-----Original Message----- From: Maniyam, Dinesh dinesh.maniyam@intel.com Sent: Wednesday, 1 June, 2022 3:57 PM To: u-boot@lists.denx.de Cc: Vasut, Marek marex@denx.de; Simon Goldschmidt simon.k.r.goldschmidt@gmail.com; Chee, Tien Fong tien.fong.chee@intel.com; Hea, Kok Kiang kok.kiang.hea@intel.com; Gan, Yau Wai yau.wai.gan@intel.com; Kho, Sin Hui sin.hui.kho@intel.com; Lokanathan, Raaj raaj.lokanathan@intel.com; Maniyam, Dinesh dinesh.maniyam@intel.com Subject: [PATCH] drivers: cache: ncore: Disable snoop filter
From: Dinesh Maniyam dinesh.maniyam@intel.com
There is hardware bug in NCORE CCU IP and it is causing an issue in the coherent directory tracking of outstanding cache lines. The workaround is disabling snoop filter.
Signed-off-by: Dinesh Maniyam dinesh.maniyam@intel.com
drivers/cache/cache-ncore.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/cache/cache-ncore.c b/drivers/cache/cache-ncore.c index 3beff780de..117d2b91ab 100644 --- a/drivers/cache/cache-ncore.c +++ b/drivers/cache/cache-ncore.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 /*
- Copyright (C) 2019 Intel Corporation <www.intel.com>
*/
- Copyright (C) 2019-2022 Intel Corporation <www.intel.com>
#include <dm.h> @@ -81,8 +81,8 @@ static void ncore_ccu_init_dirs(void __iomem *base) hang(); }
/* Enable snoop filter, a bit per snoop filter */setbits_le32((ulong)CCU_DIR_REG_ADDR(base,DIRUSFER, i),
/* Disable snoop filter, a bit per snoop filter */clrbits_le32((ulong)CCU_DIR_REG_ADDR(base,DIRUSFER, i), BIT(f)); } } -- 2.25.1
Reviewed-by: Tien Fong Chee tien.fong.chee@intel.com
Regards Tien Fong