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Diffstat (limited to 'EDK/Foundation/Library/EdkIIGlueLib/Library/BaseIoLibIntrinsic/IoLibMsc.c')
| -rw-r--r-- | EDK/Foundation/Library/EdkIIGlueLib/Library/BaseIoLibIntrinsic/IoLibMsc.c | 436 |
1 files changed, 436 insertions, 0 deletions
diff --git a/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseIoLibIntrinsic/IoLibMsc.c b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseIoLibIntrinsic/IoLibMsc.c new file mode 100644 index 0000000..ea3eafb --- /dev/null +++ b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseIoLibIntrinsic/IoLibMsc.c @@ -0,0 +1,436 @@ +/*++ + +Copyright (c) 2004 - 2006, Intel Corporation +All rights reserved. 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. + + +Module Name: + + IoLibMsc.c + +Abstract: + + I/O Library. This file has compiler specifics for Microsft C as there is no + ANSI C standard for doing IO. + + MSC - uses intrinsic functions and the optimize will remove the function call + overhead. + + We don't advocate putting compiler specifics in libraries or drivers but there + is no other way to make this work. + +--*/ + +#include "EdkIIGlueBase.h" + +#if _MSC_EXTENSIONS + +// +// Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics +// +int _inp (unsigned short port); +unsigned short _inpw (unsigned short port); +unsigned long _inpd (unsigned short port); +int _outp (unsigned short port, int databyte ); +unsigned short _outpw (unsigned short port, unsigned short dataword ); +unsigned long _outpd (unsigned short port, unsigned long dataword ); +void _ReadWriteBarrier (void); + +#pragma intrinsic(_inp) +#pragma intrinsic(_inpw) +#pragma intrinsic(_inpd) +#pragma intrinsic(_outp) +#pragma intrinsic(_outpw) +#pragma intrinsic(_outpd) +#pragma intrinsic(_ReadWriteBarrier) + +// +// _ReadWriteBarrier() forces memory reads and writes to complete at the point +// in the call. This is only a hint to the compiler and does emit code. +// In past versions of the compiler, _ReadWriteBarrier was enforced only +// locally and did not affect functions up the call tree. In Visual C++ +// 2005, _ReadWriteBarrier is enforced all the way up the call tree. +// + +/** + Reads an 8-bit I/O port. + + Reads the 8-bit I/O port specified by Port. The 8-bit read value is returned. + This function must guarantee that all I/O read and write operations are + serialized. + + If 8-bit I/O port operations are not supported, then ASSERT(). + + @param Port The I/O port to read. + + @return The value read. + +**/ +UINT8 +EFIAPI +GlueIoRead8 ( + IN UINTN Port + ) +{ + UINT8 Value; + + _ReadWriteBarrier (); + Value = (UINT8)_inp ((UINT16)Port); + _ReadWriteBarrier (); + return Value; +} + +/** + Writes an 8-bit I/O port. + + Writes the 8-bit I/O port specified by Port with the value specified by Value + and returns Value. This function must guarantee that all I/O read and write + operations are serialized. + + If 8-bit I/O port operations are not supported, then ASSERT(). + + @param Port The I/O port to write. + @param Value The value to write to the I/O port. + + @return The value written the I/O port. + +**/ +UINT8 +EFIAPI +GlueIoWrite8 ( + IN UINTN Port, + IN UINT8 Value + ) +{ + _ReadWriteBarrier (); + (UINT8)_outp ((UINT16)Port, Value); + _ReadWriteBarrier (); + return Value; +} + +/** + Reads a 16-bit I/O port. + + Reads the 16-bit I/O port specified by Port. The 16-bit read value is returned. + This function must guarantee that all I/O read and write operations are + serialized. + + If 16-bit I/O port operations are not supported, then ASSERT(). + + @param Port The I/O port to read. + + @return The value read. + +**/ +UINT16 +EFIAPI +GlueIoRead16 ( + IN UINTN Port + ) +{ + UINT16 Value; + + ASSERT ((Port & 1) == 0); + _ReadWriteBarrier (); + Value = _inpw ((UINT16)Port); + _ReadWriteBarrier (); + return Value; +} + +/** + Writes a 16-bit I/O port. + + Writes the 16-bit I/O port specified by