From: Graf Yang <graf.yang@analog.com>
Date: Fri, 8 May 2009 07:42:12 +0000 (+0000)
Subject: Blackfin: add workaround for anomaly 05000287
X-Git-Tag: v2.6.31-rc1~361^2~29
X-Git-Url: http://ftp.safe.ca/?p=safe%2Fjmp%2Flinux-2.6;a=commitdiff_plain;h=8af7ffa0d5460586e0f06b2f045a6a2631224b61

Blackfin: add workaround for anomaly 05000287

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---

diff --git a/arch/blackfin/kernel/cplb-nompu/cacheinit.c b/arch/blackfin/kernel/cplb-nompu/cacheinit.c
index c6ff947..d5a86c3 100644
--- a/arch/blackfin/kernel/cplb-nompu/cacheinit.c
+++ b/arch/blackfin/kernel/cplb-nompu/cacheinit.c
@@ -55,7 +55,14 @@ void __cpuinit bfin_dcache_init(struct cplb_entry *dcplb_tbl)
 	}
 
 	ctrl = bfin_read_DMEM_CONTROL();
-	ctrl |= DMEM_CNTR;
+
+	/*
+	 *  Anomaly notes:
+	 *  05000287 - We implement workaround #2 - Change the DMEM_CONTROL
+	 *  register, so that the port preferences for DAG0 and DAG1 are set
+	 *  to port B
+	 */
+	ctrl |= DMEM_CNTR | PORT_PREF0 | (ANOMALY_05000287 ? PORT_PREF1 : 0);
 	bfin_write_DMEM_CONTROL(ctrl);
 	SSYNC();
 }