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param.h revision 1.21 
      1 /*	$NetBSD: param.h,v 1.21 2014/03/30 15:50:51 matt 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
     39 # include <machine/cpu.h>
     40 #endif
     41 #ifdef _KERNEL_OPT
     42 # include "opt_arm32_pmap.h"
     43 #endif
     44 
     45 /*
     46  * Machine dependent constants for ARM6+ processors
     47  */
     48 /* These are defined in the Port File before it includes
     49  * this file. */
     50 
     51 #ifndef PGSHIFT
     52 #if defined(_ARM_ARCH_6)
     53 #define	PGSHIFT		13		/* LOG2(NBPG) */
     54 #else
     55 #define	PGSHIFT		12		/* LOG2(NBPG) */
     56 #endif
     57 #endif
     58 #define	NBPG		(1 << PGSHIFT)	/* bytes/page */
     59 #define	PGOFSET		(NBPG-1)	/* byte offset into page */
     60 #define	NPTEPG		(NBPG/(sizeof (pt_entry_t)))
     61 
     62 
     63 #define SSIZE		1		/* initial stack size/NBPG */
     64 #define SINCR		1		/* increment of stack/NBPG */
     65 #define USPACE		8192		/* total size of u-area */
     66 #define UPAGES		(USPACE / NBPG)	/* pages of u-area */
     67 
     68 #ifndef MSGBUFSIZE
     69 #define MSGBUFSIZE	16384	 	/* default message buffer size */
     70 #endif
     71 
     72 /*
     73  * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
     74  * logical pages.
     75  */
     76 #define	NKMEMPAGES_MIN_DEFAULT	((8 * 1024 * 1024) >> PAGE_SHIFT)
     77 #define	NKMEMPAGES_MAX_DEFAULT	((128 * 1024 * 1024) >> PAGE_SHIFT)
     78 
     79 /* Constants used to divide the USPACE area */
     80 
     81 /*
     82  * The USPACE area contains :
     83  * 1. the pcb structure for the process
     84  * 2. the kernel (svc) stack
     85  *
     86  * The layout of the area looks like this
     87  *
     88  * | uarea | kernel stack |
     89  *
     90  * The size of the uarea is known.
     91  * The kernel stack should be at least 4K is size.
     92  *
     93  * The stack top addresses are used to set the stack pointers. The stack bottom
     94  * addresses at the addresses monitored by the diagnostic code for stack overflows
     95  *
     96  */
     97 
     98 #define USPACE_SVC_STACK_TOP		(USPACE)
     99 #define USPACE_SVC_STACK_BOTTOM		(sizeof(struct pcb))
    100 
    101 #define arm_btop(x)			((unsigned)(x) >> PGSHIFT)
    102 #define arm_ptob(x)			((unsigned)(x) << PGSHIFT)
    103 #define arm_trunc_page(x)		((unsigned)(x) & ~PGOFSET)
    104 
    105 #ifdef _KERNEL
    106 #ifndef _LOCORE
    107 void	delay(unsigned);
    108 #define DELAY(x)	delay(x)
    109 #endif
    110 #endif
    111 
    112 #include <arm/param.h>
    113 
    114 #endif	/* _ARM_ARM32_PARAM_H_ */
    115