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- /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
- /*
- * @OSF_COPYRIGHT@
- */
- /*
- * Mach Operating System
- * Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University
- * All Rights Reserved.
- *
- * Permission to use, copy, modify and distribute this software and its
- * documentation is hereby granted, provided that both the copyright
- * notice and this permission notice appear in all copies of the
- * software, derivative works or modified versions, and any portions
- * thereof, and that both notices appear in supporting documentation.
- *
- * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
- * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
- * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
- *
- * Carnegie Mellon requests users of this software to return to
- *
- * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
- * School of Computer Science
- * Carnegie Mellon University
- * Pittsburgh PA 15213-3890
- *
- * any improvements or extensions that they make and grant Carnegie Mellon
- * the rights to redistribute these changes.
- */
-
- /*
- * Copyright (c) 1994 The University of Utah and
- * the Computer Systems Laboratory at the University of Utah (CSL).
- * All rights reserved.
- *
- * Permission to use, copy, modify and distribute this software is hereby
- * granted provided that (1) source code retains these copyright, permission,
- * and disclaimer notices, and (2) redistributions including binaries
- * reproduce the notices in supporting documentation, and (3) all advertising
- * materials mentioning features or use of this software display the following
- * acknowledgement: ``This product includes software developed by the
- * Computer Systems Laboratory at the University of Utah.''
- *
- * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
- * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
- * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
- *
- * CSL requests users of this software to return to csl-dist@cs.utah.edu any
- * improvements that they make and grant CSL redistribution rights.
- *
- */
-
- /*
- * File: vm_param.h
- * Author: Avadis Tevanian, Jr.
- * Date: 1985
- *
- * I386 machine dependent virtual memory parameters.
- * Most of the declarations are preceeded by I386_ (or i386_)
- * which is OK because only I386 specific code will be using
- * them.
- */
-
- #ifndef _MACH_I386_VM_PARAM_H_
- #define _MACH_I386_VM_PARAM_H_
-
- #define BYTE_SIZE 8 /* byte size in bits */
-
- #define I386_PGBYTES 4096 /* bytes per 80386 page */
- #define I386_PGSHIFT 12 /* number of bits to shift for pages */
-
- /*
- * Convert bytes to pages and convert pages to bytes.
- * No rounding is used.
- */
-
- #define i386_btop(x) (((unsigned)(x)) >> I386_PGSHIFT)
- #define machine_btop(x) i386_btop(x)
- #define i386_ptob(x) (((unsigned)(x)) << I386_PGSHIFT)
-
- /*
- * Round off or truncate to the nearest page. These will work
- * for either addresses or counts. (i.e. 1 byte rounds to 1 page
- * bytes.
- */
-
- #define i386_round_page(x) ((((unsigned)(x)) + I386_PGBYTES - 1) & \
- ~(I386_PGBYTES-1))
- #define i386_trunc_page(x) (((unsigned)(x)) & ~(I386_PGBYTES-1))
-
- #define VM_MIN_ADDRESS ((vm_offset_t) 0)
- #define VM_MAX_ADDRESS ((vm_offset_t) 0xc0000000U)
-
- #define LINEAR_KERNEL_ADDRESS ((vm_offset_t) 0xc0000000)
-
- #define VM_MIN_KERNEL_ADDRESS ((vm_offset_t) 0x00000000U)
- #define VM_MAX_KERNEL_ADDRESS ((vm_offset_t) 0x3fffffffU)
-
- #define VM_MIN_KERNEL_LOADED_ADDRESS ((vm_offset_t) 0x0c000000U)
- #define VM_MAX_KERNEL_LOADED_ADDRESS ((vm_offset_t) 0x1fffffffU)
-
- /* FIXME - always leave like this? */
- #define INTSTACK_SIZE (I386_PGBYTES*4)
- #define KERNEL_STACK_SIZE (I386_PGBYTES*4)
-
- #if 0 /* FIXME */
-
- #include <norma_vm.h>
- #include <task_swapper.h>
- #include <thread_swapper.h>
-
- #if defined(AT386)
- #include <i386/cpuid.h>
- #endif
-
- #if !NORMA_VM
- #if !TASK_SWAPPER && !THREAD_SWAPPER
- #define KERNEL_STACK_SIZE (I386_PGBYTES/2)
- #else
- /* stack needs to be a multiple of page size to get unwired when swapped */
- #define KERNEL_STACK_SIZE (I386_PGBYTES)
- #endif /* TASK || THREAD SWAPPER */
- #define INTSTACK_SIZE (I386_PGBYTES) /* interrupt stack size */
- #else /* NORMA_VM */
- #define KERNEL_STACK_SIZE (I386_PGBYTES*2)
- #define INTSTACK_SIZE (I386_PGBYTES*2) /* interrupt stack size */
- #endif /* NORMA_VM */
- #endif /* MACH_KERNEL */
-
- /*
- * Conversion between 80386 pages and VM pages
- */
-
- #define trunc_i386_to_vm(p) (atop(trunc_page(i386_ptob(p))))
- #define round_i386_to_vm(p) (atop(round_page(i386_ptob(p))))
- #define vm_to_i386(p) (i386_btop(ptoa(p)))
-
- /*
- * Physical memory is mapped 1-1 with virtual memory starting
- * at VM_MIN_KERNEL_ADDRESS.
- */
- #define phystokv(a) ((vm_offset_t)(a) + VM_MIN_KERNEL_ADDRESS)
-
- /*
- * For 386 only, ensure that pages are installed in the
- * kernel_pmap with VM_PROT_WRITE enabled. This avoids
- * code in pmap_enter that disallows a read-only mapping
- * in the kernel's pmap. (See ri-osc CR1387.)
- *
- * An entry in kernel_pmap is made only by the kernel or
- * a collocated server -- by definition (;-)), the requester
- * is trusted code. If it asked for read-only access,
- * it won't attempt a write. We don't have to enforce the
- * restriction. (Naturally, this assumes that any collocated
- * server will _not_ depend on trapping write accesses to pages
- * mapped read-only; this cannot be made to work in the current
- * i386-inspired pmap model.)
- */
-
- /*#if defined(AT386)
-
- #define PMAP_ENTER_386_CHECK \
- if (cpuid_family == CPUID_FAMILY_386)
-
- #else -- FIXME? We're only running on Pentiums or better */
-
- #define PMAP_ENTER_386_CHECK
-
- /*#endif*/
-
- #define PMAP_ENTER(pmap, virtual_address, page, protection, wired) \
- MACRO_BEGIN \
- vm_prot_t __prot__ = \
- (protection) & ~(page)->page_lock; \
- \
- PMAP_ENTER_386_CHECK \
- if ((pmap) == kernel_pmap) \
- __prot__ |= VM_PROT_WRITE; \
- pmap_enter( \
- (pmap), \
- (virtual_address), \
- (page)->phys_addr, \
- __prot__, \
- (wired) \
- ); \
- MACRO_END
-
- #endif /* _MACH_I386_VM_PARAM_H_ */
-