e79f2b9178
kernel by PHYS_TO_DMAP() as previously present on amd64, arm64, riscv, and powerpc64. This introduces a new MI macro (PMAP_HAS_DMAP) that can be evaluated at runtime to determine if the architecture has a direct map; if it does not (or does) unconditionally and PMAP_HAS_DMAP is either 0 or 1, the compiler can remove the conditional logic. As part of this, implement PHYS_TO_DMAP() on sparc64 and mips64, which had similar things but spelled differently. 32-bit MIPS has a partial direct-map that maps poorly to this concept and is unchanged. Reviewed by: kib Suggestions from: marius, alc, kib Runtime tested on: amd64, powerpc64, powerpc, mips64
201 lines
6.0 KiB
C
201 lines
6.0 KiB
C
/* $OpenBSD: vmparam.h,v 1.2 1998/09/15 10:50:12 pefo Exp $ */
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/* $NetBSD: vmparam.h,v 1.5 1994/10/26 21:10:10 cgd Exp $ */
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/*
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department and Ralph Campbell.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Utah Hdr: vmparam.h 1.16 91/01/18
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* @(#)vmparam.h 8.2 (Berkeley) 4/22/94
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* JNPR: vmparam.h,v 1.3.2.1 2007/09/10 06:01:28 girish
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* $FreeBSD$
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*/
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#ifndef _MACHINE_VMPARAM_H_
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#define _MACHINE_VMPARAM_H_
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/*
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* Machine dependent constants mips processors.
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*/
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/*
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* Virtual memory related constants, all in bytes
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*/
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#ifndef MAXTSIZ
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#define MAXTSIZ (128UL*1024*1024) /* max text size */
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#endif
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#ifndef DFLDSIZ
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#define DFLDSIZ (128UL*1024*1024) /* initial data size limit */
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#endif
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#ifndef MAXDSIZ
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#define MAXDSIZ (1*1024UL*1024*1024) /* max data size */
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#endif
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#ifndef DFLSSIZ
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#define DFLSSIZ (8UL*1024*1024) /* initial stack size limit */
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#endif
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#ifndef MAXSSIZ
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#define MAXSSIZ (64UL*1024*1024) /* max stack size */
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#endif
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#ifndef SGROWSIZ
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#define SGROWSIZ (128UL*1024) /* amount to grow stack */
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#endif
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/*
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* Mach derived constants
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*/
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/* user/kernel map constants */
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#define VM_MIN_ADDRESS ((vm_offset_t)0x00000000)
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#define VM_MAX_ADDRESS ((vm_offset_t)(intptr_t)(int32_t)0xffffffff)
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#define VM_MINUSER_ADDRESS ((vm_offset_t)0x00000000)
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#ifdef __mips_n64
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#define VM_MAXUSER_ADDRESS (VM_MINUSER_ADDRESS + (NPDEPG * NBSEG))
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#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)0xc000000000000000)
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#define VM_MAX_KERNEL_ADDRESS (VM_MIN_KERNEL_ADDRESS + (NPDEPG * NBSEG))
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#else
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#define VM_MAXUSER_ADDRESS ((vm_offset_t)0x80000000)
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#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)0xC0000000)
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#define VM_MAX_KERNEL_ADDRESS ((vm_offset_t)0xFFFFC000)
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#endif
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#define KERNBASE ((vm_offset_t)(intptr_t)(int32_t)0x80000000)
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/*
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* USRSTACK needs to start a little below 0x8000000 because the R8000
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* and some QED CPUs perform some virtual address checks before the
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* offset is calculated.
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*/
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#define USRSTACK (VM_MAXUSER_ADDRESS - PAGE_SIZE)
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#ifdef __mips_n64
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#define FREEBSD32_USRSTACK (((vm_offset_t)0x80000000) - PAGE_SIZE)
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#endif
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/*
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* Disable superpage reservations. (not sure if this is right
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* I copied it from ARM)
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*/
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#ifndef VM_NRESERVLEVEL
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#define VM_NRESERVLEVEL 0
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#endif
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/*
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* How many physical pages per kmem arena virtual page.
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*/
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#ifndef VM_KMEM_SIZE_SCALE
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#define VM_KMEM_SIZE_SCALE (3)
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#endif
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/*
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* Optional floor (in bytes) on the size of the kmem arena.
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*/
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#ifndef VM_KMEM_SIZE_MIN
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#define VM_KMEM_SIZE_MIN (12 * 1024 * 1024)
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#endif
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/*
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* Optional ceiling (in bytes) on the size of the kmem arena: 40% of the
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* kernel map.
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*/
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#ifndef VM_KMEM_SIZE_MAX
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#define VM_KMEM_SIZE_MAX ((VM_MAX_KERNEL_ADDRESS - \
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VM_MIN_KERNEL_ADDRESS + 1) * 2 / 5)
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#endif
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/* initial pagein size of beginning of executable file */
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#ifndef VM_INITIAL_PAGEIN
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#define VM_INITIAL_PAGEIN 16
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#endif
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#define UMA_MD_SMALL_ALLOC
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/*
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* max number of non-contig chunks of physical RAM you can have
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*/
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#define VM_PHYSSEG_MAX 32
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/*
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* The physical address space is sparsely populated.
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*/
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#define VM_PHYSSEG_SPARSE
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/*
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* Create two free page pools: VM_FREEPOOL_DEFAULT is the default pool
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* from which physical pages are allocated and VM_FREEPOOL_DIRECT is
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* the pool from which physical pages for small UMA objects are
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* allocated.
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*/
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#define VM_NFREEPOOL 2
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#define VM_FREEPOOL_DEFAULT 0
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#define VM_FREEPOOL_DIRECT 1
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/*
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* Create up to two free lists on !__mips_n64: VM_FREELIST_DEFAULT is for
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* physical pages that are above the largest physical address that is
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* accessible through the direct map (KSEG0) and VM_FREELIST_LOWMEM is for
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* physical pages that are below that address. VM_LOWMEM_BOUNDARY is the
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* physical address for the end of the direct map (KSEG0).
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*/
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#ifdef __mips_n64
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#define VM_NFREELIST 1
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#define VM_FREELIST_DEFAULT 0
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#define VM_FREELIST_DIRECT VM_FREELIST_DEFAULT
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#else
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#define VM_NFREELIST 2
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#define VM_FREELIST_DEFAULT 0
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#define VM_FREELIST_LOWMEM 1
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#define VM_FREELIST_DIRECT VM_FREELIST_LOWMEM
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#define VM_LOWMEM_BOUNDARY ((vm_paddr_t)0x20000000)
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#endif
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/*
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* The largest allocation size is 1MB.
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*/
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#define VM_NFREEORDER 9
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#define ZERO_REGION_SIZE (64 * 1024) /* 64KB */
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#ifndef __mips_n64
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#define SFBUF
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#define SFBUF_MAP
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#define PMAP_HAS_DMAP 0
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#else
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#define PMAP_HAS_DMAP 1
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#endif
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#define PHYS_TO_DMAP(x) MIPS_PHYS_TO_DIRECT(x)
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#define DMAP_TO_PHYS(x) MIPS_DIRECT_TO_PHYS(x)
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#endif /* !_MACHINE_VMPARAM_H_ */
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