xref: /illumos-gate/usr/src/uts/i86pc/sys/machparam.h (revision 4c7b9a81)
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.
2474ecdb51SJohn Levon  * Copyright 2018 Joyent, Inc.
257c478bd9Sstevel@tonic-gate  */
277c478bd9Sstevel@tonic-gate /*	Copyright (c) 1988 AT&T	*/
28b4203d75SMarcel Telka /*	  All Rights Reserved	*/
317c478bd9Sstevel@tonic-gate #ifndef _SYS_MACHPARAM_H
327c478bd9Sstevel@tonic-gate #define	_SYS_MACHPARAM_H
3404909c8cSJohn Levon #ifndef _ASM
3504909c8cSJohn Levon 
367c478bd9Sstevel@tonic-gate #include <sys/types.h>
38843e1988Sjohnlev #if defined(__xpv)
39843e1988Sjohnlev #include <sys/xpv_impl.h>
40843e1988Sjohnlev #endif
4204909c8cSJohn Levon #endif /* !_ASM */
447c478bd9Sstevel@tonic-gate #ifdef	__cplusplus
457c478bd9Sstevel@tonic-gate extern "C" {
467c478bd9Sstevel@tonic-gate #endif
487c478bd9Sstevel@tonic-gate #ifndef _ASM
497c478bd9Sstevel@tonic-gate #define	ADDRESS_C(c)    c ## ul
507c478bd9Sstevel@tonic-gate #else   /* _ASM */
517c478bd9Sstevel@tonic-gate #define	ADDRESS_C(c)    (c)
527c478bd9Sstevel@tonic-gate #endif  /* _ASM */
547c478bd9Sstevel@tonic-gate /*
5541791439Sandrei  * Machine dependent parameters and limits.
567c478bd9Sstevel@tonic-gate  */
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
65cb15d5d9SPeter Rival /* NCPU_P2 is NCPU rounded to a power of 2 */
66cb15d5d9SPeter Rival #define	NCPU_P2	(1 << NCPU_LOG2)
67cb15d5d9SPeter Rival 
687c478bd9Sstevel@tonic-gate /*
697c478bd9Sstevel@tonic-gate  * The value defined below could grow to 16. hat structure and
707c478bd9Sstevel@tonic-gate  * page_t have room for 16 nodes.
717c478bd9Sstevel@tonic-gate  */
727c478bd9Sstevel@tonic-gate #define	MAXNODES 	4
737c478bd9Sstevel@tonic-gate #define	NUMA_NODEMASK	0x0f
757c478bd9Sstevel@tonic-gate /*
767c478bd9Sstevel@tonic-gate  * Define the FPU symbol if we could run on a machine with an external
777c478bd9Sstevel@tonic-gate  * FPU (i.e. not integrated with the normal machine state like the vax).
787c478bd9Sstevel@tonic-gate  *
797c478bd9Sstevel@tonic-gate  * The fpu is defined in the architecture manual, and the kernel hides
807c478bd9Sstevel@tonic-gate  * its absence if it is not present, that's pretty integrated, no?
817c478bd9Sstevel@tonic-gate  */
837c478bd9Sstevel@tonic-gate /* supported page sizes */
8402bc52beSkchow #define	MMU_PAGE_SIZES	3
867c478bd9Sstevel@tonic-gate /*
877c478bd9Sstevel@tonic-gate  * MMU_PAGES* describes the physical page size used by the mapping hardware.
887c478bd9Sstevel@tonic-gate  * PAGES* describes the logical page size used by the system.
