/** @file I/O Library basic function implementation and worker functions. Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR> This program and the accompanying materials are licensed and made available under the terms and conditions of the BSD License which accompanies this distribution. The full text of the license may be found at http://opensource.org/licenses/bsd-license.php. THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. **/ #include "DxeIoLibEsalInternal.h" /** Reads registers in the EFI CPU I/O space. Reads the I/O port specified by Port with registers width specified by Width. The read value is returned. If such operations are not supported, then ASSERT(). This function must guarantee that all I/O read and write operations are serialized. @param Port The base address of the I/O operation. The caller is responsible for aligning the Address if required. @param Width The width of the I/O operation. @return Data read from registers in the EFI CPU I/O space. **/ UINT64 EFIAPI IoReadWorker ( IN UINTN Port, IN EFI_CPU_IO_PROTOCOL_WIDTH Width ) { SAL_RETURN_REGS ReturnReg; UINT64 Data; Data = 0; ReturnReg = EsalCall ( EFI_EXTENDED_SAL_BASE_IO_SERVICES_PROTOCOL_GUID_LO, EFI_EXTENDED_SAL_BASE_IO_SERVICES_PROTOCOL_GUID_HI, IoReadFunctionId, (UINT64)Width, Port, 1, (UINT64)&Data, 0, 0, 0 ); ASSERT (ReturnReg.Status == EFI_SAL_SUCCESS); return Data; } /** Writes registers in the EFI CPU I/O space. Writes the I/O port specified by Port with registers width and value specified by Width and Data respectively. Data is returned. If such operations are not supported, then ASSERT(). This function must guarantee that all I/O read and write operations are serialized. @param Port The base address of the I/O operation. The caller is responsible for aligning the Address if required. @param Width The width of the I/O operation. @param Data The value to write to the I/O port. @return The parameter of Data. **/ UINT64 EFIAPI IoWriteWorker ( IN UINTN Port, IN EFI_CPU_IO_PROTOCOL_WIDTH Width, IN UINT64 Data ) { SAL_RETURN_REGS ReturnReg; ReturnReg = EsalCall ( EFI_EXTENDED_SAL_BASE_IO_SERVICES_PROTOCOL_GUID_LO, EFI_EXTENDED_SAL_BASE_IO_SERVICES_PROTOCOL_GUID_HI, IoWriteFunctionId, (UINT64)Width, Port, 1, (UINT64)&Data, 0, 0, 0 ); ASSERT (ReturnReg.Status == EFI_SAL_SUCCESS); return Data; } /** Reads memory-mapped registers in the EFI system memory space. Reads the MMIO registers specified by Address with registers width specified by Width. The read value is returned. If such operations are not supported, then ASSERT(). This function must guarantee that all MMIO read and write operations are serialized. @param Address The MMIO register to read. The caller is responsible for aligning the Address if required. @param Width The width of the I/O operation. @return Data read from registers in the EFI system memory space. **/ UINT64 EFIAPI MmioReadWorker ( IN UINTN Address, IN EFI_CPU_IO_PROTOCOL_WIDTH Width ) { SAL_RETURN_REGS ReturnReg; UINT64 Data; Data = 0; ReturnReg = EsalCall ( EFI_EXTENDED_SAL_BASE_IO_SERVICES_PROTOCOL_GUID_LO, EFI_EXTENDED_SAL_BASE_IO_SERVICES_PROTOCOL_GUID_HI, MemReadFunctionId, (UINT64)Width, Address, 1, (UINT64)&Data, 0, 0, 0 ); ASSERT (ReturnReg.Status == EFI_SAL_SUCCESS); return Data; } /** Writes memory-mapped registers in the EFI system memory space. Writes the MMIO registers specified by Address with registers width and value specified by Width and Data respectively. Data is returned. If such operations are not supported, then ASSERT(). This function must guarantee that all MMIO read and write operations are serialized. @param Address The MMIO register to read. The caller is responsible for aligning the Address if required. @param Width The width of the I/O operation. @param Data The value to write to memory-mapped registers @return Data read from registers in the EFI system memory space. **/ UINT64 EFIAPI MmioWriteWorker ( IN UINTN Address, IN