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[PATCH] ppc64: Big-endian I/O memory accessors. 

I/O memory accessors. Big-endian version. For those busses/devices
that do export big-endian I/O memory.

Of notable relevance/reference:

   http://lwn.net/Articles/132804/
   http://ozlabs.org/pipermail/linuxppc-embedded/2005-August/019798.html
   http://ozlabs.org/pipermail/linuxppc-embedded/2005-August/019752.html

Signed-Off-By: Arthur Othieno <a.othieno@bluewin.ch>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Arthur Othieno 2005-08-20 21:48:47 -04:00 committed by Paul Mackerras
parent 1635317fac
commit 766375362a
1 changed files with 20 additions and 0 deletions
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20
arch/ppc64/kernel/iomap.c
View File

@ -22,13 +22,23 @@ unsigned int fastcall ioread16(void __iomem *addr)
{
return readw(addr);
}
unsigned int fastcall ioread16be(void __iomem *addr)
{
return in_be16(addr);
}
unsigned int fastcall ioread32(void __iomem *addr)
{
return readl(addr);
}
unsigned int fastcall ioread32be(void __iomem *addr)
{
return in_be32(addr);
}
EXPORT_SYMBOL(ioread8);
EXPORT_SYMBOL(ioread16);
EXPORT_SYMBOL(ioread16be);
EXPORT_SYMBOL(ioread32);
EXPORT_SYMBOL(ioread32be);
void fastcall iowrite8(u8 val, void __iomem *addr)
{
@ -38,13 +48,23 @@ void fastcall iowrite16(u16 val, void __iomem *addr)
{
writew(val, addr);
}
void fastcall iowrite16be(u16 val, void __iomem *addr)
{
out_be16(addr, val);
}
void fastcall iowrite32(u32 val, void __iomem *addr)
{
writel(val, addr);
}
void fastcall iowrite32be(u32 val, void __iomem *addr)
{
out_be32(addr, val);
}
EXPORT_SYMBOL(iowrite8);
EXPORT_SYMBOL(iowrite16);
EXPORT_SYMBOL(iowrite16be);
EXPORT_SYMBOL(iowrite32);
EXPORT_SYMBOL(iowrite32be);
/*
* These are the "repeat read/write" functions. Note the