kernel/arch/ia64/include/cpu.h

   1 /*
   2  * Copyright (c) 2005 Jakub Jermar
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * - Redistributions of source code must retain the above copyright
  10  *   notice, this list of conditions and the following disclaimer.
  11  * - Redistributions in binary form must reproduce the above copyright
  12  *   notice, this list of conditions and the following disclaimer in the
  13  *   documentation and/or other materials provided with the distribution.
  14  * - The name of the author may not be used to endorse or promote products
  15  *   derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 /** @addtogroup ia64
  30  * @{
  31  */
  32 /** @file
  33  */
  34
  35 #ifndef KERN_ia64_CPU_H_
  36 #define KERN_ia64_CPU_H_
  37
  38 #include <arch/types.h>
  39 #include <typedefs.h>
  40 #include <arch/register.h>
  41
  42 #define FAMILY_ITANIUM  0x7
  43 #define FAMILY_ITANIUM2 0x1f
  44
  45 struct cpu_arch {
  46         uint64_t cpuid0;
  47         uint64_t cpuid1;
  48         cpuid3_t cpuid3;
  49 };
  50
  51 /** Read CPUID register.
  52  *
  53  * @param n CPUID register number.
  54  *
  55  * @return Value of CPUID[n] register.
  56  */
  57 static inline uint64_t cpuid_read(int n)
  58 {
  59         uint64_t v;
  60
  61         __asm__ volatile ("mov %0 = cpuid[%1]\n" : "=r" (v) : "r" (n));
  62
  63         return v;
  64 }
  65
  66 #endif
  67
  68 /** @}
  69  */