897c478bd9Sstevel@tonic-gate  */
917c478bd9Sstevel@tonic-gate #define	MMU_PAGESIZE	0x1000		/* 4096 bytes */
927c478bd9Sstevel@tonic-gate #define	MMU_PAGESHIFT	12		/* log2(MMU_PAGESIZE) */
9441791439Sandrei #if !defined(_ASM)
957c478bd9Sstevel@tonic-gate #define	MMU_PAGEOFFSET	(MMU_PAGESIZE-1) /* Mask of address bits in page */
96ae115bc7Smrj #else	/* _ASM */
97ae115bc7Smrj #define	MMU_PAGEOFFSET	_CONST(MMU_PAGESIZE-1)	/* assembler lameness */
98ae115bc7Smrj #endif	/* _ASM */
1007c478bd9Sstevel@tonic-gate #define	MMU_PAGEMASK	(~MMU_PAGEOFFSET)
1027c478bd9Sstevel@tonic-gate #define	PAGESIZE	0x1000		/* All of the above, for logical */
1037c478bd9Sstevel@tonic-gate #define	PAGESHIFT	12
1047c478bd9Sstevel@tonic-gate #define	PAGEOFFSET	(PAGESIZE - 1)
1057c478bd9Sstevel@tonic-gate #define	PAGEMASK	(~PAGEOFFSET)
1077c478bd9Sstevel@tonic-gate /*
1087c478bd9Sstevel@tonic-gate  * DATA_ALIGN is used to define the alignment of the Unix data segment.
1097c478bd9Sstevel@tonic-gate  */
1107c478bd9Sstevel@tonic-gate #define	DATA_ALIGN	PAGESIZE
1127c478bd9Sstevel@tonic-gate /*
11341791439Sandrei  * DEFAULT KERNEL THREAD stack size (in pages).
1147c478bd9Sstevel@tonic-gate  */
11541791439Sandrei #define	DEFAULTSTKSZ_NPGS	5
11741791439Sandrei #if !defined(_ASM)
11941791439Sandrei #else	/* !_ASM */
12041791439Sandrei #define	DEFAULTSTKSZ	_MUL(DEFAULTSTKSZ_NPGS, PAGESIZE) /* as(1) lameness */
12141791439Sandrei #endif	/* !_ASM */
1237c478bd9Sstevel@tonic-gate /*
12404909c8cSJohn Levon  * During intial boot we limit heap to the top 4Gig.
1257c478bd9Sstevel@tonic-gate  */
12604909c8cSJohn Levon #define	BOOT_KERNELHEAP_BASE	ADDRESS_C(0xffffffff00000000)
128843e1988Sjohnlev /*
12904909c8cSJohn Levon  * VMWare works best if we don't use the top 64Meg of memory for amd64.
13004909c8cSJohn Levon  * Set KERNEL_TEXT to top_o_memory - 64Meg - 8 Meg for 8Meg of nucleus pages.
131843e1988Sjohnlev  */
13204909c8cSJohn Levon #define	PROMSTART	ADDRESS_C(0xffc00000)
13404909c8cSJohn Levon /*
13504909c8cSJohn Levon  * Virtual address range available to the debugger
13604909c8cSJohn Levon  */
13704909c8cSJohn Levon #define	SEGDEBUGBASE	ADDRESS_C(0xffffffffff800000)
13804909c8cSJohn Levon #define	SEGDEBUGSIZE	ADDRESS_C(0x400000)
14004909c8cSJohn Levon #define	KERNEL_TEXT	UINT64_C(0xfffffffffb800000)
1427c478bd9Sstevel@tonic-gate /*
14304909c8cSJohn Levon  * Reserve pages just below KERNEL_TEXT for the GDT, IDT, LDT, TSS and debug
14404909c8cSJohn Levon  * info.
14504909c8cSJohn Levon  *
14604909c8cSJohn Levon  * For now, DEBUG_INFO_VA must be first in this list for "xm" initiated dumps
14704909c8cSJohn Levon  * of solaris domUs to be usable with mdb. Relying on a fixed VA is not viable
14804909c8cSJohn Levon  * long term, but it's the best we've got for now.
1497c478bd9Sstevel@tonic-gate  */
15004909c8cSJohn Levon #if !defined(_ASM)
15104909c8cSJohn Levon #define	DEBUG_INFO_VA	(KERNEL_TEXT - MMU_PAGESIZE)
15204909c8cSJohn Levon #define	GDT_VA		(DEBUG_INFO_VA - MMU_PAGESIZE)
15304909c8cSJohn Levon #define	IDT_VA		(GDT_VA - MMU_PAGESIZE)
15404909c8cSJohn Levon #define	LDT_VA		(IDT_VA - (16 * MMU_PAGESIZE))
155*4c7b9a81SPatrick Mooney #define	KTSS_VA		(LDT_VA - MMU_PAGESIZE)
15604909c8cSJohn Levon #define	DFTSS_VA	(KTSS_VA - MMU_PAGESIZE)
15704909c8cSJohn Levon #define	MISC_VA_BASE	(DFTSS_VA)
15804909c8cSJohn Levon #define	MISC_VA_SIZE	(KERNEL_TEXT - MISC_VA_BASE)
15904909c8cSJohn Levon #endif /* !_ASM */
1617c478bd9Sstevel@tonic-gate /*
1627c478bd9Sstevel@tonic-gate  * Base of 'core' heap area, which is used for kernel and module text/data
1637c478bd9Sstevel@tonic-gate  * that must be within a 2GB range to allow for rip-relative addressing.
