5501d40bb9
are machine dependent because they are not required to update the tlb when mappings are added or removed, and doing so is machine dependent. In addition, an implementation may require that pages mapped with pmap_kenter have a backing vm_page_t, which is not necessarily true of all physical pages, and so may choose to pass the vm_page_t to pmap_kenter instead of the physical address in order to make this requirement clear.
143 lines
4.8 KiB
C
143 lines
4.8 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))
|
|
|
|
/*
|
|
* Routine: pmap_kextract
|
|
* Function:
|
|
* Extract the physical page address associated
|
|
* kernel virtual address.
|
|
*/
|
|
#define pmap_kextract ia64_tpa
|
|
|
|
#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 pmap_resident_count(pmap) (pmap)->pm_stats.resident_count
|
|
|
|
#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 clean_eva;
|
|
extern vm_offset_t clean_sva;
|
|
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);
|
|
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_install(struct pmap *pmap);
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* !_MACHINE_PMAP_H_ */
|