From 4658ebf8efdda2f85a3c12cab2c5eff99fcdb2c1 Mon Sep 17 00:00:00 2001
From: yingche <zxcv2569763104@gmail.com>
Date: Thu, 26 Mar 2026 15:25:37 +0800
Subject: [PATCH] Add rv32emu board support

Add board configuration for rv32emu, a RISC-V RV32 instruction set
simulator. This follows the existing board support pattern under
examples/riscv32/.
---
 examples/riscv32/rv32emu/boardsupport.c | 24 ++++++++++++++++++++++++
 examples/riscv32/rv32emu/boardsupport.h |  1 +
 2 files changed, 25 insertions(+)
 create mode 100644 examples/riscv32/rv32emu/boardsupport.c
 create mode 100644 examples/riscv32/rv32emu/boardsupport.h

diff --git a/examples/riscv32/rv32emu/boardsupport.c b/examples/riscv32/rv32emu/boardsupport.c
new file mode 100644
index 00000000..c8498c43
--- /dev/null
+++ b/examples/riscv32/rv32emu/boardsupport.c
@@ -0,0 +1,24 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+
+#include <support.h>
+
+void
+initialise_board(void)
+{
+}
+
+void __attribute__((noinline)) __attribute__((externally_visible))
+start_trigger(void)
+{
+#if defined(__riscv)
+    __asm__ volatile("li a0, 0" : : : "memory");
+#endif
+}
+
+void __attribute__((noinline)) __attribute__((externally_visible))
+stop_trigger(void)
+{
+#if defined(__riscv)
+    __asm__ volatile("li a0, 0" : : : "memory");
+#endif
+}
diff --git a/examples/riscv32/rv32emu/boardsupport.h b/examples/riscv32/rv32emu/boardsupport.h
new file mode 100644
index 00000000..9def3a33
--- /dev/null
+++ b/examples/riscv32/rv32emu/boardsupport.h
@@ -0,0 +1 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */