forked from xt-sys/exectos
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/rtl/ioreg.c
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* DESCRIPTION: I/O registers related routines
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* DEVELOPERS: Rafal Kupiec <belliash@codingworkshop.eu.org>
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*/
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#include <xtos.h>
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/**
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* Reads a byte 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 UCHAR byte read from the 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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RtlReadRegisterByte(IN VOLATILE 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 byte 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 ULONG byte read from the 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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RtlReadRegisterLong(IN VOLATILE 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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* Reads a byte 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 USHORT byte read from the 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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RtlReadRegisterShort(IN VOLATILE 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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* Writes a byte 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 UCHAR 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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RtlWriteRegisterByte(IN VOLATILE 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 byte 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 ULONG 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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RtlWriteRegisterLong(IN VOLATILE 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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/**
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* Writes a byte 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 USHORT 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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RtlWriteRegisterShort(IN VOLATILE 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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