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param.h revision 1.26 
      1 /*	$NetBSD: param.h,v 1.26 2019/02/04 13:06:39 skrll 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 #if defined(_ARM_ARCH_6)
     50 #define	PGSHIFT		13		/* LOG2(NBPG) */
     51 #else
     52 #define	PGSHIFT		12		/* LOG2(NBPG) */
     53 #endif
     54 #endif
     55 #define	NBPG		(1 << PGSHIFT)	/* bytes/page */
     56 #define	PGOFSET		(NBPG-1)	/* byte offset into page */
     57 #define	NPTEPG		(NBPG/(sizeof (pt_entry_t)))
     58 
     59 
     60 #define SSIZE		1		/* initial stack size/NBPG */
     61 #define SINCR		1		/* increment of stack/NBPG */
     62 #define USPACE		8192		/* total size of u-area */
     63 #define UPAGES		(USPACE / NBPG)	/* pages of u-area */
     64 
     65 #ifndef MSGBUFSIZE
     66 #define MSGBUFSIZE	16384	 	/* default message buffer size */
     67 #endif
     68 
     69 /*
     70  * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
     71  * logical pages.
     72  */
     73 #define	NKMEMPAGES_MIN_DEFAULT	((8 * 1024 * 1024) >> PAGE_SHIFT)
     74 #define	NKMEMPAGES_MAX_DEFAULT	((128 * 1024 * 1024) >> PAGE_SHIFT)
     75 
     76 /* Constants used to divide the USPACE area */
     77 
     78 /*
     79  * The USPACE area contains :
     80  * 1. the pcb structure for the process
     81  * 2. the kernel (svc) stack
     82  *
     83  * The layout of the area looks like this
     84  *
     85  * | uarea | kernel stack |
     86  *
     87  * The size of the uarea is known.
     88  * The kernel stack should be at least 4K is size.
     89  *
     90  * The stack top addresses are used to set the stack pointers. The stack bottom
     91  * addresses at the addresses monitored by the diagnostic code for stack overflows
     92  *
     93  */
     94 
     95 #define USPACE_SVC_STACK_TOP		(USPACE)
     96 #define USPACE_SVC_STACK_BOTTOM		(sizeof(struct pcb))
     97 
     98 #define arm_btop(x)			((unsigned)(x) >> PGSHIFT)
     99 #define arm_ptob(x)			((unsigned)(x) << PGSHIFT)
    100 #define arm_trunc_page(x)		((unsigned)(x) & ~PGOFSET)
    101 
    102 #ifdef _KERNEL
    103 #ifndef _LOCORE
    104 #ifndef __HIDE_DELAY
    105 void	delay(unsigned);
    106 #define DELAY(x)	delay(x)
    107 #endif
    108 #endif
    109 #endif
    110 
    111 #include <arm/param.h>
    112 
    113 #endif	/* _ARM_ARM32_PARAM_H_ */
    114