src/arch/i386/interface/pcbios/bios_nap.c

   1 #include <gpxe/nap.h>
   2 #include <realmode.h>
   3
   4 FILE_LICENCE ( GPL2_OR_LATER );
   5
   6 /**
   7  * Save power by halting the CPU until the next interrupt
   8  *
   9  */
  10 static void bios_cpu_nap ( void ) {
  11         __asm__ __volatile__ ( REAL_CODE ( "sti\n\t"
  12                                            "hlt\n\t"
  13                                            "cli\n\t" ) : : );
  14 }
  15
  16 PROVIDE_NAP ( pcbios, cpu_nap, bios_cpu_nap );