Hello, On Tuesday 14 December 2010, 11:12:10 Drasko DRASKOVIC wrote: > On Tue, Dec 14, 2010 at 12:35 AM, Greg Ungerer <g...@snapgear.com> wrote: > > What version of uClinux are you using? > > The specifics of the idle state are also dependent on the specific > > vendor ARM device you are using. What is the exact part you are > > using? > > Hi Greg, > I have found an issue. I am using ARM946E, uClinux kerenel 2.6. > > In arch/arm/kernel/process.c I can see that default_idle() function is > calling arch_idle(), which is defined in include/asm/arch/system.h and > is basically call to a architecture specific cpu_arm946_do_idle() > which is defined in arch/arm/mm/proc-arm946.S and represents CP15 > manipulation to implement "wait for interrupt" operation. > > What is suprising, is the comment in arch_idle() function : > /* > * Set the processor (CP15) into 'Wait for Interrupt' mode. > * Unlike disabling the processor clock via the PMC (above) > * this allows the processor to be woken via JTAG. > */ > but this does not seem to be true at all. > > Commenting out code which does "wait for interrupt" operation solves > the problem.
Try passing nohlt on kernel command line. Best regards, Alexander _______________________________________________ uClinux-dev mailing list uClinux-dev@uclinux.org http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by uclinux-dev@uclinux.org To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev
