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/** @file
LoongArch CSR operation functions.
Copyright (c) 2024, Loongson Technology Corporation Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
UINTN
AsmCsrRead (
IN UINT16 Select
);
UINTN
AsmCsrWrite (
IN UINT16 Select,
IN UINTN Value
);
UINTN
AsmCsrXChg (
IN UINT16 Select,
IN UINTN Value,
IN UINTN Mask
);
/**
CSR read operation.
@param[in] Select CSR read instruction select values.
@return The return value of csrrd instruction,
if a break exception is triggered, the Select is out of support.
**/
UINTN
EFIAPI
CsrRead (
IN UINT16 Select
)
{
return AsmCsrRead (Select);
}
/**
CSR write operation.
@param[in] Select CSR write instruction select values.
@param[in, out] Value The csrwr will write the value.
@return The return value of csrwr instruction, that is, store the old value of
the register, if a break exception is triggered, the Select is out of support.
**/
UINTN
EFIAPI
CsrWrite (
IN UINT16 Select,
IN OUT UINTN Value
)
{
return AsmCsrWrite (Select, Value);
}
/**
CSR exchange operation.
@param[in] Select CSR exchange instruction select values.
@param[in, out] Value The csrxchg will write the value.
@param[in] Mask The csrxchg mask value.
@return The return value of csrxchg instruction, that is, store the old value of
the register, if a break exception is triggered, the Select is out of support.
**/
UINTN
EFIAPI
CsrXChg (
IN UINT16 Select,
IN OUT UINTN Value,
IN UINTN Mask
)
{
return AsmCsrXChg (Select, Value, Mask);
}
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