xref: /illumos-gate/usr/src/uts/i86pc/sys/machparam.h (revision b4203d75)
17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate  * CDDL HEADER START
37c478bd9Sstevel@tonic-gate  *
47c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
541791439Sandrei  * Common Development and Distribution License (the "License").
641791439Sandrei  * You may not use this file except in compliance with the License.
77c478bd9Sstevel@tonic-gate  *
87c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
107c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
117c478bd9Sstevel@tonic-gate  * and limitations under the License.
127c478bd9Sstevel@tonic-gate  *
137c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
147c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
167c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
177c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bd9Sstevel@tonic-gate  *
197c478bd9Sstevel@tonic-gate  * CDDL HEADER END
207c478bd9Sstevel@tonic-gate  */
217c478bd9Sstevel@tonic-gate /*
2223d9e5acSMichael Corcoran  * Copyright (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved.
23af868f46SMatthew Ahrens  * Copyright (c) 2015 by Delphix. All rights reserved.
242428aad8SPatrick Mooney  * Copyright 2016 Joyent, Inc.
257c478bd9Sstevel@tonic-gate  */
267c478bd9Sstevel@tonic-gate 
277c478bd9Sstevel@tonic-gate /*	Copyright (c) 1988 AT&T	*/
28*b4203d75SMarcel Telka /*	  All Rights Reserved	*/
297c478bd9Sstevel@tonic-gate 
307c478bd9Sstevel@tonic-gate 
317c478bd9Sstevel@tonic-gate #ifndef _SYS_MACHPARAM_H
327c478bd9Sstevel@tonic-gate #define	_SYS_MACHPARAM_H
337c478bd9Sstevel@tonic-gate 
3441791439Sandrei #if !defined(_ASM)
357c478bd9Sstevel@tonic-gate #include <sys/types.h>
36843e1988Sjohnlev 
37843e1988Sjohnlev #if defined(__xpv)
38843e1988Sjohnlev #include <sys/xpv_impl.h>
39843e1988Sjohnlev #endif
40843e1988Sjohnlev 
4141791439Sandrei #endif
427c478bd9Sstevel@tonic-gate 
437c478bd9Sstevel@tonic-gate #ifdef	__cplusplus
447c478bd9Sstevel@tonic-gate extern "C" {
457c478bd9Sstevel@tonic-gate #endif
467c478bd9Sstevel@tonic-gate 
477c478bd9Sstevel@tonic-gate #ifndef _ASM
487c478bd9Sstevel@tonic-gate #define	ADDRESS_C(c)    c ## ul
497c478bd9Sstevel@tonic-gate #else   /* _ASM */
507c478bd9Sstevel@tonic-gate #define	ADDRESS_C(c)    (c)
517c478bd9Sstevel@tonic-gate #endif  /* _ASM */
527c478bd9Sstevel@tonic-gate 
537c478bd9Sstevel@tonic-gate /*
5441791439Sandrei  * Machine dependent parameters and limits.
557c478bd9Sstevel@tonic-gate  */
56ae115bc7Smrj 
5741791439Sandrei #if defined(__amd64)
582428aad8SPatrick Mooney /*
592428aad8SPatrick Mooney  * If NCPU grows beyond 256, sizing for the x86 comm page will require
602428aad8SPatrick Mooney  * adjustment.
612428aad8SPatrick Mooney  */
62a563a037Sbholler #define	NCPU	256
6323d9e5acSMichael Corcoran #define	NCPU_LOG2	8
6441791439Sandrei #elif defined(__i386)
6541791439Sandrei #define	NCPU	32
6623d9e5acSMichael Corcoran #define	NCPU_LOG2	5
6741791439Sandrei #endif
687c478bd9Sstevel@tonic-gate 
69cb15d5d9SPeter Rival /* NCPU_P2 is NCPU rounded to a power of 2 */
70cb15d5d9SPeter Rival #define	NCPU_P2	(1 << NCPU_LOG2)
71cb15d5d9SPeter Rival 
727c478bd9Sstevel@tonic-gate /*
737c478bd9Sstevel@tonic-gate  * The value defined below could grow to 16. hat structure and
747c478bd9Sstevel@tonic-gate  * page_t have room for 16 nodes.
