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553cb3ed46
sys/param.h was manually adjusted to not define __NetBSD_Version__ since it will be defined by the compiler.
181 lines
5.8 KiB
C
Vendored
181 lines
5.8 KiB
C
Vendored
/* $NetBSD: vmparam.h,v 1.88 2022/08/21 13:15:15 riastradh Exp $ */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* 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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* William Jolitz.
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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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* @(#)vmparam.h 5.9 (Berkeley) 5/12/91
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*/
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#ifndef _I386_VMPARAM_H_
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#define _I386_VMPARAM_H_
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#include <sys/mutex.h>
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#include <machine/pte.h>
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/*
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* Machine dependent constants for 386.
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*/
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/*
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* Page size on the IA-32 is not variable in the traditional sense.
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* We override the PAGE_* definitions to compile-time constants.
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*/
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#define PAGE_SHIFT 12
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#define PAGE_SIZE (1 << PAGE_SHIFT)
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#define PAGE_MASK (PAGE_SIZE - 1)
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/*
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* Virtual address space arrangement. On 386, both user and kernel
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* share the address space, not unlike the vax.
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* USRSTACK is the top (end) of the user stack. Immediately above the
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* user stack is the page table map, and then kernel address space.
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*/
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#define USRSTACK VM_MAXUSER_ADDRESS
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/*
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* Virtual memory related constants, all in bytes
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*/
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#define MAXTSIZ (256*1024*1024) /* max text size */
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#ifndef DFLDSIZ
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#define DFLDSIZ (256*1024*1024) /* initial data size limit */
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#endif
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#ifndef MAXDSIZ
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#define MAXDSIZ (3U*1024*1024*1024) /* 3G max data size */
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#endif
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#ifndef MAXDSIZ_BU
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#define MAXDSIZ_BU (2U*1024*1024*1024 + /* 2.5G max data size for */ \
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1U* 512*1024*1024) /* bottom-up allocation */ \
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/* could be a bit more */
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#endif
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#ifndef DFLSSIZ
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#define DFLSSIZ (2*1024*1024) /* initial stack size limit */
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#endif
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#ifndef MAXSSIZ
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#define MAXSSIZ (64*1024*1024) /* max stack size */
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#endif
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/*
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* IA-32 can't do per-page execute permission, so instead we implement
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* two executable segments for %cs, one that covers everything and one
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* that excludes some of the address space (currently just the stack).
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* I386_MAX_EXE_ADDR is the upper boundary for the smaller segment.
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*/
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#define I386_MAX_EXE_ADDR (USRSTACK - MAXSSIZ)
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/*
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* Size of User Raw I/O map
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*/
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#define USRIOSIZE 300
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/*
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* See pmap_private.h for details.
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*/
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#ifdef PAE
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#define L2_SLOT_PTE (KERNBASE/NBPD_L2-4) /* 1532: for recursive PDP map */
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#define L2_SLOT_KERN (KERNBASE/NBPD_L2) /* 1536: start of kernel space */
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#else /* PAE */
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#define L2_SLOT_PTE (KERNBASE/NBPD_L2-1) /* 767: for recursive PDP map */
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#define L2_SLOT_KERN (KERNBASE/NBPD_L2) /* 768: start of kernel space */
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#endif /* PAE */
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#define L2_SLOT_KERNBASE L2_SLOT_KERN
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#define PDIR_SLOT_KERN L2_SLOT_KERN
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#define PDIR_SLOT_PTE L2_SLOT_PTE
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/* size of a PDP: usually one page, except for PAE */
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#ifdef PAE
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#define PDP_SIZE 4
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#else
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#define PDP_SIZE 1
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#endif
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/* largest value (-1 for APTP space) */
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#define NKL2_MAX_ENTRIES (NTOPLEVEL_PDES - (KERNBASE/NBPD_L2) - 1)
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#define NKL1_MAX_ENTRIES (unsigned long)(NKL2_MAX_ENTRIES * NPDPG)
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#define NKL2_KIMG_ENTRIES 0 /* XXX unused */
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#define NKL2_START_ENTRIES 0 /* XXX computed on runtime */
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#define NKL1_START_ENTRIES 0 /* XXX unused */
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#ifndef XENPV
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#define NTOPLEVEL_PDES (PAGE_SIZE * PDP_SIZE / (sizeof (pd_entry_t)))
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#else /* !XENPV */
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#ifdef PAE
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#define NTOPLEVEL_PDES 1964 /* 1964-2047 reserved by Xen */
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#else /* PAE */
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#define NTOPLEVEL_PDES 1008 /* 1008-1023 reserved by Xen */
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#endif /* PAE */
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#endif /* !XENPV */
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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 ((vaddr_t)0)
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#define VM_MAXUSER_ADDRESS ((vaddr_t)(PDIR_SLOT_PTE << L2_SHIFT) - PAGE_SIZE)
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#define VM_MAX_ADDRESS \
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((vaddr_t)((PDIR_SLOT_PTE << L2_SHIFT) + (PDIR_SLOT_PTE << L1_SHIFT)))
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#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)(PDIR_SLOT_KERN << L2_SHIFT))
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#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)((PDIR_SLOT_KERN + NKL2_MAX_ENTRIES) << L2_SHIFT))
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/*
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* The address to which unspecified mapping requests default
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*/
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#ifdef _KERNEL_OPT
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#include "opt_uvm.h"
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#include "opt_xen.h"
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#endif
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#define __USE_TOPDOWN_VM
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#define VM_DEFAULT_ADDRESS_BOTTOMUP(da, sz) \
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round_page((vaddr_t)(da) + (vsize_t)MIN(maxdmap, MAXDSIZ_BU))
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/* virtual sizes (bytes) for various kernel submaps */
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#define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE)
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#define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST
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#ifdef XENPV
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#define VM_PHYSSEG_MAX 1
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#define VM_NFREELIST 1
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#else
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#define VM_PHYSSEG_MAX 32 /* 1 "hole" + 31 free lists */
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#define VM_NFREELIST 4
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#define VM_FREELIST_FIRST16 3
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#define VM_FREELIST_FIRST1G 2
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#define VM_FREELIST_FIRST4G 1
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#endif /* XENPV */
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#define VM_FREELIST_DEFAULT 0
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#endif /* _I386_VMPARAM_H_ */ |