mirror of https://github.com/acidanthera/audk.git
563 lines
15 KiB
C
563 lines
15 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, Intel Corporation<BR>
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All rights reserved. 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 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 from Port.
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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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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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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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@param Port The I/O port to read.
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@return The value read from Port.
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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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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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@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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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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@param Port The I/O port to read.
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@return The value read from Port.
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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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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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@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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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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@param Port The I/O port to read.
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@return The value read from Port.
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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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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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@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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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 MMIO register.
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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
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operations are serialized.
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If 8-bit MMIO register operations are not supported, then ASSERT().
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@param Address The MMIO register to read.
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@return The value read from Port.
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**/
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UINT8
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EFIAPI
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MmioRead8 (
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IN UINTN Address
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)
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{
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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->MemRead8 (PeiServices, CpuIo, (UINT64) Address);
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}
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/**
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Writes an 8-bit MMIO register.
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Writes the 8-bit MMIO register specified by Address with the value specified
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by Value and returns Value. This function must guarantee that all MMIO read
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and write operations are serialized.
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If 8-bit MMIO register operations are not supported, then ASSERT().
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@param Address The MMIO register to write.
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@param Value The value to write to the MMIO register.
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@return The Value written back to Mmio register.
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**/
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UINT8
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EFIAPI
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MmioWrite8 (
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IN UINTN Address,
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IN UINT8 Value
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)
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{
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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->MemWrite8 (PeiServices, CpuIo, (UINT64) Address, Value);
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return Value;
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}
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/**
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Reads a 16-bit MMIO register.
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Reads the 16-bit MMIO register specified by Address. The 16-bit read value is
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returned. This function must guarantee that all MMIO read and write
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operations are serialized.
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If 16-bit MMIO register operations are not supported, then ASSERT().
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@param Address The MMIO register to read.
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@return The value read from Address.
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**/
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UINT16
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EFIAPI
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MmioRead16 (
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IN UINTN Address
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)
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{
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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 Address is aligned on a 16-bit boundary.
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//
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ASSERT ((Address & 1) == 0);
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return CpuIo->MemRead16 (PeiServices, CpuIo, (UINT64) Address);
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}
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/**
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Writes a 16-bit MMIO register.
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Writes the 16-bit MMIO register specified by Address with the value specified
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by Value and returns Value. This function must guarantee that all MMIO read
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and write operations are serialized.
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If 16-bit MMIO register operations are not supported, then ASSERT().
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@param Address The MMIO register to write.
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@param Value The value to write to the MMIO register.
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@return The Value written back to Mmio register
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**/
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UINT16
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EFIAPI
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MmioWrite16 (
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IN UINTN Address,
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IN UINT16 Value
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)
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{
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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 Address is aligned on a 16-bit boundary.
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//
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ASSERT ((Address & 1) == 0);
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CpuIo->MemWrite16 (PeiServices, CpuIo, (UINT64) Address, Value);
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return Value;
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}
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/**
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Reads a 32-bit MMIO register.
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Reads the 32-bit MMIO register specified by Address. The 32-bit read value is
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returned. This function must guarantee that all MMIO read and write
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operations are serialized.
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If 32-bit MMIO register operations are not supported, then ASSERT().
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@param Address The MMIO register to read.
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@return The value read from Address.
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**/
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UINT32
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EFIAPI
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MmioRead32 (
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IN UINTN Address
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)
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{
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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 Address is aligned on a 32-bit boundary.
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//
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ASSERT ((Address & 3) == 0);
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return CpuIo->MemRead32 (PeiServices, CpuIo, (UINT64) Address);
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}
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/**
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Writes a 32-bit MMIO register.
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Writes the 32-bit MMIO register specified by Address with the value specified
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by Value and returns Value. This function must guarantee that all MMIO read
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and write operations are serialized.
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If 32-bit MMIO register operations are not supported, then ASSERT().
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@param Address The MMIO register to write.
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@param Value The value to write to the MMIO register.
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@return The Value written back to Mmio register
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**/
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UINT32
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EFIAPI
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MmioWrite32 (
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IN UINTN Address,
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IN UINT32 Value
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)
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{
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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 Address is aligned on a 32-bit boundary.
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//
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ASSERT ((Address & 3) == 0);
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CpuIo->MemWrite32 (PeiServices, CpuIo, (UINT64) Address, Value);
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return Value;
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}
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/**
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Reads a 64-bit MMIO register.
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Reads the 64-bit MMIO register specified by Address. The 64-bit read value is
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returned. This function must guarantee that all MMIO read and write
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operations are serialized.
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If 64-bit MMIO register operations are not supported, then ASSERT().
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@param Address The MMIO register to read.
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@return The value read from Address.
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**/
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UINT64
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EFIAPI
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MmioRead64 (
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IN UINTN Address
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)
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{
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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 Address is aligned on a 64-bit boundary.
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//
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ASSERT ((Address & 7) == (sizeof (UINT64) - 1));
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return CpuIo->MemRead64 (PeiServices, CpuIo, (UINT64) Address);
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}
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/**
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Writes a 64-bit MMIO register.
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Writes the 64-bit MMIO register specified by Address with the value specified
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by Value and returns Value. This function must guarantee that all MMIO read
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and write operations are serialized.
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If 64-bit MMIO register operations are not supported, then ASSERT().
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@param Address The MMIO register to write.
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@param Value The value to write to the MMIO register.
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@return The Value written back to Mmio register
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**/
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UINT64
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EFIAPI
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MmioWrite64 (
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IN UINTN Address,
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IN UINT64 Value
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)
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{
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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 Address is aligned on a 64-bit boundary.
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//
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ASSERT ((Address & 7) == 0);
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CpuIo->MemWrite64 (PeiServices, CpuIo, (UINT64) Address, Value);
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return Value;
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}
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