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PME# Question
Hi Experts,
the PCI Power Management Spec. Rev. 1.1 says on page 28, that
"Because a PCI bus RST# does not necessarily clear all functions' PME Context
(functions that support PME# from D3cold), the system software is required to
explicitly initialize all PME Context, including the PME support bits, for all
functions during initial operating system load."
The PME Status and PME Enable bits are defined as "Sticky bit, indeterminate
at time of initial operating system boot if function supports PME# from D3cold"
Does that mean that for a device supporting PME# from D3cold PME#, the PME
Status bit and the PME Enable bit are definitely allowed to have no asynchronous
reset (e.g. power on reset)?
(They definitely must be resettable by configuration cycles and must not be
reset by PCI bus RST#)
Could somebody please clarify this.
Thanks in advance,
Lukas Reinbold
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SysKonnect GmbH Lukas Reinbold
Senior Hardware Engineer
Siemensstr. 23 Phone +49 72 43 502 335
76275 Ettlingen Fax +49 72 43 502 365
Germany Internet lreinbold@syskonnect.de
S y s K o n n e c t - The Server Connectivity Company
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