Hi Ralf, I reviewed the data sheet of Mips CPU - QED RM5231. There is a wait instruction. But when the SysAD bus goes to idle, the wait instruction is valid. How can I SysAD bus make idle state? Han-Seong -----Original Message----- From: Ralf Baechle [mailto:ralf@oss.sgi.com] Sent: Monday, November 12, 2001 9:31 PM To: Han-Seong Kim Cc: linux-mips@fnet.fr; linux-mips@oss.sgi.com Subject: Re: Power MGMT on mips On Mon, Nov 12, 2001 at 05:13:40PM +0900, Han-Seong Kim wrote: > I want to ask about Power-Mnagement on mips. > 1. Is it possible to use power mgnt (ex. apm,acpi) features of linux kernel? Both are PC stuff, so no. > 2.If no, how can manage CPU and Bidge chips for power mgnt ? Right now Linux/MIPS will only use the CPU's power managment features, that is the wait instruction or similar. Ralf