Annotation of sys/arch/arm/include/vmparam.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: vmparam.h,v 1.3 2005/04/11 15:13:01 deraadt Exp $ */
! 2: /* $NetBSD: vmparam.h,v 1.18 2003/05/21 18:04:44 thorpej Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 2001, 2002 Wasabi Systems, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * Written by Jason R. Thorpe for Wasabi Systems, Inc.
! 9: *
! 10: * Redistribution and use in source and binary forms, with or without
! 11: * modification, are permitted provided that the following conditions
! 12: * are met:
! 13: * 1. Redistributions of source code must retain the above copyright
! 14: * notice, this list of conditions and the following disclaimer.
! 15: * 2. Redistributions in binary form must reproduce the above copyright
! 16: * notice, this list of conditions and the following disclaimer in the
! 17: * documentation and/or other materials provided with the distribution.
! 18: * 3. All advertising materials mentioning features or use of this software
! 19: * must display the following acknowledgement:
! 20: * This product includes software developed for the NetBSD Project by
! 21: * Wasabi Systems, Inc.
! 22: * 4. The name of Wasabi Systems, Inc. may not be used to endorse
! 23: * or promote products derived from this software without specific prior
! 24: * written permission.
! 25: *
! 26: * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
! 27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 28: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 29: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
! 30: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 31: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 32: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 33: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 34: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 35: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 36: * POSSIBILITY OF SUCH DAMAGE.
! 37: */
! 38:
! 39: #ifndef _ARM_ARM_VMPARAM_H_
! 40: #define _ARM_ARM_VMPARAM_H_
! 41:
! 42: #ifdef _KERNEL
! 43:
! 44: /*
! 45: * Virtual Memory parameters common to all arm32 platforms.
! 46: */
! 47:
! 48: #include <sys/lock.h> /* struct simplelock */
! 49: #include <arm/pte.h> /* pt_entry_t */
! 50: #endif /* _KERNEL */
! 51:
! 52: #define USRTEXT VM_MIN_ADDRESS
! 53: #define USRSTACK VM_MAXUSER_ADDRESS
! 54: #define KERNBASE VM_MAXUSER_ADDRESS
! 55:
! 56: /*
! 57: * Note that MAXTSIZ can't be larger than 32M, otherwise the compiler
! 58: * would have to be changed to not generate "bl" instructions.
! 59: */
! 60: #define MAXTSIZ (16*1024*1024) /* max text size */
! 61: #ifndef DFLDSIZ
! 62: #define DFLDSIZ (128*1024*1024) /* initial data size limit */
! 63: #endif
! 64: #ifndef MAXDSIZ
! 65: #define MAXDSIZ (512*1024*1024) /* max data size */
! 66: #endif
! 67: #ifndef DFLSSIZ
! 68: #define DFLSSIZ (2*1024*1024) /* initial stack size limit */
! 69: #endif
! 70: #ifndef MAXSSIZ
! 71: #define MAXSSIZ (8*1024*1024) /* max stack size */
! 72: #endif
! 73:
! 74: #define STACKGAP_RANDOM 256*1024
! 75:
! 76: /*
! 77: * Size of SysV shared memory map
! 78: */
! 79: #ifndef SHMMAXPGS
! 80: #define SHMMAXPGS 1024
! 81: #endif
! 82:
! 83: /*
! 84: * While the ARM architecture defines Section mappings, large pages,
! 85: * and small pages, the standard page size is (and will always be) 4K.
! 86: */
! 87: #define PAGE_SHIFT 12
! 88: #define PAGE_SIZE (1 << PAGE_SHIFT) /* bytes/page */
! 89: #define PAGE_MASK (PAGE_SIZE - 1)
! 90:
! 91: /*
! 92: * Mach derived constants
! 93: */
! 94: #define VM_MIN_ADDRESS ((vaddr_t) 0x00001000)
! 95: #define VM_MAXUSER_ADDRESS ((vaddr_t) ARM_KERNEL_BASE)
! 96: #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
! 97:
! 98: #define VM_MIN_KERNEL_ADDRESS ((vaddr_t) ARM_KERNEL_BASE)
! 99: #define VM_MAX_KERNEL_ADDRESS ((vaddr_t) 0xffffffff)
! 100:
! 101: #ifdef _KERNEL
! 102:
! 103: /* XXX max. amount of KVM to be used by buffers. */
! 104: #ifndef VM_MAX_KERNEL_BUF
! 105: extern vaddr_t virtual_avail;
! 106: extern vaddr_t virtual_end;
! 107:
! 108: #define VM_MAX_KERNEL_BUF \
! 109: ((virtual_end - virtual_avail) * 4 / 10)
! 110: #endif
! 111:
! 112: /*
! 113: * pmap-specific data store in the vm_page structure.
! 114: */
! 115: #define __HAVE_VM_PAGE_MD
! 116: struct vm_page_md {
! 117: struct pv_entry *pvh_list; /* pv_entry list */
! 118: struct simplelock pvh_slock; /* lock on this head */
! 119: int pvh_attrs; /* page attributes */
! 120: u_int uro_mappings;
! 121: u_int urw_mappings;
! 122: union {
! 123: u_short s_mappings[2]; /* Assume kernel count <= 65535 */
! 124: u_int i_mappings;
! 125: } k_u;
! 126: #define kro_mappings k_u.s_mappings[0]
! 127: #define krw_mappings k_u.s_mappings[1]
! 128: #define k_mappings k_u.i_mappings
! 129: };
! 130:
! 131: #define VM_MDPAGE_INIT(pg) \
! 132: do { \
! 133: (pg)->mdpage.pvh_list = NULL; \
! 134: simple_lock_init(&(pg)->mdpage.pvh_slock); \
! 135: (pg)->mdpage.pvh_attrs = 0; \
! 136: (pg)->mdpage.uro_mappings = 0; \
! 137: (pg)->mdpage.urw_mappings = 0; \
! 138: (pg)->mdpage.k_mappings = 0; \
! 139: } while (/*CONSTCOND*/0)
! 140:
! 141: #endif /* _KERNEL */
! 142:
! 143: #endif /* _ARM_ARM_VMPARAM_H_ */
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