mirror of
https://github.com/rd-stuffs/msm-4.14.git
synced 2025-02-20 11:45:48 +08:00
5932fd03de
f749448edb9c98bece0aeec5536260a8794af24b Change-Id: I2478a4f19c81f22a751467a073c5ccbac86ab664 Signed-off-by: Richard Raya <rdxzv.dev@gmail.com>
39 lines
977 B
C
39 lines
977 B
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (C) 2017 ARM Ltd.
|
|
*/
|
|
|
|
#include <linux/uaccess.h>
|
|
#include <asm/barrier.h>
|
|
#include <asm/cacheflush.h>
|
|
|
|
void memcpy_flushcache(void *dst, const void *src, size_t cnt)
|
|
{
|
|
/*
|
|
* We assume this should not be called with @dst pointing to
|
|
* non-cacheable memory, such that we don't need an explicit
|
|
* barrier to order the cache maintenance against the memcpy.
|
|
*/
|
|
memcpy(dst, src, cnt);
|
|
__clean_dcache_area_pop((unsigned long)dst, (unsigned long)dst + cnt);
|
|
}
|
|
EXPORT_SYMBOL_GPL(memcpy_flushcache);
|
|
|
|
void memcpy_page_flushcache(char *to, struct page *page, size_t offset,
|
|
size_t len)
|
|
{
|
|
memcpy_flushcache(to, page_address(page) + offset, len);
|
|
}
|
|
|
|
unsigned long __copy_user_flushcache(void *to, const void __user *from,
|
|
unsigned long n)
|
|
{
|
|
unsigned long rc;
|
|
|
|
rc = raw_copy_from_user(to, from, n);
|
|
|
|
/* See above */
|
|
__clean_dcache_area_pop((unsigned long)to, (unsigned long)to + n - rc);
|
|
return rc;
|
|
}
|