efix86_nap.c File Reference

gPXE CPU sleeping API for EFI More...

#include <gpxe/nap.h>
#include <gpxe/efi/efi.h>

Go to the source code of this file.

Functions

FILE_LICENCE (GPL2_OR_LATER)

static void efix86_cpu_nap (void)

Sleep until next interrupt.

PROVIDE_NAP (efix86, cpu_nap, efix86_cpu_nap)

Detailed Description

gPXE CPU sleeping API for EFI

Definition in file efix86_nap.c.

Function Documentation

FILE_LICENCE ( GPL2_OR_LATER )

static void efix86_cpu_nap ( void ) [static]

Sleep until next interrupt.

Definition at line 34 of file efix86_nap.c.

References __asm__().

00034                                     {
00035         /*
00036          * I can't find any EFI API that allows us to put the CPU to
00037          * sleep.  The CpuSleep() function is defined in CpuLib.h, but
00038          * isn't part of any exposed protocol so we have no way to
00039          * call it.
00040          *
00041          * The EFI shell doesn't seem to bother sleeping the CPU; it
00042          * just sits there idly burning power.
00043          *
00044          */
00045         __asm__ __volatile__ ( "hlt" );
00046 }

PROVIDE_NAP	(	efix86	,
		cpu_nap	,
		efix86_cpu_nap
	)


Functions
	FILE_LICENCE (GPL2_OR_LATER)
static void	efix86_cpu_nap (void)
	Sleep until next interrupt.
	PROVIDE_NAP (efix86, cpu_nap, efix86_cpu_nap)