From: Andrew Fish
On Jun 13, 2015, at 1:52 AM, Sharma Bhupesh
bhupesh.sharma@freescale.com wrote:
Hi,
Can some ARM expert help me with my queries below.
The overall context is that I cannot get the 'ArmPlatformPkg/Bds/Bds.c'
auto-timeout to trigger.
The following snippet of code shows how the timeout is created as a
event using the CreateEvent and SetTimer APIs.
However I cannot the SetTimer API triggering a call to the
corresponding TimerDriverSetTimerPeriod API inside 'ArmPkg/Drivers/TimerDxe/TimerDxe.c’
It does not work that way. The DXE Core has a periodic timer at a fixed interval. The event based timers are implemented on top of the periodic tick in software.
https://svn.code.sf.net/p/edk2/code/trunk/edk2/MdeModulePkg/Core/Dxe/Even t/Timer.c https://svn.code.sf.net/p/edk2/code/trunk/edk2/MdeModulePkg/Core/Dxe/Eve nt/Timer.c The DXE Core registers CoreTimerTick() with the gEfiTimerArchProtocolGuid
https://svn.code.sf.net/p/edk2/code/trunk/edk2/MdeModulePkg/Core/Dxe/DxeM ain/DxeProtocolNotify.c https://svn.code.sf.net/p/edk2/code/trunk/edk2/MdeModulePkg/Core/Dxe/Dxe Main/DxeProtocolNotify.c if (CompareGuid (Entry->ProtocolGuid, &gEfiTimerArchProtocolGuid)) { // // Register the Core timer tick handler with the Timer AP // gTimer->RegisterHandler (gTimer, CoreTimerTick); }
Exactly. So I can see via a debugger that the SetTimer API indeed calls the DXE Core's CoreTimerXXXX() APIs. However I cannot see the auto-timeout working.
So in the following loop:
// Start the timer WaitIndex = 0; Print(L"The default boot selection will start in "); while ((Timeout > 0) && (WaitIndex == 0)) { Print(L"%3d seconds",Timeout); gBS->WaitForEvent (2, WaitList, &WaitIndex); if (WaitIndex == 0) { Print(L"\b\b\b\b\b\b\b\b\b\b\b"); Timeout--; } }
I never see the WaitIndex == 0, which would cause Timeout to auto-decrement and prints of "\b\b\b\b\b\b\b\b\b\b\b" to appear on the serial console.
So it seems like I might be missing something related to registering the Core timer tick handler with the Timer AP in my .dsc
Any pointers?
Regards, Bhupesh
if (Timeout != 0xFFFF) { if (Timeout > 0) { // Create the waiting events (keystroke and 1sec timer) gBS->CreateEvent (EVT_TIMER, 0, NULL, NULL, &WaitList[0]); gBS->SetTimer (WaitList[0], TimerPeriodic,
EFI_SET_TIMER_TO_SECOND);
WaitList[1] = gST->ConIn->WaitForKey; // Start the timer WaitIndex = 0; Print(L"The default boot selection will start in "); while ((Timeout > 0) && (WaitIndex == 0)) { Print(L"%3d seconds",Timeout); gBS->WaitForEvent (2, WaitList, &WaitIndex); if (WaitIndex == 0) { Print(L"\b\b\b\b\b\b\b\b\b\b\b"); Timeout--; } }So, I just wanted to understand if the auto-timeout during boot works on Juno-Rev1 and if yes, how does it connect to the underlying ArmArchTimerLib
Please help.
-----Original Message----- From: Sharma Bhupesh-B45370 Sent: Wednesday, June 10, 2015 4:01 PM To: edk2-devel@lists.sourceforge.net; 'olivier.martin@arm.com' Subject: AARCH64: Timer Dxe
Hi Olivier,
- I am looking at the 'ArmPkg/Drivers/TimerDxe/TimerDxe.c' DXE
driver and seeing how the timer interrupts are registered:
// Install secure and Non-secure interrupt handlers // Note: Because it is not possible to determine the security state of the // CPU dynamically, we just install interrupt handler for both sec and non-sec // timer PPI Status = gInterrupt->RegisterInterruptSource (gInterrupt, PcdGet32 (PcdArmArchTimerVirtIntrNum), TimerInterruptHandler); ASSERT_EFI_ERROR (Status);
Status = gInterrupt->RegisterInterruptSource (gInterrupt, PcdGet32 (PcdArmArchTimerHypIntrNum), TimerInterruptHandler); ASSERT_EFI_ERROR (Status);
Status = gInterrupt->RegisterInterruptSource (gInterrupt, PcdGet32 (PcdArmArchTimerSecIntrNum), TimerInterruptHandler); ASSERT_EFI_ERROR (Status);
Status = gInterrupt->RegisterInterruptSource (gInterrupt, PcdGet32 (PcdArmArchTimerIntrNum), TimerInterruptHandler); ASSERT_EFI_ERROR (Status);
I wanted to understand how the Interrupt registration changes for PPI or SPI interrupt sources. As usually the Virtual, Hypervisor, Physical and Physical Non-Secure interrupts are PPI does the PPI number need to be defined as the PCD values in the same way as linux. The Linux gicv3 documentation says (Documentation/devicetree/bindings/arm/gic-v3.txt):
SPI interrupts are in the range [0-987]. PPI interrupts are in the range [0-15].
- Also one related question is whether on Juno Rev1, you are able to
get the BootDelay to work via timer based events? If yes, can you please share if you achieve this by using the ARMv8 generic timer or the SP804 timer.
Regards, Bhupesh
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