/* XXXSL: need something here that will never be mapped */
#define EMPTY_SEGMENT           VSID_MAKE(0, 0xffffe)
#define USER_ADDR               ((void *)(USER_SR << ADDR_SR_SHFT))

/*
 * Some system constants
 */
#ifndef NPMAPS
#define NPMAPS          32768   /* Number of pmaps in system */
#endif

#define VM_MIN_ADDRESS          ((vaddr_t) 0)
#define VM_MAXUSER_ADDRESS32    ((vaddr_t) (uint32_t) ~0xfffL)
#ifdef _LP64
#define VM_MAXUSER_ADDRESS      ((vaddr_t) 1UL << 48) /* 256TB */
#else
#define VM_MAXUSER_ADDRESS      VM_MAXUSER_ADDRESS32
#endif
#define VM_MAX_ADDRESS          VM_MAXUSER_ADDRESS
#ifdef _LP64
#define VM_MIN_KERNEL_ADDRESS   ((vaddr_t) 0xffffffUL << 40) /* top 1TB */
#define VM_MAX_KERNEL_ADDRESS   ((vaddr_t) -32768)
#else
#define VM_MIN_KERNEL_ADDRESS   ((vaddr_t) (KERNEL_SR << ADDR_SR_SHFT))
#define VM_MAX_KERNEL_ADDRESS   (VM_MIN_KERNEL_ADDRESS + 2*SEGMENT_LENGTH)
#endif

#define VM_PHYSSEG_STRAT        VM_PSTRAT_BIGFIRST

#ifndef VM_PHYS_SIZE
#define VM_PHYS_SIZE            (USRIOSIZE * PAGE_SIZE)
#endif

#endif /* _POWERPC_OEA_VMPARAM_H_ */