pmap.h (6c5e9bbdf5bb93639ae4899ddef635fe2ecbdd49) pmap.h (267173e72dc9f967f9d2a8f3bd1e88aae0a417bb)
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 1.31 1995/12/17 07:39:05 bde Exp $
45 * $Id: pmap.h,v 1.32 1996/01/30 22:54:48 mpp Exp $
46 */
47
48#ifndef _MACHINE_PMAP_H_
49#define _MACHINE_PMAP_H_
50
51#include <machine/pte.h>
52
53typedef unsigned int *pd_entry_t;

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154
155typedef struct pmap *pmap_t;
156
157#ifdef KERNEL
158extern pmap_t kernel_pmap;
159#endif
160
161/*
46 */
47
48#ifndef _MACHINE_PMAP_H_
49#define _MACHINE_PMAP_H_
50
51#include <machine/pte.h>
52
53typedef unsigned int *pd_entry_t;

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154
155typedef struct pmap *pmap_t;
156
157#ifdef KERNEL
158extern pmap_t kernel_pmap;
159#endif
160
161/*
162 * Macros for speed
163 */
164#define PMAP_ACTIVATE(pmapp, pcbp) \
165 if ((pmapp) != NULL /*&& (pmapp)->pm_pdchanged */) { \
166 (pcbp)->pcb_cr3 = \
167 pmap_extract(kernel_pmap, (vm_offset_t)(pmapp)->pm_pdir); \
168 if ((pmapp) == &curproc->p_vmspace->vm_pmap) \
169 load_cr3((pcbp)->pcb_cr3); \
170 (pmapp)->pm_pdchanged = FALSE; \
171 }
172
173#define PMAP_DEACTIVATE(pmapp, pcbp)
174
175/*
176 * For each vm_page_t, there is a list of all currently valid virtual
177 * mappings of that page. An entry is a pv_entry_t, the list is pv_table.
178 */
179typedef struct pv_entry {
180 struct pv_entry *pv_next; /* next pv_entry */
181 pmap_t pv_pmap; /* pmap where mapping lies */
182 vm_offset_t pv_va; /* virtual address for mapping */
183} *pv_entry_t;

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200
201#define pa_index(pa) atop(pa - vm_first_phys)
202#define pa_to_pvh(pa) (&pv_table[pa_index(pa)])
203
204#define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count)
205
206struct pcb;
207
162 * For each vm_page_t, there is a list of all currently valid virtual
163 * mappings of that page. An entry is a pv_entry_t, the list is pv_table.
164 */
165typedef struct pv_entry {
166 struct pv_entry *pv_next; /* next pv_entry */
167 pmap_t pv_pmap; /* pmap where mapping lies */
168 vm_offset_t pv_va; /* virtual address for mapping */
169} *pv_entry_t;

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186
187#define pa_index(pa) atop(pa - vm_first_phys)
188#define pa_to_pvh(pa) (&pv_table[pa_index(pa)])
189
190#define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count)
191
192struct pcb;
193
208void pmap_activate __P((pmap_t, struct pcb *));
209void pmap_bootstrap __P(( vm_offset_t, vm_offset_t));
210pmap_t pmap_kernel __P((void));
211void *pmap_mapdev __P((vm_offset_t, vm_size_t));
212pt_entry_t * __pure pmap_pte __P((pmap_t, vm_offset_t)) __pure2;
213void pmap_unuse_pt __P((pmap_t, vm_offset_t));
214void pmap_use_pt __P((pmap_t, vm_offset_t));
215
216#endif /* KERNEL */
217
218#endif /* !_MACHINE_PMAP_H_ */
194void pmap_bootstrap __P(( vm_offset_t, vm_offset_t));
195pmap_t pmap_kernel __P((void));
196void *pmap_mapdev __P((vm_offset_t, vm_size_t));
197pt_entry_t * __pure pmap_pte __P((pmap_t, vm_offset_t)) __pure2;
198void pmap_unuse_pt __P((pmap_t, vm_offset_t));
199void pmap_use_pt __P((pmap_t, vm_offset_t));
200
201#endif /* KERNEL */
202
203#endif /* !_MACHINE_PMAP_H_ */