mirror of https://github.com/acidanthera/audk.git
301 lines
13 KiB
C
301 lines
13 KiB
C
/** @file
|
|
CPU Architectural Protocol as defined in PI spec Volume 2 DXE
|
|
|
|
This code abstracts the DXE core from processor implementation details.
|
|
|
|
Copyright (c) 2006 - 2018, 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 __ARCH_PROTOCOL_CPU_H__
|
|
#define __ARCH_PROTOCOL_CPU_H__
|
|
|
|
#include <Protocol/DebugSupport.h>
|
|
|
|
#define EFI_CPU_ARCH_PROTOCOL_GUID \
|
|
{ 0x26baccb1, 0x6f42, 0x11d4, {0xbc, 0xe7, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 } }
|
|
|
|
typedef struct _EFI_CPU_ARCH_PROTOCOL EFI_CPU_ARCH_PROTOCOL;
|
|
|
|
///
|
|
/// The type of flush operation
|
|
///
|
|
typedef enum {
|
|
EfiCpuFlushTypeWriteBackInvalidate,
|
|
EfiCpuFlushTypeWriteBack,
|
|
EfiCpuFlushTypeInvalidate,
|
|
EfiCpuMaxFlushType
|
|
} EFI_CPU_FLUSH_TYPE;
|
|
|
|
///
|
|
/// The type of processor INIT.
|
|
///
|
|
typedef enum {
|
|
EfiCpuInit,
|
|
EfiCpuMaxInitType
|
|
} EFI_CPU_INIT_TYPE;
|
|
|
|
/**
|
|
EFI_CPU_INTERRUPT_HANDLER that is called when a processor interrupt occurs.
|
|
|
|
@param InterruptType Defines the type of interrupt or exception that
|
|
occurred on the processor.This parameter is processor architecture specific.
|
|
@param SystemContext A pointer to the processor context when
|
|
the interrupt occurred on the processor.
|
|
|
|
@return None
|
|
|
|
**/
|
|
typedef
|
|
VOID
|
|
(EFIAPI *EFI_CPU_INTERRUPT_HANDLER)(
|
|
IN CONST EFI_EXCEPTION_TYPE InterruptType,
|
|
IN CONST EFI_SYSTEM_CONTEXT SystemContext
|
|
);
|
|
|
|
/**
|
|
This function flushes the range of addresses from Start to Start+Length
|
|
from the processor's data cache. If Start is not aligned to a cache line
|
|
boundary, then the bytes before Start to the preceding cache line boundary
|
|
are also flushed. If Start+Length is not aligned to a cache line boundary,
|
|
then the bytes past Start+Length to the end of the next cache line boundary
|
|
are also flushed. The FlushType of EfiCpuFlushTypeWriteBackInvalidate must be
|
|
supported. If the data cache is fully coherent with all DMA operations, then
|
|
this function can just return EFI_SUCCESS. If the processor does not support
|
|
flushing a range of the data cache, then the entire data cache can be flushed.
|
|
|
|
@param This The EFI_CPU_ARCH_PROTOCOL instance.
|
|
@param Start The beginning physical address to flush from the processor's data
|
|
cache.
|
|
@param Length The number of bytes to flush from the processor's data cache. This
|
|
function may flush more bytes than Length specifies depending upon
|
|
the granularity of the flush operation that the processor supports.
|
|
@param FlushType Specifies the type of flush operation to perform.
|
|
|
|
@retval EFI_SUCCESS The address range from Start to Start+Length was flushed from
|
|
the processor's data cache.
|
|
@retval EFI_UNSUPPORTED The processor does not support the cache flush type specified
|
|
by FlushType.
|
|
@retval EFI_DEVICE_ERROR The address range from Start to Start+Length could not be flushed
|
|
from the processor's data cache.
|
|
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_CPU_FLUSH_DATA_CACHE)(
|
|
IN EFI_CPU_ARCH_PROTOCOL *This,
|
|
IN EFI_PHYSICAL_ADDRESS Start,
|
|
IN UINT64 Length,
|
|
IN EFI_CPU_FLUSH_TYPE FlushType
|
|
);
|
|
|
|
|
|
/**
|
|
This function enables interrupt processing by the processor.
|
|
|
|
@param This The EFI_CPU_ARCH_PROTOCOL instance.
|
|
|
|
@retval EFI_SUCCESS Interrupts are enabled on the processor.
