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 */ bios_cpu_nap(void)10static 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 ); 17