9a8196ce19
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
195 lines
5.3 KiB
C
195 lines
5.3 KiB
C
/* $NetBSD: vmparam.h,v 1.26 2003/08/07 16:27:47 agc 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 The Regents of the University of California.
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* All rights reserved.
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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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* $FreeBSD$
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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 for ARM.
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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 (256UL*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 (512UL*1024*1024) /* max data size */
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#endif
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#ifndef DFLSSIZ
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#define DFLSSIZ (2UL*1024*1024) /* initial stack size limit */
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#endif
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#ifndef MAXSSIZ
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#define MAXSSIZ (8UL*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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* Address space constants
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*/
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/*
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* The line between user space and kernel space
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* Mappings >= KERNEL_BASE are constant across all processes
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*/
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#ifndef KERNBASE
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#define KERNBASE 0xc0000000
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#endif
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/*
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* The virtual address the kernel is linked to run at. For armv4/5 platforms
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* the low-order 30 bits of this must match the low-order bits of the physical
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* address the kernel is loaded at, so the value is most often provided as a
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* kernel config option in the std.platform file. For armv6/7 the kernel can
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* be loaded at any 2MB boundary, and KERNVIRTADDR can also be set to any 2MB
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* boundary. It is typically overridden in the std.platform file only when
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* KERNBASE is also set to a lower address to provide more KVA.
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*/
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#ifndef KERNVIRTADDR
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#define KERNVIRTADDR 0xc0000000
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#endif
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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 may be sparsely populated on some ARM systems.
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*/
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#define VM_PHYSSEG_SPARSE
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/*
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* Create one free page pool. Since the ARM kernel virtual address
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* space does not include a mapping onto the machine's entire physical
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* memory, VM_FREEPOOL_DIRECT is defined as an alias for the default
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* pool, VM_FREEPOOL_DEFAULT.
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*/
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#define VM_NFREEPOOL 1
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#define VM_FREEPOOL_DEFAULT 0
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#define VM_FREEPOOL_DIRECT 0
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/*
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* We need just one free list: DEFAULT.
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*/
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#define VM_NFREELIST 1
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#define VM_FREELIST_DEFAULT 0
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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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/*
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* Enable superpage reservations: 1 level.
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*/
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#ifndef VM_NRESERVLEVEL
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#define VM_NRESERVLEVEL 1
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#endif
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/*
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* Level 0 reservations consist of 256 pages.
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*/
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#ifndef VM_LEVEL_0_ORDER
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#define VM_LEVEL_0_ORDER 8
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#endif
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#define VM_MIN_ADDRESS (0x00001000)
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#ifndef VM_MAXUSER_ADDRESS
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#define VM_MAXUSER_ADDRESS (KERNBASE - 0x00400000) /* !!! PT2MAP_SIZE */
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#endif
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#define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
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#define SHAREDPAGE (VM_MAXUSER_ADDRESS - PAGE_SIZE)
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#define USRSTACK SHAREDPAGE
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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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#ifndef VM_MIN_KERNEL_ADDRESS
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#define VM_MIN_KERNEL_ADDRESS KERNBASE
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#endif
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#define VM_MAX_KERNEL_ADDRESS (vm_max_kernel_address)
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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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extern vm_offset_t vm_max_kernel_address;
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#define ZERO_REGION_SIZE (64 * 1024) /* 64KB */
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#ifndef VM_MAX_AUTOTUNE_MAXUSERS
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#define VM_MAX_AUTOTUNE_MAXUSERS 384
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#endif
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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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#define DEVMAP_MAX_VADDR ARM_VECTORS_HIGH
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#endif /* _MACHINE_VMPARAM_H_ */
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