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authorAtsushi Nemoto <anemo@mba.ocn.ne.jp>2007-06-26 01:14:01 +0900
committerRalf Baechle <ralf@linux-mips.org>2007-07-10 17:33:03 +0100
commit5ddcb3c35be995517a32799796e2acda90a784e0 (patch)
treefc0f6130b72aca477a9c52a0d1f9443c1968bc63 /include/asm-mips/mach-tx49xx
parentbb33b19ff92aed11fb56435be4c5d5231598a948 (diff)
downloadblackbird-op-linux-5ddcb3c35be995517a32799796e2acda90a784e0.tar.gz
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[MIPS] Make ioremap() work on TX39/49 special unmapped segment
TX39XX and TX49XX have "reserved" segment in CKSEG3 area. 0xff000000-0xff3fffff on TX49XX and 0xff000000-0xfffeffff on TX39XX are reserved (unmapped, uncached). Controllers on these SoCs are placed in this segment. This patch add plat_ioremap() and plat_iounmap() to override default behavior and implement these hooks for TX39/TX49. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include/asm-mips/mach-tx49xx')
-rw-r--r--include/asm-mips/mach-tx49xx/ioremap.h42
1 files changed, 42 insertions, 0 deletions
diff --git a/include/asm-mips/mach-tx49xx/ioremap.h b/include/asm-mips/mach-tx49xx/ioremap.h
new file mode 100644
index 000000000000..88cf546719b8
--- /dev/null
+++ b/include/asm-mips/mach-tx49xx/ioremap.h
@@ -0,0 +1,42 @@
+/*
+ * include/asm-mips/mach-tx49xx/ioremap.h
+ *
+ * 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.
+ */
+#ifndef __ASM_MACH_TX49XX_IOREMAP_H
+#define __ASM_MACH_TX49XX_IOREMAP_H
+
+#include <linux/types.h>
+
+/*
+ * Allow physical addresses to be fixed up to help peripherals located
+ * outside the low 32-bit range -- generic pass-through version.
+ */
+static inline phys_t fixup_bigphys_addr(phys_t phys_addr, phys_t size)
+{
+ return phys_addr;
+}
+
+static inline void __iomem *plat_ioremap(phys_t offset, unsigned long size,
+ unsigned long flags)
+{
+#ifdef CONFIG_64BIT
+#define TXX9_DIRECTMAP_BASE 0xfff000000ul
+#else
+#define TXX9_DIRECTMAP_BASE 0xff000000ul
+#endif
+ if (offset >= TXX9_DIRECTMAP_BASE &&
+ offset < TXX9_DIRECTMAP_BASE + 0x400000)
+ return (void __iomem *)(unsigned long)(int)offset;
+ return NULL;
+}
+
+static inline int plat_iounmap(const volatile void __iomem *addr)
+{
+ return (unsigned long)addr >= (unsigned long)(int)TXX9_DIRECTMAP_BASE;
+}
+
+#endif /* __ASM_MACH_TX49XX_IOREMAP_H */
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