mirror of https://github.com/acidanthera/audk.git
836 lines
23 KiB
C
836 lines
23 KiB
C
/** @file
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I/O Library. The implementations are based on EFI_PEI_SERVICE->CpuIo interface.
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Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
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Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php.
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <PiPei.h>
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#include <Library/IoLib.h>
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#include <Library/DebugLib.h>
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#include <Library/BaseLib.h>
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#include <Library/PeiServicesTablePointerLib.h>
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/**
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Reads registers in the EFI CPU I/O space.
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Reads the I/O port specified by Port with registers width specified by Width.
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The port is read Count times, and the read data is stored in the provided Buffer.
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This function must guarantee that all I/O read and write operations are serialized.
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If such operations are not supported, then ASSERT().
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@param Port The base address of the I/O operation.
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The caller is responsible for aligning the Address if required.
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@param Width The width of the I/O operation.
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@param Count The number of times to read I/O port.
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@param Buffer The buffer to store the read data into.
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**/
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VOID
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EFIAPI
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IoReadFifoWorker (
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IN UINTN Port,
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IN EFI_PEI_CPU_IO_PPI_WIDTH Width,
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IN UINTN Count,
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IN VOID *Buffer
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)
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{
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CONST EFI_PEI_SERVICES **PeiServices;
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EFI_PEI_CPU_IO_PPI *CpuIo;
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EFI_STATUS Status;
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PeiServices = GetPeiServicesTablePointer ();
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CpuIo = (*PeiServices)->CpuIo;
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ASSERT (CpuIo != NULL);
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Status = CpuIo->Io.Read (PeiServices, CpuIo, Width, Port, Count, Buffer);
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ASSERT_EFI_ERROR (Status);
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}
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/**
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Writes registers in the EFI CPU I/O space.
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Writes the I/O port specified by Port with registers width specified by Width.
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The port is written Count times, and the write data is retrieved from the provided Buffer.
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This function must guarantee that all I/O read and write operations are serialized.
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If such operations are not supported, then ASSERT().
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@param Port The base address of the I/O operation.
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The caller is responsible for aligning the Address if required.
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@param Width The width of the I/O operation.
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@param Count The number of times to write I/O port.
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@param Buffer The buffer to store the read data into.
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**/
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VOID
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EFIAPI
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IoWriteFifoWorker (
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IN UINTN Port,
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IN EFI_PEI_CPU_IO_PPI_WIDTH Width,
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IN UINTN Count,
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IN VOID *Buffer
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)
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{
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CONST EFI_PEI_SERVICES **PeiServices;
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EFI_PEI_CPU_IO_PPI *CpuIo;
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EFI_STATUS Status;
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PeiServices = GetPeiServicesTablePointer ();
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CpuIo = (*PeiServices)->CpuIo;
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ASSERT (CpuIo != NULL);
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Status = CpuIo->Io.Write (PeiServices, CpuIo, Width, Port, Count, Buffer);
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ASSERT_EFI_ERROR (Status);
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}
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/**
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Reads an 8-bit I/O port.
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Reads the 8-bit I/O port specified by Port. The 8-bit read value is returned.
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This function must guarantee that all I/O read and write operations are
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serialized.
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If 8-bit I/O port operations are not supported, then ASSERT().
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@param Port The I/O port to read.
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@return The value read.
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**/
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UINT8
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EFIAPI
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IoRead8 (
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IN UINTN Port
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)
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{
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CONST EFI_PEI_SERVICES **PeiServices;
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EFI_PEI_CPU_IO_PPI *CpuIo;
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PeiServices = GetPeiServicesTablePointer ();
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CpuIo = (*PeiServices)->CpuIo;
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ASSERT (CpuIo != NULL);
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return CpuIo->IoRead8 (PeiServices, CpuIo, (UINT64) Port);
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}
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/**
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Writes an 8-bit I/O port.
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Writes the 8-bit I/O port specified by Port with the value specified by Value
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and returns Value. This function must guarantee that all I/O read and write
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operations are serialized.
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If 8-bit I/O port operations are not supported, then ASSERT().
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@param Port The I/O port to write.
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@param Value The value to write to the I/O port.
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@return The value written the I/O port.
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**/
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UINT8
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EFIAPI
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IoWrite8 (
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IN UINTN Port,
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IN UINT8 Value
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)
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{
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CONST EFI_PEI_SERVICES **PeiServices;
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EFI_PEI_CPU_IO_PPI *CpuIo;
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PeiServices = GetPeiServicesTablePointer ();
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CpuIo = (*PeiServices)->CpuIo;
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ASSERT (CpuIo != NULL);
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CpuIo->IoWrite8 (PeiServices, CpuIo, (UINT64) Port, Value);
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return Value;
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}
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/**
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Reads a 16-bit I/O port.
