From 2f6839d44c7c93db733ff6862de728e964ea901d Mon Sep 17 00:00:00 2001
From: Antony Pavlov <antonynpavlov@gmail.com>
Date: Tue, 18 Dec 2018 10:19:37 +0300
Subject: RISC-V: add nmon nano-monitor

nmon is a tiny (<1024 bytes) monitor program
for the RV32I processors.

It can operate with NO working RAM at all!

It uses only the processor registers and NS16550-compatible
UART port for operation, so it can be used for a memory
controller setup code debugging.

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 arch/riscv/boot/start.S | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'arch/riscv/boot/start.S')

diff --git a/arch/riscv/boot/start.S b/arch/riscv/boot/start.S
index d13708740b..d1dbe48b7b 100644
--- a/arch/riscv/boot/start.S
+++ b/arch/riscv/boot/start.S
@@ -18,12 +18,20 @@
 
 #include <asm-generic/memory_layout.h>
 
+#include "mach/debug_ll.h"
+
+#include "asm/riscv_nmon.h"
+
 	.text
 	.section ".text_entry"
 	.align 2
 
 .globl _start
 _start:
+	debug_ll_ns16550_init
+
+	riscv_nmon
+
 	li	sp, STACK_BASE + STACK_SIZE
 
 	/* copy barebox to link location */
-- 
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