Update to support a single stack. GCC update will follow.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9695 6f19259b-4bc3-4df7-8a09-765794883524

BeagleBoardPkg/InterruptDxe/HardwareInterrupt.c

@@ -93,7 +93,6 @@ RegisterInterruptSource (
   }
 
   gRegisteredInterruptHandlers[Source] = Handler;
-
   return This->EnableInterruptSource(This, Source);
 }
 

BeagleBoardPkg/Sec/Arm/ModuleEntryPoint.asm

@@ -53,33 +53,9 @@ stack_pointer_setup
   LoadConstantToReg (FixedPcdGet32(PcdPrePiStackSize) ,r3)    /* stack size arg3  */
   add     r4, r2, r3
 
-  //Enter IRQ mode and set up IRQ stack pointer
-  mov     r0,#0x12|0x80|0x40
-  msr     CPSR_c,r0
-  mov     r13,r4
-
-  //Enter Abort mode and set up Abort stack pointer
-  mov     r0,#0x17|0x80|0x40
-  msr     CPSR_c,r0
-  sub     r4, r4, #0x400
-  mov     r13,r4
-
-  //Enter Undefined mode and set up Undefined stack pointer
-  mov     r0,#0x1b|0x80|0x40
-  msr     CPSR_c,r0
-  sub     r4, r4, #0x400
-  mov     r13,r4
-
   //Enter SVC mode and set up SVC stack pointer
   mov     r0,#0x13|0x80|0x40
   msr     CPSR_c,r0
-  sub     r4, r4, #0x400
-  mov     r13,r4
-
-  //Enter System mode and set up System stack pointer
-  mov     r0,#0x1f|0x80|0x40
-  msr     CPSR_c,r0
-  sub     r4, r4, #0x400
   mov     r13,r4
 
   // Call C entry point

BeagleBoardPkg/Sec/Cache.c

@@ -82,7 +82,7 @@ InitCache (
   MemoryTable[4].Length       = 0;
   MemoryTable[4].Attributes   = (ARM_MEMORY_REGION_ATTRIBUTES)0;
   
-  ArmConfigureMmu(MemoryTable, &TranslationTableBase, &TranslationTableSize);
+  ArmConfigureMmu (MemoryTable, &TranslationTableBase, &TranslationTableSize);
   
   BuildMemoryAllocationHob((EFI_PHYSICAL_ADDRESS)(UINTN)TranslationTableBase, TranslationTableSize, EfiBootServicesData);
 }

BeagleBoardPkg/TimerDxe/Timer.c

@@ -53,6 +53,17 @@ volatile UINT32 TIER;
 // Cached interrupt vector
 volatile UINTN  gVector;
 
+
+/**
+  C Interrupt Handler calledin the interrupt context when Source interrupt is active.
+
+  @param Source         Source of the interrupt. Hardware routing off a specific platform defines
+                        what source means.
+  @param SystemContext  Pointer to system register context. Mostly used by debuggers and will
+                        update the system context after the return from the interrupt if 
+                        modified. Don't change these values unless you know what you are doing
+
+**/
 VOID
 EFIAPI
 TimerInterruptHandler (
@@ -60,6 +71,15 @@ TimerInterruptHandler (
   IN  EFI_SYSTEM_CONTEXT          SystemContext       
   )
 {
+  EFI_TPL OriginalTPL;
+
+  //
+  // DXE core uses this callback for the EFI timer tick. The DXE core uses locks 
+  // that raise to TPL_HIGH and then restore back to current level. Thus we need
+  // to make sure TPL level is set to TPL_HIGH while we are handling the timer tick. 
+  //
+  OriginalTPL = gBS->RaiseTPL (TPL_HIGH_LEVEL);
+
   if (mTimerPeriodicCallback) {
     mTimerPeriodicCallback(SystemContext);
   }
@@ -73,8 +93,39 @@ TimerInterruptHandler (
 
   // Poll interrupt status bits to ensure clearing
   while ((MmioRead32(TISR) & TISR_ALL_INTERRUPT_MASK) != TISR_NO_INTERRUPTS_PENDING);
+
+  gBS->RestoreTPL (OriginalTPL);
 }
 
