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Introduce arch_phys_memset which works like memset but on physical memory

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The default implementation of this function is just memset, but other
implementations will be needed when physical memory isn't accessible by
U-Boot using normal addressing mechanisms.

Signed-off-by: Gabe Black <gabeblack@chromium.org>
Signed-off-by: Che-Liang Chiou <clchiou@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Gabe Black
2012-12-02 04:55:18 +00:00
committed by Simon Glass
parent ec516c4899
commit 40fef04906
4 changed files with 54 additions and 0 deletions
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21
include/physmem.h Normal file
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/*
* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*/
/*
* These functions work like memset but operate on physical memory which may
* not be accessible directly.
*
* @param s The physical address to start setting memory at.
* @param c The character to set each byte of the region to.
* @param n The number of bytes to set.
*
* @return The physical address of the memory which was set.
*/
phys_addr_t arch_phys_memset(phys_addr_t s, int c, phys_size_t n);