x86: Support debug UART in 64-bit mode

The debug UART is already set up in SPL, so there is no need to do
anything here. We must provide the (empty) function though.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

diff --git a/arch/x86/cpu/x86_64/cpu.c b/arch/x86/cpu/x86_64/cpu.c
index 6a387612916c1e6f268555cd9234ec260bc91787..d1c3873dd6a7836763562c4ee93d378fad46b741 100644 (file)
--- a/arch/x86/cpu/x86_64/cpu.c
+++ b/arch/x86/cpu/x86_64/cpu.c
@@ -50,3 +50,10 @@ int x86_cpu_init_f(void)
 {
        return 0;
 }
+
+#ifdef CONFIG_DEBUG_UART_BOARD_INIT
+void board_debug_uart_init(void)
+{
+       /* this was already done in SPL */
+}
+#endif