1/*	$NetBSD: param.h,v 1.34 2021/05/30 07:20:00 rin 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#include "opt_kasan.h"
 41#include "opt_param.h"
 42#endif
 43
 44/*
 45 * Machine dependent constants for ARM6+ processors
 46 */
 47/* These are defined in the Port File before it includes
 48 * this file. */
 49
 50#ifndef PGSHIFT
 51#define	PGSHIFT		12		/* LOG2(NBPG) */
 52#endif
 53#define	NBPG		(1 << PGSHIFT)	/* bytes/page */
 54#define	PGOFSET		(NBPG - 1)	/* byte offset into page */
 55#define	NPTEPG		(NBPG / sizeof(pt_entry_t))	/* PTEs per Page */
 56
 57#define SSIZE		1		/* initial stack size/NBPG */
 58#define SINCR		1		/* increment of stack/NBPG */
 59#ifdef KASAN
 60#define UPAGES		4
 61#else
 62#define UPAGES		2
 63#endif
 64#define USPACE		(UPAGES * NBPG)	/* total size of u-area */
 65
 66#ifndef MSGBUFSIZE
 67#define MSGBUFSIZE	16384	 	/* default message buffer size */
 68#endif
 69
 70/*
 71 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
 72 * logical pages.
 73 */
 74#define	NKMEMPAGES_MIN_DEFAULT	((8 * 1024 * 1024) >> PAGE_SHIFT)
 75
 76#if defined(_ARM_ARCH_6) && !defined(KASAN)
 77#define	NKMEMPAGES_MAX_DEFAULT	((768 * 1024 * 1024) >> PAGE_SHIFT)
 78#else
 79#define	NKMEMPAGES_MAX_DEFAULT	((256 * 1024 * 1024) >> PAGE_SHIFT)
 80#endif
 81
 82/* Constants used to divide the USPACE area */
 83
 84/*
 85 * The USPACE area contains :
 86 * 1. the pcb structure for the process
 87 * 2. the kernel (svc) stack
 88 *
 89 * The layout of the area looks like this
 90 *
 91 * | uarea | kernel stack |
 92 *
 93 * The size of the uarea is known.
 94 * The kernel stack should be at least 4K is size.
 95 *
 96 * The stack top addresses are used to set the stack pointers. The stack bottom
 97 * addresses at the addresses monitored by the diagnostic code for stack overflows
 98 *
 99 */
100
101#define USPACE_SVC_STACK_TOP		(USPACE)
102#define USPACE_SVC_STACK_BOTTOM		(sizeof(struct pcb))
103
104#define arm_btop(x)			((unsigned)(x) >> PGSHIFT)
105#define arm_ptob(x)			((unsigned)(x) << PGSHIFT)
106
107#ifdef _KERNEL
108#ifndef _LOCORE
109#ifndef __HIDE_DELAY
110void	delay(unsigned);
111#define DELAY(x)	delay(x)
112#endif
113#endif
114#endif
115
116#include <arm/param.h>
117
118#endif	/* _ARM_ARM32_PARAM_H_ */