From bf3475d369e4d240f80555d727f3694c5df7e1cb Mon Sep 17 00:00:00 2001
From: Lee Lup Yuen <luppy@appkaki.com>
Date: Fri, 28 Jul 2023 18:40:05 +0800
Subject: [PATCH] Debug Exception

---
 arch/risc-v/src/common/riscv_exception_common.S | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/risc-v/src/common/riscv_exception_common.S b/arch/risc-v/src/common/riscv_exception_common.S
index 1f1180d46b307..b29c7121cb20c 100644
--- a/arch/risc-v/src/common/riscv_exception_common.S
+++ b/arch/risc-v/src/common/riscv_exception_common.S
@@ -75,6 +75,14 @@
   .align  8
 
 exception_common:
+  /* Begin Debug */
+  /* Load UART Base Address to Register t0 */
+  li  t0, 0x10000000
+  /* Load `#` to Register t1 */
+  li  t1, 0x23
+  /* Store byte from Register t1 to UART Base Address, Offset 0 */
+  sb  t1, 0(t0)
+  /* End Debug */
 
 #ifdef CONFIG_ARCH_KERNEL_STACK
   /* Take the kernel stack into use */