When U-Boot is started via JTAG, ignore the installed environment
as it may interfere with the recovery of the board.
Signed-off-by: Marek Vasut <marek.vasut+rene...@gmail.com>
Cc: Nobuhiro Iwamatsu <iwama...@nigauri.org>
---
board/renesas/porter/porter.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/board/renesas/porter/porter.c b/board/renesas/porter/porter.c
index acd4f91d59..eb66bc903e 100644
--- a/board/renesas/porter/porter.c
+++ b/board/renesas/porter/porter.c
@@ -11,6 +11,7 @@
#include <malloc.h>
#include <dm.h>
#include <dm/platform_data/serial_sh.h>
+#include <environment.h>
#include <asm/processor.h>
#include <asm/mach-types.h>
#include <asm/io.h>
@@ -136,3 +137,18 @@ void reset_cpu(ulong addr)
if (ret)
hang();
}
+
+enum env_location env_get_location(enum env_operation op, int prio)
+{
+ const u32 load_magic = 0xb33fc0de;
+
+ /* Block environment access if loaded using JTAG */
+ if ((readl(CONFIG_SPL_TEXT_BASE + 0x24) == load_magic) &&
+ (op != ENVOP_INIT))
+ return ENVL_UNKNOWN;
+
+ if (prio)
+ return ENVL_UNKNOWN;
+
+ return ENVL_SPI_FLASH;
+}
--
2.16.2
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