xref: /titanic_52/usr/src/lib/libbc/inc/include/sun4/param.h (revision 5d54f3d8999eac1762fe0a8c7177d20f1f201fae)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 1989 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _sun4_param_h
#define	_sun4_param_h

#pragma ident	"%Z%%M%	%I%	%E% SMI"

/*
 * This file is intended to contain the basic
 * specific details of a given architecture.
 */

/*
 * Machine dependent constants for Sun4.
 */

/*
 * Define the VAC symbol if we could run on a machine
 * which has a Virtual Address Cache (e.g. SUN4_260)
 */
#if defined(SUN4_260) || defined(SUN4_470) || defined(SUN4_330)
#define VAC
#else
#undef VAC
#endif	/* SUN4_260 || SUN4_470 || SUN4_330 */

/*
 * Define the FPU symbol if we could run on a machine with an external
 * FPU (i.e. not integrated with the normal machine state like the vax).
 */
#define FPU

/*
 * Define the MMU_3LEVEL symbol if we could run on a machine with
 * a three level mmu.   We also assume these machines have region
 * and user cache flush operations.
 */
#ifdef SUN4_470
#define MMU_3LEVEL
#else
#undef MMU_3LEVEL
#endif	/* SUN4_470 */

/*
 * Define IOC if we could run on machines that have an I/O cache.
 */
#ifdef SUN4_470
#define IOC
#else
#undef IOC
#endif	/* SUN4_470 */

/*
 * Define BCOPY_BUF if we could run on machines that have a bcopy buffer.
 */
#ifdef SUN4_470
#define BCOPY_BUF
#else
#undef BCOPY_BUF
#endif	/* SUN4_470 */

/*
 * Define VA_HOLE for machines that have a hole in the virtual address space.
 */
#if defined(SUN4_260) || defined(SUN4_110) || defined(SUN4_330)
#define VA_HOLE
#else
#undef VA_HOLE
#endif	/* SUN4_260 || SUN4_110 || SUN4_330 */

/*
 * MMU_PAGES* describes the physical page size used by the mapping hardware.
 * PAGES* describes the logical page size used by the system.
 */

#define	MMU_PAGESIZE	0x2000		/* 8192 bytes */
#define	MMU_PAGESHIFT	13		/* log2(MMU_PAGESIZE) */
#define	MMU_PAGEOFFSET	(MMU_PAGESIZE-1)/* Mask of address bits in page */
#define	MMU_PAGEMASK	(~MMU_PAGEOFFSET)

#define	PAGESIZE	0x2000		/* All of the above, for logical */
#define	PAGESHIFT	13
#define	PAGEOFFSET	(PAGESIZE - 1)
#define	PAGEMASK	(~PAGEOFFSET)

/*
 * DATA_ALIGN is used to define the alignment of the Unix data segment.
 */
#define	DATA_ALIGN	0x2000

/*
 * Some random macros for units conversion.
 */

/*
 * MMU pages to bytes, and back (with and without rounding)
 */
#define	mmu_ptob(x)	((x) << MMU_PAGESHIFT)
#define	mmu_btop(x)	(((unsigned)(x)) >> MMU_PAGESHIFT)
#define	mmu_btopr(x)	((((unsigned)(x) + MMU_PAGEOFFSET) >> MMU_PAGESHIFT))

/*
 * pages to bytes, and back (with and without rounding)
 */
#define	ptob(x)		((x) << PAGESHIFT)
#define	btop(x)		(((unsigned)(x)) >> PAGESHIFT)
#define	btopr(x)	((((unsigned)(x) + PAGEOFFSET) >> PAGESHIFT))

/*
 * 2 versions of pages to disk blocks
 */
#define	mmu_ptod(x)	((x) << (MMU_PAGESHIFT - DEV_BSHIFT))
#define	ptod(x)		((x) << (PAGESHIFT - DEV_BSHIFT))

/*
 * Delay units are in microseconds.
 */
#define	DELAY(n)	usec_delay(n)
#define	CDELAY(c, n)	\
{ \
	register int N = n; \
	while (--N > 0) { \
		if (c) \
			break; \
		usec_delay(1); \
	} \
}

#define	UPAGES		2	/* pages of u-area, NOT including red zone */
#define	KERNSTACK	0x3000	/* size of kernel stack in u-area */

/*
 * KERNSIZE the amount of vitual address space the kernel
 * uses in all contexts.
 */
#define KERNELSIZE	(128*1024*1024)

/*
 * KERNELBASE is the virtual address which
 * the kernel text/data mapping starts in all contexts.
 */
#define	KERNELBASE	(0-KERNELSIZE)

/*
 * SYSBASE is the virtual address which
 * the kernel allocated memory mapping starts in all contexts.
 */
#define	SYSBASE		(0-(16*1024*1024))

/*
 * Msgbuf size.
 */
#define MSG_BSIZE       ((7 * 1024) - sizeof (struct msgbuf_hd))

/*
 * XXX - Macros for compatibility
 */
/* Clicks (MMU PAGES) to disk blocks */
#define	ctod(x)		mmu_ptod(x)

/* Clicks (MMU PAGES) to bytes, and back (with rounding) */
#define	ctob(x)		mmu_ptob(x)
#define	btoc(x)		mmu_btopr(x)

/*
 * XXX - Old names for some backwards compatibility
 */
#define	NBPG		MMU_PAGESIZE
#define	PGOFSET		MMU_PAGEOFFSET
#define	PGSHIFT		MMU_PAGESHIFT

#define	CLSIZE		1
#define	CLSIZELOG2	0
#define	CLBYTES		PAGESIZE
#define	CLOFSET		PAGEOFFSET
#define	CLSHIFT		PAGESHIFT
#define	clrnd(i)	(i)

#endif /* !_sun4_param_h */