[MIPS] Make I/O helpers more customizable

    
1. Move ioswab*() and __mem_ioswab*() to mangle-port.h.  This gets rid
   of CONFIG_SGI_IP22 from include/asm-mips/io.h.
    
2. Pass a virtual address to *ioswab*().  Then we can provide
   mach-specific *ioswab*() and can do every evil thing based on its
   argument.  It could be useful on machines which have regions with
   different endian conversion scheme.
    
3. Call __swizzle_addr*() _after_ adding mips_io_port_base.  This
   unifies the meaning of the argument of __swizzle_addr*() (always
   virtual address).  Then mach-specific __swizzle_addr*() can do every
   evil thing based on the argument.
    
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/include/asm-mips/mach-ip27/mangle-port.h b/include/asm-mips/mach-ip27/mangle-port.h
index f76c44880451..d615312a451a 100644
--- a/include/asm-mips/mach-ip27/mangle-port.h
+++ b/include/asm-mips/mach-ip27/mangle-port.h
@@ -13,4 +13,13 @@
 #define __swizzle_addr_l(port)  (port)
 #define __swizzle_addr_q(port)  (port)
 
+# 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 /* __ASM_MACH_IP27_MANGLE_PORT_H */