1647c478bd9Sstevel@tonic-gate  */
1657c478bd9Sstevel@tonic-gate #define	COREHEAP_BASE	ADDRESS_C(0xffffffffc0000000)
167ae115bc7Smrj /*
16835b1ab99Sjosephb  * This is valloc_base, above seg_kpm, but below everything else.
16935b1ab99Sjosephb  * A lower value than this may be used if SEGKPM_BASE is adjusted.
17035b1ab99Sjosephb  * See i86pc/os/startup.c
171ae115bc7Smrj  */
17204909c8cSJohn Levon #define	VALLOC_BASE	ADDRESS_C(0xfffffe0000000000)
17304909c8cSJohn Levon 
17404909c8cSJohn Levon #define	SEGZIOMINSIZE	(400L * 1024 * 1024L)			/* 400M */
17504909c8cSJohn Levon #define	SEGVMMMINSIZE	(4096L * 1024 * 1024L)			/* 4G */
1777c478bd9Sstevel@tonic-gate #define	SEGKPDEFSIZE	(2L * 1024L * 1024L * 1024L)		/*   2G */
1787c478bd9Sstevel@tonic-gate #define	SEGKPMAXSIZE	(8L * 1024L * 1024L * 1024L)		/*   8G */
1797c478bd9Sstevel@tonic-gate #define	SEGKPMINSIZE	(200L * 1024 * 1024L)			/* 200M */
18104909c8cSJohn Levon #define	SEGKPM_BASE	ADDRESS_C(0xfffffd0000000000)
1837c478bd9Sstevel@tonic-gate /*
18404909c8cSJohn Levon  * KERNELBASE is the virtual address at which the kernel segments start in
18504909c8cSJohn Levon  * all contexts.
18604909c8cSJohn Levon  *
18704909c8cSJohn Levon  * KERNELBASE is not fixed.  The value of KERNELBASE can change with
18804909c8cSJohn Levon  * installed memory size.
18904909c8cSJohn Levon  *
19004909c8cSJohn Levon  * common/conf/param.c requires a compile time defined value for KERNELBASE.
19104909c8cSJohn Levon  * This value is save in the variable _kernelbase.  _kernelbase may then be
19204909c8cSJohn Levon  * modified with to a different value in i86pc/os/startup.c.
19304909c8cSJohn Levon  *
19404909c8cSJohn Levon  * Most code should be using kernelbase, which resolves to a reference to
19504909c8cSJohn Levon  * _kernelbase.
1967c478bd9Sstevel@tonic-gate  */
19704909c8cSJohn Levon #define	KERNELBASE	ADDRESS_C(0xfffffc8000000000)
199ae115bc7Smrj /*
20004909c8cSJohn Levon  * Size of the unmapped "red zone" at the very bottom of the kernel's
20104909c8cSJohn Levon  * address space.  Corresponds to 1 slot in the toplevel pagetable.
202ae115bc7Smrj  */
20304909c8cSJohn Levon #define	KERNEL_REDZONE_SIZE   ((uintptr_t)1 << 39)
2057c478bd9Sstevel@tonic-gate /*
2067c478bd9Sstevel@tonic-gate  * Define upper limit on user address space
2077c478bd9Sstevel@tonic-gate  *
20804909c8cSJohn Levon  * The upper limit on a 64-bit user address space is 1 large page
2097c478bd9Sstevel@tonic-gate  * (2MB) below kernelbase.  The upper limit for a 32-bit user address space
2107c478bd9Sstevel@tonic-gate  * is 1 small page (4KB) below the top of the 32-bit range.  The 64-bit
2117c478bd9Sstevel@tonic-gate  * limit give dtrace the red zone it needs below kernelbase.  The 32-bit
2127c478bd9Sstevel@tonic-gate  * limit gives us a small red zone to detect address-space overruns in a
2137c478bd9Sstevel@tonic-gate  * user program.
