Annotation of sys/arch/alpha/include/pte.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: pte.h,v 1.8 2000/11/08 21:27:23 ericj Exp $ */
! 2: /* $NetBSD: pte.h,v 1.26 1999/04/09 00:38:11 thorpej Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1998 The NetBSD Foundation, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * This code is derived from software contributed to The NetBSD Foundation
! 9: * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
! 10: * NASA Ames Research Center.
! 11: *
! 12: * Redistribution and use in source and binary forms, with or without
! 13: * modification, are permitted provided that the following conditions
! 14: * are met:
! 15: * 1. Redistributions of source code must retain the above copyright
! 16: * notice, this list of conditions and the following disclaimer.
! 17: * 2. Redistributions in binary form must reproduce the above copyright
! 18: * notice, this list of conditions and the following disclaimer in the
! 19: * documentation and/or other materials provided with the distribution.
! 20: * 3. All advertising materials mentioning features or use of this software
! 21: * must display the following acknowledgement:
! 22: * This product includes software developed by the NetBSD
! 23: * Foundation, Inc. and its contributors.
! 24: * 4. Neither the name of The NetBSD Foundation nor the names of its
! 25: * contributors may be used to endorse or promote products derived
! 26: * from this software without specific prior written permission.
! 27: *
! 28: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 29: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 30: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 31: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 32: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 33: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 34: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 35: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 36: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 37: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 38: * POSSIBILITY OF SUCH DAMAGE.
! 39: */
! 40:
! 41: /*
! 42: * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
! 43: * All rights reserved.
! 44: *
! 45: * Author: Chris G. Demetriou
! 46: *
! 47: * Permission to use, copy, modify and distribute this software and
! 48: * its documentation is hereby granted, provided that both the copyright
! 49: * notice and this permission notice appear in all copies of the
! 50: * software, derivative works or modified versions, and any portions
! 51: * thereof, and that both notices appear in supporting documentation.
! 52: *
! 53: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
! 54: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
! 55: * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
! 56: *
! 57: * Carnegie Mellon requests users of this software to return to
! 58: *
! 59: * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
! 60: * School of Computer Science
! 61: * Carnegie Mellon University
! 62: * Pittsburgh PA 15213-3890
! 63: *
! 64: * any improvements or extensions that they make and grant Carnegie the
! 65: * rights to redistribute these changes.
! 66: */
! 67:
! 68: #ifndef _ALPHA_PTE_H_
! 69: #define _ALPHA_PTE_H_
! 70:
! 71: /*
! 72: * Alpha page table entry.
! 73: * Things which are in the VMS PALcode but not in the OSF PALcode
! 74: * are marked with "(VMS)".
! 75: *
! 76: * This information derived from pp. (II) 3-3 - (II) 3-6 and
! 77: * (III) 3-3 - (III) 3-5 of the "Alpha Architecture Reference Manual" by
! 78: * Richard L. Sites.
! 79: */
! 80:
! 81: /*
! 82: * Alpha Page Table Entry
! 83: */
! 84:
! 85: #include <machine/alpha_cpu.h>
! 86:
! 87: typedef alpha_pt_entry_t pt_entry_t;
! 88:
! 89: #define PT_ENTRY_NULL ((pt_entry_t *) 0)
! 90: #define PTESHIFT 3 /* pte size == 1 << PTESHIFT */
! 91:
! 92: #define PG_V ALPHA_PTE_VALID
! 93: #define PG_NV 0
! 94: #define PG_FOR ALPHA_PTE_FAULT_ON_READ
! 95: #define PG_FOW ALPHA_PTE_FAULT_ON_WRITE
! 96: #define PG_FOE ALPHA_PTE_FAULT_ON_EXECUTE
! 97: #define PG_ASM ALPHA_PTE_ASM
! 98: #define PG_GH ALPHA_PTE_GRANULARITY
! 99: #define PG_KRE ALPHA_PTE_KR
! 100: #define PG_URE ALPHA_PTE_UR
! 101: #define PG_KWE ALPHA_PTE_KW
! 102: #define PG_UWE ALPHA_PTE_UW
! 103: #define PG_PROT ALPHA_PTE_PROT
! 104: #define PG_RSVD 0x000000000000cc80 /* Reserved for hardware */
! 105: #define PG_WIRED 0x0000000000010000 /* Wired. [SOFTWARE] */
! 106: #define PG_PVLIST 0x0000000000020000 /* on pv list [SOFTWARE] */
! 107: #define PG_EXEC 0x0000000000040000 /* execute perms [SOFTWARE] */
! 108: #define PG_FRAME ALPHA_PTE_RAME
! 109: #define PG_SHIFT 32
! 110: #define PG_PFNUM(x) ALPHA_PTE_TO_PFN(x)
! 111:
! 112: /*
! 113: * These are the PALcode PTE bits that we care about when checking to see
! 114: * if a PTE has changed in such a way as to require a TBI.
! 115: */
! 116: #define PG_PALCODE(x) ((x) & ALPHA_PTE_PALCODE)
! 117:
! 118: #if defined(_KERNEL) || defined(__KVM_ALPHA_PRIVATE)
! 119: #define NPTEPG_SHIFT (PAGE_SHIFT - PTESHIFT)
! 120: #define NPTEPG (1L << NPTEPG_SHIFT)
! 121:
! 122: #define PTEMASK (NPTEPG - 1)
! 123:
! 124: #define l3pte_index(va) \
! 125: (((vaddr_t)(va) >> PAGE_SHIFT) & PTEMASK)
! 126:
! 127: #define l2pte_index(va) \
! 128: (((vaddr_t)(va) >> (PAGE_SHIFT + NPTEPG_SHIFT)) & PTEMASK)
! 129:
! 130: #define l1pte_index(va) \
! 131: (((vaddr_t)(va) >> (PAGE_SHIFT + 2 * NPTEPG_SHIFT)) & PTEMASK)
! 132:
! 133: #define VPT_INDEX(va) \
! 134: (((vaddr_t)(va) >> PAGE_SHIFT) & ((1 << 3 * NPTEPG_SHIFT) - 1))
! 135:
! 136: /* Space mapped by one level 1 PTE */
! 137: #define ALPHA_L1SEG_SIZE (1L << ((2 * NPTEPG_SHIFT) + PAGE_SHIFT))
! 138:
! 139: /* Space mapped by one level 2 PTE */
! 140: #define ALPHA_L2SEG_SIZE (1L << (NPTEPG_SHIFT + PAGE_SHIFT))
! 141:
! 142: #define alpha_trunc_l1seg(x) (((u_long)(x)) & ~(ALPHA_L1SEG_SIZE-1))
! 143: #define alpha_trunc_l2seg(x) (((u_long)(x)) & ~(ALPHA_L2SEG_SIZE-1))
! 144: #endif /* _KERNEL || __KVM_ALPHA_PRIVATE */
! 145:
! 146: #ifdef _KERNEL
! 147: extern pt_entry_t *kernel_lev1map; /* kernel level 1 page table */
! 148: #endif /* _KERNEL */
! 149:
! 150: #endif /* ! _ALPHA_PTE_H_ */
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