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Diffstat (limited to 'usr/src/boot/sys/i386/include/param.h')
| -rw-r--r-- | usr/src/boot/sys/i386/include/param.h | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/usr/src/boot/sys/i386/include/param.h b/usr/src/boot/sys/i386/include/param.h new file mode 100644 index 0000000000..f7968f8308 --- /dev/null +++ b/usr/src/boot/sys/i386/include/param.h @@ -0,0 +1,168 @@ +/*- + * Copyright (c) 1990 The Regents of the University of California. + * All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * William Jolitz. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * from: @(#)param.h 5.8 (Berkeley) 6/28/91 + * $FreeBSD$ + */ + + +#ifndef _I386_INCLUDE_PARAM_H_ +#define _I386_INCLUDE_PARAM_H_ + +#include <machine/_align.h> + +/* + * Machine dependent constants for Intel 386. + */ + + +#define __HAVE_ACPI +#define __HAVE_PIR +#define __PCI_REROUTE_INTERRUPT + +#ifndef MACHINE +#define MACHINE "i386" +#endif +#ifndef MACHINE_ARCH +#define MACHINE_ARCH "i386" +#endif +#define MID_MACHINE MID_I386 + +#if defined(SMP) || defined(KLD_MODULE) +#ifndef MAXCPU +#define MAXCPU 32 +#endif +#else +#define MAXCPU 1 +#endif /* SMP || KLD_MODULE */ + +#ifndef MAXMEMDOM +#define MAXMEMDOM 1 +#endif + +#define ALIGNBYTES _ALIGNBYTES +#define ALIGN(p) _ALIGN(p) +/* + * ALIGNED_POINTER is a boolean macro that checks whether an address + * is valid to fetch data elements of type t from on this architecture. + * This does not reflect the optimal alignment, just the possibility + * (within reasonable limits). + */ +#define ALIGNED_POINTER(p, t) 1 + +/* + * CACHE_LINE_SIZE is the compile-time maximum cache line size for an + * architecture. It should be used with appropriate caution. + */ +#define CACHE_LINE_SHIFT 7 +#define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT) + +#define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */ +#define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */ +#define PAGE_MASK (PAGE_SIZE-1) +#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) + +#if defined(PAE) || defined(PAE_TABLES) +#define NPGPTD 4 +#define PDRSHIFT 21 /* LOG2(NBPDR) */ +#define NPGPTD_SHIFT 9 +#else +#define NPGPTD 1 +#define PDRSHIFT 22 /* LOG2(NBPDR) */ +#define NPGPTD_SHIFT 10 +#endif + +#define NBPTD (NPGPTD<<PAGE_SHIFT) +#define NPDEPTD (NBPTD/(sizeof (pd_entry_t))) +#define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t))) +#define NBPDR (1<<PDRSHIFT) /* bytes/page dir */ +#define PDRMASK (NBPDR-1) + +#define MAXPAGESIZES 2 /* maximum number of supported page sizes */ + +#define IOPAGES 2 /* pages of i/o permission bitmap */ + +#ifndef KSTACK_PAGES +#define KSTACK_PAGES 2 /* Includes pcb! */ +#endif +#define KSTACK_GUARD_PAGES 1 /* pages of kstack guard; 0 disables */ +#if KSTACK_PAGES < 4 +#define TD0_KSTACK_PAGES 4 +#else +#define TD0_KSTACK_PAGES KSTACK_PAGES +#endif + +/* + * Ceiling on amount of swblock kva space, can be changed via + * the kern.maxswzone /boot/loader.conf variable. + * + * 276 is sizeof(struct swblock), but we do not always have a definition + * in scope for struct swblock, so we have to hardcode it. Each struct + * swblock holds metadata for 32 pages, so in theory, this is enough for + * 16 GB of swap. In practice, however, the usable amount is considerably + * lower due to fragmentation. + */ +#ifndef VM_SWZONE_SIZE_MAX +#define VM_SWZONE_SIZE_MAX (276 * 128 * 1024) +#endif + +/* + * Ceiling on size of buffer cache (really only effects write queueing, + * the VM page cache is not effected), can be changed via + * the kern.maxbcache /boot/loader.conf variable. + * + * The value is equal to the size of the auto-tuned buffer map for + * the machine with 4GB of RAM, see vfs_bio.c:kern_vfs_bio_buffer_alloc(). + */ +#ifndef VM_BCACHE_SIZE_MAX +#define VM_BCACHE_SIZE_MAX (7224 * 16 * 1024) +#endif + +/* + * Mach derived conversion macros + */ +#define trunc_page(x) ((x) & ~PAGE_MASK) +#define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK) +#define trunc_4mpage(x) ((x) & ~PDRMASK) +#define round_4mpage(x) ((((x)) + PDRMASK) & ~PDRMASK) + +#define atop(x) ((x) >> PAGE_SHIFT) +#define ptoa(x) ((x) << PAGE_SHIFT) + +#define i386_btop(x) ((x) >> PAGE_SHIFT) +#define i386_ptob(x) ((x) << PAGE_SHIFT) + +#define pgtok(x) ((x) * (PAGE_SIZE / 1024)) + +#define INKERNEL(va) (((vm_offset_t)(va)) >= VM_MAXUSER_ADDRESS && \ + ((vm_offset_t)(va)) < VM_MAX_KERNEL_ADDRESS) + +#endif /* !_I386_INCLUDE_PARAM_H_ */ |