mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-21 02:33:07 +00:00
879ca27656
Convert this tool to Python 3 and make it use that, to meet the 2020 deadline. Signed-off-by: Simon Glass <sjg@chromium.org>
316 lines
11 KiB
Python
Executable file
316 lines
11 KiB
Python
Executable file
#!/usr/bin/env python3
|
|
# SPDX-License-Identifier: GPL-2.0+
|
|
#
|
|
# Copyright (c) 2014 Google, Inc
|
|
#
|
|
# Intel microcode update tool
|
|
|
|
from optparse import OptionParser
|
|
import os
|
|
import re
|
|
import struct
|
|
import sys
|
|
|
|
MICROCODE_DIR = 'arch/x86/dts/microcode'
|
|
|
|
class Microcode:
|
|
"""Holds information about the microcode for a particular model of CPU.
|
|
|
|
Attributes:
|
|
name: Name of the CPU this microcode is for, including any version
|
|
information (e.g. 'm12206a7_00000029')
|
|
model: Model code string (this is cpuid(1).eax, e.g. '206a7')
|
|
words: List of hex words containing the microcode. The first 16 words
|
|
are the public header.
|
|
"""
|
|
def __init__(self, name, data):
|
|
self.name = name
|
|
# Convert data into a list of hex words
|
|
self.words = []
|
|
for value in ''.join(data).split(','):
|
|
hexval = value.strip()
|
|
if hexval:
|
|
self.words.append(int(hexval, 0))
|
|
|
|
# The model is in the 4rd hex word
|
|
self.model = '%x' % self.words[3]
|
|
|
|
def ParseFile(fname):
|
|
"""Parse a micrcode.dat file and return the component parts
|
|
|
|
Args:
|
|
fname: Filename to parse
|
|
Returns:
|
|
3-Tuple:
|
|
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
|
|
"""
|
|
re_date = re.compile('/\* *(.* [0-9]{4}) *\*/$')
|
|
re_license = re.compile('/[^-*+] *(.*)$')
|
|
re_name = re.compile('/\* *(.*)\.inc *\*/', re.IGNORECASE)
|
|
microcodes = {}
|
|
license_text = []
|
|
date = ''
|
|
data = []
|
|
name = None
|
|
with open(fname) as fd:
|
|
for line in fd:
|
|
line = line.rstrip()
|
|
m_date = re_date.match(line)
|
|
m_license = re_license.match(line)
|
|
m_name = re_name.match(line)
|
|
if m_name:
|
|
if name:
|
|
microcodes[name] = Microcode(name, data)
|
|
name = m_name.group(1).lower()
|
|
data = []
|
|
elif m_license:
|
|
license_text.append(m_license.group(1))
|
|
elif m_date:
|
|
date = m_date.group(1)
|
|
else:
|
|
data.append(line)
|
|
if name:
|
|
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:
|
|
license_start = False
|
|
license_end = False
|
|
for line in fd:
|
|
line = line.rstrip()
|
|
|
|
if len(line) >= 2:
|
|
if line[0] == '/' and line[1] == '*':
|
|
license_start = True
|
|
continue
|
|
if line[0] == '*' and line[1] == '/':
|
|
license_end = True
|
|
continue
|
|
if license_start and not license_end:
|
|
# Ignore blank line
|
|
if len(line) > 0:
|
|
license_text.append(line)
|
|
continue
|
|
# 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
|
|
|
|
Args:
|
|
date: Date of the microcode file
|
|
microcodes: Dict of Microcode objects indexed by name
|
|
model: Model string to search for, or None
|
|
"""
|
|
print('Date: %s' % date)
|
|
if model:
|
|
mcode_list, tried = FindMicrocode(microcodes, model.lower())
|
|
print('Matching models %s:' % (', '.join(tried)))
|
|
else:
|
|
print('All models:')
|
|
mcode_list = [microcodes[m] for m in list(microcodes.keys())]
|
|
for mcode in mcode_list:
|
|
print('%-20s: model %s' % (mcode.name, mcode.model))
|
|
|
|
def FindMicrocode(microcodes, model):
|
|
"""Find all the microcode chunks which match the given model.
|
|
|
|
This model is something like 306a9 (the value returned in eax from
|
|
cpuid(1) when running on Intel CPUs). But we allow a partial match,
|
|
omitting the last 1 or two characters to allow many families to have the
|
|
same microcode.