214843e1988Sjohnlev  *
215843e1988Sjohnlev  * On the hypervisor, we limit the user to memory below the VA hole.
216843e1988Sjohnlev  * Subtract 1 large page for a red zone.
2177c478bd9Sstevel@tonic-gate  */
218843e1988Sjohnlev #if defined(__xpv)
219843e1988Sjohnlev #define	USERLIMIT	ADDRESS_C(0x00007fffffe00000)
220843e1988Sjohnlev #else
22104909c8cSJohn Levon #define	USERLIMIT	ADDRESS_C(0xfffffc7fffe00000)
222843e1988Sjohnlev #endif
2247c478bd9Sstevel@tonic-gate #ifdef bug_5074717_is_fixed
2257c478bd9Sstevel@tonic-gate #define	USERLIMIT32	ADDRESS_C(0xfffff000)
2267c478bd9Sstevel@tonic-gate #else
2277c478bd9Sstevel@tonic-gate #define	USERLIMIT32	ADDRESS_C(0xfefff000)
2287c478bd9Sstevel@tonic-gate #endif
230ae115bc7Smrj #if !defined(_ASM) && !defined(_KMDB)
231ae115bc7Smrj extern uintptr_t kernelbase, segmap_start, segmapsize;
2327c478bd9Sstevel@tonic-gate #endif
2347c478bd9Sstevel@tonic-gate /*
2357c478bd9Sstevel@tonic-gate  * ARGSBASE is the base virtual address of the range which
2367c478bd9Sstevel@tonic-gate  * the kernel uses to map the arguments for exec.
2377c478bd9Sstevel@tonic-gate  */
2387c478bd9Sstevel@tonic-gate #define	ARGSBASE	PROMSTART
2407c478bd9Sstevel@tonic-gate /*
2417c478bd9Sstevel@tonic-gate  * reserve space for modules
2427c478bd9Sstevel@tonic-gate  */
2437c478bd9Sstevel@tonic-gate #define	MODTEXT	(1024 * 1024 * 2)
2447c478bd9Sstevel@tonic-gate #define	MODDATA	(1024 * 300)
2467c478bd9Sstevel@tonic-gate /*
2477c478bd9Sstevel@tonic-gate  * The heap has a region allocated from it of HEAPTEXT_SIZE bytes specifically
2487c478bd9Sstevel@tonic-gate  * for module text.
2497c478bd9Sstevel@tonic-gate  */
2507c478bd9Sstevel@tonic-gate #define	HEAPTEXT_SIZE		(64 * 1024 * 1024)	/* bytes */
2527c478bd9Sstevel@tonic-gate /*
2537c478bd9Sstevel@tonic-gate  * Size of a kernel threads stack.  It must be a whole number of pages
2547c478bd9Sstevel@tonic-gate  * since the segment it comes from will only allocate space in pages.
2557c478bd9Sstevel@tonic-gate  */
2567c478bd9Sstevel@tonic-gate #define	T_STACKSZ	2*PAGESIZE
2587c478bd9Sstevel@tonic-gate /*
2597c478bd9Sstevel@tonic-gate  * Size of a cpu startup thread stack.  (It must be a whole number of pages
2607c478bd9Sstevel@tonic-gate  * since the containing segment only allocates space in pages.)
2617c478bd9Sstevel@tonic-gate  */
2637c478bd9Sstevel@tonic-gate #define	STARTUP_STKSZ	3*PAGESIZE
2657c478bd9Sstevel@tonic-gate /*
2667c478bd9Sstevel@tonic-gate  * Bus types
2677c478bd9Sstevel@tonic-gate  */
2687c478bd9Sstevel@tonic-gate #define	BTISA		1
2697c478bd9Sstevel@tonic-gate #define	BTEISA		2
2707c478bd9Sstevel@tonic-gate #define	BTMCA		3
2727c478bd9Sstevel@tonic-gate #ifdef	__cplusplus
2737c478bd9Sstevel@tonic-gate }
2747c478bd9Sstevel@tonic-gate #endif
2767c478bd9Sstevel@tonic-gate #endif	/* _SYS_MACHPARAM_H */