/* $NetBSD: vmparam.h,v 1.23 2026/05/03 19:10:41 thorpej Exp $ */ /*- * Copyright (c) 1998 The NetBSD Foundation, Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * Machine dependent constants for Sun2 * * The Sun2 has limited total kernel virtual space (14MB) and * can not use main memory for page tables. (All active PTEs * must be installed in special translation RAM in the MMU). * Therefore, parameters that would normally configure the * size of various page tables are irrelevant. Only things * that consume portions of kernel virtual (KV) space matter, * and those things should be chosen to conserve KV space. */ #if defined(_KERNEL) && !defined(_MODULE) #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)KERNBASE) #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)KERN_END) /* * Size of phys_map, used for mapping user I/O buffer into kernel * space for physio. * * The actual limitation for physio requests will be the DVMA space, * and that is fixed by hardware design at 256K. We could make the * physio map larger than that, but it would not buy us much. */ #define VM_PHYS_SIZE (256 * 1024) /* * We definitely need a small pager map. */ #define PAGER_MAP_DEFAULT_SIZE (1 * 1024 * 1024) #endif /* _KERNEL && !_MODULE */ #include