|
|
@retval EFI_DEVICE_ERROR Interrupts could not be enabled on the processor.
|
|
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_CPU_ENABLE_INTERRUPT)(
|
|
IN EFI_CPU_ARCH_PROTOCOL *This
|
|
);
|
|
|
|
|
|
/**
|
|
This function disables interrupt processing by the processor.
|
|
|
|
@param This The EFI_CPU_ARCH_PROTOCOL instance.
|
|
|
|
@retval EFI_SUCCESS Interrupts are disabled on the processor.
|
|
@retval EFI_DEVICE_ERROR Interrupts could not be disabled on the processor.
|
|
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_CPU_DISABLE_INTERRUPT)(
|
|
IN EFI_CPU_ARCH_PROTOCOL *This
|
|
);
|
|
|
|
|
|
/**
|
|
This function retrieves the processor's current interrupt state a returns it in
|
|
State. If interrupts are currently enabled, then TRUE is returned. If interrupts
|
|
are currently disabled, then FALSE is returned.
|
|
|
|
@param This The EFI_CPU_ARCH_PROTOCOL instance.
|
|
@param State A pointer to the processor's current interrupt state. Set to TRUE if
|
|
interrupts are enabled and FALSE if interrupts are disabled.
|
|
|
|
@retval EFI_SUCCESS The processor's current interrupt state was returned in State.
|
|
@retval EFI_INVALID_PARAMETER State is NULL.
|
|
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_CPU_GET_INTERRUPT_STATE)(
|
|
IN EFI_CPU_ARCH_PROTOCOL *This,
|
|
OUT BOOLEAN *State
|
|
);
|
|
|
|
|
|
/**
|
|
This function generates an INIT on the processor. If this function succeeds, then the
|
|
processor will be reset, and control will not be returned to the caller. If InitType is
|
|
not supported by this processor, or the processor cannot programmatically generate an
|
|
INIT without help from external hardware, then EFI_UNSUPPORTED is returned. If an error
|
|
occurs attempting to generate an INIT, then EFI_DEVICE_ERROR is returned.
|
|
|
|
@param This The EFI_CPU_ARCH_PROTOCOL instance.
|
|
@param InitType The type of processor INIT to perform.
|
|
|
|
@retval EFI_SUCCESS The processor INIT was performed. This return code should never be seen.
|
|
@retval EFI_UNSUPPORTED The processor INIT operation specified by InitType is not supported
|
|
by this processor.
|
|
@retval EFI_DEVICE_ERROR The processor INIT failed.
|
|
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_CPU_INIT)(
|
|
IN EFI_CPU_ARCH_PROTOCOL *This,
|
|
IN EFI_CPU_INIT_TYPE InitType
|
|
);
|
|
|
|
|
|
/**
|
|
This function registers and enables the handler specified by InterruptHandler for a processor
|
|
interrupt or exception type specified by InterruptType. If InterruptHandler is NULL, then the
|
|
handler for the processor interrupt or exception type specified by InterruptType is uninstalled.
|
|
The installed handler is called once for each processor interrupt or exception.
|
|
|
|
@param This The EFI_CPU_ARCH_PROTOCOL instance.
|
|
@param InterruptType A pointer to the processor's current interrupt state. Set to TRUE if interrupts
|
|
are enabled and FALSE if interrupts are disabled.
|
|
@param InterruptHandler A pointer to a function of type EFI_CPU_INTERRUPT_HANDLER that is called
|
|
when a processor interrupt occurs. If this parameter is NULL, then the handler
|
|
will be uninstalled.
|
|
|
|
@retval EFI_SUCCESS The handler for the processor interrupt was successfully 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.
|
|
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_CPU_REGISTER_INTERRUPT_HANDLER)(
|
|
IN EFI_CPU_ARCH_PROTOCOL *This,
|
|
IN EFI_EXCEPTION_TYPE InterruptType,
|
|
IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler
|
|
);
|
|
|
|
|
|
/**
|
|
This function reads the processor timer specified by TimerIndex and returns it in TimerValue.
|
|
|
|
@param This The EFI_CPU_ARCH_PROTOCOL instance.
|
|
@param TimerIndex Specifies which processor timer is to be returned in TimerValue. This parameter
|
|
must be between 0 and NumberOfTimers-1.
|
|
@param TimerValue Pointer to the returned timer value.
|
|
@param TimerPeriod A pointer to the amount of time that passes in femtoseconds for each increment
|
|
of TimerValue. If TimerValue does not increment at a predictable rate, then 0 is
|
|
returned. This parameter is optional and may be NULL.
