xref: /openbsd-src/sys/arch/hppa/include/vmparam.h (revision 240ca67eedd9dbda425e03270ace67b7f087b7e0)
1 /*	$OpenBSD: vmparam.h,v 1.48 2024/11/14 20:32:13 miod Exp $	*/
2 
3 /*
4  * Copyright (c) 1988-1994, The University of Utah and
5  * the Computer Systems Laboratory at the University of Utah (CSL).
6  * All rights reserved.
7  *
8  * Permission to use, copy, modify and distribute this software is hereby
9  * granted provided that (1) source code retains these copyright, permission,
10  * and disclaimer notices, and (2) redistributions including binaries
11  * reproduce the notices in supporting documentation, and (3) all advertising
12  * materials mentioning features or use of this software display the following
13  * acknowledgement: ``This product includes software developed by the
14  * Computer Systems Laboratory at the University of Utah.''
15  *
16  * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
17  * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
18  * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
19  *
20  * CSL requests users of this software to return to csl-dist@cs.utah.edu any
21  * improvements that they make and grant CSL redistribution rights.
22  *
23  * 	Utah $Hdr: vmparam.h 1.16 94/12/16$
24  */
25 
26 #ifndef _MACHINE_VMPARAM_H_
27 #define _MACHINE_VMPARAM_H_
28 
29 /*
30  * Machine dependent constants for HP PA
31  */
32 #define	USRSTACK	0xB8000000UL	/* start (bottom) of user stack */
33 #define	SYSCALLGATE	0xC0000000	/* syscall gateway page */
34 
35 /*
36  * Virtual memory related constants, all in bytes
37  */
38 #ifndef MAXTSIZ
39 #define	MAXTSIZ		(512*1024*1024UL)	/* max text size */
40 #endif
41 #ifndef DFLDSIZ
42 #define	DFLDSIZ		(16*1024*1024)		/* initial data size limit */
43 #endif
44 #ifndef MAXDSIZ
45 #define	MAXDSIZ		(1*1024*1024*1024UL)	/* max data size */
46 #endif
47 #ifndef BRKSIZ
48 #define	BRKSIZ		MAXDSIZ			/* heap gap size */
49 #endif
50 #ifndef	DFLSSIZ
51 #define	DFLSSIZ		(2*1024*1024)		/* initial stack size limit */
52 #endif
53 #ifndef	MAXSSIZ
54 #define	MAXSSIZ		(32*1024*1024UL)	/* max stack size */
55 #endif
56 
57 #define	STACKGAP_RANDOM	256*1024
58 
59 #ifndef USRIOSIZE
60 #define	USRIOSIZE	((2*HPPA_PGALIAS)/PAGE_SIZE)	/* 8mb */
61 #endif
62 
63 /*
64  * PTEs for system V style shared memory.
65  * This is basically slop for kmempt which we actually allocate (malloc) from.
66  */
67 #ifndef SHMMAXPGS
68 #define SHMMAXPGS	8192	/* 32mb */
69 #endif
70 
71 /* user/kernel map constants */
72 #define	VM_MIN_ADDRESS		((vaddr_t)PAGE_SIZE)
73 #define	VM_MAXUSER_ADDRESS	((vaddr_t)0xc0000000)
74 #define	VM_MAX_ADDRESS		VM_MAXUSER_ADDRESS
75 #define	VM_MIN_KERNEL_ADDRESS	((vaddr_t)0xc0001000)
76 #define	VM_MAX_KERNEL_ADDRESS	((vaddr_t)0xef000000)
77 
78 /* use a small range for PIE to minimize mmap pressure */
79 #define	VM_PIE_MIN_ADDR		PAGE_SIZE
80 #define	VM_PIE_MAX_ADDR		0x40000UL
81 
82 /* virtual sizes (bytes) for various kernel submaps */
83 #define VM_PHYS_SIZE		(USRIOSIZE*PAGE_SIZE)
84 
85 #define	VM_PHYSSEG_MAX		1	/* this many physmem segments */
86 #define	VM_PHYSSEG_STRAT	VM_PSTRAT_RANDOM
87 
88 #define	VM_PHYSSEG_NOADD	/* XXX until uvm code is fixed */
89 
90 #endif	/* _MACHINE_VMPARAM_H_ */
91