1 files changed, 78 insertions, 0 deletions

diff --git a/arch/arm/mach-tegra/io.c b/arch/arm/mach-tegra/io.c
new file mode 100644
index 000000000000..9fe2c5c683d4
--- /dev/null
+++ b/arch/arm/mach-tegra/io.c
@@ -0,0 +1,78 @@
+/*
+ * arch/arm/mach-tegra/io.c
+ *
+ * Copyright (C) 2010 Google, Inc.
+ *
+ * Author:
+ *      Colin Cross <ccross@google.com>
+ *      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/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/io.h>
+
+#include <mach/hardware.h>
+#include <asm/page.h>
+#include <asm/mach/map.h>
+
+#include "board.h"
+
+static struct map_desc tegra_io_desc[] __initdata = {
+        {
+                .virtual = IO_PPSB_VIRT,
+                .pfn = __phys_to_pfn(IO_PPSB_PHYS),
+                .length = IO_PPSB_SIZE,
+                .type = MT_DEVICE,
+        },
+        {
+                .virtual = IO_APB_VIRT,
+                .pfn = __phys_to_pfn(IO_APB_PHYS),
+                .length = IO_APB_SIZE,
+                .type = MT_DEVICE,
+        },
+        {
+                .virtual = IO_CPU_VIRT,
+                .pfn = __phys_to_pfn(IO_CPU_PHYS),
+                .length = IO_CPU_SIZE,
+                .type = MT_DEVICE,
+        },
+};
+
+void __init tegra_map_common_io(void)
+{
+        iotable_init(tegra_io_desc, ARRAY_SIZE(tegra_io_desc));
+}
+
+/*
+ * Intercept ioremap() requests for addresses in our fixed mapping regions.
+ */
+void __iomem *tegra_ioremap(unsigned long p, size_t size, unsigned int type)
+{
+        void __iomem *v = IO_ADDRESS(p);
+        if (v == NULL)
+                v = __arm_ioremap(p, size, type);
+        return v;
+}
+EXPORT_SYMBOL(tegra_ioremap);
+
+void tegra_iounmap(volatile void __iomem *addr)
+{
+        unsigned long virt = (unsigned long)addr;
+
+        if (virt >= VMALLOC_START && virt < VMALLOC_END)
+                __iounmap(addr);
+}
+EXPORT_SYMBOL(tegra_iounmap);