kernel-ark/include/asm-mips/mach-jmr3927/ioremap.h
Atsushi Nemoto 5ddcb3c35b [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: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-07-10 17:33:03 +01:00

39 lines
1.1 KiB
C

/*
* 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 */