diff options
Diffstat (limited to 'Omap35xxPkg/TimerDxe')
| -rw-r--r-- | Omap35xxPkg/TimerDxe/Timer.c | 752 | ||||
| -rw-r--r-- | Omap35xxPkg/TimerDxe/TimerDxe.inf | 114 |
2 files changed, 433 insertions, 433 deletions
diff --git a/Omap35xxPkg/TimerDxe/Timer.c b/Omap35xxPkg/TimerDxe/Timer.c index d0ea973509..bc3d9b0aba 100644 --- a/Omap35xxPkg/TimerDxe/Timer.c +++ b/Omap35xxPkg/TimerDxe/Timer.c @@ -1,376 +1,376 @@ -/** @file - Template for Timer Architecture Protocol driver of the ARM flavor - - Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR> - - This program and the accompanying materials - are licensed and made available under the terms and conditions of the BSD License - which accompanies this distribution. The full text of the license may be found at - http://opensource.org/licenses/bsd-license.php - - THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, - WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. - -**/ - - -#include <PiDxe.h> - -#include <Library/BaseLib.h> -#include <Library/DebugLib.h> -#include <Library/BaseMemoryLib.h> -#include <Library/UefiBootServicesTableLib.h> -#include <Library/UefiLib.h> -#include <Library/PcdLib.h> -#include <Library/IoLib.h> -#include <Library/OmapLib.h> - -#include <Protocol/Timer.h> -#include <Protocol/HardwareInterrupt.h> - -#include <Omap3530/Omap3530.h> - - -// The notification function to call on every timer interrupt. -volatile EFI_TIMER_NOTIFY mTimerNotifyFunction = (EFI_TIMER_NOTIFY)NULL; - - -// The current period of the timer interrupt -volatile UINT64 mTimerPeriod = 0; - -// Cached copy of the Hardware Interrupt protocol instance -EFI_HARDWARE_INTERRUPT_PROTOCOL *gInterrupt = NULL; - -// Cached registers -volatile UINT32 TISR; -volatile UINT32 TCLR; -volatile UINT32 TLDR; -volatile UINT32 TCRR; -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 ( - IN HARDWARE_INTERRUPT_SOURCE Source, - 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 (mTimerNotifyFunction) { - mTimerNotifyFunction(mTimerPeriod); - } - - // Clear all timer interrupts - MmioWrite32 (TISR, TISR_CLEAR_ALL); - - // 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 ( - IN EFI_TIMER_ARCH_PROTOCOL *This, - IN EFI_TIMER_NOTIFY NotifyFunction - ) -{ - if ((NotifyFunction == NULL) && (mTimerNotifyFunction == NULL)) { - return EFI_INVALID_PARAMETER; - } - - if ((NotifyFunction != NULL) && (mTimerNotifyFunction != NULL)) { - return EFI_ALREADY_STARTED; - } - - mTimerNotifyFunction = NotifyFunction; - - 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 ( - IN EFI_TIMER_ARCH_PROTOCOL *This, - IN UINT64 TimerPeriod - ) -{ - EFI_STATUS Status; - UINT64 TimerCount; - INT32 LoadValue; - - if (TimerPeriod == 0) { - // Turn off GPTIMER3 - MmioWrite32 (TCLR, TCLR_ST_OFF); - - Status = gInterrupt->DisableInterruptSource(gInterrupt, gVector); - } else { - // Calculate required timer count - TimerCount = DivU64x32(TimerPeriod * 100, PcdGet32(PcdEmbeddedPerformanceCounterPeriodInNanoseconds)); - - // Set