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-rw-r--r--arch/sh/include/asm/fixmap.h8
-rw-r--r--arch/sh/include/asm/io.h6
2 files changed, 14 insertions, 0 deletions
diff --git a/arch/sh/include/asm/fixmap.h b/arch/sh/include/asm/fixmap.h
index 1566d3361ca..38a1de86687 100644
--- a/arch/sh/include/asm/fixmap.h
+++ b/arch/sh/include/asm/fixmap.h
@@ -60,6 +60,14 @@ enum fixed_addresses {
FIX_KMAP_BEGIN, /* reserved pte's for temporary kernel mappings */
FIX_KMAP_END = FIX_KMAP_BEGIN+(KM_TYPE_NR*NR_CPUS)-1,
#endif
+ /*
+ * FIX_IOREMAP entries are useful for mapping physical address
+ * space before ioremap() is useable, e.g. really early in boot
+ * before kmalloc() is working.
+ */
+#define FIX_N_IOREMAPS 32
+ FIX_IOREMAP_BEGIN,
+ FIX_IOREMAP_END = FIX_IOREMAP_BEGIN + FIX_N_IOREMAPS,
__end_of_fixed_addresses
};
diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h
index f4314d8b05b..bee5965e0a8 100644
--- a/arch/sh/include/asm/io.h
+++ b/arch/sh/include/asm/io.h
@@ -237,6 +237,12 @@ void __iomem *__ioremap_caller(unsigned long offset, unsigned long size,
unsigned long flags, void *caller);
void __iounmap(void __iomem *addr);
+#ifdef CONFIG_IOREMAP_FIXED
+extern void __iomem *ioremap_fixed(resource_size_t, unsigned long, pgprot_t);
+extern void iounmap_fixed(void __iomem *);
+extern void ioremap_fixed_init(void);
+#endif
+
static inline void __iomem *
__ioremap(unsigned long offset, unsigned long size, unsigned long flags)
{