pexpert/i386/pe_spl.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_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. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 #include <pexpert/protos.h>
  29
  30
  31 typedef unsigned long   spl_t;
  32
  33 spl_t   PE_set_spl(spl_t x);
  34
  35 spl_t splhi() { return PE_set_spl(8); }
  36 spl_t splhigh() { return PE_set_spl(8); }
  37 spl_t splclock() { return PE_set_spl(8); }
  38 spl_t splvm() { return PE_set_spl(8); }
  39 spl_t splsched() { return       PE_set_spl(8); }
  40 spl_t splimp()  { return PE_set_spl(6); }
  41 void    splx(spl_t x) { (void) PE_set_spl(x); }
  42 spl_t splnet() { return PE_set_spl(6); }
  43 void  spllo() { (void) PE_set_spl(0); }
  44 spl_t spl1() { return PE_set_spl(1); }
  45 spl_t spl2() { return PE_set_spl(2); }
  46 spl_t spl3() { return PE_set_spl(3); }
  47 spl_t spl4() { return PE_set_spl(4); }
  48 spl_t spl5() { return PE_set_spl(5); }
  49 spl_t spl6() { return PE_set_spl(6); }
  50 spl_t splbio() { return PE_set_spl(5); }
  51 spl_t spltty() { return PE_set_spl(6); }
  52
  53 spl_t sploff() { return PE_set_spl(8); }
  54 void splon(spl_t x) { (void) PE_set_spl(x); }
  55
  56 spl_t PE_set_spl(spl_t lvl)
  57 {
  58   spl_t old_level;
  59   int   mycpu;
  60
  61
  62   __asm__ volatile("cli");
  63
  64   mycpu = cpu_number();
  65   old_level = cpu_data[mycpu].spl_level;
  66   cpu_data[mycpu].spl_level = lvl ;
  67
  68   if (!lvl) __asm__ volatile("sti");
  69
  70   return old_level;
  71 }
  72
  73 void PE_set_spl_no_interrupt(spl_t lvl)
  74 {
  75   int mycpu;
  76
  77   __asm__ volatile("cli");
  78
  79   mycpu = cpu_number();
  80   cpu_data[mycpu].spl_level = lvl ;
  81
  82   return;
  83 }
  84