nios2: set up the debug UART early

Set up the debug UART early if enabled, so that it is ready to use.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Acked-by: Chin Liang See <clsee@altera.com>

diff --git a/arch/nios2/cpu/start.S b/arch/nios2/cpu/start.S
index 204d0cd9d4a714a56198a7ed80c5ea3c99227ced..3e1b0c9514052f5a502994da9edfb440b2bd5fe5 100644 (file)
--- a/arch/nios2/cpu/start.S
+++ b/arch/nios2/cpu/start.S
@@ -106,6 +106,13 @@ _reloc:
        stw     r0, 4(sp)
        mov     fp, sp
 
+#ifdef CONFIG_DEBUG_UART
+       /* Set up the debug UART */
+       movhi   r2, %hi(debug_uart_init@h)
+       ori     r2, r2, %lo(debug_uart_init@h)
+       callr   r2
+#endif
+
        /* Allocate and initialize reserved area, update SP */
        mov     r4, sp
        movhi   r2, %hi(board_init_f_alloc_reserve@h)