NetBSD/sys/arch/powerpc/include/pmap.h

111 lines
3.5 KiB
C

/* $NetBSD: pmap.h,v 1.13 1999/06/17 19:23:21 thorpej Exp $ */
/*-
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
* Copyright (C) 1995, 1996 TooLs GmbH.
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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 <machine/pte.h>
/*
* Segment registers
*/
#ifndef _LOCORE
typedef u_int sr_t;
#endif /* _LOCORE */
#define SR_TYPE 0x80000000
#define SR_SUKEY 0x40000000
#define SR_PRKEY 0x20000000
#define SR_VSID 0x00ffffff
#ifndef _LOCORE
/*
* Pmap stuff
*/
struct pmap {
sr_t pm_sr[16]; /* segments used in this pmap */
int pm_refs; /* ref count */
struct pmap_statistics pm_stats; /* pmap statistics */
};
typedef struct pmap *pmap_t;
#ifdef _KERNEL
extern struct pmap kernel_pmap_;
#define pmap_kernel() (&kernel_pmap_)
#define pmap_clear_modify(pa) (ptemodify((pa), PTE_CHG, 0))
#define pmap_clear_reference(pa) (ptemodify((pa), PTE_REF, 0))
#define pmap_is_modified(pa) (ptebits((pa), PTE_CHG))
#define pmap_is_referenced(pa) (ptebits((pa), PTE_REF))
#define pmap_unwire(pm, va)
#define pmap_phys_address(x) (x)
#define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count)
void pmap_bootstrap __P((u_int kernelstart, u_int kernelend));
paddr_t pmap_extract __P((struct pmap *, vaddr_t));
void ptemodify __P((paddr_t, u_int, u_int));
int ptebits __P((paddr_t, int));
#define PMAP_NEED_PROCWR
void pmap_procwr __P((struct proc *, vaddr_t, size_t));
/*
* Alternate mapping hooks for pool pages. Avoids thrashing the TLB.
*
* Note: This won't work if we have more memory than can be direct-mapped
* VA==PA all at once. But pmap_copy_page() and pmap_zero_page() will have
* this problem, too.
*/
#define PMAP_MAP_POOLPAGE(pa) (pa)
#define PMAP_UNMAP_POOLPAGE(pa) (pa)
static __inline paddr_t
vtophys(va)
vaddr_t va;
{
paddr_t pa;
/* XXX should check battable */
if ((pa = pmap_extract(pmap_kernel(), va)) != 0)
return pa;
return va;
}
#endif /* _KERNEL */
#endif /* _LOCORE */
#endif /* _MACHINE_PMAP_H_ */