diff options
| author |   Yang Zhang <yang.z.zhang@intel.com> | 2015-08-28 09:58:54 +0800 |
|---|---|---|
| committer | Yang Zhang <yang.z.zhang@intel.com> | 2015-09-01 12:44:00 +0800 |
| commit | e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch) | |
| tree | 66b09f592c55df2878107a468a91d21506104d3f /qemu/roms/ipxe/src/arch/i386/interface/pcbios/bios_nap.c | |
| parent | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff) | |
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/roms/ipxe/src/arch/i386/interface/pcbios/bios_nap.c')
| -rw-r--r-- | qemu/roms/ipxe/src/arch/i386/interface/pcbios/bios_nap.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/qemu/roms/ipxe/src/arch/i386/interface/pcbios/bios_nap.c b/qemu/roms/ipxe/src/arch/i386/interface/pcbios/bios_nap.c new file mode 100644 index 000000000..1e7de756b --- /dev/null +++ b/qemu/roms/ipxe/src/arch/i386/interface/pcbios/bios_nap.c @@ -0,0 +1,16 @@ +#include <ipxe/nap.h> +#include <realmode.h> + +FILE_LICENCE ( GPL2_OR_LATER ); + +/** + * 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 ); |