mirror of
https://codeberg.org/ziglang/zig.git
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Alex Rønne Petersen
66d97267c7
This excludes all headers in /usr/include/dev because that directory is bonkers huge (18M). We can add these on an as-needed basis.
114 lines
3.7 KiB
C
Vendored
114 lines
3.7 KiB
C
Vendored
/* $OpenBSD: vmparam.h,v 1.25 2024/11/08 01:44:52 jsg Exp $ */
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/* $NetBSD: vmparam.h,v 1.1 2003/04/26 18:39:49 fvdl Exp $ */
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/*-
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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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* 3. 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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* @(#)vmparam.h 5.9 (Berkeley) 5/12/91
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*/
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#ifndef _MACHINE_VMPARAM_H_
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#define _MACHINE_VMPARAM_H_
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/*
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* Machine dependent constants for amd64.
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*/
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/*
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* USRSTACK is the top (end) of the user stack. Immediately above the
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* user stack resides the user structure, which is UPAGES long and contains
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* the kernel stack.
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*
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* Immediately after the user structure is the page table map, and then
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* kernel address space.
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*/
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#define USRSTACK VM_MAXUSER_ADDRESS
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/*
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* Virtual memory related constants, all in bytes
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*/
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#define MAXTSIZ ((paddr_t)256*1024*1024) /* max text size */
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#ifndef DFLDSIZ
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#define DFLDSIZ ((paddr_t)128*1024*1024) /* initial data size limit */
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#endif
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#ifndef MAXDSIZ
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#define MAXDSIZ ((paddr_t)128*1024*1024*1024) /* max data size */
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#endif
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#ifndef BRKSIZ
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#define BRKSIZ ((paddr_t)8*1024*1024*1024) /* heap gap size */
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#endif
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#ifndef DFLSSIZ
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#define DFLSSIZ ((paddr_t)2*1024*1024) /* initial stack size limit */
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#endif
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#ifndef MAXSSIZ
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#define MAXSSIZ ((paddr_t)32*1024*1024) /* max stack size */
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#endif
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#define STACKGAP_RANDOM 256*1024
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/*
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* Size of shared memory map
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*/
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#ifndef SHMMAXPGS
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#define SHMMAXPGS 8192
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#endif
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/*
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* Size of User Raw I/O map
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*/
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#define USRIOSIZE 300
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/*
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* Mach derived constants
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*/
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/* user/kernel map constants */
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#define VM_MIN_ADDRESS PAGE_SIZE
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#define VM_MAXUSER_ADDRESS 0x00007f7fffffc000
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#define VM_MAX_ADDRESS 0x00007fbfdfeff000
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#ifdef _KERNEL
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#define VM_MIN_STACK_ADDRESS 0x0000600000000000
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#endif
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#define VM_MIN_KERNEL_ADDRESS 0xffff800000000000
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#define VM_MAX_KERNEL_ADDRESS 0xffff800100000000
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/* map PIE into approximately the first quarter of user va space */
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#define VM_PIE_MIN_ADDR VM_MIN_ADDRESS
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#define VM_PIE_MAX_ADDR 0x200000000000
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/* virtual sizes (bytes) for various kernel submaps */
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#define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE)
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#define VM_PHYSSEG_MAX 16 /* actually we could have this many segments */
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#define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST
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#define VM_PHYSSEG_NOADD /* can't add RAM after vm_mem_init */
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#endif /* _MACHINE_VMPARAM_H_ */ |