arch/arm/include/asm/smp_mpidr.h

   1 #ifndef ASMARM_SMP_MIDR_H
   2 #define ASMARM_SMP_MIDR_H
   3
   4 #define hard_smp_processor_id()                                         \
   5         ({                                                              \
   6                 unsigned int cpunum;                                    \
   7                 __asm__("\n"                                            \
   8                         "1:     mrc p15, 0, %0, c0, c0, 5\n"            \
   9                         "       .pushsection \".alt.smp.init\", \"a\"\n"\
  10                         "       .long   1b\n"                           \
  11                         "       mov     %0, #0\n"                       \
  12                         "       .popsection"                            \
  13                         : "=r" (cpunum));                               \
  14                 cpunum &= 0x0F;                                         \
  15         })
  16
  17 #endif