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pmap.h revision 1.1 
      1 /*	$NetBSD: pmap.h,v 1.1 2003/02/03 17:10:05 matt Exp $	*/
      2 
      3 /*-
      4  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
      5  * Copyright (C) 1995, 1996 TooLs GmbH.
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by TooLs GmbH.
     19  * 4. The name of TooLs GmbH may not be used to endorse or promote products
     20  *    derived from this software without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
     23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     25  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     27  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     28  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     30  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     31  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 #ifndef	_POWERPC_OEA_PMAP_H_
     35 #define	_POWERPC_OEA_PMAP_H_
     36 
     37 #include <powerpc/oea/pte.h>
     38 
     39 /*
     40  * Segment registers
     41  */
     42 #ifndef	_LOCORE
     43 typedef u_int sr_t;
     44 #endif	/* _LOCORE */
     45 #define	SR_TYPE		0x80000000
     46 #define	SR_SUKEY	0x40000000
     47 #define	SR_PRKEY	0x20000000
     48 #define	SR_VSID		0x00ffffff
     49 
     50 #ifndef _LOCORE
     51 /*
     52  * Pmap stuff
     53  */
     54 struct pmap {
     55 	sr_t pm_sr[16];		/* segments used in this pmap */
     56 	int pm_refs;		/* ref count */
     57 	struct pmap_statistics pm_stats;	/* pmap statistics */
     58 	unsigned int pm_evictions;	/* pvo's not in page table */
     59 };
     60 
     61 typedef	struct pmap *pmap_t;
     62 
     63 #ifdef	_KERNEL
     64 extern int pmap_use_altivec;
     65 extern struct pmap kernel_pmap_;
     66 #define	pmap_kernel()	(&kernel_pmap_)
     67 
     68 #define pmap_clear_modify(pg)		(pmap_clear_bit((pg), PTE_CHG))
     69 #define	pmap_clear_reference(pg)	(pmap_clear_bit((pg), PTE_REF))
     70 #define	pmap_is_modified(pg)		(pmap_query_bit((pg), PTE_CHG))
     71 #define	pmap_is_referenced(pg)		(pmap_query_bit((pg), PTE_REF))
     72 
     73 #define	pmap_phys_address(x)		(x)
     74 
     75 #define	pmap_resident_count(pmap)	((pmap)->pm_stats.resident_count)
     76 #define	pmap_wired_count(pmap)		((pmap)->pm_stats.wired_count)
     77 
     78 static __inline void
     79 pmap_remove_all(struct pmap *pmap)
     80 {
     81 	/* Nothing. */
     82 }
     83 
     84 void pmap_bootstrap (vaddr_t kernelstart, vaddr_t kernelend);
     85 boolean_t pmap_extract (struct pmap *, vaddr_t, paddr_t *);
     86 boolean_t pmap_query_bit (struct vm_page *, int);
     87 boolean_t pmap_clear_bit (struct vm_page *, int);
     88 void pmap_real_memory (paddr_t *, psize_t *);
     89 void pmap_pinit (struct pmap *);
     90 boolean_t pmap_pageidlezero (paddr_t);
     91 void pmap_syncicache (paddr_t, psize_t);
     92 
     93 #define PMAP_NEED_PROCWR
     94 void pmap_procwr (struct proc *, vaddr_t, size_t);
     95 
     96 int pmap_pte_spill(struct pmap *, vaddr_t);
     97 
     98 #define	PMAP_NC			0x1000
     99 
    100 #define PMAP_STEAL_MEMORY
    101 #if 1
    102 /*
    103  * Alternate mapping hooks for pool pages.  Avoids thrashing the TLB.
    104  *
    105  * Note: This won't work if we have more memory than can be direct-mapped
    106  * VA==PA all at once.  But pmap_copy_page() and pmap_zero_page() will have
    107  * this problem, too.
    108  */
    109 #define	PMAP_MAP_POOLPAGE(pa)	(pa)
    110 #define	PMAP_UNMAP_POOLPAGE(pa)	(pa)
    111 #endif
    112 
    113 static __inline paddr_t vtophys (vaddr_t);
    114 
    115 static __inline paddr_t
    116 vtophys(vaddr_t va)
    117 {
    118 	paddr_t pa;
    119 
    120 	/* XXX should check battable */
    121 
    122 	if (pmap_extract(pmap_kernel(), va, &pa))
    123 		return pa;
    124 	return va;
    125 }
    126 
    127 #endif	/* _KERNEL */
    128 #endif	/* _LOCORE */
    129 
    130 #endif	/* _POWERPC_OEA_PMAP_H_ */
    131