Added some comments for registing LoongArch exceptions.
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4584
Cc: Michael D Kinney <michael.d.kin...@intel.com>
Cc: Liming Gao <gaolim...@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang....@intel.com>
Signed-off-by: Chao Li <lic...@loongson.cn>
Reviewed-by: Liming Gao <gaolim...@byosoft.com.cn>
---
MdePkg/Include/Protocol/DebugSupport.h | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/MdePkg/Include/Protocol/DebugSupport.h
b/MdePkg/Include/Protocol/DebugSupport.h
index 9742663619..06f99ba7f7 100644
--- a/MdePkg/Include/Protocol/DebugSupport.h
+++ b/MdePkg/Include/Protocol/DebugSupport.h
@@ -683,6 +683,20 @@ typedef struct {
//
// LoongArch processor exception types.
//
+// The exception types is located in the CSR ESTAT
+// register offset 16 bits, width 6 bits.
+//
+// If you want to register an exception hook, you can
+// shfit the number left by 16 bits, and the exception
+// handler will know the types.
+//
+// For example:
+// mCpu->CpuRegisterInterruptHandler (
+// mCpu,
+// (EXCEPT_LOONGARCH_PPI << CSR_ESTAT_EXC_SHIFT),
+// PpiExceptionHandler
+// );
+//
#define EXCEPT_LOONGARCH_INT 0
#define EXCEPT_LOONGARCH_PIL 1
#define EXCEPT_LOONGARCH_PIS 2
--
2.27.0
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