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authorRalf Baechle <ralf@linux-mips.org>2008-09-16 19:48:51 +0200
committerRalf Baechle <ralf@linux-mips.org>2008-10-11 16:18:52 +0100
commit384740dc49ea651ba350704d13ff6be9976e37fe (patch)
treea6e80cad287ccae7a86d81bfa692fc96889c88ed /arch/mips/include/asm/mach-generic/mangle-port.h
parente8c7c482347574ecdd45c43e32c332d5fc2ece61 (diff)
MIPS: Move headfiles to new location below arch/mips/include
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include/asm/mach-generic/mangle-port.h')
-rw-r--r--arch/mips/include/asm/mach-generic/mangle-port.h52
1 files changed, 52 insertions, 0 deletions
diff --git a/arch/mips/include/asm/mach-generic/mangle-port.h b/arch/mips/include/asm/mach-generic/mangle-port.h
new file mode 100644
index 00000000000..f49dc990214
--- /dev/null
+++ b/arch/mips/include/asm/mach-generic/mangle-port.h
@@ -0,0 +1,52 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2003, 2004 Ralf Baechle
+ */
+#ifndef __ASM_MACH_GENERIC_MANGLE_PORT_H
+#define __ASM_MACH_GENERIC_MANGLE_PORT_H
+
+#define __swizzle_addr_b(port) (port)
+#define __swizzle_addr_w(port) (port)
+#define __swizzle_addr_l(port) (port)
+#define __swizzle_addr_q(port) (port)
+
+/*
+ * Sane hardware offers swapping of PCI/ISA I/O space accesses in hardware;
+ * less sane hardware forces software to fiddle with this...
+ *
+ * Regardless, if the host bus endianness mismatches that of PCI/ISA, then
+ * you can't have the numerical value of data and byte addresses within
+ * multibyte quantities both preserved at the same time. Hence two
+ * variations of functions: non-prefixed ones that preserve the value
+ * and prefixed ones that preserve byte addresses. The latters are
+ * typically used for moving raw data between a peripheral and memory (cf.
+ * string I/O functions), hence the "__mem_" prefix.
+ */
+#if defined(CONFIG_SWAP_IO_SPACE)
+
+# define ioswabb(a, x) (x)
+# define __mem_ioswabb(a, x) (x)
+# define ioswabw(a, x) le16_to_cpu(x)
+# define __mem_ioswabw(a, x) (x)
+# define ioswabl(a, x) le32_to_cpu(x)
+# define __mem_ioswabl(a, x) (x)
+# define ioswabq(a, x) le64_to_cpu(x)
+# define __mem_ioswabq(a, x) (x)
+
+#else
+
+# define ioswabb(a, x) (x)
+# define __mem_ioswabb(a, x) (x)
+# define ioswabw(a, x) (x)
+# define __mem_ioswabw(a, x) cpu_to_le16(x)
+# define ioswabl(a, x) (x)
+# define __mem_ioswabl(a, x) cpu_to_le32(x)
+# define ioswabq(a, x) (x)
+# define __mem_ioswabq(a, x) cpu_to_le32(x)
+
+#endif
+
+#endif /* __ASM_MACH_GENERIC_MANGLE_PORT_H */