757c478bd9Sstevel@tonic-gate  */
767c478bd9Sstevel@tonic-gate #define	MAXNODES 	4
777c478bd9Sstevel@tonic-gate #define	NUMA_NODEMASK	0x0f
787c478bd9Sstevel@tonic-gate 
797c478bd9Sstevel@tonic-gate /*
807c478bd9Sstevel@tonic-gate  * Define the FPU symbol if we could run on a machine with an external
817c478bd9Sstevel@tonic-gate  * FPU (i.e. not integrated with the normal machine state like the vax).
827c478bd9Sstevel@tonic-gate  *
837c478bd9Sstevel@tonic-gate  * The fpu is defined in the architecture manual, and the kernel hides
847c478bd9Sstevel@tonic-gate  * its absence if it is not present, that's pretty integrated, no?
857c478bd9Sstevel@tonic-gate  */
867c478bd9Sstevel@tonic-gate 
877c478bd9Sstevel@tonic-gate /* supported page sizes */
8802bc52beSkchow #define	MMU_PAGE_SIZES	3
897c478bd9Sstevel@tonic-gate 
907c478bd9Sstevel@tonic-gate /*
917c478bd9Sstevel@tonic-gate  * MMU_PAGES* describes the physical page size used by the mapping hardware.
927c478bd9Sstevel@tonic-gate  * PAGES* describes the logical page size used by the system.
937c478bd9Sstevel@tonic-gate  */
947c478bd9Sstevel@tonic-gate 
957c478bd9Sstevel@tonic-gate #define	MMU_PAGESIZE	0x1000		/* 4096 bytes */
967c478bd9Sstevel@tonic-gate #define	MMU_PAGESHIFT	12		/* log2(MMU_PAGESIZE) */
9741791439Sandrei 
9841791439Sandrei #if !defined(_ASM)
997c478bd9Sstevel@tonic-gate #define	MMU_PAGEOFFSET	(MMU_PAGESIZE-1) /* Mask of address bits in page */
100ae115bc7Smrj #else	/* _ASM */
101ae115bc7Smrj #define	MMU_PAGEOFFSET	_CONST(MMU_PAGESIZE-1)	/* assembler lameness */
102ae115bc7Smrj #endif	/* _ASM */
10341791439Sandrei 
1047c478bd9Sstevel@tonic-gate #define	MMU_PAGEMASK	(~MMU_PAGEOFFSET)
1057c478bd9Sstevel@tonic-gate 
1067c478bd9Sstevel@tonic-gate #define	PAGESIZE	0x1000		/* All of the above, for logical */
1077c478bd9Sstevel@tonic-gate #define	PAGESHIFT	12
1087c478bd9Sstevel@tonic-gate #define	PAGEOFFSET	(PAGESIZE - 1)
1097c478bd9Sstevel@tonic-gate #define	PAGEMASK	(~PAGEOFFSET)
1107c478bd9Sstevel@tonic-gate 
1117c478bd9Sstevel@tonic-gate /*
1127c478bd9Sstevel@tonic-gate  * DATA_ALIGN is used to define the alignment of the Unix data segment.
1137c478bd9Sstevel@tonic-gate  */
1147c478bd9Sstevel@tonic-gate #define	DATA_ALIGN	PAGESIZE
1157c478bd9Sstevel@tonic-gate 
1167c478bd9Sstevel@tonic-gate /*
11741791439Sandrei  * DEFAULT KERNEL THREAD stack size (in pages).
1187c478bd9Sstevel@tonic-gate  */
1197c478bd9Sstevel@tonic-gate #if defined(__amd64)
12041791439Sandrei #define	DEFAULTSTKSZ_NPGS	5
1217c478bd9Sstevel@tonic-gate #elif defined(__i386)
122bfa1c0bcSSherry Moore #define	DEFAULTSTKSZ_NPGS	3
1237c478bd9Sstevel@tonic-gate #endif
1247c478bd9Sstevel@tonic-gate 
12541791439Sandrei #if !defined(_ASM)
12641791439Sandrei #define	DEFAULTSTKSZ	(DEFAULTSTKSZ_NPGS * PAGESIZE)
12741791439Sandrei #else	/* !_ASM */
12841791439Sandrei #define	DEFAULTSTKSZ	_MUL(DEFAULTSTKSZ_NPGS, PAGESIZE) /* as(1) lameness */
12941791439Sandrei #endif	/* !_ASM */
13041791439Sandrei 
1317c478bd9Sstevel@tonic-gate /*
1327c478bd9Sstevel@tonic-gate  * KERNELBASE is the virtual address at which the kernel segments start in
1337c478bd9Sstevel@tonic-gate  * all contexts.
