arm: Init the debug UART

At present we don't init the debug UART in the generic ARM code, but
instead leave it to individual machines to handle. This is not the
way it is supposed to work.

Add the required init to the crt files. This ensures that the UART
is available as early as possible and that the announcement appears
when it should, if enabled.

Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/arch/arm/lib/crt0.S b/arch/arm/lib/crt0.S
index 956d258..ba31290 100644 (file)
--- a/arch/arm/lib/crt0.S
+++ b/arch/arm/lib/crt0.S
@@ -109,6 +109,10 @@ ENTRY(_main)
        mov     r9, r0
        bl      board_init_f_init_reserve
 
+#if defined(CONFIG_DEBUG_UART) && CONFIG_IS_ENABLED(SERIAL)
+       bl      debug_uart_init
+#endif
+
 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_EARLY_BSS)
        CLEAR_BSS
 #endif

diff --git a/arch/arm/lib/crt0_64.S b/arch/arm/lib/crt0_64.S
index 680e674..611affb 100644 (file)
--- a/arch/arm/lib/crt0_64.S
+++ b/arch/arm/lib/crt0_64.S
@@ -91,6 +91,10 @@ ENTRY(_main)
        mov     x18, x0
        bl      board_init_f_init_reserve
 
+#if defined(CONFIG_DEBUG_UART) && CONFIG_IS_ENABLED(SERIAL)
+       bl      debug_uart_init
+#endif
+
        mov     x0, #0
        bl      board_init_f