From efc3f9526f9cfcd8614668c03b9c66b209782c41 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org>
Date: Mon, 5 Sep 2022 11:31:21 +0200
Subject: [PATCH] boot: Call flush() before booting
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In a lot of cases kernel resets UART HW. To ensure that U-Boot messages
printed before booting the kernel are not lost, call new U-Boot console
flush() function.
Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
---
boot/bootm_os.c | 1 +
cmd/boot.c | 1 +
cmd/elf.c | 2 ++
3 files changed, 4 insertions(+)
diff --git a/boot/bootm_os.c b/boot/bootm_os.c
index f31820cd07..079224ce58 100644
--- a/boot/bootm_os.c
+++ b/boot/bootm_os.c
@@ -303,6 +303,7 @@ static void do_bootvx_fdt(bootm_headers_t *images)
#else
printf("## Starting vxWorks at 0x%08lx\n", (ulong)images->ep);
#endif
+ flush();
boot_jump_vxworks(images);
diff --git a/cmd/boot.c b/cmd/boot.c
index be67a5980d..14839c1ced 100644
--- a/cmd/boot.c
+++ b/cmd/boot.c
@@ -32,6 +32,7 @@ static int do_go(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
addr = hextoul(argv[1], NULL);
printf ("## Starting application at 0x%08lX ...\n", addr);
+ flush();
/*
* pass address parameter as argv[0] (aka command name),
diff --git a/cmd/elf.c b/cmd/elf.c
index ce40d3f72a..b7b9f506a5 100644
--- a/cmd/elf.c
+++ b/cmd/elf.c
@@ -72,6 +72,7 @@ int do_bootelf(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
return rcode;
printf("## Starting application at 0x%08lx ...\n", addr);
+ flush();
/*
* pass address parameter as argv[0] (aka command name),
@@ -274,6 +275,7 @@ int do_bootvx(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
puts("## Not an ELF image, assuming binary\n");
printf("## Starting vxWorks at 0x%08lx ...\n", addr);
+ flush();
dcache_disable();
#if defined(CONFIG_ARM64) && defined(CONFIG_ARMV8_PSCI)
--
2.39.5