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author | obrien <obrien@FreeBSD.org> | 2002-06-30 07:42:36 +0000 |
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committer | obrien <obrien@FreeBSD.org> | 2002-06-30 07:42:36 +0000 |
commit | 437dcf4e4331f1e9a6a091a46fcc8b136c257b01 (patch) | |
tree | 8d2791bedb28b9d9c90901ffcc0fc35cfd361e7c /sys/amd64/include/param.h | |
parent | 2a63999c33e096f622d09b913313a859579498d7 (diff) | |
download | FreeBSD-src-437dcf4e4331f1e9a6a091a46fcc8b136c257b01.zip FreeBSD-src-437dcf4e4331f1e9a6a091a46fcc8b136c257b01.tar.gz |
This is the start of the FreeBSD/x86_64 kernel.
Diffstat (limited to 'sys/amd64/include/param.h')
-rw-r--r-- | sys/amd64/include/param.h | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/sys/amd64/include/param.h b/sys/amd64/include/param.h new file mode 100644 index 0000000..a6ab20c --- /dev/null +++ b/sys/amd64/include/param.h @@ -0,0 +1,138 @@ +/* + * Copyright (c) 2002 David E. O'Brien. All rights reserved. + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * the Systems Programming Group of the University of Utah Computer + * Science Department and Ralph Campbell. + * + * 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 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. + * + * @(#)param.h 8.1 (Berkeley) 6/10/93 + * $FreeBSD$ + */ + +/* + * Machine dependent constants for the AMD x86-64. + */ + +/* + * Round p (pointer or byte index) up to a correctly-aligned value + * for all data types (int, long, ...). The result is u_long and + * must be cast to any desired pointer type. + * + * 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). + * + */ +#ifndef _ALIGNBYTES +#define _ALIGNBYTES (sizeof(int) - 1) +#endif +#ifndef _ALIGN +#define _ALIGN(p) (((u_long)(p) + _ALIGNBYTES) &~ _ALIGNBYTES) +#endif +#ifndef _ALIGNED_POINTER +#define _ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) +#endif + +#ifndef _MACHINE +#define _MACHINE x86_64 +#endif +#ifndef _MACHINE_ARCH +#define _MACHINE_ARCH x86_64 +#endif + +#ifndef _NO_NAMESPACE_POLLUTION + +#ifndef _MACHINE_PARAM_H_ +#define _MACHINE_PARAM_H_ + +#ifndef MACHINE +#define MACHINE "x86_64" +#endif +#ifndef MACHINE_ARCH +#define MACHINE_ARCH "x86_64" +#endif +#define MID_MACHINE MID_X86_64 + +/* + * OBJFORMAT_NAMES is a comma-separated list of the object formats + * that are supported on the architecture. + */ +#define OBJFORMAT_NAMES "elf" +#define OBJFORMAT_DEFAULT "elf" + +#ifdef SMP +#define MAXCPU 16 +#else +#define MAXCPU 1 +#endif /* SMP */ + +#define ALIGNBYTES _ALIGNBYTES +#define ALIGN(p) _ALIGN(p) +#define ALIGNED_POINTER(p,t) _ALIGNED_POINTER((p),(t)) + +#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))) + +#define KERNBASE 0x0000000000000000LL /* start of kernel virtual */ +#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) + +#define IOPAGES 2 /* pages of i/o permission bitmap */ + +#ifndef KSTACK_PAGES +#define KSTACK_PAGES 2 /* pages of kstack (with pcb) */ +#endif +#define UAREA_PAGES 1 /* holds struct user WITHOUT PCB (see def.) */ + +#define KSTACK_GUARD 1 /* compile in the kstack guard page */ + +/* + * Mach derived conversion macros + */ +#define round_page(x) ((((unsigned long)(x)) + PAGE_MASK) & ~(PAGE_MASK)) +#define trunc_page(x) ((unsigned long)(x) & ~(PAGE_MASK)) +#define trunc_4mpage(x) ((unsigned)(x) & ~PDRMASK) +#define round_4mpage(x) ((((unsigned)(x)) + PDRMASK) & ~PDRMASK) + +#define atop(x) ((unsigned long)(x) >> PAGE_SHIFT) +#define ptoa(x) ((unsigned long)(x) << PAGE_SHIFT) + +#define x86_64_btop(x) ((unsigned long)(x) >> PAGE_SHIFT) +#define x86_64_ptob(x) ((unsigned long)(x) << PAGE_SHIFT) + +#define pgtok(x) ((x) * (PAGE_SIZE / 1024)) + +#endif /* !_MACHINE_PARAM_H_ */ +#endif /* !_NO_NAMESPACE_POLLUTION */ |