3208d3ff46
overflows the stack during root mount in some configurations. Tested by: Fabian Keil <freebsd-listen@fabiankeil.de> (previous version) Sponsored by: The FreeBSD Foundation MFC after: 2 weeks
169 lines
5.2 KiB
C
169 lines
5.2 KiB
C
/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)param.h 5.8 (Berkeley) 6/28/91
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* $FreeBSD$
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*/
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#ifndef _I386_INCLUDE_PARAM_H_
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#define _I386_INCLUDE_PARAM_H_
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#include <machine/_align.h>
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/*
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* Machine dependent constants for Intel 386.
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*/
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#define __HAVE_ACPI
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#define __HAVE_PIR
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#define __PCI_REROUTE_INTERRUPT
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#ifndef MACHINE
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#define MACHINE "i386"
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#endif
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#ifndef MACHINE_ARCH
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#define MACHINE_ARCH "i386"
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#endif
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#define MID_MACHINE MID_I386
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#if defined(SMP) || defined(KLD_MODULE)
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#ifndef MAXCPU
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#define MAXCPU 32
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#endif
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#else
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#define MAXCPU 1
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#endif /* SMP || KLD_MODULE */
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#ifndef MAXMEMDOM
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#define MAXMEMDOM 1
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#endif
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#define ALIGNBYTES _ALIGNBYTES
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#define ALIGN(p) _ALIGN(p)
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/*
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* ALIGNED_POINTER is a boolean macro that checks whether an address
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* is valid to fetch data elements of type t from on this architecture.
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* This does not reflect the optimal alignment, just the possibility
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* (within reasonable limits).
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*/
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#define ALIGNED_POINTER(p, t) 1
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/*
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* CACHE_LINE_SIZE is the compile-time maximum cache line size for an
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* architecture. It should be used with appropriate caution.
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*/
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#define CACHE_LINE_SHIFT 7
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#define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT)
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#define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */
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#define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */
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#define PAGE_MASK (PAGE_SIZE-1)
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#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t)))
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#if defined(PAE) || defined(PAE_TABLES)
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#define NPGPTD 4
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#define PDRSHIFT 21 /* LOG2(NBPDR) */
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#define NPGPTD_SHIFT 9
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#else
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#define NPGPTD 1
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#define PDRSHIFT 22 /* LOG2(NBPDR) */
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#define NPGPTD_SHIFT 10
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#endif
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#define NBPTD (NPGPTD<<PAGE_SHIFT)
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#define NPDEPTD (NBPTD/(sizeof (pd_entry_t)))
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#define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t)))
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#define NBPDR (1<<PDRSHIFT) /* bytes/page dir */
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#define PDRMASK (NBPDR-1)
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#define MAXPAGESIZES 2 /* maximum number of supported page sizes */
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#define IOPAGES 2 /* pages of i/o permission bitmap */
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#ifndef KSTACK_PAGES
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#define KSTACK_PAGES 2 /* Includes pcb! */
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#endif
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#define KSTACK_GUARD_PAGES 1 /* pages of kstack guard; 0 disables */
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#if KSTACK_PAGES < 4
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#define TD0_KSTACK_PAGES 4
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#else
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#define TD0_KSTACK_PAGES KSTACK_PAGES
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#endif
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/*
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* Ceiling on amount of swblock kva space, can be changed via
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* the kern.maxswzone /boot/loader.conf variable.
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*
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* 276 is sizeof(struct swblock), but we do not always have a definition
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* in scope for struct swblock, so we have to hardcode it. Each struct
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* swblock holds metadata for 32 pages, so in theory, this is enough for
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* 16 GB of swap. In practice, however, the usable amount is considerably
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* lower due to fragmentation.
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*/
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#ifndef VM_SWZONE_SIZE_MAX
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#define VM_SWZONE_SIZE_MAX (276 * 128 * 1024)
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#endif
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/*
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* Ceiling on size of buffer cache (really only effects write queueing,
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* the VM page cache is not effected), can be changed via
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* the kern.maxbcache /boot/loader.conf variable.
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*
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* The value is equal to the size of the auto-tuned buffer map for
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* the machine with 4GB of RAM, see vfs_bio.c:kern_vfs_bio_buffer_alloc().
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*/
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#ifndef VM_BCACHE_SIZE_MAX
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#define VM_BCACHE_SIZE_MAX (7224 * 16 * 1024)
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#endif
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/*
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* Mach derived conversion macros
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*/
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#define trunc_page(x) ((x) & ~PAGE_MASK)
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#define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK)
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#define trunc_4mpage(x) ((x) & ~PDRMASK)
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#define round_4mpage(x) ((((x)) + PDRMASK) & ~PDRMASK)
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#define atop(x) ((x) >> PAGE_SHIFT)
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#define ptoa(x) ((x) << PAGE_SHIFT)
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#define i386_btop(x) ((x) >> PAGE_SHIFT)
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#define i386_ptob(x) ((x) << PAGE_SHIFT)
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#define pgtok(x) ((x) * (PAGE_SIZE / 1024))
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#define INKERNEL(va) (((vm_offset_t)(va)) >= VM_MAXUSER_ADDRESS && \
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((vm_offset_t)(va)) < VM_MAX_KERNEL_ADDRESS)
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#endif /* !_I386_INCLUDE_PARAM_H_ */
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