//\r
// Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics\r
//\r
-int _inp (unsigned short port);\r
+int _inp (unsigned short port);\r
unsigned short _inpw (unsigned short port);\r
unsigned long _inpd (unsigned short port);\r
int _outp (unsigned short port, int databyte );\r
-unsigned short _outpw(unsigned short port, unsigned short dataword );\r
-unsigned long _outpd(unsigned short port, unsigned long dataword );\r
+unsigned short _outpw (unsigned short port, unsigned short dataword );\r
+unsigned long _outpd (unsigned short port, unsigned long dataword );\r
+void _ReadWriteBarrier (void);\r
\r
#pragma intrinsic(_inp)\r
#pragma intrinsic(_inpw)\r
#pragma intrinsic(_outp)\r
#pragma intrinsic(_outpw)\r
#pragma intrinsic(_outpd)\r
+#pragma intrinsic(_ReadWriteBarrier)\r
\r
+//\r
+// _ReadWriteBarrier() forces memory reads and writes to complete at the point\r
+// in the call. This is only a hint to the compiler and does emit code.\r
+// In past versions of the compiler, _ReadWriteBarrier was enforced only\r
+// locally and did not affect functions up the call tree. In Visual C++\r
+// 2005, _ReadWriteBarrier is enforced all the way up the call tree.\r
+//\r
\r
/**\r
Reads an 8-bit I/O port.\r
IN UINTN Port\r
)\r
{\r
- return (UINT8)_inp ((UINT16)Port);\r
+ UINT8 Value;\r
+\r
+ _ReadWriteBarrier ();\r
+ Value = (UINT8)_inp ((UINT16)Port);\r
+ _ReadWriteBarrier ();\r
+ return Value;\r
}\r
\r
/**\r
IN UINT8 Value\r
)\r
{\r
- return (UINT8)_outp ((UINT16)Port, Value);\r
+ _ReadWriteBarrier ();\r
+ (UINT8)_outp ((UINT16)Port, Value);\r
+ _ReadWriteBarrier ();\r
+ return Value;\r
}\r
\r
/**\r
IN UINTN Port\r
)\r
{\r
+ UINT16 Value;\r
+\r
ASSERT ((Port & 1) == 0);\r
- return _inpw((UINT16)Port);\r
+ _ReadWriteBarrier ();\r
+ Value = _inpw ((UINT16)Port);\r
+ _ReadWriteBarrier ();\r
+ return Value;\r
}\r
\r
/**\r
)\r
{\r
ASSERT ((Port & 1) == 0);\r
- return _outpw ((UINT16)Port, Value);\r
+ _ReadWriteBarrier ();\r
+ _outpw ((UINT16)Port, Value);\r
+ _ReadWriteBarrier ();\r
+ return Value;\r
}\r
\r
/**\r
IN UINTN Port\r
)\r
{\r
+ UINT32 Value;\r
+\r
ASSERT ((Port & 3) == 0);\r
- return _inpd((UINT16)Port);\r
+ _ReadWriteBarrier ();\r
+ Value = _inpd ((UINT16)Port);\r
+ _ReadWriteBarrier ();\r
+ return Value;\r
}\r
\r
/**\r
)\r
{\r
ASSERT ((Port & 3) == 0);\r
- return _outpd ((UINT16)Port, Value);\r
+ _ReadWriteBarrier ();\r
+ _outpd ((UINT16)Port, Value);\r
+ _ReadWriteBarrier ();\r
+ return Value;\r
+}\r
+\r
+\r
+/**\r
+ Reads an 8-bit MMIO register.\r
+\r
+ Reads the 8-bit MMIO register specified by Address. The 8-bit read value is\r
+ returned. This function must guarantee that all MMIO read and write\r
+ operations are serialized.\r
+\r
+ If 8-bit MMIO register operations are not supported, then ASSERT().\r
+\r
+ @param Address The MMIO register to read.\r
+\r
+ @return The value read.\r
+\r
+**/\r
+UINT8\r
+EFIAPI\r
+MmioRead8 (\r
+ IN UINTN Address\r
+ )\r
+{\r
+ UINT8 Value;\r
+\r
+ Value = *(volatile UINT8*)Address;\r
+ return Value;\r
+}\r
+\r
+/**\r
+ Writes an 8-bit MMIO register.\r
+\r
+ Writes the 8-bit MMIO register specified by Address with the value specified\r
+ by Value and returns Value. This function must guarantee that all MMIO read\r
+ and write operations are serialized.\r
+\r
+ If 8-bit MMIO register operations are not supported, then ASSERT().\r
+\r
+ @param Address The MMIO register to write.\r
+ @param Value The value to write to the MMIO register.\r
+\r
+**/\r
+UINT8\r
+EFIAPI\r
+MmioWrite8 (\r
+ IN UINTN Address,\r
+ IN UINT8 Value\r
+ )\r
+{\r
+ return *(volatile UINT8*)Address = Value;\r
+}\r
+\r
+/**\r
+ Reads a 16-bit MMIO register.\r
+\r
