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powerpc/powernv: Add PIO accessors for Power8 LPC bus

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This uses the hooks provided by CONFIG_PPC_INDIRECT_PIO to
implement a set of hooks for IO port access to use the LPC
bus via OPAL calls for the first 64K of IO space

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt 2013-07-15 13:03:11 +10:00
parent b37193b718
commit 3fafe9c202
8 changed files with 226 additions and 1 deletions
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3
arch/powerpc/kernel/io.c
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@ -25,6 +25,9 @@
#include <asm/firmware.h>
#include <asm/bug.h>
/* See definition in io.h */
bool isa_io_special;
void _insb(const volatile u8 __iomem *port, void *buf, long count)
{
u8 *tbuf = buf;