fix(intel): missing NCORE CCU snoop filter fix in BL2

Clear Ncore CCU snoop filter. There is hardware bug in NCORE CCU IP
and it is causing an issue in the coherent directory tracking of
outstanding cache lines.

Signed-off-by: Jit Loon Lim <jit.loon.lim@intel.com>
Change-Id: I9ee67c94e6379d318516ae8f660a62323ce8d563

diff --git a/plat/intel/soc/common/drivers/ccu/ncore_ccu.c b/plat/intel/soc/common/drivers/ccu/ncore_ccu.c
index d9a238ed2a5ec62c04ea1f3bc04ed62377592f42..99d48d2f7a4da977eb0415e29dc35778535498bc 100644 (file)
--- a/plat/intel/soc/common/drivers/ccu/ncore_ccu.c
+++ b/plat/intel/soc/common/drivers/ccu/ncore_ccu.c
@@ -40,7 +40,7 @@ uint32_t directory_init(void)
                        dir_sf_en = DIRECTORY_UNIT(dir, NCORE_DIRUSFER);
 
                        /* Initialize All Entries */
-                       mmio_write_32(dir_sf_mtn, SNOOP_FILTER_ID(dir));
+                       mmio_write_32(dir_sf_mtn, SNOOP_FILTER_ID(sf));
 
                        /* Poll Active Bit */
                        ret = poll_active_bit(dir);
@@ -49,8 +49,9 @@ uint32_t directory_init(void)
                                return -ETIMEDOUT;
                        }
 
-                       /* Snoope Filter Enable */
-                       mmio_setbits_32(dir_sf_en, BIT(sf));
+                       /* Disable snoop filter, a bit per snoop filter */
+                       mmio_clrbits_32(dir_sf_en, BIT(sf));
+
                }
        }