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| author | Antony Pavlov <antonynpavlov@gmail.com> | 2018-12-18 10:19:37 +0300 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2019-01-07 08:53:18 +0100 |
| commit | 2f6839d44c7c93db733ff6862de728e964ea901d (patch) | |
| tree | c1e3298fd7c451f39e49db21d69a12ce80737633 /arch/riscv/boot/start.S | |
| parent | aca96c01fa90dc859d3a3aed01d00a136603723a (diff) | |
| download | barebox-2f6839d44c7c93db733ff6862de728e964ea901d.tar.gz barebox-2f6839d44c7c93db733ff6862de728e964ea901d.tar.xz | |
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>
Diffstat (limited to 'arch/riscv/boot/start.S')
| -rw-r--r-- | arch/riscv/boot/start.S | 8 |
1 files changed, 8 insertions, 0 deletions
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 */ |