|
|
|
|
If the model name is ambiguous we return a list of matches.
|
|
|
|
Args:
|
|
microcodes: Dict of Microcode objects indexed by name
|
|
model: String containing model name to find
|
|
Returns:
|
|
Tuple:
|
|
List of matching Microcode objects
|
|
List of abbreviations we tried
|
|
"""
|
|
# Allow a full name to be used
|
|
mcode = microcodes.get(model)
|
|
if mcode:
|
|
return [mcode], []
|
|
|
|
tried = []
|
|
found = []
|
|
for i in range(3):
|
|
abbrev = model[:-i] if i else model
|
|
tried.append(abbrev)
|
|
for mcode in list(microcodes.values()):
|
|
if mcode.model.startswith(abbrev):
|
|
found.append(mcode)
|
|
if found:
|
|
break
|
|
return found, tried
|
|
|
|
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
|
|
mcodes: Microcode objects to write (normally only 1)
|
|
outfile: Filename to write to ('-' for stdout)
|
|
"""
|
|
out = '''/*%s
|
|
* ---
|
|
* This is a device tree fragment. Use #include to add these properties to a
|
|
* node.
|
|
*
|
|
* Date: %s
|
|
*/
|
|
|
|
compatible = "intel,microcode";
|
|
intel,header-version = <%d>;
|
|
intel,update-revision = <%#x>;
|
|
intel,date-code = <%#x>;
|
|
intel,processor-signature = <%#x>;
|
|
intel,checksum = <%#x>;
|
|
intel,loader-revision = <%d>;
|
|
intel,processor-flags = <%#x>;
|
|
|
|
/* The first 48-bytes are the public header which repeats the above data */
|
|
data = <%s
|
|
\t>;'''
|
|
words = ''
|
|
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 = ''
|
|
for line in license_text:
|
|
if line[0] == '\t':
|
|
text += '\n *' + line
|
|
else:
|
|
text += '\n * ' + line
|
|
args = [text, date]
|
|
args += [mcode.words[i] for i in range(7)]
|
|
args.append(words)
|
|
if outfile == '-':
|
|
print(out % tuple(args))
|
|
else:
|
|
if not outfile:
|
|
if not os.path.exists(MICROCODE_DIR):
|
|
print("Creating directory '%s'" % MICROCODE_DIR, file=sys.stderr)
|
|
os.makedirs(MICROCODE_DIR)
|
|
outfile = os.path.join(MICROCODE_DIR, mcode.name + '.dtsi')
|
|
print("Writing microcode for '%s' to '%s'" % (
|
|
', '.join([mcode.name for mcode in mcodes]), outfile), file=sys.stderr)
|
|
with open(outfile, 'w') as fd:
|
|
print(out % tuple(args), file=fd)
|
|
|
|
def MicrocodeTool():
|
|
"""Run the microcode tool"""
|
|
commands = 'create,license,list'.split(',')
|
|
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 ('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)
|
|
parser.usage += """ command
|
|
|
|
Process an Intel microcode file (use -h for help). Commands:
|
|
|
|
create Create microcode .dtsi file for a model
|
|
list List available models in microcode file
|
|
license Print the license
|
|
|
|
Typical usage:
|
|
|
|
./tools/microcode-tool -d microcode.dat -m 306a create
|
|
|
|
This will find the appropriate file and write it to %s.""" % MICROCODE_DIR
|
|
|
|
(options, args) = parser.parse_args()
|
|
if not args:
|
|
parser.error('Please specify a command')
|
|
cmd = args[0]
|
|
if cmd not in commands:
|
|
parser.error("Unknown command '%s'" % cmd)
|
|
|
|
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)
|
|
elif cmd == 'license':
|
|
print('\n'.join(license_text))
|
|
elif cmd == 'create':
|
|
if not options.model:
|
|
parser.error('You must specify a model to create')
|
|
model = options.model.lower()
|
|
if options.model == 'all':
|
|
options.multiple = True
|
|
mcode_list = 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 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, options.outfile)
|
|
else:
|
|
parser.error("Unknown command '%s'" % cmd)
|
|
|
|
if __name__ == "__main__":
|
|
MicrocodeTool()
|