1 files changed, 73 insertions, 0 deletions

diff --git a/arch/arm/mach-tegra/mc.c b/arch/arm/mach-tegra/mc.c
new file mode 100644
index 00000000000..0dff50461a3
--- /dev/null
+++ b/arch/arm/mach-tegra/mc.c
@@ -0,0 +1,73 @@
+/*
+ * arch/arm/mach-tegra/mc.c
+ *
+ * Copyright (C) 2010 Google, Inc.
+ * Copyright (C) 2011 NVIDIA Corporation
+ *
+ * Author:
+ *      Erik Gilling <konkers@google.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ *
+ */
+
+#include <linux/io.h>
+#include <linux/spinlock.h>
+
+#include <mach/iomap.h>
+#include <mach/mc.h>
+
+#if defined(CONFIG_ARCH_TEGRA_2x_SOC)
+static DEFINE_SPINLOCK(tegra_mc_lock);
+
+void tegra_mc_set_priority(unsigned long client, unsigned long prio)
+{
+        unsigned long mc_base = IO_TO_VIRT(TEGRA_MC_BASE);
+        unsigned long reg = client >> 8;
+        int field = client & 0xff;
+        unsigned long val;
+        unsigned long flags;
+
+        spin_lock_irqsave(&tegra_mc_lock, flags);
+        val = readl(mc_base + reg);
+        val &= ~(TEGRA_MC_PRIO_MASK << field);
+        val |= prio << field;
+        writel(val, mc_base + reg);
+        spin_unlock_irqrestore(&tegra_mc_lock, flags);
+
+}
+
+int tegra_mc_get_tiled_memory_bandwidth_multiplier(void)
+{
+        return 1;
+}
+
+#else
+        /* !!!FIXME!!! IMPLEMENT tegra_mc_set_priority() */
+
+#include "tegra3_emc.h"
+
+/*
+ * If using T30/DDR3, the 2nd 16 bytes part of DDR3 atom is 2nd line and is
+ * discarded in tiling mode.
+ */
+int tegra_mc_get_tiled_memory_bandwidth_multiplier(void)
+{
+        int type;
+
+        type = tegra_emc_get_dram_type();
+        WARN_ONCE(type == -1, "unknown type DRAM because DVFS is disabled\n");
+
+        if (type == DRAM_TYPE_DDR3)
+                return 2;
+        else
+                return 1;
+}
+#endif