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Reads the 16-bit I/O port specified by Port. The 16-bit read value is returned.
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This function must guarantee that all I/O read and write operations are
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serialized.
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If 16-bit I/O port operations are not supported, then ASSERT().
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If Port is not aligned on a 16-bit boundary, then ASSERT().
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@param Port The I/O port to read.
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@return The value read.
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**/
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UINT16
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EFIAPI
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IoRead16 (
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IN UINTN Port
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)
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{
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CONST EFI_PEI_SERVICES **PeiServices;
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EFI_PEI_CPU_IO_PPI *CpuIo;
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PeiServices = GetPeiServicesTablePointer ();
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CpuIo = (*PeiServices)->CpuIo;
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ASSERT (CpuIo != NULL);
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//
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// Make sure Port is aligned on a 16-bit boundary.
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//
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ASSERT ((Port & 1) == 0);
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return CpuIo->IoRead16 (PeiServices, CpuIo, (UINT64) Port);
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}
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/**
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Writes a 16-bit I/O port.
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Writes the 16-bit I/O port specified by Port with the value specified by Value
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and returns Value. This function must guarantee that all I/O read and write
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operations are serialized.
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If 16-bit I/O port operations are not supported, then ASSERT().
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If Port is not aligned on a 16-bit boundary, then ASSERT().
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@param Port The I/O port to write.
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@param Value The value to write to the I/O port.
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@return The value written the I/O port.
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**/
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UINT16
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EFIAPI
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IoWrite16 (
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IN UINTN Port,
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IN UINT16 Value
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)
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{
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CONST EFI_PEI_SERVICES **PeiServices;
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EFI_PEI_CPU_IO_PPI *CpuIo;
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PeiServices = GetPeiServicesTablePointer ();
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CpuIo = (*PeiServices)->CpuIo;
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ASSERT (CpuIo != NULL);
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//
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// Make sure Port is aligned on a 16-bit boundary.
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//
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ASSERT ((Port & 1) == 0);
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CpuIo->IoWrite16 (PeiServices, CpuIo, (UINT64) Port, Value);
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return Value;
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}
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/**
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Reads a 32-bit I/O port.
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Reads the 32-bit I/O port specified by Port. The 32-bit read value is returned.
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This function must guarantee that all I/O read and write operations are
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serialized.
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If 32-bit I/O port operations are not supported, then ASSERT().
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If Port is not aligned on a 32-bit boundary, then ASSERT().
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@param Port The I/O port to read.
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@return The value read.
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**/
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UINT32
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EFIAPI
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IoRead32 (
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IN UINTN Port
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)
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{
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CONST EFI_PEI_SERVICES **PeiServices;
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EFI_PEI_CPU_IO_PPI *CpuIo;
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PeiServices = GetPeiServicesTablePointer ();
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CpuIo = (*PeiServices)->CpuIo;
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ASSERT (CpuIo != NULL);
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//
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// Make sure Port is aligned on a 32-bit boundary.
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//
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ASSERT ((Port & 3) == 0);
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return CpuIo->IoRead32 (PeiServices, CpuIo, (UINT64) Port);
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}
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/**
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Writes a 32-bit I/O port.
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Writes the 32-bit I/O port specified by Port with the value specified by Value
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and returns Value. This function must guarantee that all I/O read and write
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operations are serialized.
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If 32-bit I/O port operations are not supported, then ASSERT().
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If Port is not aligned on a 32-bit boundary, then ASSERT().
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@param Port The I/O port to write.
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@param Value The value to write to the I/O port.
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@return The value written the I/O port.
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**/
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UINT32
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EFIAPI
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IoWrite32 (
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IN UINTN Port,
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IN UINT32 Value
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)
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{
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CONST EFI_PEI_SERVICES **PeiServices;
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EFI_PEI_CPU_IO_PPI *CpuIo;
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PeiServices = GetPeiServicesTablePointer ();
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CpuIo = (*PeiServices)->CpuIo;
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ASSERT (CpuIo != NULL);
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//
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// Make sure Port is aligned on a 32-bit boundary.
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//
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ASSERT ((Port & 3) == 0);
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CpuIo->IoWrite32 (PeiServices, CpuIo, (UINT64) Port, Value);
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return Value;
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}
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/**
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Reads a 64-bit I/O port.
