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_ */