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pmap.h (15543) pmap.h (15565)
1/*
2 * Copyright (c) 1991 Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * the Systems Programming Group of the University of Utah Computer
7 * Science Department and William Jolitz of UUNET Technologies Inc.
8 *

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37 * Derived from hp300 version by Mike Hibler, this version by William
38 * Jolitz uses a recursive map [a pde points to the page directory] to
39 * map the page tables using the pagetables themselves. This is done to
40 * reduce the impact on kernel virtual memory for lots of sparse address
41 * space, and to reduce the cost of memory to each process.
42 *
43 * from: hp300: @(#)pmap.h 7.2 (Berkeley) 12/16/90
44 * from: @(#)pmap.h 7.4 (Berkeley) 5/12/91
1/*
2 * Copyright (c) 1991 Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * the Systems Programming Group of the University of Utah Computer
7 * Science Department and William Jolitz of UUNET Technologies Inc.
8 *

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37 * Derived from hp300 version by Mike Hibler, this version by William
38 * Jolitz uses a recursive map [a pde points to the page directory] to
39 * map the page tables using the pagetables themselves. This is done to
40 * reduce the impact on kernel virtual memory for lots of sparse address
41 * space, and to reduce the cost of memory to each process.
42 *
43 * from: hp300: @(#)pmap.h 7.2 (Berkeley) 12/16/90
44 * from: @(#)pmap.h 7.4 (Berkeley) 5/12/91
45 * $Id: pmap.h,v 1.36 1996/04/30 12:02:11 phk Exp $
45 * $Id: pmap.h,v 1.37 1996/05/02 14:20:04 phk Exp $
46 */
47
48#ifndef _MACHINE_PMAP_H_
49#define _MACHINE_PMAP_H_
50
46 */
47
48#ifndef _MACHINE_PMAP_H_
49#define _MACHINE_PMAP_H_
50
51#define PG_V 0x00000001
52#define PG_RW 0x00000002
53#define PG_u 0x00000004
54#define PG_PROT 0x00000006 /* all protection bits . */
55#define PG_NC_PWT 0x00000008 /* page cache write through */
56#define PG_NC_PCD 0x00000010 /* page cache disable */
57#define PG_N 0x00000018 /* Non-cacheable */
58#define PG_U 0x00000020 /* page was accessed */
59#define PG_M 0x00000040 /* page was modified */
60#define PG_PS 0x00000080 /* page is big size */
61#define PG_G 0x00000100 /* page is global */
62#define PG_W 0x00000200 /* "Wired" pseudoflag */
63#define PG_FRAME 0xfffff000
51/*
52 * Page-directory and page-table entires follow this format, with a few
53 * of the fields not present here and there, depending on a lot of things.
54 */
55 /* ---- Intel Nomenclature ---- */
56#define PG_V 0x001 /* P Valid */
57#define PG_RW 0x002 /* R/W Read/Write */
58#define PG_U 0x004 /* U/S User/Supervisor */
59#define PG_NC_PWT 0x008 /* PWT Write through */
60#define PG_NC_PCD 0x010 /* PCD Cache disable */
61#define PG_A 0x020 /* A Accessed */
62#define PG_M 0x040 /* D Dirty */
63#define PG_PS 0x080 /* PS Page size (0=4k,1=4M) */
64#define PG_G 0x100 /* G Global */
65#define PG_AVAIL1 0x200 /* / Available for system */
66#define PG_AVAIL2 0x400 /* < programmers use */
67#define PG_AVAIL3 0x800 /* \ */
64
68
65#define PG_KR 0x00000000
66#define PG_KW 0x00000002
67
69
70/* Our various interpretations of the above */
71#define PG_W PG_AVAIL1 /* "Wired" pseudoflag */
72#define PG_FRAME (~PAGE_MASK)
73#define PG_PROT (PG_RW|PG_U) /* all protection bits . */
74#define PG_N (PG_NC_PWT|PG_NC_PCD) /* Non-cacheable */
75
68/*
69 * Page Protection Exception bits
70 */
71
72#define PGEX_P 0x01 /* Protection violation vs. not present */
73#define PGEX_W 0x02 /* during a Write cycle */
74#define PGEX_U 0x04 /* access from User mode (UPL) */
75
76/*
77 * Pte related macros
78 */
79#define VADDR(pdi, pti) ((vm_offset_t)(((pdi)<<PDRSHIFT)|((pti)<<PAGE_SHIFT)))
80
76/*
77 * Page Protection Exception bits
78 */
79
80#define PGEX_P 0x01 /* Protection violation vs. not present */
81#define PGEX_W 0x02 /* during a Write cycle */
82#define PGEX_U 0x04 /* access from User mode (UPL) */
83
84/*
85 * Pte related macros
86 */
87#define VADDR(pdi, pti) ((vm_offset_t)(((pdi)<<PDRSHIFT)|((pti)<<PAGE_SHIFT)))
88
81/*
82 * NKPDE controls the virtual space of the kernel, what ever is left, minus
83 * the alternate page table area is given to the user (NUPDE)
84 */
85/*
86 * NKPDE controls the virtual space of the kernel, what ever is left is
87 * given to the user (NUPDE)
88 */
89#ifndef NKPT
90#if 0
91#define NKPT 26 /* actual number of kernel page tables */
92#else
93#define NKPT 9 /* actual number of kernel page tables */
94#endif
95#endif
96#ifndef NKPDE

