cp/include/cpu.h

   1 /*
   2  * (C) Copyright 2007-2010  Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
   3  *
   4  * This file is released under the GPLv2.  See the COPYING file for more
   5  * details.
   6  */
   7
   8 #ifndef __CPU_H
   9 #define __CPU_H
  10
  11 static inline u64 getcpuid()
  12 {
  13         u64 cpuid = ~0;
  14
  15         asm("stidp      0(%1)\n"
  16         : /* output */
  17           "=m" (cpuid)
  18         : /* input */
  19           "a" (&cpuid)
  20         );
  21
  22         return cpuid;
  23 }
  24
  25 static inline u16 getcpuaddr()
  26 {
  27         u16 cpuaddr = ~0;
  28
  29         asm("stap       0(%1)\n"
  30         : /* output */
  31           "=m" (cpuaddr)
  32         : /* input */
  33           "a" (&cpuaddr)
  34         );
  35
  36         return cpuaddr;
  37 }
  38
  39 #define BIT64(x)        (1u << (63-(x)))
  40 #define BIT32(x)        (1u << (31-(x)))
  41
  42 #define set_cr(cr, val)                                         \
  43         do {                                                    \
  44                 u64 lval = (val);                               \
  45                 asm volatile(                                   \
  46                         "lctlg  %1,%1,%0\n"                     \
  47                 : /* output */                                  \
  48                 : /* input */                                   \
  49                   "m" (lval),                                   \
  50                   "i" (cr)                                      \
  51                 );                                              \
  52         } while(0)
  53
  54 #define get_cr(cr)                                              \
  55         ({                                                      \
  56                 u64 reg;                                        \
  57                                                                 \
  58                 asm volatile(                                   \
  59                         "stctg  %1,%1,%0\n"                     \
  60                 : /* output */                                  \
  61                   "=m" (reg)                                    \
  62                 : /* input */                                   \
  63                   "i" (cr)                                      \
  64                 );                                              \
  65                 reg;                                            \
  66          })
  67
  68 #endif