1347c478bd9Sstevel@tonic-gate  *
13535b1ab99Sjosephb  * KERNELBASE is not fixed.  The value of KERNELBASE can change with
13635b1ab99Sjosephb  * installed memory or on 32 bit systems the eprom variable 'eprom_kernelbase'.
1377c478bd9Sstevel@tonic-gate  *
13835b1ab99Sjosephb  * common/conf/param.c requires a compile time defined value for KERNELBASE.
13935b1ab99Sjosephb  * This value is save in the variable _kernelbase.  _kernelbase may then be
14035b1ab99Sjosephb  * modified with to a different value in i86pc/os/startup.c.
1417c478bd9Sstevel@tonic-gate  *
14235b1ab99Sjosephb  * Most code should be using kernelbase, which resolves to a reference to
14335b1ab99Sjosephb  * _kernelbase.
1447c478bd9Sstevel@tonic-gate  */
145ae115bc7Smrj #define	KERNEL_TEXT_amd64	UINT64_C(0xfffffffffb800000)
146843e1988Sjohnlev 
147843e1988Sjohnlev #ifdef __i386
148843e1988Sjohnlev 
149ae115bc7Smrj #define	KERNEL_TEXT_i386	ADDRESS_C(0xfe800000)
1507c478bd9Sstevel@tonic-gate 
151843e1988Sjohnlev /*
152843e1988Sjohnlev  * We don't use HYPERVISOR_VIRT_START, as we need both the PAE and non-PAE
153843e1988Sjohnlev  * versions in our code. We always compile based on the lower PAE address.
154843e1988Sjohnlev  */
155843e1988Sjohnlev #define	KERNEL_TEXT_i386_xpv	\
156843e1988Sjohnlev 	(HYPERVISOR_VIRT_START_PAE - 3 * ADDRESS_C(0x400000))
157843e1988Sjohnlev 
158843e1988Sjohnlev #endif /* __i386 */
159843e1988Sjohnlev 
1607c478bd9Sstevel@tonic-gate #if defined(__amd64)
1617c478bd9Sstevel@tonic-gate 
1627c478bd9Sstevel@tonic-gate #define	KERNELBASE	ADDRESS_C(0xfffffd8000000000)
1637c478bd9Sstevel@tonic-gate 
1647c478bd9Sstevel@tonic-gate /*
1657c478bd9Sstevel@tonic-gate  * Size of the unmapped "red zone" at the very bottom of the kernel's
1667c478bd9Sstevel@tonic-gate  * address space.  Corresponds to 1 slot in the toplevel pagetable.
1677c478bd9Sstevel@tonic-gate  */
1687c478bd9Sstevel@tonic-gate #define	KERNEL_REDZONE_SIZE   ((uintptr_t)1 << 39)
1697c478bd9Sstevel@tonic-gate 
1707c478bd9Sstevel@tonic-gate /*
1717c478bd9Sstevel@tonic-gate  * Base of 'core' heap area, which is used for kernel and module text/data
1727c478bd9Sstevel@tonic-gate  * that must be within a 2GB range to allow for rip-relative addressing.
1737c478bd9Sstevel@tonic-gate  */
1747c478bd9Sstevel@tonic-gate #define	COREHEAP_BASE	ADDRESS_C(0xffffffffc0000000)
1757c478bd9Sstevel@tonic-gate 
1767c478bd9Sstevel@tonic-gate /*
17735b1ab99Sjosephb  * Beginning of the segkpm window. A lower value than this is used if
17835b1ab99Sjosephb  * physical addresses exceed 1TB. See i86pc/os/startup.c
1797c478bd9Sstevel@tonic-gate  */
1807c478bd9Sstevel@tonic-gate #define	SEGKPM_BASE	ADDRESS_C(0xfffffe0000000000)
1817c478bd9Sstevel@tonic-gate 
182ae115bc7Smrj /*
18335b1ab99Sjosephb  * This is valloc_base, above seg_kpm, but below everything else.
18435b1ab99Sjosephb  * A lower value than this may be used if SEGKPM_BASE is adjusted.
