41 lines
964 B
C
41 lines
964 B
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2017 ARM Ltd.
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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;
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uaccess_enable_not_uao();
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rc = __arch_copy_from_user(to, from, n);
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uaccess_disable_not_uao();
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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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