Date: Fri, 17 Oct 2003 10:01:12 -0700 (PDT) From: Nate Lawson <nate@root.org> To: Marcel Moolenaar <marcel@FreeBSD.org> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/ia64/ia64 machdep.c src/sys/kern kern_idle.c Message-ID: <20031017095829.Q41079@root.org> In-Reply-To: <20031017022536.7CD8516A57A@hub.freebsd.org> References: <20031017022536.7CD8516A57A@hub.freebsd.org>
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On Thu, 16 Oct 2003, Marcel Moolenaar wrote:
> FreeBSD src repository
>
> Modified files:
> sys/ia64/ia64 machdep.c
> sys/kern kern_idle.c
> Log:
> Implement cpu_idle() on ia64. We put the processor in a lightweight
> halt state that minimizes power consumption while still preserving
> cache and TLB coherency. Halting the processor is not conditional at
> this time. Tested with UP and SMP kernels.
Thank you!
> +void
> +cpu_idle()
> +{
> + struct ia64_pal_result res;
> +
> + res = ia64_call_pal_static(PAL_HALT_LIGHT, 0, 0, 0);
> }
>
> void
Is this the preferred way to do this? If I call asm("sti; hlt") on ia64,
will that work? What about on amd64?
Thanks,
Nate
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