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Reads the 64-bit I/O port specified by Port. The 64-bit read value is returned.
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This function must guarantee that all I/O read and write operations are
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serialized.
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If 64-bit I/O port operations are not supported, then ASSERT().
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If Port is not aligned on a 64-bit boundary, then ASSERT().
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@param Port The I/O port to read.
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@return The value read.
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**/
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UINT64
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EFIAPI
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IoRead64 (
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IN UINTN Port
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)
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{
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CONST EFI_PEI_SERVICES **PeiServices;
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EFI_PEI_CPU_IO_PPI *CpuIo;
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PeiServices = GetPeiServicesTablePointer ();
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CpuIo = (*PeiServices)->CpuIo;
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ASSERT (CpuIo != NULL);
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//
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// Make sure Port is aligned on a 64-bit boundary.
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//
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ASSERT ((Port & 7) == 0);
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return CpuIo->IoRead64 (PeiServices, CpuIo, (UINT64) Port);
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}
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/**
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Writes a 64-bit I/O port.
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Writes the 64-bit I/O port specified by Port with the value specified by Value
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and returns Value. This function must guarantee that all I/O read and write
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operations are serialized.
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If 64-bit I/O port operations are not supported, then ASSERT().
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If Port is not aligned on a 64-bit boundary, then ASSERT().
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@param Port The I/O port to write.
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@param Value The value to write to the I/O port.
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@return The value written the I/O port.
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**/
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UINT64
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EFIAPI
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IoWrite64 (
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IN UINTN Port,
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IN UINT64 Value
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)
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{
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CONST EFI_PEI_SERVICES **PeiServices;
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EFI_PEI_CPU_IO_PPI *CpuIo;
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PeiServices = GetPeiServicesTablePointer ();
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CpuIo = (*PeiServices)->CpuIo;
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ASSERT (CpuIo != NULL);
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//
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// Make sure Port is aligned on a 64-bit boundary.
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//
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ASSERT ((Port & 7) == 0);
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CpuIo->IoWrite64 (PeiServices, CpuIo, (UINT64) Port, Value);
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return Value;;
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}
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/**
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Reads an 8-bit I/O port fifo into a block of memory.
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Reads the 8-bit I/O fifo port specified by Port.
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The port is read Count times, and the read data is
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stored in the provided Buffer.
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This function must guarantee that all I/O read and write operations are
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serialized.
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If 8-bit I/O port operations are not supported, then ASSERT().
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@param Port The I/O port to read.
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@param Count The number of times to read I/O port.
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@param Buffer The buffer to store the read data into.
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**/
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VOID
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EFIAPI
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IoReadFifo8 (
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IN UINTN Port,
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IN UINTN Count,
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OUT VOID *Buffer
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)
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{
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IoReadFifoWorker (Port, EfiPeiCpuIoWidthFifoUint8, Count, Buffer);
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}
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/**
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Writes a block of memory into an 8-bit I/O port fifo.
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Writes the 8-bit I/O fifo port specified by Port.
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The port is written Count times, and the write data is
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retrieved from the provided Buffer.
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This function must guarantee that all I/O write and write operations are
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serialized.
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If 8-bit I/O port operations are not supported, then ASSERT().
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@param Port The I/O port to write.
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@param Count The number of times to write I/O port.
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@param Buffer The buffer to retrieve the write data from.
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**/
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VOID
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EFIAPI
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IoWriteFifo8 (
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IN UINTN Port,
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IN UINTN Count,
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IN VOID *Buffer
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)
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{
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IoWriteFifoWorker (Port, EfiPeiCpuIoWidthFifoUint8, Count, Buffer);
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}
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/**
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Reads a 16-bit I/O port fifo into a block of memory.
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Reads the 16-bit I/O fifo port specified by Port.
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The port is read Count times, and the read data is
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stored in the provided Buffer.
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This function must guarantee that all I/O read and write operations are
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serialized.
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If 16-bit I/O port operations are not supported, then ASSERT().
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@param Port The I/O port to read.
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@param Count The number of times to read I/O port.
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@param Buffer The buffer to store the read data into.
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**/
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VOID
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EFIAPI
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IoReadFifo16 (
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IN UINTN Port,
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IN UINTN Count,
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OUT VOID *Buffer
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)
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{
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//
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// Make sure Port is aligned on a 16-bit boundary.
