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authorKevin Hilman <khilman@mvista.com>2007-04-30 19:37:19 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2007-05-11 17:26:55 +0100
commit7c6337e225364870e9bf02a3ae277d9fdea483f8 (patch)
tree1ba5819dfc424beea0086cd3b855839be29370dd /arch/arm/mach-davinci/io.c
parent7fdc7849d2f9f926cbaec224bbcbacb164b07b23 (diff)
[ARM] 4303/3: base kernel support for TI DaVinci
Add base kernel support for the TI DaVinci platform. This patch only includes interrupts, timers, CPU identification, serial support and basic power and sleep controller init. More drivers to come. Signed-off-by: Kevin Hilman <khilman@mvista.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-davinci/io.c')
-rw-r--r--arch/arm/mach-davinci/io.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/arm/mach-davinci/io.c b/arch/arm/mach-davinci/io.c
new file mode 100644
index 00000000000..87fae6fb6ec
--- /dev/null
+++ b/arch/arm/mach-davinci/io.c
@@ -0,0 +1,51 @@
+/*
+ * DaVinci I/O mapping code
+ *
+ * Copyright (C) 2005-2006 Texas Instruments
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+
+#include <asm/tlb.h>
+#include <asm/io.h>
+#include <asm/memory.h>
+
+#include <asm/mach/map.h>
+
+extern void davinci_check_revision(void);
+
+/*
+ * The machine specific code may provide the extra mapping besides the
+ * default mapping provided here.
+ */
+static struct map_desc davinci_io_desc[] __initdata = {
+ {
+ .virtual = IO_VIRT,
+ .pfn = __phys_to_pfn(IO_PHYS),
+ .length = IO_SIZE,
+ .type = MT_DEVICE
+ },
+};
+
+void __init davinci_map_common_io(void)
+{
+ iotable_init(davinci_io_desc, ARRAY_SIZE(davinci_io_desc));
+
+ /* Normally devicemaps_init() would flush caches and tlb after
+ * mdesc->map_io(), but we must also do it here because of the CPU
+ * revision check below.
+ */
+ local_flush_tlb_all();
+ flush_cache_all();
+
+ /* We want to check CPU revision early for cpu_is_xxxx() macros.
+ * IO space mapping must be initialized before we can do that.
+ */
+ davinci_check_revision();
+}