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/* $OpenBSD: pte.h,v 1.3 2005/08/07 07:29:44 miod Exp $ */
/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department and Ralph Campbell.
*
* 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.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* from: Utah Hdr: pte.h 1.11 89/09/03
* from: @(#)pte.h 8.1 (Berkeley) 6/10/93
*/
/*
* R4000 hardware page table entry
*/
#ifndef _LOCORE
/*
* Structure defining an tlb entry data set.
*/
struct tlb_entry {
u_int64_t tlb_mask;
u_int64_t tlb_hi;
u_int64_t tlb_lo0;
u_int64_t tlb_lo1;
};
typedef union pt_entry {
unsigned int pt_entry; /* for copying, etc. */
unsigned int pt_pte; /* XXX void */
} pt_entry_t; /* Mips page table entry */
#endif /* _LOCORE */
#define PT_ENTRY_NULL ((pt_entry_t *) 0)
#define PG_RO 0x40000000 /* SW */
#define PG_SVPN 0xfffff000 /* Software page no mask */
#define PG_HVPN 0xffffe000 /* Hardware page no mask */
#define PG_ODDPG 0x00001000 /* Odd even pte entry */
#define PG_ASID 0x000000ff /* Address space ID */
#define PG_G 0x00000001 /* HW */
#define PG_V 0x00000002
#define PG_NV 0x00000000
#define PG_M 0x00000004
#define PG_ATTR 0x0000003f
#define PG_UNCACHED 0x00000010
#define PG_CACHED_NC 0x00000018 /* Cached, non coherent */
#define PG_CACHED_CE 0x00000020 /* Cached, coherent exclusive */
#define PG_CACHED_CEW 0x00000028 /* Cached, coherent exclusive write */
#define PG_CACHEMODE 0x00000038
#ifdef TGT_COHERENT
#define PG_CACHED PG_CACHED_CE
#else
#define PG_CACHED PG_CACHED_NC
#endif
#define PG_ROPAGE (PG_V | PG_RO | PG_CACHED) /* Write protected */
#define PG_RWPAGE (PG_V | PG_M | PG_CACHED) /* Not w-prot not clean */
#define PG_CWPAGE (PG_V | PG_CACHED) /* Not w-prot but clean */
#define PG_IOPAGE (PG_G | PG_V | PG_M | PG_UNCACHED)
#define PG_FRAME 0x3fffffc0
#define PG_SHIFT 6
#define pfn_is_ext(x) ((x) & 0x3c000000)
#define vad_to_pfn(x) (((unsigned)(x) >> PG_SHIFT) & PG_FRAME)
#define vad_to_pfn64(x) (((quad_t)(x) >> PG_SHIFT) & PG_FRAME)
#define vad_to_vpn(x) ((int)((unsigned)(x) & PG_SVPN))
#define vpn_to_vad(x) ((int)((x) & PG_SVPN))
/* User virtual to pte page entry */
#define uvtopte(adr) (((adr) >> PGSHIFT) & (NPTEPG -1))
#define PG_SIZE_4K 0x00000000
#define PG_SIZE_16K 0x00006000
#define PG_SIZE_64K 0x0001e000
#define PG_SIZE_256K 0x0007e000
#define PG_SIZE_1M 0x001fe000
#define PG_SIZE_4M 0x007fe000
#define PG_SIZE_16M 0x01ffe000
#if defined(_KERNEL) && !defined(_LOCORE)
static __inline vaddr_t
pfn_to_pad(unsigned int pte)
{
vaddr_t pa;
pa = (long)(int)(((pte & PG_FRAME) << PG_SHIFT));
return pa;
}
/*
* Kernel virtual address to page table entry and visa versa.
*/
#define kvtopte(va) \
(Sysmap + (((vaddr_t)(va) - VM_MIN_KERNEL_ADDRESS) >> PGSHIFT))
#define ptetokv(pte) \
((((pt_entry_t *)(pte) - Sysmap) << PGSHIFT) + VM_MIN_KERNEL_ADDRESS)
extern pt_entry_t *Sysmap; /* kernel pte table */
extern u_int Sysmapsize; /* number of pte's in Sysmap */
#endif
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