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| author | Chao Li <lichao@loongson.cn> | 2023-10-16 11:43:40 +0800 |
|---|---|---|
| committer | Liming Gao <gaoliming@byosoft.com.cn> | 2024-02-06 23:51:47 +0800 |
| commit | 0565a8e885e48ca4bea95f47dad04d3d9968b447 (patch) | |
| tree | a704c92f8debf0bc6fb7bfe81239e0ef05ac3312 /MdePkg/Include/Library | |
| parent | 414ad233a51192662ed66ceee7a23007c6710ec9 (diff) | |
| download | edk2-0565a8e885e48ca4bea95f47dad04d3d9968b447.tar.gz edk2-0565a8e885e48ca4bea95f47dad04d3d9968b447.tar.bz2 edk2-0565a8e885e48ca4bea95f47dad04d3d9968b447.zip | |
MdePkg: Add CSR operation for LoongArch
Add CsrRead, CsrWrite and CsrXChg functions for LoongArch, and use them
to operate the CSR register of LoongArch architecture.
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4584
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Signed-off-by: Chao Li <lichao@loongson.cn>
Co-authored-by: Bibo Mao <maobibo@loongson.cn>
Acked-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>
Diffstat (limited to 'MdePkg/Include/Library')
| -rw-r--r-- | MdePkg/Include/Library/BaseLib.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/MdePkg/Include/Library/BaseLib.h b/MdePkg/Include/Library/BaseLib.h index 29009adbc9..4e97368ae2 100644 --- a/MdePkg/Include/Library/BaseLib.h +++ b/MdePkg/Include/Library/BaseLib.h @@ -351,6 +351,51 @@ AsmReadStableCounter ( VOID
);
+/**
+ CSR read operation.
+
+ @param[in] Select CSR read instruction select values.
+
+ @return The return value of csrrd instruction, return -1 means no CSR instruction
+ is found.
+**/
+UINTN
+CsrRead (
+ IN UINT16 Select
+ );
+
+/**
+ CSR write operation.
+
+ @param[in] Select CSR write instruction select values.
+ @param[in] Value The csrwr will write the value.
+
+ @return The return value of csrwr instruction, that is, store the old value of
+ the register, return -1 means no CSR instruction is found.
+**/
+UINTN
+CsrWrite (
+ IN UINT16 Select,
+ IN UINTN Value
+ );
+
+/**
+ CSR exchange operation.
+
+ @param[in] Select CSR exchange instruction select values.
+ @param[in] 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, return -1 means no CSR instruction is found.
+**/
+UINTN
+CsrXChg (
+ IN UINT16 Select,
+ IN UINTN Value,
+ IN UINTN Mask
+ );
+
#endif // defined (MDE_CPU_LOONGARCH64)
//
|