18535b1ab99Sjosephb  * See i86pc/os/startup.c
186ae115bc7Smrj  */
187ae115bc7Smrj #define	VALLOC_BASE	ADDRESS_C(0xffffff0000000000)
188ae115bc7Smrj 
1897c478bd9Sstevel@tonic-gate /*
1907c478bd9Sstevel@tonic-gate  * default and boundary sizes for segkp
1917c478bd9Sstevel@tonic-gate  */
1927c478bd9Sstevel@tonic-gate #define	SEGKPDEFSIZE	(2L * 1024L * 1024L * 1024L)		/*   2G */
1937c478bd9Sstevel@tonic-gate #define	SEGKPMAXSIZE	(8L * 1024L * 1024L * 1024L)		/*   8G */
1947c478bd9Sstevel@tonic-gate #define	SEGKPMINSIZE	(200L * 1024 * 1024L)			/* 200M */
1957c478bd9Sstevel@tonic-gate 
196ad23a2dbSjohansen /*
197ad23a2dbSjohansen  * minimum size for segzio
198ad23a2dbSjohansen  */
199ad23a2dbSjohansen #define	SEGZIOMINSIZE	(400L * 1024 * 1024L)			/* 400M */
200ad23a2dbSjohansen 
2017c478bd9Sstevel@tonic-gate /*
202ae115bc7Smrj  * During intial boot we limit heap to the top 4Gig.
2037c478bd9Sstevel@tonic-gate  */
204ae115bc7Smrj #define	BOOT_KERNELHEAP_BASE	ADDRESS_C(0xffffffff00000000)
2057c478bd9Sstevel@tonic-gate 
2067c478bd9Sstevel@tonic-gate /*
2077c478bd9Sstevel@tonic-gate  * VMWare works best if we don't use the top 64Meg of memory for amd64.
2087c478bd9Sstevel@tonic-gate  * Set KERNEL_TEXT to top_o_memory - 64Meg - 8 Meg for 8Meg of nucleus pages.
2097c478bd9Sstevel@tonic-gate  */
2107c478bd9Sstevel@tonic-gate #define	PROMSTART	ADDRESS_C(0xffc00000)
211ae115bc7Smrj #define	KERNEL_TEXT	KERNEL_TEXT_amd64
212ae115bc7Smrj 
213ae115bc7Smrj /*
214ae115bc7Smrj  * Virtual address range available to the debugger
215ae115bc7Smrj  */
216ae115bc7Smrj #define	SEGDEBUGBASE	ADDRESS_C(0xffffffffff800000)
217ae115bc7Smrj #define	SEGDEBUGSIZE	ADDRESS_C(0x400000)
2187c478bd9Sstevel@tonic-gate 
2197c478bd9Sstevel@tonic-gate /*
2207c478bd9Sstevel@tonic-gate  * Define upper limit on user address space
2217c478bd9Sstevel@tonic-gate  *
2227c478bd9Sstevel@tonic-gate  * In amd64, the upper limit on a 64-bit user address space is 1 large page
2237c478bd9Sstevel@tonic-gate  * (2MB) below kernelbase.  The upper limit for a 32-bit user address space
2247c478bd9Sstevel@tonic-gate  * is 1 small page (4KB) below the top of the 32-bit range.  The 64-bit
2257c478bd9Sstevel@tonic-gate  * limit give dtrace the red zone it needs below kernelbase.  The 32-bit
2267c478bd9Sstevel@tonic-gate  * limit gives us a small red zone to detect address-space overruns in a
2277c478bd9Sstevel@tonic-gate  * user program.
228843e1988Sjohnlev  *
229843e1988Sjohnlev  * On the hypervisor, we limit the user to memory below the VA hole.
230843e1988Sjohnlev  * Subtract 1 large page for a red zone.
2317c478bd9Sstevel@tonic-gate  */
232843e1988Sjohnlev #if defined(__xpv)
233843e1988Sjohnlev #define	USERLIMIT	ADDRESS_C(0x00007fffffe00000)
234843e1988Sjohnlev #else
2357c478bd9Sstevel@tonic-gate #define	USERLIMIT	ADDRESS_C(0xfffffd7fffe00000)
236843e1988Sjohnlev #endif
237843e1988Sjohnlev 
2387c478bd9Sstevel@tonic-gate #ifdef bug_5074717_is_fixed
2397c478bd9Sstevel@tonic-gate #define	USERLIMIT32	ADDRESS_C(0xfffff000)
2407c478bd9Sstevel@tonic-gate #else
2417c478bd9Sstevel@tonic-gate #define	USERLIMIT32	ADDRESS_C(0xfefff000)
2427c478bd9Sstevel@tonic-gate #endif
2437c478bd9Sstevel@tonic-gate 
2447c478bd9Sstevel@tonic-gate #elif defined(__i386)
2457c478bd9Sstevel@tonic-gate 
2467c478bd9Sstevel@tonic-gate #ifdef DEBUG
2477c478bd9Sstevel@tonic-gate #define	KERNELBASE	ADDRESS_C(0xc8000000)
2487c478bd9Sstevel@tonic-gate #else
2497c478bd9Sstevel@tonic-gate #define	KERNELBASE	ADDRESS_C(0xd4000000)
2507c478bd9Sstevel@tonic-gate #endif
2517c478bd9Sstevel@tonic-gate 
2527c478bd9Sstevel@tonic-gate #define	KERNELBASE_MAX	ADDRESS_C(0xe0000000)
2537c478bd9Sstevel@tonic-gate 
2547c478bd9Sstevel@tonic-gate /*
2557c478bd9Sstevel@tonic-gate  * The i386 ABI requires that the user address space be at least 3Gb
2567c478bd9Sstevel@tonic-gate  * in size.  KERNELBASE_ABI_MIN is used as the default KERNELBASE for
2577c478bd9Sstevel@tonic-gate  * physical memory configurations > 4gb.
