1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
/* $NetBSD: mips3_pte.h,v 1.5 1996/10/13 09:54:44 jonathan 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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
struct pte {
#if BYTE_ORDER == BIG_ENDIAN
unsigned int pg_prot:2, /* SW: access control */
pg_pfnum:24, /* HW: core page frame number or 0 */
pg_attr:3, /* HW: cache attribute */
pg_m:1, /* HW: modified (dirty) bit */
pg_v:1, /* HW: valid bit */
pg_g:1; /* HW: ignore pid bit */
#endif
#if BYTE_ORDER == LITTLE_ENDIAN
unsigned int pg_g:1, /* HW: ignore pid bit */
pg_v:1, /* HW: valid bit */
pg_m:1, /* HW: modified (dirty) bit */
pg_attr:3, /* HW: cache attribute */
pg_pfnum:24, /* HW: core page frame number or 0 */
pg_prot:2; /* SW: access control */
#endif
};
/*
* Structure defining an tlb entry data set.
*/
struct tlb {
int tlb_mask;
int tlb_hi;
int tlb_lo0;
int tlb_lo1;
};
typedef union pt_entry {
unsigned int pt_entry; /* for copying, etc. */
struct pte pt_pte; /* for getting to bits by name */
} pt_entry_t; /* Mach page table entry */
#endif /* _LOCORE */
#define PT_ENTRY_NULL ((pt_entry_t *) 0)
#define PG_WIRED 0x80000000 /* SW */
#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 0x00000018
#define PG_CACHEMODE 0x00000038
#define PG_ROPAGE (PG_V | PG_RO | PG_CACHED) /* Write protected */
#define PG_RWPAGE (PG_V | PG_M | PG_CACHED) /* Not wr-prot not clean */
#define PG_CWPAGE (PG_V | PG_CACHED) /* Not wr-prot but clean */
#define PG_IOPAGE (PG_G | PG_V | PG_M | PG_UNCACHED)
#define PG_FRAME 0x3fffffc0
#define PG_SHIFT 6
/* pte accessor macros */
#define vad_to_pfn(x) (((unsigned)(x) >> PG_SHIFT) & PG_FRAME)
#define pfn_to_vad(x) (((x) & PG_FRAME) << PG_SHIFT)
#define vad_to_vpn(x) ((unsigned)(x) & PG_SVPN)
#define vpn_to_vad(x) ((x) & PG_SVPN)
#define PTE_TO_PADDR(pte) (pfn_to_vad(pte))
#define PAGE_IS_RDONLY(pte,va) \
(pmap_is_page_ro(pmap_kernel(), mips_trunc_page(va), (pte)))
/* 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
|
