Commit 5ddcb3c3 authored by Atsushi Nemoto's avatar Atsushi Nemoto Committed by Ralf Baechle
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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: default avatarAtsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent bb33b19f

arch/mips/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -580,6 +580,7 @@ load-$(CONFIG_TOSHIBA_JMR3927) += 0xffffffff80050000 
#

core-$(CONFIG_TOSHIBA_RBTX4927)	+= arch/mips/tx4927/toshiba_rbtx4927/

core-$(CONFIG_TOSHIBA_RBTX4927)	+= arch/mips/tx4927/common/

cflags-$(CONFIG_TOSHIBA_RBTX4927) += -Iinclude/asm-mips/mach-tx49xx

load-$(CONFIG_TOSHIBA_RBTX4927)	+= 0xffffffff80020000



#
@@ -587,6 +588,7 @@ load-$(CONFIG_TOSHIBA_RBTX4927) += 0xffffffff80020000 
#

core-$(CONFIG_TOSHIBA_RBTX4938) += arch/mips/tx4938/toshiba_rbtx4938/

core-$(CONFIG_TOSHIBA_RBTX4938) += arch/mips/tx4938/common/

cflags-$(CONFIG_TOSHIBA_RBTX4938) += -Iinclude/asm-mips/mach-tx49xx

load-$(CONFIG_TOSHIBA_RBTX4938) += 0xffffffff80100000



cflags-y			+= -Iinclude/asm-mips/mach-generic

include/asm-mips/io.h

+8 −0
Original line number Diff line number Diff line
@@ -178,6 +178,11 @@ extern void __iounmap(const volatile void __iomem *addr); 
static inline void __iomem * __ioremap_mode(phys_t offset, unsigned long size,

	unsigned long flags)

{

	void __iomem *addr = plat_ioremap(offset, size, flags);



	if (addr)

		return addr;



#define __IS_LOW512(addr) (!((phys_t)(addr) & (phys_t) ~0x1fffffffULL))



	if (cpu_has_64bit_addresses) {
@@ -282,6 +287,9 @@ static inline void __iomem * __ioremap_mode(phys_t offset, unsigned long size, 


static inline void iounmap(const volatile void __iomem *addr)

{

	if (plat_iounmap(addr))

		return;



#define __IS_KSEG1(addr) (((unsigned long)(addr) & ~0x1fffffffUL) == CKSEG1)



	if (cpu_has_64bit_addresses ||

include/asm-mips/mach-au1x00/ioremap.h

+11 −0
Original line number Diff line number Diff line
@@ -28,4 +28,15 @@ static inline phys_t fixup_bigphys_addr(phys_t phys_addr, phys_t size) 
	return __fixup_bigphys_addr(phys_addr, size);

}



static inline void __iomem *plat_ioremap(phys_t offset, unsigned long size,

	unsigned long flags)

{

	return NULL;

}



static inline int plat_iounmap(const volatile void __iomem *addr)

{

	return 0;

}



#endif /* __ASM_MACH_AU1X00_IOREMAP_H */

include/asm-mips/mach-generic/ioremap.h

+11 −0
Original line number Diff line number Diff line
@@ -20,4 +20,15 @@ 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)

{

	return NULL;

}



static inline int plat_iounmap(const volatile void __iomem *addr)

{

	return 0;

}



#endif /* __ASM_MACH_GENERIC_IOREMAP_H */

include/asm-mips/mach-jmr3927/ioremap.h

0 → 100644
+38 −0
Original line number Diff line number Diff line 
/*

 *	include/asm-mips/mach-jmr3927/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_JMR3927_IOREMAP_H

#define __ASM_MACH_JMR3927_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)

{

#define TXX9_DIRECTMAP_BASE	0xff000000ul

	if (offset >= TXX9_DIRECTMAP_BASE &&

	    offset < TXX9_DIRECTMAP_BASE + 0xf0000)

		return (void __iomem *)offset;

	return NULL;

}



static inline int plat_iounmap(const volatile void __iomem *addr)

{

	return (unsigned long)addr >= TXX9_DIRECTMAP_BASE;

}



#endif /* __ASM_MACH_JMR3927_IOREMAP_H */

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