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/* $NetBSD: vmparam.h,v 1.66.10.1 2023/05/15 10:37:24 martin 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 _MIPS_VMPARAM_H_
#define _MIPS_VMPARAM_H_
#ifdef _KERNEL_OPT
#include "opt_cputype.h"
#include "opt_multiprocessor.h"
#include "opt_modular.h"
#endif
/*
* Machine dependent VM constants for MIPS.
*/
/*
* We normally use a 4K page but may use 16K on MIPS systems.
* Override PAGE_* definitions to compile-time constants.
*/
#ifdef ENABLE_MIPS_16KB_PAGE
#define PAGE_SHIFT 14
#elif defined(ENABLE_MIPS_8KB_PAGE) \
|| (!defined(ENABLE_MIPS_4KB_PAGE) && __mips >= 3)
#define PAGE_SHIFT 13
#else /* defined(ENABLE_MIPS_4KB_PAGE) */
#define PAGE_SHIFT 12
#endif
#define PAGE_SIZE (1 << PAGE_SHIFT)
#define PAGE_MASK (PAGE_SIZE - 1)
#define MIN_PAGE_SHIFT 12
#define MAX_PAGE_SHIFT 14
#define MAX_PAGE_SIZE (1 << MAX_PAGE_SHIFT)
#define MIN_PAGE_SIZE (1 << MIN_PAGE_SHIFT)
/*
* USRSTACK is the top (end) of the user stack.
*
* USRSTACK needs to start a little below 0x8000000 because the R8000
* and some QED CPUs perform some virtual address checks before the
* offset is calculated. We use 0x8000 since that's the max displacement
* in an instruction.
*/
#define USRSTACK (VM_MAXUSER_ADDRESS-0x8000) /* Start of user stack */
#define USRSTACK32 ((uint32_t)VM_MAXUSER_ADDRESS32-0x8000)
/*
* Virtual memory related constants, all in bytes
*/
#if defined(__mips_o32)
#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 (512*1024*1024) /* max data size */
#endif
#ifndef DFLSSIZ
#define DFLSSIZ (4*1024*1024) /* initial stack size limit */
#endif
#ifndef MAXSSIZ
#define MAXSSIZ (32*1024*1024) /* max stack size */
#endif
#else
/*
* 64-bit ABIs need more space.
*/
#ifndef MAXTSIZ
#define MAXTSIZ (128*1024*1024) /* max text size */
#endif
#ifndef DFLDSIZ
#define DFLDSIZ (256*1024*1024) /* initial data size limit */
#endif
#ifndef MAXDSIZ
#define MAXDSIZ (1536*1024*1024) /* max data size */
#endif
#ifndef DFLSSIZ
#define DFLSSIZ (4*1024*1024) /* initial stack size limit */
#endif
#ifndef MAXSSIZ
#define MAXSSIZ (120*1024*1024) /* max stack size */
#endif
#endif /* !__mips_o32 */
/*
* Virtual memory related constants, all in bytes
*/
#ifndef DFLDSIZ32
#define DFLDSIZ32 DFLDSIZ /* initial data size limit */
#endif
#ifndef MAXDSIZ32
#define MAXDSIZ32 MAXDSIZ /* max data size */
#endif
#ifndef DFLSSIZ32
#define DFLSSIZ32 DFLTSIZ /* initial stack size limit */
#endif
#ifndef MAXSSIZ32
#define MAXSSIZ32 MAXSSIZ /* max stack size */
#endif
/*
* PTEs for mapping user space into the kernel for phyio operations.
* The default PTE number is enough to cover 8 disks * MAXBSIZE.
*/
#ifndef USRIOSIZE
#define USRIOSIZE (MAXBSIZE/PAGE_SIZE * 8)
#endif
/*
* Mach derived constants
*/
/*
* user/kernel map constants
* These are negative addresses since MIPS addresses are signed.
*/
#define VM_MIN_ADDRESS ((vaddr_t)0x00000000)
#ifdef _LP64
#define MIPS_VM_MAXUSER_ADDRESS ((vaddr_t) 1L << 40)
#ifdef ENABLE_MIPS_16KB_PAGE
#define VM_MAXUSER_ADDRESS mips_vm_maxuser_address
#else
#define VM_MAXUSER_ADDRESS MIPS_VM_MAXUSER_ADDRESS
#endif
#define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS /* 0x0000010000000000 */
#define VM_MIN_KERNEL_ADDRESS ((vaddr_t) 3L << 62) /* 0xC000000000000000 */
#define VM_MAX_KERNEL_ADDRESS ((vaddr_t) -1L << 31) /* 0xFFFFFFFF80000000 */
#else
#define VM_MAXUSER_ADDRESS ((vaddr_t)-0x7fffffff-1)/* 0xFFFFFFFF80000000 */
#define VM_MAX_ADDRESS ((vaddr_t)-0x7fffffff-1)/* 0xFFFFFFFF80000000 */
#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)-0x40000000) /* 0xFFFFFFFFC0000000 */
#ifdef ENABLE_MIPS_TX3900
#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)-0x01000000) /* 0xFFFFFFFFFF000000 */
#else
#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)-0x00004000) /* 0xFFFFFFFFFFFFC000 */
#endif
#endif
#define VM_MAXUSER_ADDRESS32 ((vaddr_t)(1UL << 31)) /* 0x0000000080000000 */
/*
* The address to which unspecified mapping requests default
*/
#define __USE_TOPDOWN_VM
#define VM_DEFAULT_ADDRESS_TOPDOWN(da, sz) \
trunc_page(USRSTACK - MAXSSIZ - (sz) - user_stack_guard_size)
#define VM_DEFAULT_ADDRESS_BOTTOMUP(da, sz) \
round_page((vaddr_t)(da) + (vsize_t)maxdmap)
#define VM_DEFAULT_ADDRESS32_TOPDOWN(da, sz) \
trunc_page(USRSTACK32 - MAXSSIZ32 - (sz) - user_stack_guard_size)
#define VM_DEFAULT_ADDRESS32_BOTTOMUP(da, sz) \
round_page((vaddr_t)(da) + (vsize_t)MAXDSIZ32)
/* virtual sizes (bytes) for various kernel submaps */
#define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE)
/* VM_PHYSSEG_MAX defined by platform-dependent code. */
#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
#ifndef VM_NFREELIST
#define VM_NFREELIST 16 /* 16 distinct memory segments */
#define VM_FREELIST_DEFAULT 0
#define VM_FREELIST_MAX 1
#endif
#ifdef _KERNEL
#ifdef ENABLE_MIPS_16KB_PAGE
extern vaddr_t mips_vm_maxuser_address;
#endif
#endif
#endif /* ! _MIPS_VMPARAM_H_ */
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