diff options
| author | Atsushi Nemoto <anemo@mba.ocn.ne.jp> | 2007-06-25 20:14:01 +0400 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2007-07-10 20:33:03 +0400 |
| commit | 5ddcb3c35be995517a32799796e2acda90a784e0 (patch) | |
| tree | fc0f6130b72aca477a9c52a0d1f9443c1968bc63 /include/asm-mips/mach-tx49xx | |
| parent | bb33b19ff92aed11fb56435be4c5d5231598a948 (diff) | |
| download | linux-5ddcb3c35be995517a32799796e2acda90a784e0.tar.xz | |
[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>
Diffstat (limited to 'include/asm-mips/mach-tx49xx')
| -rw-r--r-- | include/asm-mips/mach-tx49xx/ioremap.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/include/asm-mips/mach-tx49xx/ioremap.h b/include/asm-mips/mach-tx49xx/ioremap.h new file mode 100644 index 000000000000..88cf546719b8 --- /dev/null +++ b/include/asm-mips/mach-tx49xx/ioremap.h @@ -0,0 +1,42 @@ +/* + * include/asm-mips/mach-tx49xx/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_TX49XX_IOREMAP_H +#define __ASM_MACH_TX49XX_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) +{ +#ifdef CONFIG_64BIT +#define TXX9_DIRECTMAP_BASE 0xfff000000ul +#else +#define TXX9_DIRECTMAP_BASE 0xff000000ul +#endif + if (offset >= TXX9_DIRECTMAP_BASE && + offset < TXX9_DIRECTMAP_BASE + 0x400000) + return (void __iomem *)(unsigned long)(int)offset; + return NULL; +} + +static inline int plat_iounmap(const volatile void __iomem *addr) +{ + return (unsigned long)addr >= (unsigned long)(int)TXX9_DIRECTMAP_BASE; +} + +#endif /* __ASM_MACH_TX49XX_IOREMAP_H */ |