include/lib/utils.h

/*
 * Copyright (c) 2016-2017, ARM Limited and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#ifndef __UTILS_H__
#define __UTILS_H__

#if !ERROR_DEPRECATED
#include <utils_def.h>
#endif

/*
 * C code should be put in this part of the header to avoid breaking ASM files
 * or linker scripts including it.
 */
#if !(defined(__LINKER__) || defined(__ASSEMBLY__))

#include <types.h>

/*
 * Fill a region of normal memory of size "length" in bytes with zero bytes.
 *
 * WARNING: This function can only operate on normal memory. This means that
 *          the MMU must be enabled when using this function. Otherwise, use
 *          zeromem.
 */
void zero_normalmem(void *mem, u_register_t length);

/*
 * Fill a region of memory of size "length" in bytes with null bytes.
 *
 * Unlike zero_normalmem, this function has no restriction on the type of
 * memory targeted and can be used for any device memory as well as normal
 * memory. This function must be used instead of zero_normalmem when MMU is
 * disabled.
 *
 * NOTE: When data cache and MMU are enabled, prefer zero_normalmem for faster
 *       zeroing.
 */
void zeromem(void *mem, u_register_t length);
#endif /* !(defined(__LINKER__) || defined(__ASSEMBLY__)) */

#endif /* __UTILS_H__ */