/* $Id: pte.h,v 1.1.1.1 1998/03/09 05:43:16 jb Exp $ */ /* From: NetBSD: pte.h,v 1.10 1997/09/02 19:07:22 thorpej Exp */ /* * 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. */ /* * 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 fpr hardware */ #define PG_WIRED 0x0000000000010000 /* Wired. [SOFTWARE] */ #define PG_FRAME ALPHA_PTE_RAME #define PG_SHIFT 32 #define PG_PFNUM(x) ALPHA_PTE_TO_PFN(x) #if 0 /* XXX NOT HERE */ #define K0SEG_BEGIN 0xfffffc0000000000 /* unmapped, cached */ #define K0SEG_END 0xfffffe0000000000 #define PHYS_UNCACHED 0x0000000040000000 #endif #ifndef _LOCORE #if 0 /* XXX NOT HERE */ #define k0segtophys(x) ((vm_offset_t)(x) & 0x00000003ffffffff) #define phystok0seg(x) ((vm_offset_t)(x) | K0SEG_BEGIN) #define phystouncached(x) ((vm_offset_t)(x) | PHYS_UNCACHED) #define uncachedtophys(x) ((vm_offset_t)(x) & ~PHYS_UNCACHED) #endif #define PTEMASK (NPTEPG - 1) #define vatopte(va) (((va) >> PGSHIFT) & PTEMASK) #define vatoste(va) (((va) >> SEGSHIFT) & PTEMASK) #define kvtol1pte(va) \ (((vm_offset_t)(va) >> (PGSHIFT + 2*(PGSHIFT-PTESHIFT))) & PTEMASK) #define vatopa(va) \ ((PG_PFNUM(*kvtopte(va)) << PGSHIFT) | ((vm_offset_t)(va) & PGOFSET)) #define ALPHA_STSIZE ((u_long)PAGE_SIZE) /* 8k */ #define ALPHA_MAX_PTSIZE ((u_long)(NPTEPG * NBPG)) /* 8M */ #ifdef _KERNEL /* * Kernel virtual address to Sysmap entry and visa versa. */ #define kvtopte(va) \ (Sysmap + (((vm_offset_t)(va) - VM_MIN_KERNEL_ADDRESS) >> PGSHIFT)) #define ptetokv(pte) \ ((((pt_entry_t *)(pte) - Sysmap) << PGSHIFT) + VM_MIN_KERNEL_ADDRESS) extern pt_entry_t *Lev1map; /* Alpha Level One page table */ extern pt_entry_t *Sysmap; /* kernel pte table */ extern vm_size_t Sysmapsize; /* number of pte's in Sysmap */ #endif #endif