1 /* $NetBSD: vmparam.h,v 1.1 2014/09/03 19:34:26 matt Exp $ */ 2 3 /*- 4 * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matt Thomas of 3am Software Foundry. 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _OR1K_VMPARAM_H_ 33 #define _OR1K_VMPARAM_H_ 34 35 /* 36 * OR1K supports 1 page size: 8KB. 37 */ 38 39 #define PAGE_SHIFT 13 40 #define PAGE_SIZE (1 << PAGE_SHIFT) 41 #define PAGE_MASK (PAGE_SIZE - 1) 42 43 #define USPACE 16384 44 #define UPAGES (USPACE >> PAGE_SHIFT) 45 46 /* 47 * USRSTACK is the top (end) of the user stack. The user VA space is a 48 * 32-bit address space starting at 0. Place the stack at its top end. 49 */ 50 #define USRSTACK ((vaddr_t) 0x80000000U - PAGE_SIZE) 51 52 #ifndef MAXTSIZ 53 #define MAXTSIZ (1UL << 26) /* 32bit max text size (64MB) */ 54 #endif 55 56 #ifndef MAXDSIZ 57 #define MAXDSIZ (1UL << 30) /* max data size (1024MB) */ 58 #endif 59 60 #ifndef MAXSSIZ 61 #define MAXSSIZ (1UL << 26) /* max stack size (64MB) */ 62 #endif 63 64 #ifndef DFLDSIZ 65 #define DFLDSIZ (1UL << 27) /* 32bit default data size (128MB) */ 66 #endif 67 68 #ifndef DFLSSIZ 69 #define DFLSSIZ (1UL << 21) /* 32bit default stack size (2MB) */ 70 #endif 71 72 #define VM_MIN_ADDRESS ((vaddr_t) 0x0) 73 #define VM_MAXUSER_ADDRESS ((vaddr_t) 0x80000000 - PAGE_SIZE) 74 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS 75 76 /* 77 * Give ourselves 64GB of mappable kernel space. That leaves the rest 78 * to be user for directly mapped (block addressable) addresses. 79 */ 80 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t) 0x80000000L) 81 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t) -PAGE_SIZE) 82 83 /* virtual sizes (bytes) for various kernel submaps */ 84 #define USRIOSIZE (PAGE_SIZE / 8) 85 #define VM_PHYS_SIZE (USRIOSIZE * PAGE_SIZE) 86 87 /* */ 88 #define VM_PHYSSEG_MAX 16 /* XXX */ 89 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 90 91 #define VM_NFREELIST 1 92 #define VM_FREELIST_DEFAULT 0 93 94 #endif /* _OR1K_VMPARAM_H_ */ 95