2587c478bd9Sstevel@tonic-gate  */
2597c478bd9Sstevel@tonic-gate #define	KERNELBASE_ABI_MIN	ADDRESS_C(0xc0000000)
2607c478bd9Sstevel@tonic-gate 
2617c478bd9Sstevel@tonic-gate /*
2627c478bd9Sstevel@tonic-gate  * Size of the unmapped "red zone" at the very bottom of the kernel's
2637c478bd9Sstevel@tonic-gate  * address space.  Since segmap start immediately above the red zone, this
2647c478bd9Sstevel@tonic-gate  * needs to be MAXBSIZE aligned.
2657c478bd9Sstevel@tonic-gate  */
2667c478bd9Sstevel@tonic-gate #define	KERNEL_REDZONE_SIZE   MAXBSIZE
2677c478bd9Sstevel@tonic-gate 
2687c478bd9Sstevel@tonic-gate /*
2697c478bd9Sstevel@tonic-gate  * This is the last 4MB of the 4G address space. Some psm modules
2707c478bd9Sstevel@tonic-gate  * need this region of virtual address space mapped 1-1
271843e1988Sjohnlev  * The top 64MB of the address space is reserved for the hypervisor.
2727c478bd9Sstevel@tonic-gate  */
2737c478bd9Sstevel@tonic-gate #define	PROMSTART	ADDRESS_C(0xffc00000)
274843e1988Sjohnlev #ifdef __xpv
275843e1988Sjohnlev #define	KERNEL_TEXT	KERNEL_TEXT_i386_xpv
276843e1988Sjohnlev #else
277ae115bc7Smrj #define	KERNEL_TEXT	KERNEL_TEXT_i386
278843e1988Sjohnlev #endif
279ae115bc7Smrj 
280ae115bc7Smrj /*
281ae115bc7Smrj  * Virtual address range available to the debugger
282ae115bc7Smrj  * We place it just above the kernel text (4M) and kernel data (4M).
283ae115bc7Smrj  */
284ae115bc7Smrj #define	SEGDEBUGBASE	(KERNEL_TEXT + ADDRESS_C(0x800000))
285ae115bc7Smrj #define	SEGDEBUGSIZE	ADDRESS_C(0x400000)
2867c478bd9Sstevel@tonic-gate 
2877c478bd9Sstevel@tonic-gate /*
2887c478bd9Sstevel@tonic-gate  * Define upper limit on user address space
2897c478bd9Sstevel@tonic-gate  */
2907c478bd9Sstevel@tonic-gate #define	USERLIMIT	KERNELBASE
2917c478bd9Sstevel@tonic-gate #define	USERLIMIT32	USERLIMIT
2927c478bd9Sstevel@tonic-gate 
2937c478bd9Sstevel@tonic-gate #endif	/* __i386 */
2947c478bd9Sstevel@tonic-gate 
295ae115bc7Smrj /*
2960cfdb603Sjosephb  * Reserve pages just below KERNEL_TEXT for the GDT, IDT, TSS and debug info.
29782664878Sjosephb  *
29882664878Sjosephb  * For now, DEBUG_INFO_VA must be first in this list for "xm" initiated dumps
29982664878Sjosephb  * of solaris domUs to be usable with mdb. Relying on a fixed VA is not viable
30082664878Sjosephb  * long term, but it's the best we've got for now.