GPTIMER3 Load register - LoadValue = (INT32) -TimerCount; - MmioWrite32 (TLDR, LoadValue); - MmioWrite32 (TCRR, LoadValue); - - // Enable Overflow interrupt - MmioWrite32 (TIER, TIER_TCAR_IT_DISABLE | TIER_OVF_IT_ENABLE | TIER_MAT_IT_DISABLE); - - // Turn on GPTIMER3, it will reload at overflow - MmioWrite32 (TCLR, TCLR_AR_AUTORELOAD | TCLR_ST_ON); - - Status = gInterrupt->EnableInterruptSource(gInterrupt, gVector); - } - - // - // Save the new timer period - // - mTimerPeriod = TimerPeriod; - 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 ( - IN EFI_TIMER_ARCH_PROTOCOL *This, - OUT UINT64 *TimerPeriod - ) -{ - if (TimerPeriod == NULL) { - return EFI_INVALID_PARAMETER; - } - - *TimerPeriod = mTimerPeriod; - 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 ( - IN EFI_TIMER_ARCH_PROTOCOL *This - ) -{ - return EFI_UNSUPPORTED; -} - - -/** - 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, - TimerDriverGetTimerPeriod, - TimerDriverGenerateSoftInterrupt -}; - - -/** - 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 ( - IN EFI_HANDLE ImageHandle, - IN EFI_SYSTEM_TABLE *SystemTable - ) -{ - EFI_HANDLE Handle = NULL; - EFI_STATUS Status; - UINT32 TimerBaseAddress; - - // Find the interrupt controller protocol. ASSERT if not found. - Status = gBS->LocateProtocol (&gHardwareInterruptProtocolGuid, NULL, (VOID **)&gInterrupt); - ASSERT_EFI_ERROR (Status); - - // Set up the timer registers - TimerBaseAddress = TimerBase (FixedPcdGet32(PcdOmap35xxArchTimer)); - TISR = TimerBaseAddress + GPTIMER_TISR; - TCLR = TimerBaseAddress + GPTIMER_TCLR; - TLDR = TimerBaseAddress + GPTIMER_TLDR; - TCRR = TimerBaseAddress + GPTIMER_TCRR; - TIER = TimerBaseAddress + GPTIMER_TIER; - - // Disable the timer - Status = TimerDriverSetTimerPeriod (&gTimer, 0); - ASSERT_EFI_ERROR (Status); - - // Install interrupt handler - gVector = InterruptVectorForTimer (FixedPcdGet32(PcdOmap35xxArchTimer)); - Status = gInterrupt->RegisterInterruptSource (gInterrupt, gVector, TimerInterruptHandler); - ASSERT_EFI_ERROR (Status); - - // Turn on the functional clock for Timer - MmioOr32 (CM_FCLKEN_PER, CM_FCLKEN_PER_EN_GPT3_ENABLE); - - // Set up default timer - Status = TimerDriverSetTimerPeriod (&gTimer, FixedPcdGet32(PcdTimerPeriod)); - ASSERT_EFI_ERROR (Status); - - // Install the Timer Architectural Protocol onto a new handle - Status = gBS->InstallMultipleProtocolInterfaces ( - &Handle, - &gEfiTimerArchProtocolGuid, &gTimer, - NULL - ); - ASSERT_EFI_ERROR(Status); - - return Status; -} - +/** @file
+ Template for Timer Architecture Protocol driver of the ARM flavor
+
+ Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+
+#include <PiDxe.h>
+
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiLib.h>
+#include <Library/PcdLib.h>
+#include <Library/IoLib.h>
+#include <Library/OmapLib.h>
+
+#include <Protocol/Timer.h>
+#include <Protocol/HardwareInterrupt.h>
+
+#include <Omap3530/Omap3530.h>
+
+
+// The notification function to call on every timer interrupt.
