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ARM: rmobile: Ignore U-Boot env when started via JTAG on Porter

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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+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
This commit is contained in:
Marek Vasut 2018-04-17 02:49:48 +02:00 committed by Marek Vasut
parent a3c159b9c3
commit f2b6f82b9d
1 changed files with 16 additions and 0 deletions
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16
board/renesas/porter/porter.c
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@ -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;
}