Annotation of sys/arch/alpha/include/vmparam.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: vmparam.h,v 1.14 2005/04/11 15:12:59 deraadt Exp $ */
! 2: /* $NetBSD: vmparam.h,v 1.18 2000/05/22 17:13:54 thorpej Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1988 University of Utah.
! 6: * Copyright (c) 1992, 1993
! 7: * The Regents of the University of California. All rights reserved.
! 8: *
! 9: * This code is derived from software contributed to Berkeley by
! 10: * the Systems Programming Group of the University of Utah Computer
! 11: * Science Department and Ralph Campbell.
! 12: *
! 13: * Redistribution and use in source and binary forms, with or without
! 14: * modification, are permitted provided that the following conditions
! 15: * are met:
! 16: * 1. Redistributions of source code must retain the above copyright
! 17: * notice, this list of conditions and the following disclaimer.
! 18: * 2. Redistributions in binary form must reproduce the above copyright
! 19: * notice, this list of conditions and the following disclaimer in the
! 20: * documentation and/or other materials provided with the distribution.
! 21: * 3. Neither the name of the University nor the names of its contributors
! 22: * may be used to endorse or promote products derived from this software
! 23: * without specific prior written permission.
! 24: *
! 25: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 26: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 27: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 28: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 29: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 30: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 31: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 32: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 33: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 34: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 35: * SUCH DAMAGE.
! 36: *
! 37: * from: Utah $Hdr: vmparam.h 1.16 91/01/18$
! 38: *
! 39: * @(#)vmparam.h 8.2 (Berkeley) 4/22/94
! 40: */
! 41:
! 42: #ifndef _ALPHA_VMPARAM_H_
! 43: #define _ALPHA_VMPARAM_H_
! 44:
! 45: /*
! 46: * Machine dependent constants for Alpha.
! 47: */
! 48:
! 49: /*
! 50: * USRTEXT is the start of the user text/data space, while USRSTACK
! 51: * is the top (end) of the user stack. Immediately above the user stack
! 52: * resides the user structure, which is UPAGES long and contains the
! 53: * kernel stack.
! 54: *
! 55: * Digital UNIX (formerly DEC OSF/1) places the stack below the
! 56: * text segment (i.e. growing downward from 4G). We may want to
! 57: * consider doing that at some point, but it might require changes
! 58: * to the exec code.
! 59: */
! 60: #define USRTEXT NBPG
! 61: #define USRSTACK ((vaddr_t)0x0000000200000000) /* 8G */
! 62:
! 63: /*
! 64: * Virtual memory related constants, all in bytes
! 65: */
! 66: #ifndef MAXTSIZ
! 67: #define MAXTSIZ (1<<30) /* max text size (1G) */
! 68: #endif
! 69: #ifndef DFLDSIZ
! 70: #define DFLDSIZ (1<<27) /* initial data size (128M) */
! 71: #endif
! 72: #ifndef MAXDSIZ
! 73: #define MAXDSIZ (1<<30) /* max data size (1G) */
! 74: #endif
! 75: #ifndef DFLSSIZ
! 76: #define DFLSSIZ (1<<21) /* initial stack size (2M) */
! 77: #endif
! 78: #ifndef MAXSSIZ
! 79: #define MAXSSIZ (1<<25) /* max stack size (32M) */
! 80: #endif
! 81:
! 82: #define STACKGAP_RANDOM 256*1024
! 83:
! 84: /*
! 85: * PTEs for mapping user space into the kernel for phyio operations.
! 86: * 64 pte's are enough to cover 8 disks * MAXBSIZE.
! 87: */
! 88: #ifndef USRIOSIZE
! 89: #define USRIOSIZE 64
! 90: #endif
! 91:
! 92: /*
! 93: * PTEs for system V style shared memory.
! 94: * This is basically slop for kmempt which we actually allocate (malloc) from.
! 95: */
! 96: #ifndef SHMMAXPGS
! 97: #define SHMMAXPGS 4096 /* 32mb */
! 98: #endif
! 99:
! 100: /*
! 101: * Mach derived constants
! 102: */
! 103:
! 104: /* user/kernel map constants */
! 105: #define VM_MIN_ADDRESS ((vaddr_t)ALPHA_USEG_BASE) /* 0 */
! 106: #define VM_MAXUSER_ADDRESS ((vaddr_t)(ALPHA_USEG_END + 1L)) /* 4T */
! 107: #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
! 108: #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)ALPHA_K1SEG_BASE)
! 109: #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)ALPHA_K1SEG_END)
! 110:
! 111: /* virtual sizes (bytes) for various kernel submaps */
! 112: #define VM_PHYS_SIZE (USRIOSIZE*NBPG)
! 113:
! 114: /* some Alpha-specific constants */
! 115: #define VPTBASE ((vaddr_t)0xfffffffc00000000) /* Virt. pg table */
! 116:
! 117: #define VM_PHYSSEG_MAX 16 /* XXX */
! 118: #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
! 119: #define VM_PHYSSEG_NOADD /* no more after vm_mem_init */
! 120:
! 121: #define VM_NFREELIST 1
! 122: #define VM_FREELIST_DEFAULT 0
! 123:
! 124: /*
! 125: * pmap-specific data stored in the vm_physmem[] array.
! 126: */
! 127: #define __HAVE_PMAP_PHYSSEG
! 128: struct pmap_physseg {
! 129: struct pv_head *pvhead; /* pv list of this seg */
! 130: };
! 131:
! 132: #endif /* ! _ALPHA_VMPARAM_H_ */
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