1 /* $NetBSD: vmparam.h,v 1.7 2001/11/23 18:16:11 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_SPACE_START are constant across all processes 50 */ 51 #define KERNEL_SPACE_START 0xf0000000 52 53 /* Various constants used by the MD code*/ 54 #define KERNEL_BASE 0xf0000000 55 #define KERNEL_TEXT_BASE KERNEL_BASE 56 #define ALT_PAGE_TBLS_BASE 0xf0c00000 57 #define KERNEL_VM_BASE 0xf1000000 58 /* 59 * The Kernel VM Size varies depending on the machine depending on how 60 * much space is needed (and where) for other mappings. 61 * In some cases the chosen value may not be the maximum in order that 62 * we don't waste memory with kernel pages tables as we can't currently 63 * grow the kernel page tables after booting. 64 * You only need to increase these values if you find that the number of 65 * buffers is being limited due to lack of VA space. 66 */ 67 68 /* 69 * The range 0xf1000000 - 0xfcffffff is available for kernel VM space 70 * Footbridge registers and I/O mappings occupy 0xfd000000 - 0xffffffff 71 */ 72 #define KERNEL_VM_SIZE 0x07000000 73 #define PROCESS_PAGE_TBLS_BASE PAGE_TABLE_SPACE_START 74 75 /* 76 * Override the default pager_map size, there's not enough KVA. 77 */ 78 #define PAGER_MAP_SIZE (4 * 1024 * 1024) 79 80 /* 81 * Size of User Raw I/O map 82 */ 83 84 #define USRIOSIZE 300 85 86 /* XXX max. amount of KVM to be used by buffers. */ 87 #ifndef VM_MAX_KERNEL_BUF 88 #define VM_MAX_KERNEL_BUF \ 89 ((VM_MAXKERN_ADDRESS - KERNEL_VM_BASE) * 4 / 10) 90 #endif 91 92 /* virtual sizes (bytes) for various kernel submaps */ 93 94 #define VM_PHYS_SIZE (USRIOSIZE*NBPG) 95 96 /* 97 * max number of non-contig chunks of physical RAM you can have 98 */ 99 100 #define VM_PHYSSEG_MAX 32 101 102 /* 103 * when converting a physical address to a vm_page structure, we 104 * want to use a binary search on the chunks of physical memory 105 * to find our RAM 106 */ 107 108 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 109 110 /* 111 * this indicates that we can't add RAM to the VM system after the 112 * vm system is init'd. 113 */ 114 115 #define VM_PHYSSEG_NOADD 116 117 /* 118 * we support 2 free lists: 119 * 120 * - DEFAULT for all systems 121 * - ISADMA for the ISA DMA range on Sharks only 122 */ 123 124 #define VM_NFREELIST 2 125 #define VM_FREELIST_DEFAULT 0 126 #define VM_FREELIST_ISADMA 1 127 128 #endif /* _KERNEL */ 129 130 #endif /* _ARM32_VMPARAM_H_ */ 131