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authorAnthony Gutierrez <atgutier@umich.edu>2013-02-15 18:48:59 -0500
committerAnthony Gutierrez <atgutier@umich.edu>2013-02-15 18:48:59 -0500
commitba983f9387a703f3be8149382d4f0dcfb2009b6c (patch)
tree150af91f0ddd6de0b4138e75c317ef3f1cab4ce3 /ext/libfdt/fdt_wip.c
parentbd31a5dc18def5972967a595d65266d1f9ff05cb (diff)
downloadgem5-ba983f9387a703f3be8149382d4f0dcfb2009b6c.tar.xz
ext lib: add libfdt to enable flattened device tree support
this patch adds libfdt, a library necessary for supporting flattened device tree support in current and future versions of the linux/android kernel for ARM.
Diffstat (limited to 'ext/libfdt/fdt_wip.c')
-rw-r--r--ext/libfdt/fdt_wip.c97
1 files changed, 97 insertions, 0 deletions
diff --git a/ext/libfdt/fdt_wip.c b/ext/libfdt/fdt_wip.c
new file mode 100644
index 000000000..19d210e1d
--- /dev/null
+++ b/ext/libfdt/fdt_wip.c
@@ -0,0 +1,97 @@
+/*
+ * libfdt - Flat Device Tree manipulation
+ * Copyright (C) 2006 David Gibson, IBM Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ * 2. Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <fdt.h>
+#include <libfdt.h>
+
+#include "libfdt_env.h"
+#include "libfdt_internal.h"
+
+int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
+ const void *val, int len)
+{
+ void *propval;
+ int proplen;
+
+ propval = fdt_getprop_w(fdt, nodeoffset, name, &proplen);
+ if (! propval)
+ return proplen;
+
+ if (proplen != len)
+ return -FDT_ERR_NOSPACE;
+
+ memcpy(propval, val, len);
+ return 0;
+}
+
+static void _fdt_nop_region(void *start, int len)
+{
+ fdt32_t *p;
+
+ for (p = start; (char *)p < ((char *)start + len); p++)
+ *p = cpu_to_fdt32(FDT_NOP);
+}
+
+int fdt_nop_property(void *fdt, int nodeoffset, const char *name)
+{
+ struct fdt_property *prop;
+ int len;
+
+ prop = fdt_get_property_w(fdt, nodeoffset, name, &len);
+ if (! prop)
+ return len;
+
+ _fdt_nop_region(prop, len + sizeof(*prop));
+
+ return 0;
+}
+
+int _fdt_node_end_offset(void *fdt, int offset)
+{
+ int depth = 0;
+
+ while ((offset >= 0) && (depth >= 0))
+ offset = fdt_next_node(fdt, offset, &depth);
+
+ return offset;
+}
+
+int fdt_nop_node(void *fdt, int nodeoffset)
+{
+ int endoffset;
+
+ endoffset = _fdt_node_end_offset(fdt, nodeoffset);
+ if (endoffset < 0)
+ return endoffset;
+
+ _fdt_nop_region(fdt_offset_ptr_w(fdt, nodeoffset, 0),
+ endoffset - nodeoffset);
+ return 0;
+}