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//
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ASSERT ((Port & 1) == 0);
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IoReadFifoWorker (Port, EfiPeiCpuIoWidthFifoUint16, Count, Buffer);
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}
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/**
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Writes a block of memory into a 16-bit I/O port fifo.
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Writes the 16-bit I/O fifo port specified by Port.
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The port is written Count times, and the write data is
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retrieved from the provided Buffer.
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This function must guarantee that all I/O write and write operations are
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serialized.
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If 16-bit I/O port operations are not supported, then ASSERT().
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@param Port The I/O port to write.
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@param Count The number of times to write I/O port.
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@param Buffer The buffer to retrieve the write data from.
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**/
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VOID
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EFIAPI
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IoWriteFifo16 (
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IN UINTN Port,
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IN UINTN Count,
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IN VOID *Buffer
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)
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{
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//
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// Make sure Port is aligned on a 16-bit boundary.
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//
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ASSERT ((Port & 1) == 0);
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IoWriteFifoWorker (Port, EfiPeiCpuIoWidthFifoUint16, Count, Buffer);
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}
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/**
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Reads a 32-bit I/O port fifo into a block of memory.
|
|
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Reads the 32-bit I/O fifo port specified by Port.
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|
The port is read Count times, and the read data is
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stored in the provided Buffer.
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|
|
|
This function must guarantee that all I/O read and write operations are
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serialized.
|
|
|
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If 32-bit I/O port operations are not supported, then ASSERT().
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|
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@param Port The I/O port to read.
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@param Count The number of times to read I/O port.
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@param Buffer The buffer to store the read data into.
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**/
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VOID
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EFIAPI
|
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IoReadFifo32 (
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IN UINTN Port,
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IN UINTN Count,
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OUT VOID *Buffer
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)
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{
|
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//
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// Make sure Port is aligned on a 32-bit boundary.
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//
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ASSERT ((Port & 3) == 0);
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IoReadFifoWorker (Port, EfiPeiCpuIoWidthFifoUint32, Count, Buffer);
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}
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|
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/**
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Writes a block of memory into a 32-bit I/O port fifo.
|
|
|
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Writes the 32-bit I/O fifo port specified by Port.
|
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The port is written Count times, and the write data is
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retrieved from the provided Buffer.
|
|
|
|
This function must guarantee that all I/O write and write operations are
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serialized.
|
|
|
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If 32-bit I/O port operations are not supported, then ASSERT().
|
|
|
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@param Port The I/O port to write.
|
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@param Count The number of times to write I/O port.
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@param Buffer The buffer to retrieve the write data from.
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**/
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VOID
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EFIAPI
|
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IoWriteFifo32 (
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IN UINTN Port,
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IN UINTN Count,
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IN VOID *Buffer
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)
|
|
{
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//
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// Make sure Port is aligned on a 32-bit boundary.
|
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//
|
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ASSERT ((Port & 3) == 0);
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IoWriteFifoWorker (Port, EfiPeiCpuIoWidthFifoUint32, Count, Buffer);
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}
|
|
|
|
/**
|
|
Reads an 8-bit MMIO register.
|
|
|
|
Reads the 8-bit MMIO register specified by Address. The 8-bit read value is
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returned. This function must guarantee that all MMIO read and write
|
|
operations are serialized.
|
|
|
|
If 8-bit MMIO register operations are not supported, then ASSERT().
|
|
|
|
@param Address The MMIO register to read.
|
|
|
|
@return The value read.
|
|
|
|
**/
|
|
UINT8
|
|
EFIAPI
|
|
MmioRead8 (
|
|
IN UINTN Address
|
|
)
|
|
{
|
|
CONST EFI_PEI_SERVICES **PeiServices;
|
|
EFI_PEI_CPU_IO_PPI *CpuIo;
|
|
|
|
PeiServices = GetPeiServicesTablePointer ();
|
|
CpuIo = (*PeiServices)->CpuIo;
|
|
ASSERT (CpuIo != NULL);
|
|
|
|
return CpuIo->MemRead8 (PeiServices, CpuIo, (UINT64) Address);
|
|
}
|
|
|
|
/**
|
|
Writes an 8-bit MMIO register.
|
|
|
|
Writes the 8-bit MMIO register specified by Address with the value specified
|
|
by Value and returns Value. This function must guarantee that all MMIO read
|
|
and write operations are serialized.
|
|
|
|
If 8-bit MMIO register operations are not supported, then ASSERT().
|
|
|
|
@param Address The MMIO register to write.
|
|
@param Value The value to write to the MMIO register.