301ae115bc7Smrj  */
302ae115bc7Smrj #if !defined(_ASM)
30382664878Sjosephb #define	DEBUG_INFO_VA	(KERNEL_TEXT - MMU_PAGESIZE)
30482664878Sjosephb #define	GDT_VA		(DEBUG_INFO_VA - MMU_PAGESIZE)
3050cfdb603Sjosephb #define	IDT_VA		(GDT_VA - MMU_PAGESIZE)
3060cfdb603Sjosephb #define	KTSS_VA		(IDT_VA - MMU_PAGESIZE)
3070cfdb603Sjosephb #define	DFTSS_VA	(KTSS_VA - MMU_PAGESIZE)
30882664878Sjosephb #define	MISC_VA_BASE	(DFTSS_VA)
3090cfdb603Sjosephb #define	MISC_VA_SIZE	(KERNEL_TEXT - MISC_VA_BASE)
310ae115bc7Smrj #endif /* !_ASM */
311ae115bc7Smrj 
312ae115bc7Smrj #if !defined(_ASM) && !defined(_KMDB)
313ae115bc7Smrj extern uintptr_t kernelbase, segmap_start, segmapsize;
3147c478bd9Sstevel@tonic-gate #endif
3157c478bd9Sstevel@tonic-gate 
3167c478bd9Sstevel@tonic-gate /*
3177c478bd9Sstevel@tonic-gate  * ARGSBASE is the base virtual address of the range which
3187c478bd9Sstevel@tonic-gate  * the kernel uses to map the arguments for exec.
3197c478bd9Sstevel@tonic-gate  */
3207c478bd9Sstevel@tonic-gate #define	ARGSBASE	PROMSTART
3217c478bd9Sstevel@tonic-gate 
3227c478bd9Sstevel@tonic-gate /*
3237c478bd9Sstevel@tonic-gate  * reserve space for modules
3247c478bd9Sstevel@tonic-gate  */
3257c478bd9Sstevel@tonic-gate #define	MODTEXT	(1024 * 1024 * 2)
3267c478bd9Sstevel@tonic-gate #define	MODDATA	(1024 * 300)
3277c478bd9Sstevel@tonic-gate 
3287c478bd9Sstevel@tonic-gate /*
3297c478bd9Sstevel@tonic-gate  * The heap has a region allocated from it of HEAPTEXT_SIZE bytes specifically
3307c478bd9Sstevel@tonic-gate  * for module text.
3317c478bd9Sstevel@tonic-gate  */
3327c478bd9Sstevel@tonic-gate #define	HEAPTEXT_SIZE		(64 * 1024 * 1024)	/* bytes */
3337c478bd9Sstevel@tonic-gate 
3347c478bd9Sstevel@tonic-gate /*
3357c478bd9Sstevel@tonic-gate  * Size of a kernel threads stack.  It must be a whole number of pages
3367c478bd9Sstevel@tonic-gate  * since the segment it comes from will only allocate space in pages.
3377c478bd9Sstevel@tonic-gate  */
3387c478bd9Sstevel@tonic-gate #define	T_STACKSZ	2*PAGESIZE
3397c478bd9Sstevel@tonic-gate 
3407c478bd9Sstevel@tonic-gate /*
3417c478bd9Sstevel@tonic-gate  * Size of a cpu startup thread stack.  (It must be a whole number of pages
3427c478bd9Sstevel@tonic-gate  * since the containing segment only allocates space in pages.)
3437c478bd9Sstevel@tonic-gate  */
3447c478bd9Sstevel@tonic-gate 
3457c478bd9Sstevel@tonic-gate #define	STARTUP_STKSZ	3*PAGESIZE
3467c478bd9Sstevel@tonic-gate 
3477c478bd9Sstevel@tonic-gate /*
3487c478bd9Sstevel@tonic-gate  * Bus types
3497c478bd9Sstevel@tonic-gate  */
3507c478bd9Sstevel@tonic-gate #define	BTISA		1
3517c478bd9Sstevel@tonic-gate #define	BTEISA		2
3527c478bd9Sstevel@tonic-gate #define	BTMCA		3
3537c478bd9Sstevel@tonic-gate 
3547c478bd9Sstevel@tonic-gate #ifdef	__cplusplus
3557c478bd9Sstevel@tonic-gate }
3567c478bd9Sstevel@tonic-gate #endif
3577c478bd9Sstevel@tonic-gate 
3587c478bd9Sstevel@tonic-gate #endif	/* _SYS_MACHPARAM_H */
359