bsp/hal/ppc/arch/cpu.c

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This source file includes following definitions.
splhigh
spl0
splx
copyin
copyout
copyinstr
   1 /*-
   2  * Copyright (c) 2009, Kohsuke Ohtani
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the author nor the names of any co-contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29 
  30 /*
  31  * cpu.c - cpu dependent routines
  32  */
  33 
  34 #include <kernel.h>
  35 #include <cpu.h>
  36 #include <locore.h>
  37 #include <cpufunc.h>
  38 
  39 static int curspl = 15;
  40 
  41 int
  42 splhigh(void)
  43 {
  44         int oldspl = curspl;
  45 
  46         sploff();
  47         curspl = 15;
  48         return oldspl;
  49 }
  50 
  51 int
  52 spl0(void)
  53 {
  54         int oldspl = curspl;
  55 
  56         curspl = 0;
  57         splon();
  58         return oldspl;
  59 }
  60 
  61 void
  62 splx(int s)
  63 {
  64 
  65         curspl = s;
  66         if (curspl == 0)
  67                 splon();
  68         else
  69                 sploff();
  70 }
  71 
  72 
  73 int
  74 copyin(const void *uaddr, void *kaddr, size_t len)
  75 {
  76 
  77         if (user_area(uaddr) && user_area(uaddr + len)) {
  78                 memcpy(kaddr, uaddr, len);
  79                 return 0;
  80         }
  81         return EFAULT;
  82 }
  83 
  84 int
  85 copyout(const void *kaddr, void *uaddr, size_t len)
  86 {
  87 
  88         if (user_area(uaddr) && user_area(uaddr + len)) {
  89                 memcpy(uaddr, kaddr, len);
  90                 return 0;
  91         }
  92         return EFAULT;
  93 }
  94 
  95 int
  96 copyinstr(const void *uaddr, void *kaddr, size_t len)
  97 {
  98 
  99         if (user_area(uaddr) && user_area(uaddr + len)) {
 100                 strlcpy(kaddr, uaddr, len);
 101                 return 0;
 102         }
 103         return EFAULT;
 104 }
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root/bsp/hal/ppc/arch/cpu.c

DEFINITIONS
