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/*
* I/O string operations
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
* Copyright (C) 2006 IBM Corporation
*
* Largely rewritten by Cort Dougan (cort@cs.nmt.edu)
* and Paul Mackerras.
*
* Adapted for iSeries by Mike Corrigan (mikejc@us.ibm.com)
* PPC64 updates by Dave Engebretsen (engebret@us.ibm.com)
*
* Rewritten in C by Stephen Rothwell.
*
* 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.
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/compiler.h>
#include <linux/module.h>
#include <asm/io.h>
#include <asm/firmware.h>
#include <asm/bug.h>
void _insb(const volatile u8 __iomem *port, void *buf, long count)
{
u8 *tbuf = buf;
u8 tmp;
if (unlikely(count <= 0))
return;
asm volatile("sync");
do {
tmp = *port;
asm volatile("eieio");
*tbuf++ = tmp;
} while (--count != 0);
asm volatile("twi 0,%0,0; isync" : : "r" (tmp));
}
EXPORT_SYMBOL(_insb);
void _outsb(volatile u8 __iomem *port, const void *buf, long count)
{
const u8 *tbuf = buf;
if (unlikely(count <= 0))
return;
asm volatile("sync");
do {
*port = *tbuf++;
} while (--count != 0);
asm volatile("sync");
}
EXPORT_SYMBOL(_outsb);
void _insw_ns(const volatile u16 __iomem *port, void *buf, long count)
{
u16 *tbuf = buf;
u16 tmp;
if (unlikely(count <= 0))
return;
asm volatile("sync");
do {
tmp = *port;
asm volatile("eieio");
*tbuf++ = tmp;
} while (--count != 0);
asm volatile("twi 0,%0,0; isync" : : "r" (tmp));
}
EXPORT_SYMBOL(_insw_ns);
void _outsw_ns(volatile u16 __iomem *port, const void *buf, long count)
{
const u16 *tbuf = buf;
if (unlikely(count <= 0))
return;
asm volatile("sync");
do {
*port = *tbuf++;
} while (--count != 0);
asm volatile("sync");
}
EXPORT_SYMBOL(_outsw_ns);
void _insl_ns(const volatile u32 __iomem *port, void *buf, long count)
{
u32 *tbuf = buf;
u32 tmp;
if (unlikely(count <= 0))
return;
asm volatile("sync");
do {
tmp = *port;
asm volatile("eieio");
*tbuf++ = tmp;
} while (--count != 0);
asm volatile("twi 0,%0,0; isync" : : "r" (tmp));
}
EXPORT_SYMBOL(_insl_ns);
void _outsl_ns(volatile u32 __iomem *port, const void *buf, long count)
{
const u32 *tbuf = buf;
if (unlikely(count <= 0))
return;
asm volatile("sync");
do {
*port = *tbuf++;
} while (--count != 0);
asm volatile("sync");
}
EXPORT_SYMBOL(_outsl_ns);
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