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NetBSD/sys/uvm/uvm_swap.h

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Move swapctl(SWAP_STATS) implementation to a separate function called uvm_swap_stats(). This is done in order to allow COMPAT_* swapctl() emulation to use it directly without going through sys_swapctl(). The problem with using sys_swapctl() there is that it involves copying the swapent array to the stackgap, and this array's size is not known at build time. Hence it would not be possible to ensure it would fit in the stackgap in any case.
2002-03-18 14:43:01 +03:00
/* $NetBSD: uvm_swap.h,v 1.6 2002/03/18 11:43:01 manu Exp $ */
initial import of the new virtual memory system, UVM, into -current. UVM was written by chuck cranor <chuck@maria.wustl.edu>, with some minor portions derived from the old Mach code. i provided some help getting swap and paging working, and other bug fixes/ideas. chuck silvers <chuq@chuq.com> also provided some other fixes. this is the UVM kernel code portion. this will be KNF'd shortly. :-)
1998-02-05 09:25:08 +03:00
/*
* Copyright (c) 1997 Matthew R. Green
* All rights reserved.
*
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
restore rcsids
1998-02-07 14:07:38 +03:00
*
* from: Id: uvm_swap.h,v 1.1.2.6 1997/12/15 05:39:31 mrg Exp
initial import of the new virtual memory system, UVM, into -current. UVM was written by chuck cranor <chuck@maria.wustl.edu>, with some minor portions derived from the old Mach code. i provided some help getting swap and paging working, and other bug fixes/ideas. chuck silvers <chuq@chuq.com> also provided some other fixes. this is the UVM kernel code portion. this will be KNF'd shortly. :-)
1998-02-05 09:25:08 +03:00
*/
#ifndef _UVM_UVM_SWAP_H_
#define _UVM_UVM_SWAP_H_
add support for ``swapctl -d'' (removing swap space). improve handling of i/o errors in swap space. reviewed by: Chuck Cranor
2000-01-11 09:57:49 +03:00
#define SWSLOT_BAD (-1)
Protect prototypes, certain macros, and inlines from userland.
1999-06-21 21:25:11 +04:00
#ifdef _KERNEL
Move swapctl(SWAP_STATS) implementation to a separate function called uvm_swap_stats(). This is done in order to allow COMPAT_* swapctl() emulation to use it directly without going through sys_swapctl(). The problem with using sys_swapctl() there is that it involves copying the swapent array to the stackgap, and this array's size is not known at build time. Hence it would not be possible to ensure it would fit in the stackgap in any case.
2002-03-18 14:43:01 +03:00
struct swapent;
initial import of the new virtual memory system, UVM, into -current. UVM was written by chuck cranor <chuck@maria.wustl.edu>, with some minor portions derived from the old Mach code. i provided some help getting swap and paging working, and other bug fixes/ideas. chuck silvers <chuq@chuq.com> also provided some other fixes. this is the UVM kernel code portion. this will be KNF'd shortly. :-)
1998-02-05 09:25:08 +03:00
int uvm_swap_get __P((struct vm_page *, int, int));
add support for ``swapctl -d'' (removing swap space). improve handling of i/o errors in swap space. reviewed by: Chuck Cranor
2000-01-11 09:57:49 +03:00
int uvm_swap_put __P((int, struct vm_page **, int, int));
int uvm_swap_alloc __P((int *, boolean_t));
void uvm_swap_free __P((int, int));
void uvm_swap_markbad __P((int, int));
Move swapctl(SWAP_STATS) implementation to a separate function called uvm_swap_stats(). This is done in order to allow COMPAT_* swapctl() emulation to use it directly without going through sys_swapctl(). The problem with using sys_swapctl() there is that it involves copying the swapent array to the stackgap, and this array's size is not known at build time. Hence it would not be possible to ensure it would fit in the stackgap in any case.
2002-03-18 14:43:01 +03:00
void uvm_swap_stats __P((int, struct swapent *,
int, register_t *));
initial import of the new virtual memory system, UVM, into -current. UVM was written by chuck cranor <chuck@maria.wustl.edu>, with some minor portions derived from the old Mach code. i provided some help getting swap and paging working, and other bug fixes/ideas. chuck silvers <chuq@chuq.com> also provided some other fixes. this is the UVM kernel code portion. this will be KNF'd shortly. :-)
1998-02-05 09:25:08 +03:00
Protect prototypes, certain macros, and inlines from userland.
1999-06-21 21:25:11 +04:00
#endif /* _KERNEL */
initial import of the new virtual memory system, UVM, into -current. UVM was written by chuck cranor <chuck@maria.wustl.edu>, with some minor portions derived from the old Mach code. i provided some help getting swap and paging working, and other bug fixes/ideas. chuck silvers <chuq@chuq.com> also provided some other fixes. this is the UVM kernel code portion. this will be KNF'd shortly. :-)
1998-02-05 09:25:08 +03:00
#endif /* _UVM_UVM_SWAP_H_ */