+volatile EFI_TIMER_NOTIFY mTimerNotifyFunction = (EFI_TIMER_NOTIFY)NULL;
+
+
+// The current period of the timer interrupt
+volatile UINT64 mTimerPeriod = 0;
+
+// Cached copy of the Hardware Interrupt protocol instance
+EFI_HARDWARE_INTERRUPT_PROTOCOL *gInterrupt = NULL;
+
+// Cached registers
+volatile UINT32 TISR;
+volatile UINT32 TCLR;
+volatile UINT32 TLDR;
+volatile UINT32 TCRR;
+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 (
+ IN HARDWARE_INTERRUPT_SOURCE Source,
+ 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 (mTimerNotifyFunction) {
+ mTimerNotifyFunction(mTimerPeriod);
+ }
+
+ // Clear all timer interrupts
+ MmioWrite32 (TISR, TISR_CLEAR_ALL);
+
+ // 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 (
+ IN EFI_TIMER_ARCH_PROTOCOL *This,
+ IN EFI_TIMER_NOTIFY NotifyFunction
+ )
+{
+ if ((NotifyFunction == NULL) && (mTimerNotifyFunction == NULL)) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if ((NotifyFunction != NULL) && (mTimerNotifyFunction != NULL)) {
+ return EFI_ALREADY_STARTED;
+ }
+
+ mTimerNotifyFunction = NotifyFunction;
+
+ 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 (
+ IN EFI_TIMER_ARCH_PROTOCOL *This,
+ IN UINT64 TimerPeriod
+ )
+{
+ EFI_STATUS Status;
+ UINT64 TimerCount;
+ INT32 LoadValue;
+
+ if (TimerPeriod == 0) {
+ // Turn off GPTIMER3
+ MmioWrite32 (TCLR, TCLR_ST_OFF);
+
+ Status = gInterrupt->DisableInterruptSource(gInterrupt, gVector);
+ } else {
+ // Calculate required timer count
+ TimerCount = DivU64x32(TimerPeriod * 100, PcdGet32(PcdEmbeddedPerformanceCounterPeriodInNanoseconds));
+
+ // Set GPTIMER3 Load register
+ LoadValue = (INT32) -TimerCount;
+ MmioWrite32 (TLDR, LoadValue);
+ MmioWrite32 (TCRR, LoadValue);
+
+ // Enable Overflow interrupt
+ MmioWrite32 (TIER, TIER_TCAR_IT_DISABLE | TIER_OVF_IT_ENABLE | TIER_MAT_IT_DISABLE);
+
+ // Turn on GPTIMER3, it will reload at overflow
+ MmioWrite32 (TCLR, TCLR_AR_AUTORELOAD | TCLR_ST_ON);
+
+ Status = gInterrupt->EnableInterruptSource(gInterrupt, gVector);
+ }
+
+ //
+ // Save the new timer period
+ //
+ mTimerPeriod = TimerPeriod;
+ 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 (
+ IN EFI_TIMER_ARCH_PROTOCOL *This,
+ OUT UINT64 *TimerPeriod
+ )
+{
+ if (TimerPeriod == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ *TimerPeriod = mTimerPeriod;
+ 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 (
+ IN EFI_TIMER_ARCH_PROTOCOL *This
+ )
+{
+ return EFI_UNSUPPORTED;
+}
+
+
+/**
+ 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,
+ TimerDriverGetTimerPeriod,
+ TimerDriverGenerateSoftInterrupt
+};
+
+
+/**
+ 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 (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_HANDLE Handle = NULL;
+ EFI_STATUS Status;
+ UINT32 TimerBaseAddress;
+
+ // Find the interrupt controller protocol. ASSERT if not found.
+ Status = gBS->LocateProtocol (&gHardwareInterruptProtocolGuid, NULL, (VOID **)&gInterrupt);
+ ASSERT_EFI_ERROR (Status);
+
+ // Set up the timer registers
+ TimerBaseAddress = TimerBase (FixedPcdGet32(PcdOmap35xxArchTimer));
+ TISR = TimerBaseAddress + GPTIMER_TISR;
+ TCLR = TimerBaseAddress + GPTIMER_TCLR;
+ TLDR = TimerBaseAddress + GPTIMER_TLDR;
+ TCRR = TimerBaseAddress + GPTIMER_TCRR;
+ TIER = TimerBaseAddress + GPTIMER_TIER;
+
+ // Disable the timer
+ Status = TimerDriverSetTimerPeriod (&gTimer, 0);
+ ASSERT_EFI_ERROR (Status);
+
+ // Install interrupt handler
