Hi, I managed to trace down the issues with my UEFI ported code for a Cortex-A9 MP core based SoC.
I see two issues (after solving a few on the way) on which I cannot seem to make any headway. 1. gST->ConOut is NULL causing the Print routines inside StartDefaultBootOnTimeout (https://github.com/tianocore/edk2/blob/master/ArmPlatformPkg/Bds/Bds.c#L327), to not print anything on the UART console. - At first, I suspected this to be an issue with my .dsc file as I don't have a LCD available on my SoC and I had serial port as well as (a left over) LCD configured as SIMPLE TEXT protocols for ConOut. I have hence changed my .dsc to something like: # Use the serial console for both ConIn & ConOut gArmPlatformTokenSpaceGuid.PcdDefaultConOutPaths|L"VenHw(D3987D4B-971A-435F-8CAF-4967EB627241)/Uart(115200,8,N,1)/VenPcAnsi();" gArmPlatformTokenSpaceGuid.PcdDefaultConInPaths|L"VenHw(D3987D4B-971A-435F-8CAF-4967EB627241)/Uart(115200,8,N,1)/VenPcAnsi()" However, still I see that gST->ConOut is NULL (via the DS-5 source debugger). 2. Timer support in UEFI: - For every BoardPkg (e.g. ArmPlatformPkg/SP804, BeagleBoardPkg and Samsung etc), I can see that there are two Timer helper layers: # [1] Timer Dxe Driver: https://github.com/tianocore/edk2/tree/master/ArmPlatformPkg/Drivers/SP804TimerDxe # [2] Timer Lib: https://github.com/tianocore/edk2/tree/master/ArmPlatformPkg/Library/SP804TimerLib When I start to look at this code it seems that the UEFI code requires support for atleast 2 timers: Performance Timer (used in [1]) and another free SoC timer which is used to provide delays ([2]). Is this understanding correct? Does UEFI require atleast 2 timers to be supported by the SoC and are these timers used in parallel by the UEFI framework? Thanks for any pointers on the above two aspects. Regards, Bhupesh > -----Original Message----- > From: Sharma Bhupesh-B45370 > Sent: Tuesday, November 26, 2013 5:02 PM > To: Olivier Martin; 'Andrew Fish'; edk2-devel@lists.sourceforge.net > Cc: Kushwaha Prabhakar-B32579 > Subject: RE: SerialPrint not working in DxeServicesLib.c > > Hi Olivier, > > Thanks for your mail. > > I have a SerialPortLib which tries to configure Serial controller > specific to my board (so *no* 'SerialPortLib' pointing to > 'MdePkg/Library/BaseSerialPortLibNull/BaseSerialPortLibNull.inf' > in my DSC). > > I am getting the UEFI firmware .. banner at the very start. > > I will now try to add some SerialPortWrite() before calling > GetSectionFromAnyFv(). > > Regards, > Bhupesh > > > > -----Original Message----- > > From: Olivier Martin [mailto:olivier.mar...@arm.com] > > Sent: Tuesday, November 26, 2013 4:27 PM > > To: Sharma Bhupesh-B45370; 'Andrew Fish'; edk2- > > de...@lists.sourceforge.net > > Cc: Kushwaha Prabhakar-B32579 > > Subject: RE: SerialPrint not working in DxeServicesLib.c > > > > Sorry to not reply earlier, I was on holiday in the last two weeks. > > > > If you do not see any output from the serial, ensure your are using > > the appropriate 'SerialPortLib'. > > Check in your DSC file, there is no 'SerialPortLib' pointing to > > 'MdePkg/Library/BaseSerialPortLibNull/BaseSerialPortLibNull.inf'. > > Example: > > > > [LibraryClasses.common] > > (...) > > > > SerialPortLib|MdePkg/Library/BaseSerialPortLibNull/BaseSerialPortLibNu > > SerialPortLib|ll > > SerialPortLib|.inf > > (...) > > > > SerialPortLib should use the implementation for your Serial controller. > > > > Try also to add some SerialPortWrite() before calling > > GetSectionFromAnyFv(). > > I would not be surprised if the crash happens much earlier than the > > DXE phase. > > > > > > > -----Original Message----- > > > From: Bhupesh Sharma [mailto:bhupesh.sha...@freescale.com] > > > Sent: 20 November 2013 11:50 > > > To: 'Andrew Fish'; 'edk2-devel@lists.sourceforge.net'; Olivier > > > Martin > > > Cc: Prabhakar Kushwaha > > > Subject: RE: SerialPrint not working in DxeServicesLib.c > > > > > > I don't know why but I didn't get any mail from the mail list server > > > for my original mail below, though I can see same in the mail list > > > archives. > > > > > > Adding Andrew.. > > > > > > Can you guys please help me with the issue mentioned below. > > > > > > Regards, > > > Bhupesh > > > > > > > -----Original Message----- > > > > From: Sharma Bhupesh-B45370 > > > > Sent: Tuesday, November 19, 2013 4:25 PM > > > > To: 'edk2-devel@lists.sourceforge.net'; 'Olivier Martin' > > > > Cc: 'boot-architect...@lists.linaro.org'; Kushwaha > > > > Prabhakar-B32579 > > > > Subject: SerialPrint not working in DxeServicesLib.c > > > > > > > > Hi List, > > > > > > > > I am experiencing a Data Abort inside function > 'GetSectionFromAnyFv' > > > in > > > > file 'DxeServicesLib.c' > > > > on my ARMv7 UEFI platform. > > > > > > > > To debug the same I added some print messages like: > > > > > > > > /* Added for debugging */ > > > > CHAR8 Buffer1[100]; > > > > UINTN CharCount; > > > > CharCount = AsciiSPrint (Buffer1,sizeof (Buffer1),"Inside > > > Func\n\r"); > > > > SerialPortWrite ((UINT8 *) Buffer1, CharCount); > > > > > > > > > > > > And also something like: > > > > SerialPrint ("Inside Func\n\r"); > > > > > > > > I have included: > > > > #include <Library/PrintLib.h> > > > > #include <Library/SerialPortLib.h> > > > > > > > > and defined: > > > > > > > > #define SerialPrint(txt) SerialPortWrite ((UINT8*)(txt), > > > > AsciiStrLen(txt)+1); > > > > > > > > I still cannot see any debug prints on the UART (placed right > > > > after > > > the > > > > entry point of 'GetSectionFromAnyFv' function). > > > > Debugger (DS-5) suggests that the crash is inside > > > 'GetSectionFromAnyFv' > > > > itself. > > > > > > > > I get the UEFI firmware <version xx built at xx on xx) and Data > > > > Abort Exception PC at xx prints on the console, but no prints from > > > > 'DxeServicesLib.c' > > > > > > > > Any pointers to what I may be missing here. > > > > > > > > Regards, > > > > Bhupesh > > > > > > > > > > > > > > ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. 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