io.c
2.17 KB
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/*
* I/O access functions for Hexagon
*
* Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
#include <asm/io.h>
/* These are all FIFO routines! */
/*
* __raw_readsw - read words a short at a time
* @addr: source address
* @data: data address
* @len: number of shorts to read
*/
void __raw_readsw(const void __iomem *addr, void *data, int len)
{
const volatile short int *src = (short int *) addr;
short int *dst = (short int *) data;
if ((u32)data & 0x1)
panic("unaligned pointer to readsw");
while (len-- > 0)
*dst++ = *src;
}
/*
* __raw_writesw - read words a short at a time
* @addr: source address
* @data: data address
* @len: number of shorts to read
*/
void __raw_writesw(void __iomem *addr, const void *data, int len)
{
const short int *src = (short int *)data;
volatile short int *dst = (short int *)addr;
if ((u32)data & 0x1)
panic("unaligned pointer to writesw");
while (len-- > 0)
*dst = *src++;
}
/* Pretty sure len is pre-adjusted for the length of the access already */
void __raw_readsl(const void __iomem *addr, void *data, int len)
{
const volatile long *src = (long *) addr;
long *dst = (long *) data;
if ((u32)data & 0x3)
panic("unaligned pointer to readsl");
while (len-- > 0)
*dst++ = *src;
}
void __raw_writesl(void __iomem *addr, const void *data, int len)
{
const long *src = (long *)data;
volatile long *dst = (long *)addr;
if ((u32)data & 0x3)
panic("unaligned pointer to writesl");
while (len-- > 0)
*dst = *src++;
}