71 lines
2.1 KiB
C
71 lines
2.1 KiB
C
|
/*
|
||
|
|
* Copyright 2006 PathScale, Inc. All Rights Reserved.
|
||
|
|
*
|
||
|
|
* This file is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of version 2 of the GNU General Public License
|
||
|
|
* 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 St, Fifth Floor, Boston, MA 02110-1301, USA.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/io.h>
|
||
|
|
|
||
|
|
/**
|
||
|
|
* __iowrite32_copy - copy data to MMIO space, in 32-bit units
|
||
|
|
* @to: destination, in MMIO space (must be 32-bit aligned)
|
||
|
|
* @from: source (must be 32-bit aligned)
|
||
|
|
* @count: number of 32-bit quantities to copy
|
||
|
|
*
|
||
|
|
* Copy data from kernel space to MMIO space, in units of 32 bits at a
|
||
|
|
* time. Order of access is not guaranteed, nor is a memory barrier
|
||
|
|
* performed afterwards.
|
||
|
|
*/
|
||
|
|
void __attribute__((weak)) __iowrite32_copy(void __iomem *to,
|
||
|
|
const void *from,
|
||
|
|
size_t count)
|
||
|
|
{
|
||
|
|
u32 __iomem *dst = to;
|
||
|
|
const u32 *src = from;
|
||
|
|
const u32 *end = src + count;
|
||
|
|
|
||
|
|
while (src < end)
|
||
|
|
__raw_writel(*src++, dst++);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(__iowrite32_copy);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* __iowrite64_copy - copy data to MMIO space, in 64-bit or 32-bit units
|
||
|
|
* @to: destination, in MMIO space (must be 64-bit aligned)
|
||
|
|
* @from: source (must be 64-bit aligned)
|
||
|
|
* @count: number of 64-bit quantities to copy
|
||
|
|
*
|
||
|
|
* Copy data from kernel space to MMIO space, in units of 32 or 64 bits at a
|
||
|
|
* time. Order of access is not guaranteed, nor is a memory barrier
|
||
|
|
* performed afterwards.
|
||
|
|
*/
|
||
|
|
void __attribute__((weak)) __iowrite64_copy(void __iomem *to,
|
||
|
|
const void *from,
|
||
|
|
size_t count)
|
||
|
|
{
|
||
|
|
#ifdef CONFIG_64BIT
|
||
|
|
u64 __iomem *dst = to;
|
||
|
|
const u64 *src = from;
|
||
|
|
const u64 *end = src + count;
|
||
|
|
|
||
|
|
while (src < end)
|
||
|
|
__raw_writeq(*src++, dst++);
|
||
|
|
#else
|
||
|
|
__iowrite32_copy(to, from, count * 2);
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
EXPORT_SYMBOL_GPL(__iowrite64_copy);
|