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param.h revision 1.27.4.1 
      1 /*	$NetBSD: param.h,v 1.27.4.1 2020/01/25 22:38:38 ad Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1994,1995 Mark Brinicombe.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the RiscBSD team.
     18  * 4. The name "RiscBSD" nor the name of the author may be used to
     19  *    endorse or promote products derived from this software without specific
     20  *    prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY RISCBSD ``AS IS'' AND ANY EXPRESS OR IMPLIED
     23  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     24  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     25  * IN NO EVENT SHALL RISCBSD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
     26  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     27  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     28  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  * SUCH DAMAGE.
     33  */
     34 
     35 #ifndef	_ARM_ARM32_PARAM_H_
     36 #define	_ARM_ARM32_PARAM_H_
     37 
     38 #ifdef _KERNEL_OPT
     39 # include "opt_arm32_pmap.h"
     40 #endif
     41 
     42 /*
     43  * Machine dependent constants for ARM6+ processors
     44  */
     45 /* These are defined in the Port File before it includes
     46  * this file. */
     47 
     48 #ifndef PGSHIFT
     49 #define	PGSHIFT		12		/* LOG2(NBPG) */
     50 #endif
     51 #define	NBPG		(1 << PGSHIFT)	/* bytes/page */
     52 #define	PGOFSET		(NBPG - 1)	/* byte offset into page */
     53 #define	NPTEPG		(NBPG / sizeof(pt_entry_t))	/* PTEs per Page */
     54 
     55 #define SSIZE		1		/* initial stack size/NBPG */
     56 #define SINCR		1		/* increment of stack/NBPG */
     57 #define USPACE		8192		/* total size of u-area */
     58 #define UPAGES		(USPACE / NBPG)	/* pages of u-area */
     59 
     60 #ifndef MSGBUFSIZE
     61 #define MSGBUFSIZE	16384	 	/* default message buffer size */
     62 #endif
     63 
     64 /*
     65  * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
     66  * logical pages.
     67  */
     68 #define	NKMEMPAGES_MIN_DEFAULT	((8 * 1024 * 1024) >> PAGE_SHIFT)
     69 #define	NKMEMPAGES_MAX_DEFAULT	((128 * 1024 * 1024) >> PAGE_SHIFT)
     70 
     71 /* Constants used to divide the USPACE area */
     72 
     73 /*
     74  * The USPACE area contains :
     75  * 1. the pcb structure for the process
     76  * 2. the kernel (svc) stack
     77  *
     78  * The layout of the area looks like this
     79  *
     80  * | uarea | kernel stack |
     81  *
     82  * The size of the uarea is known.
     83  * The kernel stack should be at least 4K is size.
     84  *
     85  * The stack top addresses are used to set the stack pointers. The stack bottom
     86  * addresses at the addresses monitored by the diagnostic code for stack overflows
     87  *
     88  */
     89 
     90 #define USPACE_SVC_STACK_TOP		(USPACE)
     91 #define USPACE_SVC_STACK_BOTTOM		(sizeof(struct pcb))
     92 
     93 #define arm_btop(x)			((unsigned)(x) >> PGSHIFT)
     94 #define arm_ptob(x)			((unsigned)(x) << PGSHIFT)
     95 #define arm_trunc_page(x)		((unsigned)(x) & ~PGOFSET)
     96 
     97 #ifdef _KERNEL
     98 #ifndef _LOCORE
     99 #ifndef __HIDE_DELAY
    100 void	delay(unsigned);
    101 #define DELAY(x)	delay(x)
    102 #endif
    103 #endif
    104 #endif
    105 
    106 #include <arm/param.h>
    107 
    108 #endif	/* _ARM_ARM32_PARAM_H_ */
    109