Port with the value specified by Value + and returns Value. This function must guarantee that all I/O read and write + operations are serialized. + + If 16-bit I/O port operations are not supported, then ASSERT(). + + @param Port The I/O port to write. + @param Value The value to write to the I/O port. + + @return The value written the I/O port. + +**/ +UINT16 +EFIAPI +GlueIoWrite16 ( + IN UINTN Port, + IN UINT16 Value + ) +{ + ASSERT ((Port & 1) == 0); + _ReadWriteBarrier (); + _outpw ((UINT16)Port, Value); + _ReadWriteBarrier (); + return Value; +} + +/** + Reads a 32-bit I/O port. + + Reads the 32-bit I/O port specified by Port. The 32-bit read value is returned. + This function must guarantee that all I/O read and write operations are + serialized. + + If 32-bit I/O port operations are not supported, then ASSERT(). + + @param Port The I/O port to read. + + @return The value read. + +**/ +UINT32 +EFIAPI +GlueIoRead32 ( + IN UINTN Port + ) +{ + UINT32 Value; + + ASSERT ((Port & 3) == 0); + _ReadWriteBarrier (); + Value = _inpd ((UINT16)Port); + _ReadWriteBarrier (); + return Value; +} + +/** + Writes a 32-bit I/O port. + + Writes the 32-bit I/O port specified by Port with the value specified by Value + and returns Value. This function must guarantee that all I/O read and write + operations are serialized. + + If 32-bit I/O port operations are not supported, then ASSERT(). + + @param Port The I/O port to write. + @param Value The value to write to the I/O port. + + @return The value written the I/O port. + +**/ +UINT32 +EFIAPI +GlueIoWrite32 ( + IN UINTN Port, + IN UINT32 Value + ) +{ + ASSERT ((Port & 3) == 0); + _ReadWriteBarrier (); + _outpd ((UINT16)Port, Value); + _ReadWriteBarrier (); + return Value; +} + + +/** + Reads an 8-bit MMIO register. + + Reads the 8-bit MMIO register specified by Address. The 8-bit read value is + 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 + ) +{ + UINT8 Value; + + Value = *(volatile UINT8*)Address; + return Value; +} + +/** + 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. + +**/ +UINT8 +EFIAPI +MmioWrite8 ( + IN UINTN Address, + IN UINT8 Value + ) +{ + return *(volatile UINT8*)Address = 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(). + + @param Address The MMIO register to read. + + @return The value read. + +**/ +UINT16 +EFIAPI +MmioRead16 ( + IN UINTN Address + ) +{ + UINT16 Value; + + ASSERT ((Address & 1) == 0); + Value = *(volatile UINT16*)Address; + return Value; +} + +/** + 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(). + + @param Address The MMIO register to write. + @param Value The value to write to the MMIO register. + +**/ +UINT16 +EFIAPI +MmioWrite16 ( + IN UINTN Address, + IN UINT16 Value + ) +{ + ASSERT ((Address & 1) == 0); + return *(volatile UINT16*)Address = 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(). + + @param Address The MMIO register to read. + + @return The value read. + +**/ +UINT32 +EFIAPI +MmioRead32 ( + IN UINTN Address + ) +{ + UINT32 Value; + + ASSERT ((Address & 3) == 0); + Value = *(volatile UINT32*)Address; + return Value; +} + +/** + 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(). + + @param Address The MMIO register to write. + @param Value The value to write to the MMIO register. + +**/ +UINT32 +EFIAPI +MmioWrite32 ( + IN UINTN Address, + IN UINT32 Value + ) +{ + ASSERT ((Address & 3) == 0); + return *(volatile UINT32*)Address = 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(). + + @param Address The MMIO register to read. + + @return The value read. + +**/ +UINT64 +EFIAPI +MmioRead64 ( + IN UINTN Address + ) +{ + UINT64 Value; + + ASSERT ((Address & 7) == 0); + Value = *(volatile UINT64*)Address; + return Value; +} + +/** + 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(). + + @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 + ) +{ + ASSERT ((Address & 7) == 0); + return *(volatile UINT64*)Address = Value; +} + +#endif |