29d439f898
which is now the "API" provided by the pmap module. pmap_kernel() remains as the syntactic sugar. Bonus cosmetics round: move all the pmap_t pointer typedefs into uvm_pmap.h. Thanks to Greg Oster for providing cpu muscle for doing test builds.
108 lines
3.8 KiB
C
108 lines
3.8 KiB
C
/* $NetBSD: pmap.h,v 1.21 2008/12/09 20:45:45 pooka Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1998 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
|
|
*/
|
|
|
|
#ifndef _MACHINE_PMAP_H
|
|
#define _MACHINE_PMAP_H
|
|
|
|
#include <sys/simplelock.h>
|
|
|
|
/*
|
|
* Physical map structures exported to the VM code.
|
|
* XXX - Does user-level code really see this struct?
|
|
*/
|
|
|
|
struct pmap {
|
|
unsigned char *pm_segmap; /* soft copy of segmap */
|
|
int pm_ctxnum; /* MMU context number */
|
|
struct simplelock pm_lock; /* lock on pmap */
|
|
int pm_refcount; /* reference count */
|
|
int pm_version;
|
|
};
|
|
|
|
#ifdef _KERNEL
|
|
/*
|
|
* We give the pmap code a chance to resolve faults by
|
|
* reloading translations that it was forced to unload.
|
|
* This function does that, and calls vm_fault if it
|
|
* could not resolve the fault by reloading the MMU.
|
|
*/
|
|
int _pmap_fault(struct vm_map *, vaddr_t, vm_prot_t);
|
|
|
|
/* This lets us have some say in choosing VA locations. */
|
|
extern void pmap_prefer(vaddr_t, vaddr_t *);
|
|
#define PMAP_PREFER(fo, ap, sz, td) pmap_prefer((fo), (ap))
|
|
|
|
/* This needs to be a macro for kern_sysctl.c */
|
|
extern segsz_t pmap_resident_pages(pmap_t);
|
|
#define pmap_resident_count(pmap) (pmap_resident_pages(pmap))
|
|
|
|
/* This needs to be a macro for vm_mmap.c */
|
|
extern segsz_t pmap_wired_pages(pmap_t);
|
|
#define pmap_wired_count(pmap) (pmap_wired_pages(pmap))
|
|
|
|
/* We use the PA plus some low bits for device mmap. */
|
|
#define pmap_phys_address(addr) (addr)
|
|
|
|
#define pmap_update(pmap) /* nothing (yet) */
|
|
|
|
/* Map a given physical region to a virtual region */
|
|
extern vaddr_t pmap_map(vaddr_t, paddr_t, paddr_t, int);
|
|
|
|
/* Extract the PMEG for a given physical address. */
|
|
extern int _pmap_extract_pmeg(pmap_t, vaddr_t);
|
|
|
|
static __inline void
|
|
pmap_remove_all(struct pmap *pmap)
|
|
{
|
|
/* Nothing. */
|
|
}
|
|
|
|
/*
|
|
* Since PTEs also contain type bits, we have to have some way
|
|
* to tell pmap_enter `this is an IO page' or `this is not to
|
|
* be cached'. Since physical addresses are always aligned, we
|
|
* can do this with the low order bits.
|
|
*
|
|
* The values below must agree with pte.h such that:
|
|
* (PMAP_OBIO << PG_MOD_SHIFT) == PGT_OBIO
|
|
*/
|
|
#define PMAP_OBMEM 0x00
|
|
#define PMAP_OBIO 0x04 /* tells pmap_enter to use PG_OBIO */
|
|
#define PMAP_MBMEM 0x08 /* etc (sun-2/120) */
|
|
#define PMAP_MBIO 0x0C /* etc (sun-2/120) */
|
|
#define PMAP_VME0 0x08 /* etc (sun-2/50) */
|
|
#define PMAP_VME8 0x0C /* etc (sun-2/50) */
|
|
#define PMAP_NC 0x00 /* tells pmap_enter to set PG_NC */
|
|
#define PMAP_SPEC 0x0C /* mask to get all above. */
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
void pmap_procwr(struct proc *, vaddr_t, size_t);
|
|
|
|
#endif /* _MACHINE_PMAP_H */
|