pte.h

国产CPU－龙芯（loongson)BIOS源代码

/*	$Id: pte.h,v 1.1.1.1 2003/11/08 08:41:44 wlin Exp $ */

/*
 * Copyright (c) 2000, 2001 Opsycon AB (www.opsycon.com)
 * 
 * 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 Opsycon AB and Rtmx, Inc.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 _LOCORE

/*
 * Structure defining an tlb entry data set.
 */

struct tlb {
	int	tlb_mask;
	int	tlb_hi;
	int	tlb_lo0;
	int	tlb_lo1;
};

#endif /* _LOCORE */


#define	PT_ENTRY_NULL	((pt_entry_t *) 0)

#define PG_WIRED	0x80000000	/* SW */
#define PG_RO		0x40000000	/* SW */

#define	PG_SVPN		0xfffff000	/* Software page no mask */
#define	PG_HVPN		0xffffe000	/* Hardware page no mask */
#define	PG_ODDPG	0x00001000	/* Odd even pte entry */
#define	PG_ASID		0x000000ff	/* Address space ID */
#define	PG_G		0x00000001	/* HW */
#define	PG_V		0x00000002
#define	PG_NV		0x00000000
#define	PG_M		0x00000004
#define	PG_ATTR		0x0000003f
#define	PG_UNCACHED	0x00000010
#define	PG_CACHED	0x00000018
#define	PG_CACHEMODE	0x00000038
#define	PG_ROPAGE	(PG_V | PG_RO | PG_CACHED) /* Write protected */
#define	PG_RWPAGE	(PG_V | PG_M | PG_CACHED)  /* Not wr-prot not clean */
#define	PG_CWPAGE	(PG_V | PG_CACHED)	   /* Not wr-prot but clean */
#define	PG_IOPAGE	(PG_G | PG_V | PG_M | PG_UNCACHED)
#define	PG_FRAME	0x3fffffc0
#define PG_SHIFT	6
#define pfn_is_ext(x) ((x) & 0x3c000000)
#define vad_to_pfn(x) (((unsigned)(x) >> PG_SHIFT) & PG_FRAME)
#define vad_to_pfn64(x) (((quad_t)(x) >> PG_SHIFT) & PG_FRAME)
#define pfn_to_pad(x) (((x) & PG_FRAME) << PG_SHIFT)
#define vad_to_vpn(x) ((unsigned)(x) & PG_SVPN)
#define vpn_to_vad(x) ((x) & PG_SVPN)
/* User viritual to pte page entry */
#define uvtopte(adr) (((adr) >> PGSHIFT) & (NPTEPG -1))

#define	PG_SIZE_4K	0x00000000
#define	PG_SIZE_16K	0x00006000
#define	PG_SIZE_64K	0x0001e000
#define	PG_SIZE_256K	0x0007e000
#define	PG_SIZE_1M	0x001fe000
#define	PG_SIZE_4M	0x007fe000
#define	PG_SIZE_16M	0x01ffe000

#if defined(RM9000)
#define PG_SIZE_64M	0x07ffe000
#define PG_SIZE_256M	0x1fffe000
#endif