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104 * right after I fix locore.s and the magic 28K hole
105 */
106#define APTDPTDI (NPDEPG-1) /* alt ptd entry that points to APTD */
107#define KPTDI (APTDPTDI-NKPDE)/* start of kernel virtual pde's */
108#define PTDPTDI (KPTDI-1) /* ptd entry that points to ptd! */
109#define KSTKPTDI (PTDPTDI-1) /* ptd entry for u./kernel&user stack */
110#define KSTKPTEOFF (NPTEPG-UPAGES) /* pte entry for kernel stack */
111
89#ifndef NKPT
90#if 0
91#define NKPT 26 /* actual number of kernel page tables */
92#else
93#define NKPT 9 /* actual number of kernel page tables */
94#endif
95#endif
96#ifndef NKPDE

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104 * right after I fix locore.s and the magic 28K hole
105 */
106#define APTDPTDI (NPDEPG-1) /* alt ptd entry that points to APTD */
107#define KPTDI (APTDPTDI-NKPDE)/* start of kernel virtual pde's */
108#define PTDPTDI (KPTDI-1) /* ptd entry that points to ptd! */
109#define KSTKPTDI (PTDPTDI-1) /* ptd entry for u./kernel&user stack */
110#define KSTKPTEOFF (NPTEPG-UPAGES) /* pte entry for kernel stack */
111
112/*
113 * XXX doesn't really belong here I guess...
114 */
115#define ISA_HOLE_START 0xa0000
116#define ISA_HOLE_LENGTH (0x100000-ISA_HOLE_START)
117
112#ifndef LOCORE
113typedef unsigned int *pd_entry_t;
114typedef unsigned int *pt_entry_t;
115struct vm_map;
116
117#define PDESIZE sizeof(pd_entry_t) /* for assembly files */
118#define PTESIZE sizeof(pt_entry_t) /* for assembly files */
119

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146 * Function:
147 * Extract the physical page address associated
148 * kernel virtual address.
149 */
150static __inline vm_offset_t
151pmap_kextract(vm_offset_t va)
152{
153 vm_offset_t pa = *(int *)vtopte(va);
118#ifndef LOCORE
119typedef unsigned int *pd_entry_t;
120typedef unsigned int *pt_entry_t;
121struct vm_map;
122
123#define PDESIZE sizeof(pd_entry_t) /* for assembly files */
124#define PTESIZE sizeof(pt_entry_t) /* for assembly files */
125

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152 * Function:
153 * Extract the physical page address associated
154 * kernel virtual address.
155 */
156static __inline vm_offset_t
157pmap_kextract(vm_offset_t va)
158{
159 vm_offset_t pa = *(int *)vtopte(va);
154 pa = (pa & PG_FRAME) | (va & ~PG_FRAME);
160 pa = (pa & PG_FRAME) | (va & PAGE_MASK);
155 return pa;
156}
157#endif
158
159/*
160 * Pmap stuff
161 */
162

--- 59 unchanged lines hidden --- 		161 return pa;
162}
163#endif
164
165/*
166 * Pmap stuff
167 */
168

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