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authorAtsushi Nemoto <anemo@mba.ocn.ne.jp>2007-06-25 20:14:01 +0400
committerRalf Baechle <ralf@linux-mips.org>2007-07-10 20:33:03 +0400
commit5ddcb3c35be995517a32799796e2acda90a784e0 (patch)
treefc0f6130b72aca477a9c52a0d1f9443c1968bc63 /include
parentbb33b19ff92aed11fb56435be4c5d5231598a948 (diff)
downloadlinux-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')
-rw-r--r--include/asm-mips/io.h8
-rw-r--r--include/asm-mips/mach-au1x00/ioremap.h11
-rw-r--r--include/asm-mips/mach-generic/ioremap.h11
-rw-r--r--include/asm-mips/mach-jmr3927/ioremap.h38
-rw-r--r--include/asm-mips/mach-tx49xx/ioremap.h42
5 files changed, 110 insertions, 0 deletions
diff --git a/include/asm-mips/io.h b/include/asm-mips/io.h
index 92ec2618560c..12bcc1f9fba9 100644
--- a/include/asm-mips/io.h
+++ b/include/asm-mips/io.h
@@ -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 ||
diff --git a/include/asm-mips/mach-au1x00/ioremap.h b/include/asm-mips/mach-au1x00/ioremap.h
index 098fca4289bb..364cea2dc71f 100644
--- a/include/asm-mips/mach-au1x00/ioremap.h
+++ b/include/asm-mips/mach-au1x00/ioremap.h
@@ -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 */
diff --git a/include/asm-mips/mach-generic/ioremap.h b/include/asm-mips/mach-generic/ioremap.h
index 9b64ff6e485d..b379938d47f0 100644
--- a/include/asm-mips/mach-generic/ioremap.h
+++ b/include/asm-mips/mach-generic/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 */
diff --git a/include/asm-mips/mach-jmr3927/ioremap.h b/include/asm-mips/mach-jmr3927/ioremap.h
new file mode 100644
index 000000000000..aa131ad7f717
--- /dev/null
+++ b/include/asm-mips/mach-jmr3927/ioremap.h
@@ -0,0 +1,38 @@
+/*
+ * 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 */
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 */