mirror of https://gitee.com/openkylin/linux.git
48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
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/*
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* Copyright (C) 2017 ARM Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/uaccess.h>
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#include <asm/barrier.h>
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#include <asm/cacheflush.h>
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void memcpy_flushcache(void *dst, const void *src, size_t cnt)
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{
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/*
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* We assume this should not be called with @dst pointing to
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* non-cacheable memory, such that we don't need an explicit
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* barrier to order the cache maintenance against the memcpy.
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*/
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memcpy(dst, src, cnt);
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__clean_dcache_area_pop(dst, cnt);
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}
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EXPORT_SYMBOL_GPL(memcpy_flushcache);
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void memcpy_page_flushcache(char *to, struct page *page, size_t offset,
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size_t len)
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{
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memcpy_flushcache(to, page_address(page) + offset, len);
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}
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unsigned long __copy_user_flushcache(void *to, const void __user *from,
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unsigned long n)
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{
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unsigned long rc = __arch_copy_from_user(to, from, n);
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/* See above */
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__clean_dcache_area_pop(to, n - rc);
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return rc;
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}
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