|
|
|
|
@retval EFI_SUCCESS The processor timer value specified by TimerIndex was returned in TimerValue.
|
|
@retval EFI_DEVICE_ERROR An error occurred attempting to read one of the processor's timers.
|
|
@retval EFI_INVALID_PARAMETER TimerValue is NULL or TimerIndex is not valid.
|
|
@retval EFI_UNSUPPORTED The processor does not have any readable timers.
|
|
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_CPU_GET_TIMER_VALUE)(
|
|
IN EFI_CPU_ARCH_PROTOCOL *This,
|
|
IN UINT32 TimerIndex,
|
|
OUT UINT64 *TimerValue,
|
|
OUT UINT64 *TimerPeriod OPTIONAL
|
|
);
|
|
|
|
|
|
/**
|
|
This function modifies the attributes for the memory region specified by BaseAddress and
|
|
Length from their current attributes to the attributes specified by Attributes.
|
|
|
|
@param This The EFI_CPU_ARCH_PROTOCOL instance.
|
|
@param BaseAddress The physical address that is the start address of a memory region.
|
|
@param Length The size in bytes of the memory region.
|
|
@param Attributes The bit mask of attributes to set for the memory region.
|
|
|
|
@retval EFI_SUCCESS The attributes were set for the memory region.
|
|
@retval EFI_ACCESS_DENIED The attributes for the memory resource range specified by
|
|
BaseAddress and Length cannot be modified.
|
|
@retval EFI_INVALID_PARAMETER Length is zero.
|
|
Attributes specified an illegal combination of attributes that
|
|
cannot be set together.
|
|
@retval EFI_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of
|
|
the memory resource range.
|
|
@retval EFI_UNSUPPORTED The processor does not support one or more bytes of the memory
|
|
resource range specified by BaseAddress and Length.
|
|
The bit mask of attributes is not support for the memory resource
|
|
range specified by BaseAddress and Length.
|
|
|
|
**/
|
|
typedef
|
|
EFI_STATUS
|
|
(EFIAPI *EFI_CPU_SET_MEMORY_ATTRIBUTES)(
|
|
IN EFI_CPU_ARCH_PROTOCOL *This,
|
|
IN EFI_PHYSICAL_ADDRESS BaseAddress,
|
|
IN UINT64 Length,
|
|
IN UINT64 Attributes
|
|
);
|
|
|
|
|
|
///
|
|
/// The EFI_CPU_ARCH_PROTOCOL is used to abstract processor-specific functions from the DXE
|
|
/// Foundation. This includes flushing caches, enabling and disabling interrupts, hooking interrupt
|
|
/// vectors and exception vectors, reading internal processor timers, resetting the processor, and
|
|
/// determining the processor frequency.
|
|
///
|
|
struct _EFI_CPU_ARCH_PROTOCOL {
|
|
EFI_CPU_FLUSH_DATA_CACHE FlushDataCache;
|
|
EFI_CPU_ENABLE_INTERRUPT EnableInterrupt;
|
|
EFI_CPU_DISABLE_INTERRUPT DisableInterrupt;
|
|
EFI_CPU_GET_INTERRUPT_STATE GetInterruptState;
|
|
EFI_CPU_INIT Init;
|
|
EFI_CPU_REGISTER_INTERRUPT_HANDLER RegisterInterruptHandler;
|
|
EFI_CPU_GET_TIMER_VALUE GetTimerValue;
|
|
EFI_CPU_SET_MEMORY_ATTRIBUTES SetMemoryAttributes;
|
|
///
|
|
/// The number of timers that are available in a processor. The value in this
|
|
/// field is a constant that must not be modified after the CPU Architectural
|
|
/// Protocol is installed. All consumers must treat this as a read-only field.
|
|
///
|
|
UINT32 NumberOfTimers;
|
|
///
|
|
/// The size, in bytes, of the alignment required for DMA buffer allocations.
|
|
/// This is typically the size of the largest data cache line in the platform.
|
|
/// The value in this field is a constant that must not be modified after the
|
|
/// CPU Architectural Protocol is installed. All consumers must treat this as
|
|
/// a read-only field.
|
|
///
|
|
UINT32 DmaBufferAlignment;
|
|
};
|
|
|
|
extern EFI_GUID gEfiCpuArchProtocolGuid;
|
|
|
|
#endif
|