pexpert/i386/pe_spl.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 #include <pexpert/protos.h>
  23
  24
  25 typedef unsigned long   spl_t;
  26
  27 spl_t   PE_set_spl(spl_t x);
  28
  29 spl_t splhi() { return PE_set_spl(8); }
  30 spl_t splhigh() { return PE_set_spl(8); }
  31 spl_t splclock() { return PE_set_spl(8); }
  32 spl_t splvm() { return PE_set_spl(8); }
  33 spl_t splsched() { return       PE_set_spl(8); }
  34 spl_t splimp()  { return PE_set_spl(6); }
  35 void    splx(spl_t x) { (void) PE_set_spl(x); }
  36 spl_t splnet() { return PE_set_spl(6); }
  37 void  spllo() { (void) PE_set_spl(0); }
  38 spl_t spl1() { return PE_set_spl(1); }
  39 spl_t spl2() { return PE_set_spl(2); }
  40 spl_t spl3() { return PE_set_spl(3); }
  41 spl_t spl4() { return PE_set_spl(4); }
  42 spl_t spl5() { return PE_set_spl(5); }
  43 spl_t spl6() { return PE_set_spl(6); }
  44 spl_t splbio() { return PE_set_spl(5); }
  45 spl_t spltty() { return PE_set_spl(6); }
  46
  47 spl_t sploff() { return PE_set_spl(8); }
  48 void splon(spl_t x) { (void) PE_set_spl(x); }
  49
  50 spl_t PE_set_spl(spl_t lvl)
  51 {
  52   spl_t old_level;
  53   int   mycpu;
  54
  55
  56   __asm__ volatile("cli");
  57
  58   mycpu = cpu_number();
  59   old_level = cpu_data[mycpu].spl_level;
  60   cpu_data[mycpu].spl_level = lvl ;
  61
  62   if (!lvl) __asm__ volatile("sti");
  63
  64   return old_level;
  65 }
  66
  67 void PE_set_spl_no_interrupt(spl_t lvl)
  68 {
  69   int mycpu;
  70
  71   __asm__ volatile("cli");
  72
  73   mycpu = cpu_number();
  74   cpu_data[mycpu].spl_level = lvl ;
  75
  76   return;
  77 }
  78