diff options
Diffstat (limited to 'src/VBox/Devices/PC/ipxe/src/arch/x86/interface/pcbios/bios_nap.c')
-rw-r--r-- | src/VBox/Devices/PC/ipxe/src/arch/x86/interface/pcbios/bios_nap.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/VBox/Devices/PC/ipxe/src/arch/x86/interface/pcbios/bios_nap.c b/src/VBox/Devices/PC/ipxe/src/arch/x86/interface/pcbios/bios_nap.c new file mode 100644 index 00000000..f1ba8297 --- /dev/null +++ b/src/VBox/Devices/PC/ipxe/src/arch/x86/interface/pcbios/bios_nap.c @@ -0,0 +1,16 @@ +#include <ipxe/nap.h> +#include <realmode.h> + +FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); + +/** + * Save power by halting the CPU until the next interrupt + * + */ +static void bios_cpu_nap ( void ) { + __asm__ __volatile__ ( "sti\n\t" + "hlt\n\t" + "cli\n\t" ); +} + +PROVIDE_NAP ( pcbios, cpu_nap, bios_cpu_nap ); |