[U-Boot] [PATCH] cmd_boot: cleanup for 'go' command

[Kuo-Jung Su]

From: Kuo-Jung Su <dantesu at faraday-tech.com>

With MMU/D-Cache enabled, data might be retained at cache
rather than at DRAM when we execute 'go' command, and some
of the bare-metal softwares would always invalidate the entire
data cache at start-up, and causes data lost issue.

This patch is designed to fixed this issue.
It has been verified at ARM based systems, and should also work
at other platforms.

Signed-off-by: Kuo-Jung Su <dantesu at faraday-tech.com>
---
 common/cmd_boot.c |   10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/common/cmd_boot.c b/common/cmd_boot.c
index d3836fd..1a1a532 100644
--- a/common/cmd_boot.c
+++ b/common/cmd_boot.c
@@ -50,6 +50,16 @@ static int do_go(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 
 	printf ("## Starting application at 0x%08lX ...\n", addr);
 
+#ifdef CONFIG_USE_IRQ
+	disable_interrupts();
+#endif
+#ifndef CONFIG_SYS_DCACHE_OFF
+	flush_dcache_all();
+#endif
+#ifndef CONFIG_SYS_ICACHE_OFF
+	invalidate_icache_all();
+#endif
+
 	/*
 	 * pass address parameter as argv[0] (aka command name),
 	 * and all remaining args
-- 
1.7.9.5