118 lines
2.4 KiB
C
118 lines
2.4 KiB
C
|
/*
|
||
|
|
* 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>
|
||
|
|
|
||
|
|
void _insb(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(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(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);
|