pexpert/i386/pe_spl.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 #include <pexpert/protos.h>
  26
  27
  28 typedef unsigned long   spl_t;
  29
  30 spl_t   PE_set_spl(spl_t x);
  31
  32 spl_t splhi() { return PE_set_spl(8); }
  33 spl_t splhigh() { return PE_set_spl(8); }
  34 spl_t splclock() { return PE_set_spl(8); }
  35 spl_t splvm() { return PE_set_spl(8); }
  36 spl_t splsched() { return       PE_set_spl(8); }
  37 spl_t splimp()  { return PE_set_spl(6); }
  38 void    splx(spl_t x) { (void) PE_set_spl(x); }
  39 spl_t splnet() { return PE_set_spl(6); }
  40 void  spllo() { (void) PE_set_spl(0); }
  41 spl_t spl1() { return PE_set_spl(1); }
  42 spl_t spl2() { return PE_set_spl(2); }
  43 spl_t spl3() { return PE_set_spl(3); }
  44 spl_t spl4() { return PE_set_spl(4); }
  45 spl_t spl5() { return PE_set_spl(5); }
  46 spl_t spl6() { return PE_set_spl(6); }
  47 spl_t splbio() { return PE_set_spl(5); }
  48 spl_t spltty() { return PE_set_spl(6); }
  49
  50 spl_t sploff() { return PE_set_spl(8); }
  51 void splon(spl_t x) { (void) PE_set_spl(x); }
  52
  53 spl_t PE_set_spl(spl_t lvl)
  54 {
  55   spl_t old_level;
  56   int   mycpu;
  57
  58
  59   __asm__ volatile("cli");
  60
  61   mycpu = cpu_number();
  62   old_level = cpu_data[mycpu].spl_level;
  63   cpu_data[mycpu].spl_level = lvl ;
  64
  65   if (!lvl) __asm__ volatile("sti");
  66
  67   return old_level;
  68 }
  69
  70 void PE_set_spl_no_interrupt(spl_t lvl)
  71 {
  72   int mycpu;
  73
  74   __asm__ volatile("cli");
  75
  76   mycpu = cpu_number();
  77   cpu_data[mycpu].spl_level = lvl ;
  78
  79   return;
  80 }
  81