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268bdb43f9
level implementation stuff out of machine/globaldata.h to avoid exposing UPAGES to lots more places. The end result is that we can double the kernel stack size with 'options UPAGES=4' etc. This is mainly being done for the benefit of a MFC to RELENG_4 at some point. -current doesn't really need this so much since each interrupt runs on its own kstack.
50 lines
1.9 KiB
C
50 lines
1.9 KiB
C
/*-
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* Copyright (c) Peter Wemm <peter@netplex.com.au>
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* All rights reserved.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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* $FreeBSD$
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*/
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#ifndef _MACHINE_PRIVATESPACE_H_
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#define _MACHINE_PRIVATESPACE_H_
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/*
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* This is the upper (0xff800000) address space layout that is per-cpu.
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* It is setup in locore.s and pmap.c for the BSP and in mp_machdep.c for
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* each AP. This is only applicable to the x86 SMP kernel.
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*/
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struct privatespace {
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/* page 0 - data page */
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struct globaldata globaldata;
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char __filler0[PAGE_SIZE - sizeof(struct globaldata)];
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/* page 1 - idle stack (UPAGES pages) */
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char idlestack[UPAGES * PAGE_SIZE];
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/* page 1+UPAGES... */
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};
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extern struct privatespace SMP_prvspace[];
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#endif /* ! _MACHINE_PRIVATESPACE_H_ */
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