/* $OpenBSD: pte.h,v 1.9 2008/06/26 05:42:08 ray Exp $ */ /* $NetBSD: pte.h,v 1.26 1999/04/09 00:38:11 thorpej Exp $ */ /*- * Copyright (c) 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center. * * 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. */ /* * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University. * All rights reserved. * * Author: Chris G. Demetriou * * 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 the * rights to redistribute these changes. */ #ifndef _ALPHA_PTE_H_ #define _ALPHA_PTE_H_ /* * Alpha page table entry. * Things which are in the VMS PALcode but not in the OSF PALcode * are marked with "(VMS)". * * This information derived from pp. (II) 3-3 - (II) 3-6 and * (III) 3-3 - (III) 3-5 of the "Alpha Architecture Reference Manual" by * Richard L. Sites. */ /* * Alpha Page Table Entry */ #include typedef alpha_pt_entry_t pt_entry_t; #define PT_ENTRY_NULL ((pt_entry_t *) 0) #define PTESHIFT 3 /* pte size == 1 << PTESHIFT */ #define PG_V ALPHA_PTE_VALID #define PG_NV 0 #define PG_FOR ALPHA_PTE_FAULT_ON_READ #define PG_FOW ALPHA_PTE_FAULT_ON_WRITE #define PG_FOE ALPHA_PTE_FAULT_ON_EXECUTE #define PG_ASM ALPHA_PTE_ASM #define PG_GH ALPHA_PTE_GRANULARITY #define PG_KRE ALPHA_PTE_KR #define PG_URE ALPHA_PTE_UR #define PG_KWE ALPHA_PTE_KW #define PG_UWE ALPHA_PTE_UW #define PG_PROT ALPHA_PTE_PROT #define PG_RSVD 0x000000000000cc80 /* Reserved for hardware */ #define PG_WIRED 0x0000000000010000 /* Wired. [SOFTWARE] */ #define PG_PVLIST 0x0000000000020000 /* on pv list [SOFTWARE] */ #define PG_EXEC 0x0000000000040000 /* execute perms [SOFTWARE] */ #define PG_FRAME ALPHA_PTE_RAME #define PG_SHIFT 32 #define PG_PFNUM(x) ALPHA_PTE_TO_PFN(x) /* * These are the PALcode PTE bits that we care about when checking to see * if a PTE has changed in such a way as to require a TBI. */ #define PG_PALCODE(x) ((x) & ALPHA_PTE_PALCODE) #if defined(_KERNEL) || defined(__KVM_ALPHA_PRIVATE) #define NPTEPG_SHIFT (PAGE_SHIFT - PTESHIFT) #define NPTEPG (1L << NPTEPG_SHIFT) #define PTEMASK (NPTEPG - 1) #define l3pte_index(va) \ (((vaddr_t)(va) >> PAGE_SHIFT) & PTEMASK) #define l2pte_index(va) \ (((vaddr_t)(va) >> (PAGE_SHIFT + NPTEPG_SHIFT)) & PTEMASK) #define l1pte_index(va) \ (((vaddr_t)(va) >> (PAGE_SHIFT + 2 * NPTEPG_SHIFT)) & PTEMASK) #define VPT_INDEX(va) \ (((vaddr_t)(va) >> PAGE_SHIFT) & ((1 << 3 * NPTEPG_SHIFT) - 1)) /* Space mapped by one level 1 PTE */ #define ALPHA_L1SEG_SIZE (1L << ((2 * NPTEPG_SHIFT) + PAGE_SHIFT)) /* Space mapped by one level 2 PTE */ #define ALPHA_L2SEG_SIZE (1L << (NPTEPG_SHIFT + PAGE_SHIFT)) #define alpha_trunc_l1seg(x) (((u_long)(x)) & ~(ALPHA_L1SEG_SIZE-1)) #define alpha_trunc_l2seg(x) (((u_long)(x)) & ~(ALPHA_L2SEG_SIZE-1)) #endif /* _KERNEL || __KVM_ALPHA_PRIVATE */ #ifdef _KERNEL extern pt_entry_t *kernel_lev1map; /* kernel level 1 page table */ #endif /* _KERNEL */ #endif /* ! _ALPHA_PTE_H_ */