1 files changed, 79 insertions, 0 deletions

diff --git a/arch/arm/mach-tegra/include/mach/io.h b/arch/arm/mach-tegra/include/mach/io.h
new file mode 100644
index 000000000000..35edfc32ffc9
--- /dev/null
+++ b/arch/arm/mach-tegra/include/mach/io.h
@@ -0,0 +1,79 @@
+/*
+ * arch/arm/mach-tegra/include/mach/io.h
+ *
+ * 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.
+ *
+ */
+
+#ifndef __MACH_TEGRA_IO_H
+#define __MACH_TEGRA_IO_H
+
+#define IO_SPACE_LIMIT 0xffffffff
+
+/* On TEGRA, many peripherals are very closely packed in
+ * two 256MB io windows (that actually only use about 64KB
+ * at the start of each).
+ *
+ * We will just map the first 1MB of each window (to minimize
+ * pt entries needed) and provide a macro to transform physical
+ * io addresses to an appropriate void __iomem *.
+ *
+ */
+
+#define IO_CPU_PHYS     0x50040000
+#define IO_CPU_VIRT     0xFE000000
+#define IO_CPU_SIZE     SZ_16K
+
+#define IO_PPSB_PHYS    0x60000000
+#define IO_PPSB_VIRT    0xFE200000
+#define IO_PPSB_SIZE    SZ_1M
+
+#define IO_APB_PHYS     0x70000000
+#define IO_APB_VIRT     0xFE300000
+#define IO_APB_SIZE     SZ_1M
+
+#define IO_TO_VIRT_BETWEEN(p, st, sz)   ((p) >= (st) && (p) < ((st) + (sz)))
+#define IO_TO_VIRT_XLATE(p, pst, vst)   (((p) - (pst) + (vst)))
+
+#define IO_TO_VIRT(n) ( \
+        IO_TO_VIRT_BETWEEN((n), IO_PPSB_PHYS, IO_PPSB_SIZE) ?           \
+                IO_TO_VIRT_XLATE((n), IO_PPSB_PHYS, IO_PPSB_VIRT) :     \
+        IO_TO_VIRT_BETWEEN((n), IO_APB_PHYS, IO_APB_SIZE) ?             \
+                IO_TO_VIRT_XLATE((n), IO_APB_PHYS, IO_APB_VIRT) :       \
+        IO_TO_VIRT_BETWEEN((n), IO_CPU_PHYS, IO_CPU_SIZE) ?             \
+                IO_TO_VIRT_XLATE((n), IO_CPU_PHYS, IO_CPU_VIRT) :       \
+        0)
+
+#ifndef __ASSEMBLER__
+
+#define __arch_ioremap(p, s, t) tegra_ioremap(p, s, t)
+#define __arch_iounmap(v)       tegra_iounmap(v)
+
+void __iomem *tegra_ioremap(unsigned long phys, size_t size, unsigned int type);
+void tegra_iounmap(volatile void __iomem *addr);
+
+#define IO_ADDRESS(n) ((void __iomem *) IO_TO_VIRT(n))
+
+static inline void __iomem *__io(unsigned long addr)
+{
+        return (void __iomem *)addr;
+}
+#define __io(a)         __io(a)
+#define __mem_pci(a)    (a)
+
+#endif
+
+#endif