+/**
+  This function registers the handler NotifyFunction so it is called every time 
+  the timer interrupt fires.  It also passes the amount of time since the last 
+  handler call to the NotifyFunction.  If NotifyFunction is NULL, then the 
+  handler is unregistered.  If the handler is registered, then EFI_SUCCESS is 
+  returned.  If the CPU does not support registering a timer interrupt handler, 
+  then EFI_UNSUPPORTED is returned.  If an attempt is made to register a handler 
+  when a handler is already registered, then EFI_ALREADY_STARTED is returned.  
+  If an attempt is made to unregister a handler when a handler is not registered, 
+  then EFI_INVALID_PARAMETER is returned.  If an error occurs attempting to 
+  register the NotifyFunction with the timer interrupt, then EFI_DEVICE_ERROR 
+  is returned.
+
+  @param  This             The EFI_TIMER_ARCH_PROTOCOL instance.
+  @param  NotifyFunction   The function to call when a timer interrupt fires. This
+                           function executes at TPL_HIGH_LEVEL. The DXE Core will
+                           register a handler for the timer interrupt, so it can know
+                           how much time has passed. This information is used to
+                           signal timer based events. NULL will unregister the handler.
+
+  @retval EFI_SUCCESS           The timer handler was registered.
+  @retval EFI_UNSUPPORTED       The platform does not support timer interrupts.
+  @retval EFI_ALREADY_STARTED   NotifyFunction is not NULL, and a handler is already
+                                registered.
+  @retval EFI_INVALID_PARAMETER NotifyFunction is NULL, and a handler was not
+                                previously registered.
+  @retval EFI_DEVICE_ERROR      The timer handler could not be registered.
+
+**/
 EFI_STATUS
 EFIAPI
 TimerDriverRegisterHandler (
@@ -95,6 +146,32 @@ TimerDriverRegisterHandler (
   return EFI_SUCCESS;
 }
 
+/**
+  This function adjusts the period of timer interrupts to the value specified 
+  by TimerPeriod.  If the timer period is updated, then the selected timer 
+  period is stored in EFI_TIMER.TimerPeriod, and EFI_SUCCESS is returned.  If 
+  the timer hardware is not programmable, then EFI_UNSUPPORTED is returned.  
+  If an error occurs while attempting to update the timer period, then the 
+  timer hardware will be put back in its state prior to this call, and 
+  EFI_DEVICE_ERROR is returned.  If TimerPeriod is 0, then the timer interrupt 
+  is disabled.  This is not the same as disabling the CPU's interrupts.  
+  Instead, it must either turn off the timer hardware, or it must adjust the 
+  interrupt controller so that a CPU interrupt is not generated when the timer 
+  interrupt fires. 
+
+  @param  This             The EFI_TIMER_ARCH_PROTOCOL instance.
+  @param  TimerPeriod      The rate to program the timer interrupt in 100 nS units. If
+                           the timer hardware is not programmable, then EFI_UNSUPPORTED is
+                           returned. If the timer is programmable, then the timer period
+                           will be rounded up to the nearest timer period that is supported
+                           by the timer hardware. If TimerPeriod is set to 0, then the
+                           timer interrupts will be disabled.
+
+  @retval EFI_SUCCESS           The timer period was changed.
+  @retval EFI_UNSUPPORTED       The platform cannot change the period of the timer interrupt.
+  @retval EFI_DEVICE_ERROR      The timer period could not be changed due to a device error.
+
+**/
 EFI_STATUS
 EFIAPI
 TimerDriverSetTimerPeriod (
@@ -136,6 +213,21 @@ TimerDriverSetTimerPeriod (
   return Status;
 }
 
