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authorGabe Black <gabeblack@chromium.org>2012-12-02 04:55:18 +0000
committerSimon Glass <sjg@chromium.org>2012-12-06 14:30:40 -0800
commit40fef0490610686022f99b8e070df7ac761c11a0 (patch)
treed3338158170744d00fb569ffac2edecbf72dbd2c /include
parentec516c489969c1c12e9b26900facee6efd60c938 (diff)
downloadu-boot-linaro-stable-40fef0490610686022f99b8e070df7ac761c11a0.tar.gz
Introduce arch_phys_memset which works like memset but on physical memory
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>
Diffstat (limited to 'include')
-rw-r--r--include/physmem.h21
1 files changed, 21 insertions, 0 deletions
diff --git a/include/physmem.h b/include/physmem.h
new file mode 100644
index 000000000..03d3a78b7
--- /dev/null
+++ b/include/physmem.h
@@ -0,0 +1,21 @@
+/*
+ * 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);