From b6b1077eec1a2afa84d0c8d469ad2e339cb775ef Mon Sep 17 00:00:00 2001
From: Gabe Black <gabeblack@google.com>
Date: Sun, 8 Dec 2013 12:48:45 -0800
Subject: exynos: Install the BL1 and set the checksum in the Makefile.

Install the BL1 and set up the checksum in the Makefile instead of relying on
post processing. Import the exynos checksum script, split it in two and
simplify it significantly. Stop putting the CBFS header in the midst of the
bootblock so that it can be checksummed before CBFS is put together. Stop
saving space for it and leaving an anchor in the bootblock which nobody looks
for.

Change-Id: Icbb5a5914ece60b2827433b6dc29d80db996ea6c
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://chromium-review.googlesource.com/179229
Reviewed-by: Ronald Minnich <rminnich@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit aa3a416705517c0a6ddfdeb19905ac8cafb33df1)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6834
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
---
 util/exynos/fixed_cksum.py    | 59 +++++++++++++++++++++++++++++++++++++++++++
 util/exynos/variable_cksum.py | 59 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 118 insertions(+)
 create mode 100755 util/exynos/fixed_cksum.py
 create mode 100755 util/exynos/variable_cksum.py

(limited to 'util/exynos')

diff --git a/util/exynos/fixed_cksum.py b/util/exynos/fixed_cksum.py
new file mode 100755
index 0000000000..66da06025d
--- /dev/null
+++ b/util/exynos/fixed_cksum.py
@@ -0,0 +1,59 @@
+#!/usr/bin/env python
+#
+# Copyright (C) 2013 Google Inc.
+#
+# 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.
+# 3. The name of the author may not be used to endorse or promote products
+#    derived from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+
+"""
+This utility computes and fills Exynos ROM checksum (for BL1 or BL2).
+(Algorithm from U-Boot: tools/mkexynosspl.c)
+
+Input: IN OUT DATA_SIZE
+
+Output:
+
+  IN padded out to DATA_SIZE, checksum at the end, written to OUT.
+"""
+
+import struct
+import sys
+
+def main(argv):
+  if len(argv) != 4:
+    exit('usage: %s IN OUT DATA_SIZE' % argv[0])
+
+  in_name, out_name = argv[1:3]
+  size = int(argv[3], 0)
+  checksum_format = "<I"
+  with open(in_name, "rb") as in_file, open(out_name, "wb") as out_file:
+    data = in_file.read()
+    checksum_size = struct.calcsize(checksum_format)
+    data_size = size - checksum_size
+    assert len(data) <= data_size
+    checksum = struct.pack(checksum_format, sum(map(ord, data)))
+    out_file.write(data + bytearray(data_size - len(data)) + checksum)
+
+
+if __name__ == '__main__':
+  main(sys.argv)
diff --git a/util/exynos/variable_cksum.py b/util/exynos/variable_cksum.py
new file mode 100755
index 0000000000..75cdc74f87
--- /dev/null
+++ b/util/exynos/variable_cksum.py
@@ -0,0 +1,59 @@
+#!/usr/bin/env python
+#
+# Copyright (C) 2013 Google Inc.
+#
+# 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.
+# 3. The name of the author may not be used to endorse or promote products
+#    derived from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+
+"""
+This utility computes and fills Exynos ROM checksum (for BL1 or BL2).
+(Algorithm from U-Boot: tools/mkexynosspl.c)
+
+Input: IN OUT
+
+Output:
+
+  Checksum header added to IN and written to OUT.
+  Header: uint32_t size, checksum, reserved[2].
+"""
+
+import struct
+import sys
+
+def main(argv):
+  if len(argv) != 3:
+    exit('usage: %s IN OUT' % argv[0])
+
+  in_name, out_name = argv[1:3]
+  header_format = "<IIII"
+  with open(in_name, "rb") as in_file, open(out_name, "wb") as out_file:
+    data = in_file.read()
+    header = struct.pack(header_format,
+                         struct.calcsize(header_format) + len(data),
+                         sum(map(ord, data)),
+                         0, 0)
+    out_file.write(header + data)
+
+
+if __name__ == '__main__':
+  main(sys.argv)
-- 
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