1 /* $NetBSD: vmparam.h,v 1.2 2014/03/18 18:20:41 riastradh Exp $ */ 2 /*- 3 * Copyright (c) 2013 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Matt Thomas of 3am Software Foundry. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef _EVBCF_VMPARAM_H_ 32 #define _EVBCF_VMPARAM_H_ 33 34 /* 35 * Machine dependent VM constants for EVBCF (Coldfire) 36 */ 37 38 /* 39 * We use 4K pages on coldfire. Override the PAGE_* definitions 40 * to be compile-time constants. 41 */ 42 #define PAGE_SHIFT PGSHIFT 43 #define PAGE_SIZE (1 << PAGE_SHIFT) 44 #define PAGE_MASK (PAGE_SIZE - 1) 45 46 /* 47 * USRSTACK is the top (end) of the user stack. 48 */ 49 #define USRSTACK VM_MAXUSER_ADDRESS /* Start of user stack */ 50 51 /* 52 * Virtual memory related constants, all in bytes 53 */ 54 #ifndef MAXTSIZ 55 #define MAXTSIZ (16*1024*1024) /* max text size */ 56 #endif 57 #ifndef DFLDSIZ 58 #define DFLDSIZ (64*1024*1024) /* initial data size limit */ 59 #endif 60 #ifndef MAXDSIZ 61 #define MAXDSIZ (128*1024*1024) /* max data size */ 62 #endif 63 #ifndef DFLSSIZ 64 #define DFLSSIZ (512*1024) /* initial stack size limit */ 65 #endif 66 #ifndef MAXSSIZ 67 #define MAXSSIZ (16*1024*1024) /* max stack size */ 68 #endif 69 70 /* 71 * PTEs for mapping user space into the kernel for phyio operations. 72 * One page is enough to handle 4MB of simultaneous raw IO operations. 73 */ 74 #ifndef USRIOSIZE 75 #define USRIOSIZE (1 * NPTEPG) /* 4MB */ 76 #endif 77 78 /* user/kernel map constants */ 79 #define VM_MIN_ADDRESS ((vaddr_t)0) 80 #define VM_MAXUSER_ADDRESS ((vaddr_t)0xBFF00000) 81 #define VM_MAX_ADDRESS ((vaddr_t)0xFFF00000) 82 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0xC0000000) 83 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)-PAGE_SIZE) 84 85 /* virtual sizes (bytes) for various kernel submaps */ 86 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 87 88 /* 89 * Constants which control the way the VM system deals with memory segments. 90 * The evbcf port has one physical memory segment. 91 */ 92 #define VM_PHYSSEG_MAX 1 93 #define VM_PHYSSEG_STRAT VM_PSTRAT_RANDOM 94 95 #define VM_NFREELIST 1 96 #define VM_FREELIST_DEFAULT 0 97 98 #endif /* _EVBCF_VMPARAM_H_ */ 99