125 lines
2.7 KiB
C++
125 lines
2.7 KiB
C++
/**
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* PROJECT: ExectOS
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* COPYRIGHT: See COPYING.md in the top level directory
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* FILE: xtoskrnl/hl/ioreg.cc
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* DESCRIPTION: Basic I/O registers access functionality
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* DEVELOPERS: Rafal Kupiec <belliash@codingworkshop.eu.org>
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*/
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#include <xtos.hh>
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/**
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* Reads an 8-bit data from a specified register address.
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*
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* @param Register
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* Supplies a pointer to register address holding data to read.
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*
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* @return This routine returns a value at the specified register.
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*
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* @since XT 1.0
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*/
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XTAPI
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UCHAR
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HL::IoRegister::ReadRegister8(IN PVOID Register)
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{
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return *((VOLATILE PUCHAR)Register);
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}
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/**
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* Reads a 16-bit data from a specified register address.
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*
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* @param Register
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* Supplies a pointer to register address holding data to read.
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*
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* @return This routine returns a value at the specified register.
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*
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* @since XT 1.0
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*/
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XTAPI
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USHORT
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HL::IoRegister::ReadRegister16(IN PVOID Register)
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{
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return *((VOLATILE PUSHORT)Register);
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}
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/**
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* Reads a 32-bit data from a specified register address.
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*
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* @param Register
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* Supplies a pointer to register address holding data to read.
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*
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* @return This routine returns a value at the specified register.
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*
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* @since XT 1.0
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*/
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XTAPI
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ULONG
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HL::IoRegister::ReadRegister32(IN PVOID Register)
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{
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return *((VOLATILE PULONG)Register);
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}
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/**
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* Writes an 8-bit value into a specified register address.
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*
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* @param Register
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* Supplies a pointer to register address where data will be written.
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*
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* @param Value
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* Supplies a new value that will be stored into a register.
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*
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* @return This routine does not return any value.
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*
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* @since XT 1.0
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*/
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XTAPI
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VOID
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HL::IoRegister::WriteRegister8(IN PVOID Register,
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IN UCHAR Value)
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{
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*((VOLATILE PUCHAR)Register) = Value;
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}
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/**
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* Writes a 16-bit value into a specified register address.
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*
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* @param Register
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* Supplies a pointer to register address where data will be written.
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*
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* @param Value
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* Supplies a new value that will be stored into a register.
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*
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* @return This routine does not return any value.
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*
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* @since XT 1.0
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*/
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XTAPI
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VOID
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HL::IoRegister::WriteRegister16(IN PVOID Register,
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IN USHORT Value)
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{
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*((VOLATILE PUSHORT)Register) = Value;
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}
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/**
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* Writes a 32-bit value into a specified register address.
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*
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* @param Register
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* Supplies a pointer to register address where data will be written.
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*
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* @param Value
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* Supplies a new value that will be stored into a register.
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*
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* @return This routine does not return any value.
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*
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* @since XT 1.0
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*/
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XTAPI
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VOID
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HL::IoRegister::WriteRegister32(IN PVOID Register,
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IN ULONG Value)
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{
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*((VOLATILE PULONG)Register) = Value;
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}
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