mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-22 11:17:19 +00:00
133 lines
4.6 KiB
C
133 lines
4.6 KiB
C
/*
|
|
* Copyright (c) 1991 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 William Jolitz of UUNET Technologies Inc.
|
|
*
|
|
* 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.
|
|
*
|
|
* Derived from hp300 version by Mike Hibler, this version by William
|
|
* Jolitz uses a recursive map [a pde points to the page directory] to
|
|
* map the page tables using the pagetables themselves. This is done to
|
|
* reduce the impact on kernel virtual memory for lots of sparse address
|
|
* space, and to reduce the cost of memory to each process.
|
|
*
|
|
* from: hp300: @(#)pmap.h 7.2 (Berkeley) 12/16/90
|
|
* from: @(#)pmap.h 7.4 (Berkeley) 5/12/91
|
|
* from: i386 pmap.h,v 1.54 1997/11/20 19:30:35 bde Exp
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _MACHINE_PMAP_H_
|
|
#define _MACHINE_PMAP_H_
|
|
|
|
#include <sys/queue.h>
|
|
#include <machine/pte.h>
|
|
|
|
#ifdef _KERNEL
|
|
|
|
#ifndef NKPT
|
|
#define NKPT 30 /* initial number of kernel page tables */
|
|
#endif
|
|
#define MAXKPT (PAGE_SIZE/sizeof(vm_offset_t))
|
|
|
|
#define vtophys(va) pmap_kextract(((vm_offset_t) (va)))
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
/*
|
|
* Pmap stuff
|
|
*/
|
|
struct pv_entry;
|
|
|
|
struct md_page {
|
|
int pv_list_count;
|
|
TAILQ_HEAD(,pv_entry) pv_list;
|
|
};
|
|
|
|
struct pmap {
|
|
TAILQ_HEAD(,pv_entry) pm_pvlist; /* list of mappings in pmap */
|
|
u_int32_t pm_rid[5]; /* base RID for pmap */
|
|
int pm_flags; /* pmap flags */
|
|
int pm_active; /* active flag */
|
|
struct pmap_statistics pm_stats; /* pmap statistics */
|
|
struct vm_page *pm_ptphint; /* pmap ptp hint */
|
|
};
|
|
|
|
#define pmap_page_is_mapped(m) (!TAILQ_EMPTY(&(m)->md.pv_list))
|
|
|
|
#define PM_FLAG_LOCKED 0x1
|
|
#define PM_FLAG_WANTED 0x2
|
|
|
|
typedef struct pmap *pmap_t;
|
|
|
|
#ifdef _KERNEL
|
|
extern struct pmap kernel_pmap_store;
|
|
#define kernel_pmap (&kernel_pmap_store)
|
|
#endif
|
|
|
|
/*
|
|
* For each vm_page_t, there is a list of all currently valid virtual
|
|
* mappings of that page. An entry is a pv_entry_t, the list is pv_table.
|
|
*/
|
|
typedef struct pv_entry {
|
|
pmap_t pv_pmap; /* pmap where mapping lies */
|
|
vm_offset_t pv_va; /* virtual address for mapping */
|
|
TAILQ_ENTRY(pv_entry) pv_list;
|
|
TAILQ_ENTRY(pv_entry) pv_plist;
|
|
} *pv_entry_t;
|
|
|
|
#ifdef _KERNEL
|
|
|
|
extern vm_offset_t avail_end;
|
|
extern vm_offset_t avail_start;
|
|
extern vm_offset_t phys_avail[];
|
|
extern vm_offset_t virtual_avail;
|
|
extern vm_offset_t virtual_end;
|
|
|
|
vm_offset_t pmap_steal_memory(vm_size_t);
|
|
void pmap_bootstrap(void);
|
|
void pmap_kenter(vm_offset_t va, vm_offset_t pa);
|
|
vm_paddr_t pmap_kextract(vm_offset_t va);
|
|
void pmap_kremove(vm_offset_t);
|
|
void pmap_setdevram(unsigned long long basea, vm_offset_t sizea);
|
|
int pmap_uses_prom_console(void);
|
|
void *pmap_mapdev(vm_offset_t, vm_size_t);
|
|
void pmap_unmapdev(vm_offset_t, vm_size_t);
|
|
unsigned *pmap_pte(pmap_t, vm_offset_t) __pure2;
|
|
void pmap_set_opt (unsigned *);
|
|
void pmap_set_opt_bsp (void);
|
|
struct pmap *pmap_switch(struct pmap *pmap);
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* !_MACHINE_PMAP_H_ */
|