arm: add errata workarounds

Header only implementation, so they can be pulled
into the individual SoC cpu init functions.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 67 insertions, 0 deletions

diff --git a/arch/arm/include/asm/errata.h b/arch/arm/include/asm/errata.h
new file mode 100644
index 0000000000..e2ffd87360
--- /dev/null
+++ b/arch/arm/include/asm/errata.h
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2014 Lucas Stach, Pengutronix
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+static inline void enable_arm_errata_716044_war(void)
+{
+	__asm__ __volatile__ (
+		"mrc	p15, 0, r0, c1, c0, 0\n"
+		"orr	r0, r0, #1 << 11\n"
+		"mcr	p15, 0, r0, c1, c0, 0\n"
+	);
+}
+
+static inline void enable_arm_errata_742230_war(void)
+{
+	__asm__ __volatile__ (
+		"mrc	p15, 0, r0, c15, c0, 1\n"
+		"orr	r0, r0, #1 << 4\n"
+		"mcr	p15, 0, r0, c15, c0, 1\n"
+	);
+}
+
+static inline void enable_arm_errata_743622_war(void)
+{
+	__asm__ __volatile__ (
+		"mrc	p15, 0, r0, c15, c0, 1\n"
+		"orr	r0, r0, #1 << 6\n"
+		"mcr	p15, 0, r0, c15, c0, 1\n"
+	);
+}
+
+static inline void enable_arm_errata_751472_war(void)
+{
+	__asm__ __volatile__ (
+		"mrc	p15, 0, r0, c15, c0, 1\n"
+		"orr	r0, r0, #1 << 11\n"
+		"mcr	p15, 0, r0, c15, c0, 1\n"
+	);
+}
+
+static inline void enable_arm_errata_761320_war(void)
+{
+	__asm__ __volatile__ (
+		"mrc	p15, 0, r0, c15, c0, 1\n"
+		"orr	r0, r0, #1 << 21\n"
+		"mcr	p15, 0, r0, c15, c0, 1\n"
+	);
+}
+
+static inline void enable_arm_errata_794072_war(void)
+{
+	__asm__ __volatile__ (
+		"mrc	p15, 0, r0, c15, c0, 1\n"
+		"orr	r0, r0, #1 << 4\n"
+		"mcr	p15, 0, r0, c15, c0, 1\n"
+	);
+}