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      1 /*	$NetBSD: pte.h,v 1.12 2008/04/28 20:23:35 martin Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2002 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by UCHIYAMA Yasushi.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _SH3_PTE_H_
     33 #define	_SH3_PTE_H_
     34 
     35 /*
     36  * NetBSD/sh3 PTE format.
     37  *
     38  * [Hardware bit]
     39  * SH3
     40  *	  PPN   V   PR  SZ C  D  SH
     41  *	[28:10][8][6:5][4][3][2][1]
     42  *
     43  * SH4
     44  *	        V  SZ  PR  SZ C  D  SH WT
     45  *	[28:10][8][7][6:5][4][3][2][1][0]
     46  *
     47  * [Software bit]
     48  *   [31]   - PMAP_WIRED bit (not hardware wired entry)
     49  *   [11:9] - SH4 PCMCIA Assistant bit. (space attribute bit only)
     50  */
     51 
     52 /*
     53  * Hardware bits
     54  */
     55 #define	PG_PPN			0x1ffff000	/* Physical page number mask */
     56 #define	PG_V			0x00000100	/* Valid */
     57 #define	PG_PR_MASK		0x00000060	/* Page protection mask */
     58 #define	PG_PR_URW		0x00000060	/* kernel/user read/write */
     59 #define	PG_PR_URO		0x00000040	/* kernel/user read only */
     60 #define	PG_PR_KRW		0x00000020	/* kernel read/write */
     61 #define	PG_PR_KRO		0x00000000	/* kernel read only */
     62 #define	PG_4K			0x00000010	/* page size 4KB */
     63 #define	PG_C			0x00000008	/* Cacheable */
     64 #define	PG_D			0x00000004	/* Dirty */
     65 #define	PG_SH			0x00000002	/* Share status */
     66 #define	PG_WT			0x00000001	/* Write-through (SH4 only) */
     67 
     68 #define	PG_HW_BITS		0x1ffff17e	/* [28:12][8][6:1] */
     69 
     70 /*
     71  * Software bits
     72  */
     73 #define	_PG_WIRED		0x80000000
     74 
     75 /* SH4 PCMCIA MMU support bits */
     76 /* PTEA SA (Space Attribute bit) */
     77 #define	_PG_PCMCIA		0x00000e00	/* [11:9] */
     78 #define	_PG_PCMCIA_SHIFT	9
     79 #define	_PG_PCMCIA_NONE		0x00000000	/* Non PCMCIA space */
     80 #define	_PG_PCMCIA_IO		0x00000200	/* IOIS16 signal */
     81 #define	_PG_PCMCIA_IO8		0x00000400	/* 8 bit I/O  */
     82 #define	_PG_PCMCIA_IO16		0x00000600	/* 16 bit I/O  */
     83 #define	_PG_PCMCIA_MEM8		0x00000800	/* 8 bit common memory */
     84 #define	_PG_PCMCIA_MEM16	0x00000a00	/* 16 bit common memory */
     85 #define	_PG_PCMCIA_ATTR8	0x00000c00	/* 8 bit attribute */
     86 #define	_PG_PCMCIA_ATTR16	0x00000e00	/* 16 bit attribute */
     87 
     88 #ifndef _LOCORE
     89 typedef uint32_t pt_entry_t;
     90 #endif /* _LOCORE */
     91 #endif /* !_SH3_PTE_H_ */
     92