1 /* $NetBSD: pte.h,v 1.24 2017/05/22 17:12:11 ragge Exp $ */
2
3 /*
4 * Copyright (c) 1994 Ludd, University of Lule}, Sweden.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #ifndef _VAX_PTE_H_
29 #define _VAX_PTE_H_
30
31 #ifndef _LOCORE
32 /*
33 * VAX page table entries
34 */
35 struct pte {
36 unsigned int pg_pfn:21; /* Page Frame Number or 0 */
37 unsigned int pg_illegal:2; /* Don't use this bits */
38 unsigned int pg_sref:1; /* Help for ref simulation */
39 unsigned int pg_w:1; /* Wired bit */
40 unsigned int pg_z:1; /* Zero DIGITAL = 0 */
41 unsigned int pg_m:1; /* Modify DIGITAL */
42 unsigned int pg_prot:4; /* reserved at zero */
43 unsigned int pg_v:1; /* valid bit */
44 };
45
46
47 typedef struct pte pt_entry_t; /* Mach page table entry */
48
49 #endif /* _LOCORE */
50
51 #define PG_V 0x80000000
52 #define PG_NV 0x00000000
53 #define PG_PROT 0x78000000
54 #define PG_RW 0x20000000
55 #define PG_KW 0x10000000
56 #define PG_KR 0x18000000
57 #define PG_URKW 0x70000000
58 #define PG_RO 0x78000000
59 #define PG_NONE 0x00000000
60 #define PG_M 0x04000000
61 #define PG_W 0x01000000
62 #define PG_SREF 0x00800000
63 #define PG_ILLEGAL 0x00600000
64 #define PG_FRAME 0x001fffff
65 #define PG_PFNUM(x) (((unsigned long)(x) & 0x3ffffe00) >> VAX_PGSHIFT)
66
67 #ifndef _LOCORE
68 extern pt_entry_t *Sysmap;
69 /*
70 * Kernel virtual address to page table entry and to physical address.
71 */
72 #endif
73
74 #ifdef __GNUC__
75 #define kvtopte(va) kvtopte0((vaddr_t) (va))
76 static inline struct pte *
kvtopte0(vaddr_t va)77 kvtopte0(vaddr_t va)
78 {
79 struct pte *pt;
80 #ifdef _RUMPKERNEL
81 __asm(
82 "extzv $9,$21,%1,%0\n\t"
83 "moval %2[%0],%0\n\t"
84 : "=r"(pt)
85 : "g"(va), "o"(*Sysmap));
86 #else
87 __asm(
88 "extzv $9,$21,%1,%0\n\t"
89 "moval *Sysmap[%0],%0\n\t"
90 : "=r"(pt)
91 : "g"(va));
92 #endif
93 return pt;
94 }
95
96 #define kvtophys(va) kvtophys0((vaddr_t) (va))
97 static inline paddr_t
kvtophys0(vaddr_t va)98 kvtophys0(vaddr_t va)
99 {
100 paddr_t pa;
101 #ifdef _RUMPKERNEL
102 __asm(
103 "extzv $9,$21,%1,%0\n\t"
104 "ashl $9,%2[%0],%0\n\t"
105 "insv %1,$0,$9,%0\n\t"
106 : "=&r"(pa)
107 : "g"(va), "o"(*Sysmap) : "cc");
108 #else
109 __asm(
110 "extzv $9,$21,%1,%0\n\t"
111 "ashl $9,*Sysmap[%0],%0\n\t"
112 "insv %1,$0,$9,%0\n\t"
113 : "=&r"(pa)
114 : "g"(va) : "cc");
115 #endif
116 return pa;
117 }
118 #else /* __GNUC__ */
119 #define kvtophys(va) \
120 (((kvtopte(va))->pg_pfn << VAX_PGSHIFT) | ((paddr_t)(va) & VAX_PGOFSET))
121 #define kvtopte(va) (&Sysmap[PG_PFNUM(va)])
122 #endif /* __GNUC__ */
123 #define uvtopte(va, pcb) \
124 (((vaddr_t)va < 0x40000000) ? \
125 &(((pcb)->P0BR)[PG_PFNUM(va)]) : \
126 &(((pcb)->P1BR)[PG_PFNUM(va)]))
127
128 #endif
129