x86: Allow a UART to be set up before the FSP is ready
Since the FSP is a black box it helps to have some sort of debugging
available to check its inputs. If the debug UART is in use, set it up
after CAR is available.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/include/asm/u-boot-x86.h b/arch/x86/include/asm/u-boot-x86.h
index b98afa8..5d7dff5 100644
--- a/arch/x86/include/asm/u-boot-x86.h
+++ b/arch/x86/include/asm/u-boot-x86.h
@@ -45,6 +45,9 @@
void dram_init_banksize(void);
int default_print_cpuinfo(void);
+/* Set up a UART which can be used with printch(), printhex8(), etc. */
+int setup_early_uart(void);
+
void setup_pcat_compatibility(void);
void isa_unmap_rom(u32 addr);
diff --git a/arch/x86/lib/fsp/fsp_support.c b/arch/x86/lib/fsp/fsp_support.c
index 8b639f7..5f96da1 100644
--- a/arch/x86/lib/fsp/fsp_support.c
+++ b/arch/x86/lib/fsp/fsp_support.c
@@ -124,6 +124,10 @@
struct fsp_init_params *params_ptr;
struct upd_region *fsp_upd;
+#ifdef CONFIG_DEBUG_UART
+ setup_early_uart();
+#endif
+
fsp_hdr = find_fsp_header();
if (fsp_hdr == NULL) {
/* No valid FSP info header was found */