sh: pass through ioremap() for non-mmu processors.

All 32-bit SuperH processors currently go through __ioremap_mode()
and check for IO_TRAPPED and directly mapped segments. With this
patch we simplify the MMU less case with a pass through version of
 __ioremap_mode() which just returns the physical address.

The effects of this is change are:
 - fix non-MMU ioremap() of high address hardware blocks (sh7203 CMT)
 - make sure IO_TRAPPED is not selected

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

diff --git a/arch/sh/boards/Kconfig b/arch/sh/boards/Kconfig
index dcc1af8..99e2d47 100644 (file)
--- a/arch/sh/boards/Kconfig
+++ b/arch/sh/boards/Kconfig
@@ -121,7 +121,7 @@ config SH_RTS7751R2D
        bool "RTS7751R2D"
        depends on CPU_SUBTYPE_SH7751R
        select SYS_SUPPORTS_PCI
-       select IO_TRAPPED
+       select IO_TRAPPED if MMU
        help
          Select RTS7751R2D if configuring for a Renesas Technology
          Sales SH-Graphics board.
@@ -145,13 +145,13 @@ config SH_HIGHLANDER
        bool "Highlander"
        depends on CPU_SUBTYPE_SH7780 || CPU_SUBTYPE_SH7785
        select SYS_SUPPORTS_PCI
-       select IO_TRAPPED
+       select IO_TRAPPED if MMU
 
 config SH_SH7785LCR
        bool "SH7785LCR"
        depends on CPU_SUBTYPE_SH7785
        select SYS_SUPPORTS_PCI
-       select IO_TRAPPED
+       select IO_TRAPPED if MMU
 
 config SH_SH7785LCR_29BIT_PHYSMAPS
        bool "SH7785LCR 29bit physmaps"

diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h
index 0454f8d..ef21734 100644 (file)
--- a/arch/sh/include/asm/io.h
+++ b/arch/sh/include/asm/io.h
@@ -228,12 +228,6 @@ void __iounmap(void __iomem *addr);
 unsigned long onchip_remap(unsigned long addr, unsigned long size,
                           const char *name);
 extern void onchip_unmap(unsigned long vaddr);
-#else
-#define __ioremap(offset, size, flags) ((void __iomem *)(offset))
-#define __iounmap(addr)                        do { } while (0)
-#define onchip_remap(addr, size, name) (addr)
-#define onchip_unmap(addr)             do { } while (0)
-#endif /* CONFIG_MMU */
 
 static inline void __iomem *
 __ioremap_mode(unsigned long offset, unsigned long size, unsigned long flags)
@@ -268,6 +262,12 @@ __ioremap_mode(unsigned long offset, unsigned long size, unsigned long flags)
 
        return __ioremap(offset, size, flags);
 }
+#else
+#define onchip_remap(addr, size, name)         (addr)
+#define onchip_unmap(addr)                     do { } while (0)
+#define __ioremap_mode(offset, size, flags)    ((void __iomem *)(offset))
+#define __iounmap(addr)                                do { } while (0)
+#endif /* CONFIG_MMU */
 
 #define ioremap(offset, size)                          \
        __ioremap_mode((offset), (size), 0)