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Commit 76637536 authored by Arthur Othieno's avatar Arthur Othieno Committed by Paul Mackerras
Browse files

[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: default avatarArthur Othieno <a.othieno@bluewin.ch>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 1635317f

arch/ppc64/kernel/iomap.c

+20 −0
Original line number Diff line number Diff line
@@ -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