From: Magnus Damm <damm@igel.co.jp>
Date: Thu, 30 Apr 2009 03:56:37 +0000 (+0900)
Subject: sh: pass through ioremap() for non-mmu processors.
X-Git-Tag: firefly_0821_release~13982^2~41^2~116
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e6be3a25861429166f945499c7ee616875bc3db9;p=firefly-linux-kernel-4.4.55.git

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 dcc1af8a2cfe..99e2d47f79f5 100644
--- 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 0454f8d68059..ef217344afcb 100644
--- 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)