2ef2b01e07
ArmPkg - Supoprt for ARM specific things that can change as the architecture changes. Plus semihosting JTAG drivers. EmbeddedPkg - Generic support for an embeddded platform. Including a light weight command line shell. BeagleBoardPkg - Platform specifics for BeagleBoard. SD Card works, but USB has issues. Looks like a bug in the open source USB stack (Our internal stack works fine). git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9518 6f19259b-4bc3-4df7-8a09-765794883524
374 lines
12 KiB
C
374 lines
12 KiB
C
/** @file
|
|
Template for Timer Architecture Protocol driver of the ARM flavor
|
|
|
|
Copyright (c) 2008-2009, Apple Inc. All rights reserved.
|
|
|
|
All rights reserved. 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 <Protocol/Timer.h>
|
|
#include <Protocol/HardwareInterrupt.h>
|
|
|
|
//
|
|
// Get Base Address of timer block from platform .DSC file
|
|
//
|
|
#define TIMER_BASE ((UINTN)FixedPcdGet32 (PcdTimerBaseAddress) + 0x00c0)
|
|
|
|
|
|
#define TIMER_CMD ((UINTN)FixedPcdGet32 (PcdTimerBaseAddress) + 0x00000004)
|
|
#define TIMER_DATA ((UINTN)FixedPcdGet32 (PcdTimerBaseAddress) + 0x00000008)
|
|
|
|
//
|
|
// The notification function to call on every timer interrupt.
|
|
// A bug in the compiler prevents us from initializing this here.
|
|
//
|
|
volatile EFI_TIMER_NOTIFY mTimerNotifyFunction;
|
|
|
|
//
|
|
// 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;
|
|
|
|
|
|
/**
|
|
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;
|
|
|
|
// Mask all interrupts
|
|
OriginalTPL = gBS->RaiseTPL (TPL_HIGH_LEVEL);
|
|
|
|
MmioWrite32 (TIMER_CMD, 0);
|
|
|
|
if (mTimerNotifyFunction) {
|
|
mTimerNotifyFunction (mTimerPeriod);
|
|
}
|
|
|
|
// restore state
|
|
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
|
|
)
|
|
{
|
|
//
|
|
// Check for invalid parameters
|
|
//
|
|
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;
|
|
|
|
if (TimerPeriod == 0) {
|
|
//
|
|
// Disable interrupt 0 and timer
|
|
//
|
|
MmioAnd32 (TIMER_DATA, 0);
|
|
|
|
Status = gInterrupt->DisableInterruptSource (gInterrupt, FixedPcdGet32 (PcdTimerVector));
|
|
} else {
|
|
//
|
|
// Convert TimerPeriod into Timer F counts
|
|
//
|
|
TimerCount = DivU64x32 (TimerPeriod + 5, 10);
|
|
|
|
//
|
|
// Program Timer F with the new count value
|
|
//
|
|
MmioWrite32 (TIMER_DATA, (UINT32)TimerCount);
|
|
|
|
//
|
|
// Enable interrupt and initialize and enable timer.
|
|
//
|
|
MmioOr32 (TIMER_CMD, 0x11);
|
|
|
|
Status = gInterrupt->EnableInterruptSource (gInterrupt, FixedPcdGet32 (PcdTimerVector));
|
|
}
|
|
|
|
//
|
|
// 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
|
|
};
|
|
|
|
EFI_HANDLE gTimerHandle = NULL;
|
|
|
|
|
|
/**
|
|
Initialize the state information for the Timer Architectural Protocol
|
|
|
|
@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_STATUS Status;
|
|
|
|
//
|
|
// Find the interrupt controller protocol. ASSERT if not found.
|
|
//
|
|
Status = gBS->LocateProtocol (&gHardwareInterruptProtocolGuid, NULL, ( VOID ** )&gInterrupt);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
MmioWrite32 (TIMER_CMD, 0x01);
|
|
|
|
//
|
|
// Force the timer to be disabled
|
|
//
|
|
Status = TimerDriverSetTimerPeriod (&gTimer, 0);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
//
|
|
// Install interrupt handler
|
|
//
|
|
Status = gInterrupt->RegisterInterruptSource (gInterrupt, FixedPcdGet32 (PcdTimerVector), TimerInterruptHandler);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
//
|
|
// Force the timer to be enabled at its default period
|
|
//
|
|
Status = TimerDriverSetTimerPeriod (&gTimer, FixedPcdGet32 (PcdTimerPeriod));
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
|
|
//
|
|
// Install the Timer Architectural Protocol onto a new handle
|
|
//
|
|
Status = gBS->InstallMultipleProtocolInterfaces (
|
|
&gTimerHandle,
|
|
&gEfiTimerArchProtocolGuid, &gTimer,
|
|
NULL
|
|
);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
return Status;
|
|
}
|
|
|