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/** @file
CPU DXE Module.
Copyright (c) 2008 - 2013, Intel Corporation. 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.
**/
#ifndef _CPU_DXE_H_
#define _CPU_DXE_H_
#include <PiDxe.h>
#include <Protocol/Cpu.h>
#include <Library/UefiDriverEntryPoint.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/DxeServicesTableLib.h>
#include <Library/BaseLib.h>
#include <Library/CpuLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/DebugLib.h>
#include <Library/MtrrLib.h>
#include <Library/LocalApicLib.h>
#include <Library/UefiCpuLib.h>
#include <Library/UefiLib.h>
#include <Library/CpuExceptionHandlerLib.h>
#include <Guid/IdleLoopEvent.h>
#include <Guid/VectorHandoffTable.h>
#define EFI_MEMORY_CACHETYPE_MASK (EFI_MEMORY_UC | \
EFI_MEMORY_WC | \
EFI_MEMORY_WT | \
EFI_MEMORY_WB | \
EFI_MEMORY_UCE \
)
/**
Flush CPU data cache. If the instruction cache is fully coherent
with all DMA operations then function can just return EFI_SUCCESS.
@param This Protocol instance structure
@param Start Physical address to start flushing from.
@param Length Number of bytes to flush. Round up to chipset
granularity.
@param FlushType Specifies the type of flush operation to perform.
@retval EFI_SUCCESS If cache was flushed
@retval EFI_UNSUPPORTED If flush type is not supported.
@retval EFI_DEVICE_ERROR If requested range could not be flushed.
**/
EFI_STATUS
EFIAPI
CpuFlushCpuDataCache (
IN EFI_CPU_ARCH_PROTOCOL *This,
IN EFI_PHYSICAL_ADDRESS Start,
IN UINT64 Length,
IN EFI_CPU_FLUSH_TYPE FlushType
);
/**
Enables CPU interrupts.
@param This Protocol instance structure
@retval EFI_SUCCESS If interrupts were enabled in the CPU
@retval EFI_DEVICE_ERROR If interrupts could not be enabled on the CPU.
**/
EFI_STATUS
EFIAPI
CpuEnableInterrupt (
IN EFI_CPU_ARCH_PROTOCOL *This
);
/**
Disables CPU interrupts.
@param This Protocol instance structure
@retval EFI_SUCCESS If interrupts were disabled in the CPU.
@retval EFI_DEVICE_ERROR If interrupts could not be disabled on the CPU.
**/
EFI_STATUS
EFIAPI
CpuDisableInterrupt (
IN EFI_CPU_ARCH_PROTOCOL *This
);
/**
Return the state of interrupts.
@param This Protocol instance structure
@param State Pointer to the CPU's current interrupt state
@retval EFI_SUCCESS If interrupts were disabled in the CPU.
@retval EFI_INVALID_PARAMETER State is NULL.
**/
EFI_STATUS
EFIAPI
CpuGetInterruptState (
IN EFI_CPU_ARCH_PROTOCOL *This,
OUT BOOLEAN *State
);
/**
Generates an INIT to the CPU.
@param This Protocol instance structure
@param InitType Type of CPU INIT to perform
@retval EFI_SUCCESS If CPU INIT occurred. This value should never be
seen.
@retval EFI_DEVICE_ERROR If CPU INIT failed.
@retval EFI_UNSUPPORTED Requested type of CPU INIT not supported.
**/
EFI_STATUS
EFIAPI
CpuInit (
IN EFI_CPU_ARCH_PROTOCOL *This,
IN EFI_CPU_INIT_TYPE InitType
);
/**
Registers a function to be called from the CPU interrupt handler.
@param This Protocol instance structure
@param InterruptType Defines which interrupt to hook. IA-32
valid range is 0x00 through 0xFF
@param InterruptHandler A pointer to a function of type
EFI_CPU_INTERRUPT_HANDLER that is called
when a processor interrupt occurs. A null
pointer is an error condition.
@retval EFI_SUCCESS If handler installed or uninstalled.
@retval EFI_ALREADY_STARTED InterruptHandler is not NULL, and a handler
for InterruptType was previously installed.
@retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for
InterruptType was not previously installed.
@retval EFI_UNSUPPORTED The interrupt specified by InterruptType
is not supported.
**/
EFI_STATUS
EFIAPI
CpuRegisterInterruptHandler (
IN EFI_CPU_ARCH_PROTOCOL *This,
IN EFI_EXCEPTION_TYPE InterruptType,
IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler
);
/**
Returns a timer value from one of the CPU's internal timers. There is no
inherent time interval between ticks but is a function of the CPU frequency.
@param This - Protocol instance structure.
@param TimerIndex - Specifies which CPU timer is requested.
@param TimerValue - Pointer to the returned timer value.
@param TimerPeriod - A pointer to the amount of time that passes
in femtoseconds (10-15) for each increment
of TimerValue. If TimerValue does not
increment at a predictable rate, then 0 is
returned. The amount of time that has
passed between two calls to GetTimerValue()
can be calculated with the formula
(TimerValue2 - TimerValue1) * TimerPeriod.
This parameter is optional and may be NULL.
@retval EFI_SUCCESS - If the CPU timer count was returned.
@retval EFI_UNSUPPORTED - If the CPU does not have any readable timers.
@retval EFI_DEVICE_ERROR - If an error occurred while reading the timer.
@retval EFI_INVALID_PARAMETER - TimerIndex is not valid or TimerValue is NULL.
**/
EFI_STATUS
EFIAPI
CpuGetTimerValue (
IN EFI_CPU_ARCH_PROTOCOL *This,
IN UINT32 TimerIndex,
OUT UINT64 *TimerValue,
OUT UINT64 *TimerPeriod OPTIONAL
);
/**
Set memory cacheability attributes for given range of memeory.
@param This Protocol instance structure
@param BaseAddress Specifies the start address of the
memory range
@param Length Specifies the length of the memory range
@param Attributes The memory cacheability for the memory range
@retval EFI_SUCCESS If the cacheability of that memory range is
set successfully
@retval EFI_UNSUPPORTED If the desired operation cannot be done
@retval EFI_INVALID_PARAMETER The input parameter is not correct,
such as Length = 0
**/
EFI_STATUS
EFIAPI
CpuSetMemoryAttributes (
IN EFI_CPU_ARCH_PROTOCOL *This,
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length,
IN UINT64 Attributes
);
/**
Initialize Global Descriptor Table.
**/
VOID
InitGlobalDescriptorTable (
VOID
);
/**
Sets the code selector (CS).
@param Selector Value of code selector.
**/
VOID
EFIAPI
SetCodeSelector (
UINT16 Selector
);
/**
Sets the data selector (DS).
@param Selector Value of data selector.
**/
VOID
EFIAPI
SetDataSelectors (
UINT16 Selector
);
#endif
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