1 /* $NetBSD: vmparam.h,v 1.13 2003/04/28 01:34:28 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1988 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef _ARM32_VMPARAM_H_ 37 #define _ARM32_VMPARAM_H_ 38 39 #ifdef _KERNEL 40 41 #include <arm/arm32/vmparam.h> 42 43 /* 44 * Address space constants 45 */ 46 47 /* 48 * The line between user space and kernel space 49 * Mappings >= KERNEL_BASE are constant across all processes 50 */ 51 #define KERNEL_BASE 0xf0000000 52 53 /* Various constants used by the MD code*/ 54 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00000000) 55 #ifndef ARM32_PMAP_NEW 56 #define APTE_BASE (KERNEL_BASE + 0x00c00000) 57 #endif 58 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 59 /* 60 * The Kernel VM Size varies depending on the machine depending on how 61 * much space is needed (and where) for other mappings. 62 * In some cases the chosen value may not be the maximum in order that 63 * we don't waste memory with kernel pages tables as we can't currently 64 * grow the kernel page tables after booting. 65 * You only need to increase these values if you find that the number of 66 * buffers is being limited due to lack of VA space. 67 */ 68 /* 69 * The range 0xf1000000 - 0xf5ffffff is available for kernel VM space 70 * Fixed mappings exist from 0xf6000000 - 0xffffffff 71 */ 72 #define KERNEL_VM_SIZE 0x05000000 73 74 /* 75 * Override the default pager_map size, there's not enough KVA. 76 */ 77 #define PAGER_MAP_SIZE (4 * 1024 * 1024) 78 79 /* 80 * Size of User Raw I/O map 81 */ 82 83 #define USRIOSIZE 300 84 85 /* XXX max. amount of KVM to be used by buffers. */ 86 #ifndef VM_MAX_KERNEL_BUF 87 #define VM_MAX_KERNEL_BUF \ 88 ((KERNEL_VM_SIZE) * 4 / 10) 89 #endif 90 91 /* virtual sizes (bytes) for various kernel submaps */ 92 93 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 94 95 /* 96 * max number of non-contig chunks of physical RAM you can have 97 */ 98 99 #define VM_PHYSSEG_MAX 32 100 101 /* 102 * when converting a physical address to a vm_page structure, we 103 * want to use a binary search on the chunks of physical memory 104 * to find our RAM 105 */ 106 107 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 108 109 /* 110 * this indicates that we can't add RAM to the VM system after the 111 * vm system is init'd. 112 */ 113 114 #define VM_PHYSSEG_NOADD 115 116 /* 117 * we support 2 free lists: 118 * 119 * - DEFAULT for all systems 120 * - ISADMA for the ISA DMA range on Sharks only 121 * - RPCDMA for the DMA range on RiscPC's + Kinetic cards 122 */ 123 124 #define VM_NFREELIST 2 125 #define VM_FREELIST_DEFAULT 0 126 #define VM_FREELIST_ISADMA 1 127 #define VM_FREELIST_RPCDMA 1 128 129 #endif /* _KERNEL */ 130 131 #endif /* _ARM32_VMPARAM_H_ */ 132