// 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);
        dcache_clean_pop((unsigned long)dst, (unsigned long)dst + cnt);
}
EXPORT_SYMBOL_GPL(memcpy_flushcache);

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 */
        dcache_clean_pop((unsigned long)to, (unsigned long)to + n - rc);
        return rc;
}