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x86: Enhance the microcode tool to support header files as input 

Sometimes microcode is delivered as a header file. Allow the tool to
support this as well as collecting multiple microcode blocks into a
single update.

Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2015-01-27 22:13:26 -07:00
parent 7f641d53bb
commit cfcf8ea2d7
1 changed files with 70 additions and 20 deletions
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90
tools/microcode-tool.py
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@ -76,6 +76,35 @@ def ParseFile(fname):
microcodes[name] = Microcode(name, data)
return date, license_text, microcodes
def ParseHeaderFiles(fname_list):
"""Parse a list of header files and return the component parts
Args:
fname_list: List of files to parse
Returns:
date: String containing date from the file's header
license_text: List of text lines for the license file
microcodes: List of Microcode objects from the file
"""
microcodes = {}
license_text = []
date = ''
name = None
for fname in fname_list:
name = os.path.basename(fname).lower()
name = os.path.splitext(name)[0]
data = []
with open(fname) as fd:
for line in fd:
line = line.rstrip()
# Omit anything after the last comma
words = line.split(',')[:-1]
data += [word + ',' for word in words]
microcodes[name] = Microcode(name, data)
return date, license_text, microcodes
def List(date, microcodes, model):
"""List the available microcode chunks
@ -129,13 +158,13 @@ def FindMicrocode(microcodes, model):
break
return found, tried
def CreateFile(date, license_text, mcode, outfile):
def CreateFile(date, license_text, mcodes, outfile):
"""Create a microcode file in U-Boot's .dtsi format
Args:
date: String containing date of original microcode file
license: List of text lines for the license file
mcode: Microcode object to write
mcodes: Microcode objects to write (normally only 1)
outfile: Filename to write to ('-' for stdout)
"""
out = '''/*%s
@ -159,15 +188,22 @@ intel,processor-flags = <%#x>;
data = <%s
\t>;'''
words = ''
for i in range(len(mcode.words)):
if not (i & 3):
words += '\n'
val = mcode.words[i]
# Change each word so it will be little-endian in the FDT
# This data is needed before RAM is available on some platforms so we
# cannot do an endianness swap on boot.
val = struct.unpack("<I", struct.pack(">I", val))[0]
words += '\t%#010x' % val
add_comments = len(mcodes) > 1
for mcode in mcodes:
if add_comments:
words += '\n/* %s */' % mcode.name
for i in range(len(mcode.words)):
if not (i & 3):
words += '\n'
val = mcode.words[i]
# Change each word so it will be little-endian in the FDT
# This data is needed before RAM is available on some platforms so
# we cannot do an endianness swap on boot.
val = struct.unpack("<I", struct.pack(">I", val))[0]
words += '\t%#010x' % val
# Use the first microcode for the headers
mcode = mcodes[0]
# Take care to avoid adding a space before a tab
text = ''
@ -187,8 +223,8 @@ data = <%s
print >> sys.stderr, "Creating directory '%s'" % MICROCODE_DIR
os.makedirs(MICROCODE_DIR)
outfile = os.path.join(MICROCODE_DIR, mcode.name + '.dtsi')
print >> sys.stderr, "Writing microcode for '%s' to '%s'" % (
mcode.name, outfile)
print >> sys.stderr, "Writing microcode for '%s' to '%s'" % (
', '.join([mcode.name for mcode in mcodes]), outfile)
with open(outfile, 'w') as fd:
print >> fd, out % tuple(args)
@ -198,8 +234,12 @@ def MicrocodeTool():
parser = OptionParser()
parser.add_option('-d', '--mcfile', type='string', action='store',
help='Name of microcode.dat file')
parser.add_option('-H', '--headerfile', type='string', action='append',
help='Name of .h file containing microcode')
parser.add_option('-m', '--model', type='string', action='store',
help='Model name to extract')
help="Model name to extract ('all' for all)")
parser.add_option('-M', '--multiple', type='string', action='store',
help="Allow output of multiple models")
parser.add_option('-o', '--outfile', type='string', action='store',
help='Filename to use for output (- for stdout), default is'
' %s/<name>.dtsi' % MICROCODE_DIR)
@ -224,9 +264,14 @@ def MicrocodeTool():
if cmd not in commands:
parser.error("Unknown command '%s'" % cmd)
if not options.mcfile:
parser.error('You must specify a microcode file')
date, license_text, microcodes = ParseFile(options.mcfile)
if (not not options.mcfile) != (not not options.mcfile):
parser.error("You must specify either header files or a microcode file, not both")
if options.headerfile:
date, license_text, microcodes = ParseHeaderFiles(options.headerfile)
elif options.mcfile:
date, license_text, microcodes = ParseFile(options.mcfile)
else:
parser.error('You must specify a microcode file (or header files)')
if cmd == 'list':
List(date, microcodes, options.model)
@ -236,16 +281,21 @@ def MicrocodeTool():
if not options.model:
parser.error('You must specify a model to create')
model = options.model.lower()
mcode_list, tried = FindMicrocode(microcodes, model)
if options.model == 'all':
options.multiple = True
mcode_list = microcodes.values()
tried = []
else:
mcode_list, tried = FindMicrocode(microcodes, model)
if not mcode_list:
parser.error("Unknown model '%s' (%s) - try 'list' to list" %
(model, ', '.join(tried)))
if len(mcode_list) > 1:
if not options.multiple and len(mcode_list) > 1:
parser.error("Ambiguous model '%s' (%s) matched %s - try 'list' "
"to list or specify a particular file" %
(model, ', '.join(tried),
', '.join([m.name for m in mcode_list])))
CreateFile(date, license_text, mcode_list[0], options.outfile)
CreateFile(date, license_text, mcode_list, options.outfile)
else:
parser.error("Unknown command '%s'" % cmd)