|
|
|
|
@return Value.
|
|
|
|
**/
|
|
UINT8
|
|
EFIAPI
|
|
MmioWrite8 (
|
|
IN UINTN Address,
|
|
IN UINT8 Value
|
|
)
|
|
{
|
|
CONST EFI_PEI_SERVICES **PeiServices;
|
|
EFI_PEI_CPU_IO_PPI *CpuIo;
|
|
|
|
PeiServices = GetPeiServicesTablePointer ();
|
|
CpuIo = (*PeiServices)->CpuIo;
|
|
ASSERT (CpuIo != NULL);
|
|
|
|
CpuIo->MemWrite8 (PeiServices, CpuIo, (UINT64) Address, Value);
|
|
return Value;
|
|
}
|
|
|
|
/**
|
|
Reads a 16-bit MMIO register.
|
|
|
|
Reads the 16-bit MMIO register specified by Address. The 16-bit read value is
|
|
returned. This function must guarantee that all MMIO read and write
|
|
operations are serialized.
|
|
|
|
If 16-bit MMIO register operations are not supported, then ASSERT().
|
|
If Address is not aligned on a 16-bit boundary, then ASSERT().
|
|
|
|
@param Address The MMIO register to read.
|
|
|
|
@return The value read.
|
|
|
|
**/
|
|
UINT16
|
|
EFIAPI
|
|
MmioRead16 (
|
|
IN UINTN Address
|
|
)
|
|
{
|
|
CONST EFI_PEI_SERVICES **PeiServices;
|
|
EFI_PEI_CPU_IO_PPI *CpuIo;
|
|
|
|
PeiServices = GetPeiServicesTablePointer ();
|
|
CpuIo = (*PeiServices)->CpuIo;
|
|
ASSERT (CpuIo != NULL);
|
|
//
|
|
// Make sure Address is aligned on a 16-bit boundary.
|
|
//
|
|
ASSERT ((Address & 1) == 0);
|
|
return CpuIo->MemRead16 (PeiServices, CpuIo, (UINT64) Address);
|
|
|
|
}
|
|
|
|
/**
|
|
Writes a 16-bit MMIO register.
|
|
|
|
Writes the 16-bit MMIO register specified by Address with the value specified
|
|
by Value and returns Value. This function must guarantee that all MMIO read
|
|
and write operations are serialized.
|
|
|
|
If 16-bit MMIO register operations are not supported, then ASSERT().
|
|
If Address is not aligned on a 16-bit boundary, then ASSERT().
|
|
|
|
@param Address The MMIO register to write.
|
|
@param Value The value to write to the MMIO register.
|
|
|
|
@return Value.
|
|
|
|
**/
|
|
UINT16
|
|
EFIAPI
|
|
MmioWrite16 (
|
|
IN UINTN Address,
|
|
IN UINT16 Value
|
|
)
|
|
{
|
|
CONST EFI_PEI_SERVICES **PeiServices;
|
|
EFI_PEI_CPU_IO_PPI *CpuIo;
|
|
|
|
PeiServices = GetPeiServicesTablePointer ();
|
|
CpuIo = (*PeiServices)->CpuIo;
|
|
ASSERT (CpuIo != NULL);
|
|
//
|
|
// Make sure Address is aligned on a 16-bit boundary.
|
|
//
|
|
ASSERT ((Address & 1) == 0);
|
|
CpuIo->MemWrite16 (PeiServices, CpuIo, (UINT64) Address, Value);
|
|
return Value;
|
|
}
|
|
|
|
/**
|
|
Reads a 32-bit MMIO register.
|
|
|
|
Reads the 32-bit MMIO register specified by Address. The 32-bit read value is
|
|
returned. This function must guarantee that all MMIO read and write
|
|
operations are serialized.
|
|
|
|
If 32-bit MMIO register operations are not supported, then ASSERT().
|
|
If Address is not aligned on a 32-bit boundary, then ASSERT().
|
|
|
|
@param Address The MMIO register to read.
|
|
|
|
@return The value read.
|
|
|
|
**/
|
|
UINT32
|
|
EFIAPI
|
|
MmioRead32 (
|
|
IN UINTN Address
|
|
)
|
|
{
|
|
CONST EFI_PEI_SERVICES **PeiServices;
|
|
EFI_PEI_CPU_IO_PPI *CpuIo;
|
|
|
|
PeiServices = GetPeiServicesTablePointer ();
|
|
CpuIo = (*PeiServices)->CpuIo;
|
|
ASSERT (CpuIo != NULL);
|
|
//
|
|
// Make sure Address is aligned on a 32-bit boundary.
