Commit 5ddcb3c3 authored by Atsushi Nemoto's avatar Atsushi Nemoto Committed by Ralf Baechle

[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
......@@ -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
......
......@@ -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 ||
......
......@@ -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 */
......@@ -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
*
* 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 */
/*
* 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 */
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