The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/ras.h

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    1 /*      $NetBSD: ras.h,v 1.3 2004/03/03 21:05:30 thorpej Exp $  */
    2 
    3 /*-
    4  * Copyright (c) 2002, 2004 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by Gregory McGarry.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 3. All advertising materials mentioning features or use of this software
   19  *    must display the following acknowledgement:
   20  *        This product includes software developed by the NetBSD
   21  *        Foundation, Inc. and its contributors.
   22  * 4. Neither the name of The NetBSD Foundation nor the names of its
   23  *    contributors may be used to endorse or promote products derived
   24  *    from this software without specific prior written permission.
   25  *
   26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   36  * POSSIBILITY OF SUCH DAMAGE.
   37  */
   38 
   39 #ifndef _SYS_RAS_H_
   40 #define _SYS_RAS_H_
   41 
   42 #include <sys/types.h>
   43 #include <sys/queue.h>
   44 
   45 struct ras {
   46         LIST_ENTRY(ras) ras_list;
   47         caddr_t ras_startaddr;
   48         caddr_t ras_endaddr;
   49         int ras_hits;
   50 };
   51 
   52 #define RAS_INSTALL             0
   53 #define RAS_PURGE               1
   54 #define RAS_PURGE_ALL           2
   55 
   56 #ifdef _KERNEL
   57 
   58 struct pool;
   59 struct proc;
   60 
   61 caddr_t ras_lookup(struct proc *, caddr_t);
   62 
   63 int ras_fork(struct proc *, struct proc *);
   64 int ras_purgeall(struct proc *);
   65 
   66 extern struct pool ras_pool;
   67 
   68 #else
   69 
   70 #define RAS_DECL(name)                                                  \
   71 extern void __CONCAT(name,_ras_start(void)), __CONCAT(name,_ras_end(void))
   72 
   73 /*
   74  * RAS_START and RAS_END contain implicit instruction reordering
   75  * barriers.  See __insn_barrier() in <sys/cdefs.h>.
   76  */
   77 #define RAS_START(name)                                                 \
   78         __asm __volatile(".globl " ___STRING(name) "_ras_start\n"       \
   79                          ___STRING(name) "_ras_start:"                  \
   80             ::: "memory")
   81 
   82 #define RAS_END(name)                                                   \
   83         __asm __volatile(".globl " ___STRING(name) "_ras_end\n"         \
   84                          ___STRING(name) "_ras_end:"                    \
   85             ::: "memory")
   86 
   87 #define RAS_ADDR(name)  (void *) __CONCAT(name,_ras_start)
   88 #define RAS_SIZE(name)  ((size_t)((uintptr_t) __CONCAT(name,_ras_end) - \
   89                                   (uintptr_t) __CONCAT(name,_ras_start)))
   90 
   91 __BEGIN_DECLS
   92 int rasctl(caddr_t, size_t, int);
   93 __END_DECLS
   94 
   95 #endif /* _KERNEL */
   96 
   97 #endif /* !_SYS_RAS_H_ */

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