|
|
//
|
|
ASSERT ((Address & 3) == 0);
|
|
return CpuIo->MemRead32 (PeiServices, CpuIo, (UINT64) Address);
|
|
|
|
}
|
|
|
|
/**
|
|
Writes a 32-bit MMIO register.
|
|
|
|
Writes the 32-bit MMIO register specified by Address with the value specified
|
|
by Value and returns Value. This function must guarantee that all MMIO read
|
|
and write operations are serialized.
|
|
|
|
If 32-bit MMIO register operations are not supported, then ASSERT().
|
|
If Address is not aligned on a 32-bit boundary, then ASSERT().
|
|
|
|
@param Address The MMIO register to write.
|
|
@param Value The value to write to the MMIO register.
|
|
|
|
@return Value.
|
|
|
|
**/
|
|
UINT32
|
|
EFIAPI
|
|
MmioWrite32 (
|
|
IN UINTN Address,
|
|
IN UINT32 Value
|
|
)
|
|
{
|
|
CONST EFI_PEI_SERVICES **PeiServices;
|
|
EFI_PEI_CPU_IO_PPI *CpuIo;
|
|
|
|
PeiServices = GetPeiServicesTablePointer ();
|
|
CpuIo = (*PeiServices)->CpuIo;
|
|
ASSERT (CpuIo != NULL);
|
|
//
|
|
// Make sure Address is aligned on a 32-bit boundary.
|
|
//
|
|
ASSERT ((Address & 3) == 0);
|
|
CpuIo->MemWrite32 (PeiServices, CpuIo, (UINT64) Address, Value);
|
|
return Value;
|
|
}
|
|
|
|
/**
|
|
Reads a 64-bit MMIO register.
|
|
|
|
Reads the 64-bit MMIO register specified by Address. The 64-bit read value is
|
|
returned. This function must guarantee that all MMIO read and write
|
|
operations are serialized.
|
|
|
|
If 64-bit MMIO register operations are not supported, then ASSERT().
|
|
If Address is not aligned on a 64-bit boundary, then ASSERT().
|
|
|
|
@param Address The MMIO register to read.
|
|
|
|
@return The value read.
|
|
|
|
**/
|
|
UINT64
|
|
EFIAPI
|
|
MmioRead64 (
|
|
IN UINTN Address
|
|
)
|
|
{
|
|
CONST EFI_PEI_SERVICES **PeiServices;
|
|
EFI_PEI_CPU_IO_PPI *CpuIo;
|
|
|
|
PeiServices = GetPeiServicesTablePointer ();
|
|
CpuIo = (*PeiServices)->CpuIo;
|
|
ASSERT (CpuIo != NULL);
|
|
//
|
|
// Make sure Address is aligned on a 64-bit boundary.
|
|
//
|
|
ASSERT ((Address & (sizeof (UINT64) - 1)) == 0);
|
|
return CpuIo->MemRead64 (PeiServices, CpuIo, (UINT64) Address);
|
|
|
|
}
|
|
|
|
/**
|
|
Writes a 64-bit MMIO register.
|
|
|
|
Writes the 64-bit MMIO register specified by Address with the value specified
|
|
by Value and returns Value. This function must guarantee that all MMIO read
|
|
and write operations are serialized.
|
|
|
|
If 64-bit MMIO register operations are not supported, then ASSERT().
|
|
If Address is not aligned on a 64-bit boundary, then ASSERT().
|
|
|
|
@param Address The MMIO register to write.
|
|
@param Value The value to write to the MMIO register.
|
|
|
|
**/
|
|
UINT64
|
|
EFIAPI
|
|
MmioWrite64 (
|
|
IN UINTN Address,
|
|
IN UINT64 Value
|
|
)
|
|
{
|
|
CONST EFI_PEI_SERVICES **PeiServices;
|
|
EFI_PEI_CPU_IO_PPI *CpuIo;
|
|
|
|
PeiServices = GetPeiServicesTablePointer ();
|
|
CpuIo = (*PeiServices)->CpuIo;
|
|
ASSERT (CpuIo != NULL);
|
|
//
|
|
// Make sure Address is aligned on a 64-bit boundary.
|
|
//
|
|
ASSERT ((Address & 7) == 0);
|
|
CpuIo->MemWrite64 (PeiServices, CpuIo, (UINT64) Address, Value);
|
|
return Value;
|
|
}
|