+
+/**
+  This function retrieves the period of timer interrupts in 100 ns units, 
+  returns that value in TimerPeriod, and returns EFI_SUCCESS.  If TimerPeriod 
+  is NULL, then EFI_INVALID_PARAMETER is returned.  If a TimerPeriod of 0 is 
+  returned, then the timer is currently disabled.
+
+  @param  This             The EFI_TIMER_ARCH_PROTOCOL instance.
+  @param  TimerPeriod      A pointer to the timer period to retrieve in 100 ns units. If
+                           0 is returned, then the timer is currently disabled.
+
+  @retval EFI_SUCCESS           The timer period was returned in TimerPeriod.
+  @retval EFI_INVALID_PARAMETER TimerPeriod is NULL.
+
+**/
 EFI_STATUS
 EFIAPI
 TimerDriverGetTimerPeriod (
@@ -151,6 +243,21 @@ TimerDriverGetTimerPeriod (
   return EFI_SUCCESS;
 }
 
+/**
+  This function generates a soft timer interrupt. If the platform does not support soft 
+  timer interrupts, then EFI_UNSUPPORTED is returned. Otherwise, EFI_SUCCESS is returned. 
+  If a handler has been registered through the EFI_TIMER_ARCH_PROTOCOL.RegisterHandler() 
+  service, then a soft timer interrupt will be generated. If the timer interrupt is 
+  enabled when this service is called, then the registered handler will be invoked. The 
+  registered handler should not be able to distinguish a hardware-generated timer 
+  interrupt from a software-generated timer interrupt.
+
+  @param  This             The EFI_TIMER_ARCH_PROTOCOL instance.
+
+  @retval EFI_SUCCESS           The soft timer interrupt was generated.
+  @retval EFI_UNSUPPORTED       The platform does not support the generation of soft timer interrupts.
+
+**/
 EFI_STATUS
 EFIAPI
 TimerDriverGenerateSoftInterrupt (
@@ -160,6 +267,7 @@ TimerDriverGenerateSoftInterrupt (
   return EFI_UNSUPPORTED;
 }
 
+
 EFI_STATUS
 EFIAPI
 TimerDriverRegisterPeriodicCallback (
@@ -180,6 +288,41 @@ TimerDriverRegisterPeriodicCallback (
   return EFI_SUCCESS;
 }
 
+
+/**
+  Interface stucture for the Timer Architectural Protocol.
+
+  @par Protocol Description:
+  This protocol provides the services to initialize a periodic timer 
+  interrupt, and to register a handler that is called each time the timer
+  interrupt fires.  It may also provide a service to adjust the rate of the
+  periodic timer interrupt.  When a timer interrupt occurs, the handler is 
+  passed the amount of time that has passed since the previous timer 
+  interrupt.
+
+  @param RegisterHandler
+  Registers a handler that will be called each time the 
+  timer interrupt fires.  TimerPeriod defines the minimum 
+  time between timer interrupts, so TimerPeriod will also 
+  be the minimum time between calls to the registered 
+  handler.
+
+  @param SetTimerPeriod
+  Sets the period of the timer interrupt in 100 nS units.  
+  This function is optional, and may return EFI_UNSUPPORTED.  
+  If this function is supported, then the timer period will 
+  be rounded up to the nearest supported timer period.
+
+  @param GetTimerPeriod
+  Retrieves the period of the timer interrupt in 100 nS units.
+
+  @param GenerateSoftInterrupt
+  Generates a soft timer interrupt that simulates the firing of 
+  the timer interrupt. This service can be used to invoke the 
+  registered handler if the timer interrupt has been masked for 
+  a period of time.
+
+**/
 EFI_TIMER_ARCH_PROTOCOL   gTimer = {
   TimerDriverRegisterHandler,
   TimerDriverSetTimerPeriod,
@@ -191,6 +334,20 @@ TIMER_DEBUG_SUPPORT_PROTOCOL  gTimerDebugSupport = {
   TimerDriverRegisterPeriodicCallback
 };
 
+
+/**
+  Initialize the state information for the Timer Architectural Protocol and
+  the Timer Debug support protocol that allows the debugger to break into a
+  running program.
+
+  @param  ImageHandle   of the loaded driver
+  @param  SystemTable   Pointer to the System Table
+
+  @retval EFI_SUCCESS           Protocol registered
+  @retval EFI_OUT_OF_RESOURCES  Cannot allocate protocol data structure
+  @retval EFI_DEVICE_ERROR      Hardware problems
+
+**/
 EFI_STATUS
 EFIAPI
 TimerInitialize (