xnu-792.12.6.tar.gz

[apple/xnu.git] / pexpert / i386 / pe_spl.c

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code 
 * as defined in and that are subject to the Apple Public Source License 
 * Version 2.0 (the 'License'). You may not use this file except in 
 * compliance with the License.  The rights granted to you under the 
 * License may not be used to create, or enable the creation or 
 * redistribution of, unlawful or unlicensed copies of an Apple operating 
 * system, or to circumvent, violate, or enable the circumvention or 
 * violation of, any terms of an Apple operating system software license 
 * agreement.
 *
 * Please obtain a copy of the License at 
 * http://www.opensource.apple.com/apsl/ and read it before using this 
 * file.
 *
 * The Original Code and all software distributed under the License are 
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
 * Please see the License for the specific language governing rights and 
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 */
#include <pexpert/protos.h>


typedef unsigned long	spl_t;

spl_t	PE_set_spl(spl_t x);

spl_t splhi() { return PE_set_spl(8); }
spl_t splhigh() { return PE_set_spl(8); }
spl_t splclock() { return PE_set_spl(8); }
spl_t splvm() { return PE_set_spl(8); }
spl_t splsched() { return 	PE_set_spl(8); }
spl_t splimp()	{ return PE_set_spl(6); }
void	splx(spl_t x) { (void) PE_set_spl(x); }
spl_t splnet() { return PE_set_spl(6); }
void  spllo() { (void) PE_set_spl(0); }
spl_t spl1() { return PE_set_spl(1); }
spl_t spl2() { return PE_set_spl(2); }
spl_t spl3() { return PE_set_spl(3); }
spl_t spl4() { return PE_set_spl(4); }
spl_t spl5() { return PE_set_spl(5); }
spl_t spl6() { return PE_set_spl(6); }
spl_t splbio() { return	PE_set_spl(5); }
spl_t spltty() { return	PE_set_spl(6); }

spl_t sploff() { return PE_set_spl(8); }
void splon(spl_t x) { (void) PE_set_spl(x); }

spl_t PE_set_spl(spl_t lvl)
{
  spl_t old_level;
  int   mycpu;

  
  __asm__ volatile("cli");

  mycpu = cpu_number();
  old_level = cpu_data[mycpu].spl_level;
  cpu_data[mycpu].spl_level = lvl ;
  
  if (!lvl) __asm__ volatile("sti");
  
  return old_level;
}

void PE_set_spl_no_interrupt(spl_t lvl)
{
  int mycpu;

  __asm__ volatile("cli");

  mycpu = cpu_number();
  cpu_data[mycpu].spl_level = lvl ;

  return;
}