146 lines
4.8 KiB
C
146 lines
4.8 KiB
C
/* $NetBSD: vmparam.h,v 1.26 2003/04/08 23:35:48 thorpej Exp $ */
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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*
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* @(#)vmparam.h 8.2 (Berkeley) 4/22/94
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*/
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#ifndef _ALPHA_VMPARAM_H_
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#define _ALPHA_VMPARAM_H_
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/*
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* Machine dependent constants for Alpha.
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*/
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/*
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* All systypes currently supported by NetBSD/alpha have an 8K pages.
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* Override the PAGE_* definitions to be compile-time constants.
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*/
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#define PAGE_SHIFT 13
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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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* USRSTACK is the top (end) of the user stack.
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*
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* Digital UNIX (formerly DEC OSF/1) places the stack below the
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* text segment (i.e. growing downward from 4G). We may want to
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* consider doing that at some point, but it might require changes
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* to the exec code.
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*/
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#define USRSTACK ((vaddr_t)0x0000000200000000) /* 8G */
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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 (1<<30) /* max text size (1G) */
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#endif
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#ifndef DFLDSIZ
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#define DFLDSIZ (1<<27) /* initial data size (128M) */
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#endif
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#ifndef MAXDSIZ
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#define MAXDSIZ (1<<30) /* max data size (1G) */
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#endif
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#ifndef DFLSSIZ
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#define DFLSSIZ (1<<21) /* initial stack size (2M) */
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#endif
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#ifndef MAXSSIZ
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#define MAXSSIZ (1<<25) /* max stack size (32M) */
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#endif
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/*
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* PTEs for mapping user space into the kernel for phyio operations.
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* 64 pte's are enough to cover 8 disks * MAXBSIZE.
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*/
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#ifndef USRIOSIZE
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#define USRIOSIZE 64
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#endif
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/*
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* PTEs for system V style shared memory.
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* This is basically slop for kmempt which we actually allocate (malloc) from.
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*/
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#ifndef SHMMAXPGS
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#define SHMMAXPGS 1024 /* 8mb */
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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 ((vaddr_t)ALPHA_USEG_BASE) /* 0 */
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#define VM_MAXUSER_ADDRESS ((vaddr_t)(ALPHA_USEG_END + 1L)) /* 4T */
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#define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
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#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)ALPHA_K1SEG_BASE)
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#define VM_MAX_KERNEL_ADDRESS trunc_page((vaddr_t)ALPHA_K1SEG_END)
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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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/* some Alpha-specific constants */
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#define VPTBASE ((vaddr_t)0xfffffffc00000000) /* Virt. pg table */
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#define VM_PHYSSEG_MAX 16 /* XXX */
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#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
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#define VM_PHYSSEG_NOADD /* no more after vm_mem_init */
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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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* pmap-specific data store in the vm_page structure.
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*/
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#define __HAVE_VM_PAGE_MD
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struct vm_page_md {
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struct pv_entry *pvh_list; /* pv_entry list */
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struct simplelock pvh_slock; /* lock on this head */
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int pvh_attrs; /* page attributes */
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};
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#define VM_MDPAGE_INIT(pg) \
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do { \
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(pg)->mdpage.pvh_list = NULL; \
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simple_lock_init(&(pg)->mdpage.pvh_slock); \
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} while (/*CONSTCOND*/0)
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#endif /* ! _ALPHA_VMPARAM_H_ */
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