We had a similar problem in the past where we allocated memory for a PPI that had two pointers (to two additional blocks of allocated memory that had our data). When permanent memory was installed the PPI pointer was migrated, but the pointers inside the PPI were not migrated. Our Pei module had to fix up the pointers in the PPI after memory was discovered.
To fix, our PEI Module called NotifyPpi(gPeiMemoryDiscoveredPpiGuid) (now gEfiPeiMemoryDiscoveredPpiGuid?). When the notify routine got called, it would locate the PPI, reallocate those two additional blocks of data again (and fill them with our data), and finally patch the PPI to point to the two new blocks of data. Allen -----Original Message----- From: Gao, Liming [mailto:[email protected]] Sent: Thursday, October 16, 2014 9:17 PM To: [email protected] Subject: Re: [edk2] PPIs passed into the PEI Core entry point get zero'ed out when permanent memory is installed? Andrew: If TemporaryRamSupportPpi is installed, it will migrate the full temp memory to permanent memory. If it is not ready, PeiCore will migrate the full temp memory. After memory is migrated, PeiCore will convert PPI pointers in temp memory. You can see ConvertPpiPointers() in MdeModulePkg\Core\Pei\Ppi\Ppi.c that covers all temp memory: heap, stack and hole. So, PPI pointers should be converted to the permanent memory. But, if PPI data is the temp memory, it can't be converted by PeiCore, because PeiCore doesn't understand the specific PPI data format. Thanks Liming -----Original Message----- From: Andrew Fish [mailto:[email protected]] Sent: Monday, September 29, 2014 10:06 AM To: [email protected] Subject: [edk2] PPIs passed into the PEI Core entry point get zero'ed out when permanent memory is installed? I don't see any place in the PI specs that state the PPIs passed from SEC to the PEI core don't make it past memory getting discovered. The PPI lists getting passed up are on the stack and were allocated prior to calling the PEI Core Main. Just like: https://svn.code.sf.net/p/edk2/code/trunk/edk2/EmulatorPkg/Sec/Sec.c I see this failure in the EmulatorPkg and on real hardware too. Thanks, Andrew Fish ------------------------------------------------------------------------------ Slashdot TV. Videos for Nerds. Stuff that Matters. http://pubads.g.doubleclick.net/gampad/clk?id=160591471&iu=/4140/ostg.clktrk _______________________________________________ edk2-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/edk2-devel ------------------------------------------------------------------------------ Comprehensive Server Monitoring with Site24x7. Monitor 10 servers for $9/Month. Get alerted through email, SMS, voice calls or mobile push notifications. Take corrective actions from your mobile device. http://p.sf.net/sfu/Zoho _______________________________________________ edk2-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/edk2-devel ------------------------------------------------------------------------------ Comprehensive Server Monitoring with Site24x7. Monitor 10 servers for $9/Month. Get alerted through email, SMS, voice calls or mobile push notifications. Take corrective actions from your mobile device. http://p.sf.net/sfu/Zoho _______________________________________________ edk2-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/edk2-devel
