<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <meta name="Generator" content="Microsoft Word 15 (filtered medium)"> <style></style> </head> <body lang="EN-US" link="blue" vlink="purple"> <div class="WordSection1"> Tiger:<o:p></o:p> Yes. Quark SmBusLib is the real library instance. Mde SmBusLib bases on PPI. Platform can decide to implement the real SmbusLib library instance or provide SmbusPPI implementation. <o:p></o:p> <o:p> </o:p> Thanks<o:p></o:p> Liming<o:p></o:p> <div> <div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in"> From: devel@edk2.groups.io [mailto:devel@edk2.groups.io] On Behalf Of Tiger Liu(BJ-RD) Sent: Monday, November 04, 2019 1:04 PM To: Gao, Liming <liming.gao@intel.com>; devel@edk2.groups.io Subject: Re: [edk2-devel] [edk2] Smbuslib and SmbusPpi<o:p></o:p> </div> </div> <o:p> </o:p> Hi, Liming:<o:p></o:p> I found two smbuslib implemented in below path:<o:p></o:p> <![if !supportLists]>1. <![endif]>edk2-platforms\Silicon\Intel\QuarkSocPkg\QuarkNorthCluster\Library\SmbusLib<o:p></o:p> I named this smbuslib as quark-smbuslib<o:p></o:p> <![if !supportLists]>2. <![endif]>MdePkg\Library\PeiSmbusLibSmbus2Ppi\<o:p></o:p> I name this smbuslib as Mde-smbuslib<o:p></o:p> <o:p> </o:p> My questions are:<o:p></o:p> <![if !supportLists]>1. <![endif]>Quark-smbuslib provided some basic smbus operation functions, and these functions could be called by some PEIMs/Dxe drivers<o:p></o:p> So, it means not needed to implement gEfiPeiSmbus2Ppi for PEI phase? <o:p></o:p> (because quark-smbuslib has provided needed functions)<o:p></o:p> <![if !supportLists]>2. <![endif]>Mde-smbuslib will consume gEfiPeiSmbus2PpiGuid<o:p></o:p> This smbuslib is independent , and just uses gEfiPeiSmbus2Ppi to encapsulate some functions.<o:p></o:p> So, a BIOS provider should implement a gEfiPeiSmbus2Ppi for PEI phase?<o:p></o:p> <o:p> </o:p> Thanks<o:p></o:p> <div> <div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in"> 发件人: Gao, Liming <<a href="mailto:liming.gao@intel.com">liming.gao@intel.com</a>> 发送时间: 2019年11月4日 11:31 收件人: <a href="mailto:devel@edk2.groups.io">devel@edk2.groups.io</a>; Tiger Liu(BJ-RD) <<a href="mailto:TigerLiu@zhaoxin.com">TigerLiu@zhaoxin.com</a>> 主题: RE: [edk2-devel] [edk2] Smbuslib and SmbusPpi<o:p></o:p> </div> </div> <o:p> </o:p> SmbusPpi is defined in PI spec. SmbusLib is defined in Edk2 MdePkg. <o:p></o:p> <o:p> </o:p> Edk2 PEIM can base on SmBusLib. SmBusLib implementation wraps SmBusPpi. <o:p></o:p> <o:p> </o:p> Thanks<o:p></o:p> Liming<o:p></o:p> <div> <div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in"> From: <a href="mailto:devel@edk2.groups.io">devel@edk2.groups.io</a> [<a href="mailto:devel@edk2.groups.io">mailto:devel@edk2.groups.io</a>] On Behalf Of Tiger Liu(BJ-RD) Sent: Thursday, October 31, 2019 6:51 PM To: <a href="mailto:devel@edk2.groups.io">devel@edk2.groups.io</a>; Gao, Liming <<a href="mailto:liming.gao@intel.com">liming.gao@intel.com</a>> Subject: [edk2-devel] [edk2] Smbuslib and SmbusPpi<o:p></o:p> </div> </div> <o:p> </o:p> <div> Hi, Liming:<o:p></o:p> I have a question about smbus access during pei phase.<o:p></o:p> <o:p> </o:p> I found there was not smbus ppi reference implementation in edk2-platform code base.<o:p></o:p> And there was a SmbusLib reference implementation lib.<o:p></o:p> <o:p> </o:p> So, PEIMs usually use functions provided by SmbusLib?<o:p></o:p> Not use PeiSmbusPpi’s interface functions?<o:p></o:p> <o:p> </o:p> Thanks<o:p></o:p> <o:p> </o:p> Best wishes,<o:p></o:p> </div> <o:p> </o:p> <div> 保密声明：<o:p></o:p> </div> <div> 本邮件含有保密或专有信息，仅供指定收件人使用。严禁对本邮件或其内容做任何未经授权的查阅、使用、复制或转发。<o:p></o:p> </div> <div> CONFIDENTIAL NOTE: <o:p></o:p> </div> <div> This email contains confidential or legally privileged information and is for the sole use of its intended recipient. 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