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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 /lib
parentec516c489969c1c12e9b26900facee6efd60c938 (diff)
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 'lib')
-rw-r--r--lib/Makefile1
-rw-r--r--lib/physmem.c24
2 files changed, 25 insertions, 0 deletions
diff --git a/lib/Makefile b/lib/Makefile
index e44e045233..f83f6e8d8c 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -48,6 +48,7 @@ COBJS-$(CONFIG_LMB) += lmb.o
COBJS-y += ldiv.o
COBJS-$(CONFIG_MD5) += md5.o
COBJS-y += net_utils.o
+COBJS-$(CONFIG_PHYSMEM) += physmem.o
COBJS-y += qsort.o
COBJS-$(CONFIG_SHA1) += sha1.o
COBJS-$(CONFIG_SHA256) += sha256.o
diff --git a/lib/physmem.c b/lib/physmem.c
new file mode 100644
index 0000000000..0f035edcbe
--- /dev/null
+++ b/lib/physmem.c
@@ -0,0 +1,24 @@
+/*
+ * 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.
+ */
+
+#include <common.h>
+#include <physmem.h>
+
+static phys_addr_t __arch_phys_memset(phys_addr_t s, int c, phys_size_t n)
+{
+ void *s_ptr = (void *)(uintptr_t)s;
+
+ assert(((phys_addr_t)(uintptr_t)s) == s);
+ assert(((phys_addr_t)(uintptr_t)(s + n)) == s + n);
+ return (phys_addr_t)(uintptr_t)memset(s_ptr, c, n);
+}
+
+phys_addr_t arch_phys_memset(phys_addr_t s, int c, phys_size_t n)
+ __attribute__((weak, alias("__arch_phys_memset")));