+ Reads the 16-bit MMIO register specified by Address. The 16-bit read value is\r
+ returned. This function must guarantee that all MMIO read and write\r
+ operations are serialized.\r
+\r
+ If 16-bit MMIO register operations are not supported, then ASSERT().\r
+\r
+ @param Address The MMIO register to read.\r
+\r
+ @return The value read.\r
+\r
+**/\r
+UINT16\r
+EFIAPI\r
+MmioRead16 (\r
+ IN UINTN Address\r
+ )\r
+{\r
+ UINT16 Value;\r
+\r
+ ASSERT ((Address & 1) == 0);\r
+ Value = *(volatile UINT16*)Address;\r
+ return Value;\r
+}\r
+\r
+/**\r
+ Writes a 16-bit MMIO register.\r
+\r
+ Writes the 16-bit MMIO register specified by Address with the value specified\r
+ by Value and returns Value. This function must guarantee that all MMIO read\r
+ and write operations are serialized.\r
+\r
+ If 16-bit MMIO register operations are not supported, then ASSERT().\r
+\r
+ @param Address The MMIO register to write.\r
+ @param Value The value to write to the MMIO register.\r
+\r
+**/\r
+UINT16\r
+EFIAPI\r
+MmioWrite16 (\r
+ IN UINTN Address,\r
+ IN UINT16 Value\r
+ )\r
+{\r
+ ASSERT ((Address & 1) == 0);\r
+ return *(volatile UINT16*)Address = Value;\r
+}\r
+\r
+/**\r
+ Reads a 32-bit MMIO register.\r
+\r
+ Reads the 32-bit MMIO register specified by Address. The 32-bit read value is\r
+ returned. This function must guarantee that all MMIO read and write\r
+ operations are serialized.\r
+\r
+ If 32-bit MMIO register operations are not supported, then ASSERT().\r
+\r
+ @param Address The MMIO register to read.\r
+\r
+ @return The value read.\r
+\r
+**/\r
+UINT32\r
+EFIAPI\r
+MmioRead32 (\r
+ IN UINTN Address\r
+ )\r
+{\r
+ UINT32 Value;\r
+\r
+ ASSERT ((Address & 3) == 0);\r
+ Value = *(volatile UINT32*)Address;\r
+ return Value;\r
+}\r
+\r
+/**\r
+ Writes a 32-bit MMIO register.\r
+\r
+ Writes the 32-bit MMIO register specified by Address with the value specified\r
+ by Value and returns Value. This function must guarantee that all MMIO read\r
+ and write operations are serialized.\r
+\r
+ If 32-bit MMIO register operations are not supported, then ASSERT().\r
+\r
+ @param Address The MMIO register to write.\r
+ @param Value The value to write to the MMIO register.\r
+\r
+**/\r
+UINT32\r
+EFIAPI\r
+MmioWrite32 (\r
+ IN UINTN Address,\r
+ IN UINT32 Value\r
+ )\r
+{\r
+ ASSERT ((Address & 3) == 0);\r
+ return *(volatile UINT32*)Address = Value;\r
+}\r
+\r
+/**\r
+ Reads a 64-bit MMIO register.\r
+\r
+ Reads the 64-bit MMIO register specified by Address. The 64-bit read value is\r
+ returned. This function must guarantee that all MMIO read and write\r
+ operations are serialized.\r
+\r
+ If 64-bit MMIO register operations are not supported, then ASSERT().\r
+\r
+ @param Address The MMIO register to read.\r
+\r
+ @return The value read.\r
+\r
+**/\r
+UINT64\r
+EFIAPI\r
+MmioRead64 (\r
+ IN UINTN Address\r
+ )\r
+{\r
+ UINT64 Value;\r
+\r
+ ASSERT ((Address & 7) == 0);\r
+ Value = *(volatile UINT64*)Address;\r
+ return Value;\r
+}\r
+\r
+/**\r
+ Writes a 64-bit MMIO register.\r
+\r
+ Writes the 64-bit MMIO register specified by Address with the value specified\r
+ by Value and returns Value. This function must guarantee that all MMIO read\r
+ and write operations are serialized.\r
+\r
+ If 64-bit MMIO register operations are not supported, then ASSERT().\r
+\r
+ @param Address The MMIO register to write.\r
+ @param Value The value to write to the MMIO register.\r
+\r
+**/\r
+UINT64\r
+EFIAPI\r
+MmioWrite64 (\r
+ IN UINTN Address,\r
+ IN UINT64 Value\r
+ )\r
+{\r
+ ASSERT ((Address & 7) == 0);\r
+ return *(volatile UINT64*)Address = Value;\r
}\r
\r
#endif\r
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