Rename tools/ directory to scripts/ directory.

It's common for other projects (eg, QEMU, Linux) to put build scripts
into a "scripts/" directory.  There's no reason for SeaBIOS to be
different, so rename the "tools/" directory to "scripts/".

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

1 files changed, 88 insertions, 0 deletions

diff --git a/scripts/checkrom.py b/scripts/checkrom.py
new file mode 100755
index 0000000..6f07ac8
--- /dev/null
+++ b/scripts/checkrom.py
@@ -0,0 +1,88 @@
+#!/usr/bin/env python
+# Script to check a bios image and report info on it.
+#
+# Copyright (C) 2008  Kevin O'Connor <kevin@koconnor.net>
+#
+# This file may be distributed under the terms of the GNU GPLv3 license.
+
+import sys
+import layoutrom
+
+def subst(data, offset, new):
+    return data[:offset] + new + data[offset + len(new):]
+
+def checksum(data, start, size, csum):
+    sumbyte = 0
+    while size:
+        sumbyte = sumbyte + ord(data[start + size - 1])
+        size = size - 1
+    sumbyte = (0x100 - sumbyte) & 0xff
+    return subst(data, start+csum, chr(sumbyte))
+
+def main():
+    # Get args
+    objinfo, rawfile, outfile = sys.argv[1:]
+
+    # Read in symbols
+    objinfofile = open(objinfo, 'rb')
+    symbols = layoutrom.parseObjDump(objinfofile, 'in')[1]
+
+    # Read in raw file
+    f = open(rawfile, 'rb')
+    rawdata = f.read()
+    f.close()
+    datasize = len(rawdata)
+    finalsize = 64*1024
+    if datasize > 64*1024:
+        finalsize = 128*1024
+        if datasize > 128*1024:
+            finalsize = 256*1024
+
+    # Sanity checks
+    start = symbols['code32flat_start'].offset
+    end = symbols['code32flat_end'].offset
+    expend = layoutrom.BUILD_BIOS_ADDR + layoutrom.BUILD_BIOS_SIZE
+    if end != expend:
+        print "Error!  Code does not end at 0x%x (got 0x%x)" % (
+            expend, end)
+        sys.exit(1)
+    if datasize > finalsize:
+        print "Error!  Code is too big (0x%x vs 0x%x)" % (
+            datasize, finalsize)
+        sys.exit(1)
+    expdatasize = end - start
+    if datasize != expdatasize:
+        print "Error!  Unknown extra data (0x%x vs 0x%x)" % (
+            datasize, expdatasize)
+        sys.exit(1)
+
+    # Fix up CSM Compatibility16 table
+    if 'csm_compat_table' in symbols and 'entry_csm' in symbols:
+        # Field offsets within EFI_COMPATIBILITY16_TABLE
+        ENTRY_FIELD_OFS = 14 # Compatibility16CallOffset (UINT16)
+        SIZE_FIELD_OFS = 5   # TableLength (UINT8)
+        CSUM_FIELD_OFS = 4   # TableChecksum (UINT8)
+
+        tableofs = symbols['csm_compat_table'].offset - symbols['code32flat_start'].offset
+        entry_addr = symbols['entry_csm'].offset - layoutrom.BUILD_BIOS_ADDR
+        byte1 = chr(entry_addr & 0xff)
+        byte2 = chr(entry_addr >> 8)
+        rawdata = subst(rawdata, tableofs+ENTRY_FIELD_OFS, byte1+byte2)
+
+        tablesize = ord(rawdata[tableofs+SIZE_FIELD_OFS])
+        rawdata = checksum(rawdata, tableofs, tablesize, CSUM_FIELD_OFS)
+
+    # Print statistics
+    runtimesize = end - symbols['code32init_end'].offset
+    print "Total size: %d  Fixed: %d  Free: %d (used %.1f%% of %dKiB rom)" % (
+        datasize, runtimesize, finalsize - datasize
+        , (datasize / float(finalsize)) * 100.0
+        , finalsize / 1024)
+
+    # Write final file
+    f = open(outfile, 'wb')
+    f.write(("\0" * (finalsize - datasize)) + rawdata)
+    f.close()
+
+if __name__ == '__main__':
+    main()