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/** @file
CPU DXE MP support
Copyright (c) 2006 - 2014, 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_MP_H_
#define _CPU_MP_H_
#include <Protocol/MpService.h>
#include <Library/SynchronizationLib.h>
/**
Initialize Multi-processor support.
**/
VOID
InitializeMpSupport (
VOID
);
typedef
VOID
(EFIAPI *STACKLESS_AP_ENTRY_POINT)(
VOID
);
/**
Starts the Application Processors and directs them to jump to the
specified routine.
The processor jumps to this code in flat mode, but the processor's
stack is not initialized.
@param ApEntryPoint Pointer to the Entry Point routine
@retval EFI_SUCCESS The APs were started
@retval EFI_OUT_OF_RESOURCES Cannot allocate memory to start APs
**/
EFI_STATUS
StartApsStackless (
IN STACKLESS_AP_ENTRY_POINT ApEntryPoint
);
/**
The AP entry point that the Startup-IPI target code will jump to.
The processor jumps to this code in flat mode, but the processor's
stack is not initialized.
**/
VOID
EFIAPI
AsmApEntryPoint (
VOID
);
/**
Releases the lock preventing other APs from using the shared AP
stack.
Once the AP has transitioned to using a new stack, it can call this
function to allow another AP to proceed with using the shared stack.
**/
VOID
EFIAPI
AsmApDoneWithCommonStack (
VOID
);
typedef enum {
CpuStateIdle,
CpuStateBlocked,
CpuStateReady,
CpuStateBuzy,
CpuStateFinished
} CPU_STATE;
/**
Define Individual Processor Data block.
**/
typedef struct {
EFI_PROCESSOR_INFORMATION Info;
SPIN_LOCK CpuDataLock;
volatile CPU_STATE State;
EFI_AP_PROCEDURE Procedure;
VOID *Parameter;
} CPU_DATA_BLOCK;
/**
Define MP data block which consumes individual processor block.
**/
typedef struct {
CPU_DATA_BLOCK *CpuDatas;
UINTN NumberOfProcessors;
UINTN NumberOfEnabledProcessors;
} MP_SYSTEM_DATA;
/**
This function is called by all processors (both BSP and AP) once and collects MP related data.
@param Bsp TRUE if the CPU is BSP
@param ProcessorNumber The specific processor number
@retval EFI_SUCCESS Data for the processor collected and filled in
**/
EFI_STATUS
FillInProcessorInformation (
IN BOOLEAN Bsp,
IN UINTN ProcessorNumber
);
/**
This return the handle number for the calling processor. This service may be
called from the BSP and APs.
This service returns the processor handle number for the calling processor.
The returned value is in the range from 0 to the total number of logical
processors minus 1. The total number of logical processors can be retrieved
with EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors(). This service may be
called from the BSP and APs. If ProcessorNumber is NULL, then EFI_INVALID_PARAMETER
is returned. Otherwise, the current processors handle number is returned in
ProcessorNumber, and EFI_SUCCESS is returned.
@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance.
@param[out] ProcessorNumber The handle number of AP that is to become the new
BSP. The range is from 0 to the total number of
logical processors minus 1. The total number of
logical processors can be retrieved by
EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
@retval EFI_SUCCESS The current processor handle number was returned
in ProcessorNumber.
@retval EFI_INVALID_PARAMETER ProcessorNumber is NULL.
**/
EFI_STATUS
EFIAPI
WhoAmI (
IN EFI_MP_SERVICES_PROTOCOL *This,
OUT UINTN *ProcessorNumber
);
#endif // _CPU_MP_H_
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