pexpert/i386/pe_spl.c

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