+ gVector = InterruptVectorForTimer (FixedPcdGet32(PcdOmap35xxArchTimer));
+ Status = gInterrupt->RegisterInterruptSource (gInterrupt, gVector, TimerInterruptHandler);
+ ASSERT_EFI_ERROR (Status);
+
+ // Turn on the functional clock for Timer
+ MmioOr32 (CM_FCLKEN_PER, CM_FCLKEN_PER_EN_GPT3_ENABLE);
+
+ // Set up default timer
+ Status = TimerDriverSetTimerPeriod (&gTimer, FixedPcdGet32(PcdTimerPeriod));
+ ASSERT_EFI_ERROR (Status);
+
+ // Install the Timer Architectural Protocol onto a new handle
+ Status = gBS->InstallMultipleProtocolInterfaces (
+ &Handle,
+ &gEfiTimerArchProtocolGuid, &gTimer,
+ NULL
+ );
+ ASSERT_EFI_ERROR(Status);
+
+ return Status;
+}
+
diff --git a/Omap35xxPkg/TimerDxe/TimerDxe.inf b/Omap35xxPkg/TimerDxe/TimerDxe.inf index 6cfab77570..2c5a2f7a4a 100644 --- a/Omap35xxPkg/TimerDxe/TimerDxe.inf +++ b/Omap35xxPkg/TimerDxe/TimerDxe.inf @@ -1,57 +1,57 @@ -#/** @file -# -# Component description file for Timer module -# -# Copyright (c) 2009, Apple Inc. All rights reserved.<BR> -# This program and the accompanying materials -# are licensed and made available under the terms and conditions of the BSD License -# which accompanies this distribution. The full text of the license may be found at -# http://opensource.org/licenses/bsd-license.php -# -# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, -# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. -# -#**/ - -[Defines] - INF_VERSION = 0x00010005 - BASE_NAME = BeagleBoardTimerDxe - FILE_GUID = 6ddbf08b-cfc9-43cc-9e81-0784ba312ca0 - MODULE_TYPE = DXE_DRIVER - VERSION_STRING = 1.0 - - ENTRY_POINT = TimerInitialize - -[Sources.common] - Timer.c - -[Packages] - Omap35xxPkg/Omap35xxPkg.dec - MdePkg/MdePkg.dec - EmbeddedPkg/EmbeddedPkg.dec - ArmPkg/ArmPkg.dec - -[LibraryClasses] - BaseLib - UefiRuntimeServicesTableLib - UefiLib - UefiBootServicesTableLib - BaseMemoryLib - DebugLib - UefiDriverEntryPoint - IoLib - OmapLib - -[Guids] - -[Protocols] - gEfiTimerArchProtocolGuid - gHardwareInterruptProtocolGuid - -[Pcd.common] - gEmbeddedTokenSpaceGuid.PcdTimerPeriod - gEmbeddedTokenSpaceGuid.PcdEmbeddedPerformanceCounterPeriodInNanoseconds - gOmap35xxTokenSpaceGuid.PcdOmap35xxArchTimer - -[Depex] - gHardwareInterruptProtocolGuid
\ No newline at end of file +#/** @file
+#
+# Component description file for Timer module
+#
+# Copyright (c) 2009, Apple Inc. All rights reserved.<BR>
+# This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD License
+# which accompanies this distribution. The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php
+#
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+#**/
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = BeagleBoardTimerDxe
+ FILE_GUID = 6ddbf08b-cfc9-43cc-9e81-0784ba312ca0
+ MODULE_TYPE = DXE_DRIVER
+ VERSION_STRING = 1.0
+
+ ENTRY_POINT = TimerInitialize
+
+[Sources.common]
+ Timer.c
+
+[Packages]
+ Omap35xxPkg/Omap35xxPkg.dec
+ MdePkg/MdePkg.dec
+ EmbeddedPkg/EmbeddedPkg.dec
+ ArmPkg/ArmPkg.dec
+
+[LibraryClasses]
+ BaseLib
+ UefiRuntimeServicesTableLib
+ UefiLib
+ UefiBootServicesTableLib
+ BaseMemoryLib
+ DebugLib
+ UefiDriverEntryPoint
+ IoLib
+ OmapLib
+
+[Guids]
+
+[Protocols]
+ gEfiTimerArchProtocolGuid
+ gHardwareInterruptProtocolGuid
+
+[Pcd.common]
+ gEmbeddedTokenSpaceGuid.PcdTimerPeriod
+ gEmbeddedTokenSpaceGuid.PcdEmbeddedPerformanceCounterPeriodInNanoseconds
+ gOmap35xxTokenSpaceGuid.PcdOmap35xxArchTimer
+
+[Depex]
+ gHardwareInterruptProtocolGuid
\ No newline at end of file |