On 14-07-30 06:25 PM, Marek Vasut wrote:
On Thursday, June 26, 2014 at 10:13:21 PM, Steve Rae wrote:
- to prepare for the support of fastboot sparse images
Signed-off-by: Steve Rae <s...@broadcom.com>
---
This file is ASIS from:
https://raw.githubusercontent.com/AOSB/android_system_core/master/libspars
e/sparse_format.h (commit 28fa5bc347390480fe190294c6c385b6a9f0d68b)
except for the __UBOOT__ conditional include.
Changes in v3: None
Changes in v2: None
include/sparse_format.h | 58
+++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 58
insertions(+)
create mode 100644 include/sparse_format.h
diff --git a/include/sparse_format.h b/include/sparse_format.h
new file mode 100644
index 0000000..21fbd05
--- /dev/null
+++ b/include/sparse_format.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied. + * See the License for the specific language governing
permissions and + * limitations under the License.
Please use the SPDX licence identifiers (pelase see Licenses/README)?
+ */
+
+#ifndef _LIBSPARSE_SPARSE_FORMAT_H_
+#define _LIBSPARSE_SPARSE_FORMAT_H_
+#define __UBOOT__
+#ifndef __UBOOT__
+#include "sparse_defs.h"
+#endif
+
+typedef struct sparse_header {
+ __le32 magic; /* 0xed26ff3a */
+ __le16 major_version; /* (0x1) - reject images with higher major
versions */ + __le16 minor_version; /* (0x0) - allow images with higer
minor versions */ + __le16 file_hdr_sz; /* 28 bytes for first revision
of
the file format */ + __le16 chunk_hdr_sz; /* 12 bytes for first revision
of the file format */ + __le32 blk_sz; /* block size in bytes,
must be a
multiple of 4 (4096) */ + __le32 total_blks; /* total blocks in the
non-sparse output image */ + __le32 total_chunks; /* total chunks in the
sparse input image */ + __le32 image_checksum; /* CRC32 checksum of the
original data, counting "don't care" */ + /* as 0.
Standard 802.3
polynomial, use a Public Domain */
+ /* table implementation */
+} sparse_header_t;
+
+#define SPARSE_HEADER_MAGIC 0xed26ff3a
+
+#define CHUNK_TYPE_RAW 0xCAC1
+#define CHUNK_TYPE_FILL 0xCAC2
+#define CHUNK_TYPE_DONT_CARE 0xCAC3
+#define CHUNK_TYPE_CRC32 0xCAC4
+
+typedef struct chunk_header {
+ __le16 chunk_type; /* 0xCAC1 -> raw; 0xCAC2 -> fill; 0xCAC3 ->
don't
care */ + __le16 reserved1;
+ __le32 chunk_sz; /* in blocks in output image */
+ __le32 total_sz; /* in bytes of chunk input file including chunk
header
and data */ +} chunk_header_t;
+
+/* Following a Raw or Fill or CRC32 chunk is data.
The comment here is not aligned with coding style, I'll leave fixing it up to
you, since the license header text needs revisiting.
+ * For a Raw chunk, it's the data in chunk_sz * blk_sz.
+ * For a Fill chunk, it's 4 bytes of the fill data.
+ * For a CRC32 chunk, it's 4 bytes of CRC32
+ */
+
+#endif
To clarify:
I am taking this file ASIS from the location stated in the commit
message....
Do we _really_ want to modify _anything_ in this file (especially when
the content is not changing); or do we want to leaving it pristine?
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