EFI_CPU_IO_PROTOCOL_WIDTH Width, IN UINT64 Data ) { SAL_RETURN_REGS ReturnReg; ReturnReg = EsalCall ( EFI_EXTENDED_SAL_BASE_IO_SERVICES_PROTOCOL_GUID_LO, EFI_EXTENDED_SAL_BASE_IO_SERVICES_PROTOCOL_GUID_HI, MemWriteFunctionId, (UINT64)Width, Address, 1, (UINT64)&Data, 0, 0, 0 ); ASSERT (ReturnReg.Status == EFI_SAL_SUCCESS); return Data; } /** 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 IoRead8 ( IN UINTN Port ) { return (UINT8)IoReadWorker (Port, EfiCpuIoWidthUint8); } /** 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 IoWrite8 ( IN UINTN Port, IN UINT8 Value ) { return (UINT8)IoWriteWorker (Port, EfiCpuIoWidthUint8, 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 IoRead16 ( IN UINTN Port ) { // // Make sure Port is aligned on a 16-bit boundary. // ASSERT ((Port & 1) == 0); return (UINT16)IoReadWorker (Port, EfiCpuIoWidthUint16); } /** 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 IoWrite16 ( IN UINTN Port, IN UINT16 Value ) { // // Make sure Port is aligned on a 16-bit boundary. // ASSERT ((Port & 1) == 0); return (UINT16)IoWriteWorker (Port, EfiCpuIoWidthUint16, 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 IoRead32 ( IN UINTN Port ) { // // Make sure Port is aligned on a 32-bit boundary. // ASSERT ((Port & 3) == 0); return (UINT32)IoReadWorker (Port, EfiCpuIoWidthUint32); } /** 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 IoWrite32 ( IN UINTN Port, IN UINT32 Value ) { // // Make sure Port is aligned on a 32-bit boundary. // ASSERT ((Port & 3) == 0); return (UINT32)IoWriteWorker (Port, EfiCpuIoWidthUint32, Value); } /** Reads a 64-bit I/O port. Reads the 64-bit I/O port specified by Port. The 64-bit read value is returned. This function must guarantee that all I/O read and write operations are serialized. If 64-bit I/O port operations are not supported, then ASSERT(). @param Port The I/O port to read. @return The value read. **/ UINT64 EFIAPI IoRead64 ( IN UINTN Port ) { // // Make sure Port is aligned on a 64-bit boundary. // ASSERT ((Port & 7) == 0); return IoReadWorker (Port, EfiCpuIoWidthUint64); } /** Writes a 64-bit I/O port. Writes the 64-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 64-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. **/ UINT64 EFIAPI IoWrite64 ( IN UINTN Port, IN UINT64 Value ) { // // Make sure Port is aligned on a 64-bit boundary. // ASSERT ((Port & 7) == 0); return IoWriteWorker (Port, EfiCpuIoWidthUint64, 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 ) { return (UINT8)MmioReadWorker (Address, EfiCpuIoWidthUint8); } /** 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 (UINT8)MmioWriteWorker (Address, EfiCpuIoWidthUint8, 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 ) { // // Make sure Address is aligned on a 16-bit boundary. // ASSERT ((Address & 1) == 0); return (UINT16)MmioReadWorker (Address, EfiCpuIoWidthUint16); } /** 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 ) { // // Make sure Address is aligned on a 16-bit boundary. // ASSERT ((Address & 1) == 0); return (UINT16)MmioWriteWorker (Address, EfiCpuIoWidthUint16, 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 ) { // // Make sure Address is aligned on a 32-bit boundary. // ASSERT ((Address & 3) == 0); return (UINT32)MmioReadWorker (Address, EfiCpuIoWidthUint32); } /** 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 ) { // // Make sure Address is aligned on a 32-bit boundary. // ASSERT ((Address & 3) == 0); return (UINT32)MmioWriteWorker (Address, EfiCpuIoWidthUint32, 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 ) { // // Make sure Address is aligned on a 64-bit boundary. // ASSERT ((Address & 7) == 0); return (UINT64)MmioReadWorker (Address, EfiCpuIoWidthUint64); } /** 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 ) { // // Make sure Address is aligned on a 64-bit boundary. // ASSERT ((Address & 7) == 0); return (UINT64)MmioWriteWorker (Address, EfiCpuIoWidthUint64, Value); }