5c7dd7acc3
repo: https://github.com/T-head-Semi/linux commit: b1313fe517ca3703119dcc99ef3bbf75ab42bcfb Change-Id: I6cbb35294024ea3a66140e311f4bb705fd7fd626
41 lines
964 B
C
41 lines
964 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(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;
|
|
|
|
uaccess_enable_not_uao();
|
|
rc = __arch_copy_from_user(to, from, n);
|
|
uaccess_disable_not_uao();
|
|
|
|
/* See above */
|
|
__clean_dcache_area_pop(to, n - rc);
|
|
return rc;
|
|
}
|