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pte.h revision 1.3 
      1 /*	$NetBSD: pte.h,v 1.3 2003/08/24 17:52:34 chs 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_PTE_H_
     35 #define	_POWERPC_OEA_PTE_H_
     36 
     37 #include <sys/queue.h>
     38 
     39 /*
     40  * Page Table Entries
     41  */
     42 #ifndef	_LOCORE
     43 struct pte {
     44 	register_t pte_hi;
     45 	register_t pte_lo;
     46 };
     47 
     48 struct pteg {
     49 	struct pte pt[8];
     50 };
     51 #endif	/* _LOCORE */
     52 
     53 /* High word: */
     54 #define	PTE_VALID	0x80000000
     55 #define	PTE_VSID	0x7fffff80
     56 #define	PTE_VSID_SHFT	7
     57 #define	PTE_VSID_LEN	24
     58 #define	PTE_HID		0x00000040
     59 #define	PTE_API		0x0000003f
     60 #define	PTE_API_SHFT	0
     61 /* Low word: */
     62 #define	PTE_RPGN	0xfffff000
     63 #define	PTE_RPGN_SHFT	12
     64 #define	PTE_REF		0x00000100
     65 #define	PTE_CHG		0x00000080
     66 #define	PTE_W		0x00000040	/* 1 = write-through, 0 = write-back */
     67 #define	PTE_I		0x00000020	/* cache inhibit */
     68 #define	PTE_M		0x00000010	/* memory coherency enable */
     69 #define	PTE_G		0x00000008	/* guarded region (not on 601) */
     70 #define	PTE_WIMG	(PTE_W|PTE_I|PTE_M|PTE_G)
     71 #define	PTE_IG		(PTE_I|PTE_G)
     72 #define	PTE_PP		0x00000003
     73 #define	PTE_SO		0x00000000	/* Super. Only       (U: XX, S: RW) */
     74 #define	PTE_SW		0x00000001	/* Super. Write-Only (U: RO, S: RW) */
     75 #define	PTE_BW		0x00000002	/* Supervisor        (U: RW, S: RW) */
     76 #define	PTE_BR		0x00000003	/* Both Read Only    (U: RO, S: RO) */
     77 #define	PTE_RW		PTE_BW
     78 #define	PTE_RO		PTE_BR
     79 
     80 #define	PTE_EXEC	0x00000200	/* pseudo bit; page is exec */
     81 
     82 /*
     83  * Extract bits from address
     84  */
     85 #define	ADDR_SR_SHFT	28
     86 #define	ADDR_PIDX	0x0ffff000
     87 #define	ADDR_PIDX_SHFT	12
     88 #define	ADDR_API_SHFT	22
     89 #define	ADDR_POFF	0x00000fff
     90 #define	ADDR_SEG_WIDTH	4
     91 
     92 /*
     93  * Segment registers
     94  */
     95 #define SR_KEY_LEN	4		/* key bit width */
     96 #define	SR_TYPE		0x80000000	/* T=0 selects memory format */
     97 #define	SR_SUKEY	0x40000000	/* Supervisor protection key */
     98 #define	SR_PRKEY	0x20000000	/* User protection key */
     99 #define	SR_NOEXEC	0x10000000	/* No-execute protection bit */
    100 #define	SR_VSID		0x00ffffff	/* Virtual segment ID */
    101 
    102 #endif	/* _POWERPC_OEA_PTE_H_ */
    103