[M] Change in coreboot[main]: util/inteltool: Add gen_coreboot_ifd.py

[Shuo Liu (Code Review)]

Attention is currently required from: Pratikkumar V Prajapati.

Shuo Liu has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/86577?usp=email )

Change subject: util/inteltool: Add gen_coreboot_ifd.py
......................................................................

util/inteltool: Add gen_coreboot_ifd.py

This tool takes an UEFI IFWI, extract the IFD and update its content
to support 16MB+ BIOS region.

DoC ID referred to: 642713

Change-Id: Ieb01e295ea1fbb08a1c7d19a536a55e4dcd6f9c1
Signed-off-by: Shuo Liu 
---
A util/inteltool/gen_coreboot_ifd.py
1 file changed, 71 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/77/86577/1

diff --git a/util/inteltool/gen_coreboot_ifd.py b/util/inteltool/gen_coreboot_ifd.py
new file mode 100644
index 0000000..99ea0a6
--- /dev/null
+++ b/util/inteltool/gen_coreboot_ifd.py
@@ -0,0 +1,71 @@
+#! /usr/bin/env python3
+#
+# SPDX-License-Identifier: BSD-3-Clause
+
+import sys
+import getopt
+
+def ifd_replace(input_file, output_file, bios_size):
+    #
+    # Extract the first 4K of UEFI IFWI binary
+    #
+    with open(input_file,"rb") as input:
+        first_4k = input.read(4 * 1024)
+    with open(output_file,"wb") as output:
+        output.write(first_4k)
+
+    #
+    # Replace the data
+    #
+    with open(output_file,"r+b") as file:
+	# 1. 0x15    -- Number of Components
+	# Chapter 4.1.1.2 of Doc#642713
+        data = b'\x00'
+        hex_offset = '0x15'
+        offset=int(hex_offset,16)
+        file.seek(offset)
+        file.write(data)
+
+        # 2. 0x44    -- Flash Region Base Address (BIOS)
+        # Chapter 4.1.3.2 of Doc#642713
+        if bios_size == '16M':
+            data = b'\x00\x30\xFF\x3F'
+        elif bios_size == '32M':
+            data = b'\x00\x20\xFF\x3F'
+        elif bios_size == '48M':
+            data = b'\x00\x10\xFF\x3F'
+        hex_offset = '0x44'             # FRBA + 004h
+        offset=int(hex_offset,16)
+        file.seek(offset)
+        file.write(data)
+
+        # 3. 0x48-0x7F   -- Flash Region Base Address (Reserved)
+        # Chapter 4.1.3.3 of Doc#642713
+        num = 14                        # Number of Flash Region
+        data = b'\xFF\x7F\x00\x00'      # 7FFFh is not used data
+        hex_offset = '0x48'             # FRBA + 008h
+        offset=int(hex_offset,16)
+        file.seek(offset)
+        # Go through flash region from 2 to 15
+        for _ in range(num):
+            file.write(data)
+
+    print(output_file + ' is generated.')
+
+if __name__ == '__main__':
+    print('Creating Flash Descriptor...')
+    argv = sys.argv[1:]
+    try:
+        opts, args = getopt.getopt(argv, "b:")
+    except:
+        print ('ERROR: Incorrect arguments! -b <UEFI IFWI>')
+        print ('For example: gen_coreboot_ifd.py -b BHSDCRB1.xxx_SP_1.bin')
+        sys.exit(2)
+
+    for opt, arg in opts:
+        if opt in ['-b']:
+            binary = arg
+
+    ifd_replace(binary, 'descriptor_16m.bin','16M')
+    ifd_replace(binary, 'descriptor_32m.bin','32M')
+    ifd_replace(binary, 'descriptor_48m.bin','48M')