add c++ version of the firmware utilities

reboot_mode.py

Index: reboot_mode.py
diff --git a/reboot_mode.py b/reboot_mode.py
deleted file mode 100644
index 18f336fd565a9a047f3d7b0456cc7826ef2754fd..0000000000000000000000000000000000000000
--- a/reboot_mode.py
+++ /dev/null
@@ -1,171 +0,0 @@
-#!/usr/bin/python
-
-# Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-"""A script to manipulate ChromeOS CMOS reboot Field.
-
-A few bits in a byte in CMOS (called RDB, short for 'Reboot Data Byte'
-hereafter) are dedicated to information exchange between Linux and BIOS.
-
-The CMOS contents are available through /dev/nvrom. The location of RDB is
-reported by BIOS through ACPI. The few bits in RDB operated on by this script
-are defined in the all_mode_fields dictionary below along with their
-functions.
-
-When invoked without parameters this script prints values of the fields. When
-invoked with any of the bit field names as parameter(s), the script sets the
-bit(s) as required.
-
-Additional parameters allow to specify alternative ACPI and NVRAM files for
-testing.
-"""
-
-__author__ = 'The Chromium OS Authors'
-
-import optparse
-import sys
-
-class RebootModeError(Exception):
-  pass
-
-# global variables
-parser = optparse.OptionParser()
-acpi_file = '/sys/devices/platform/chromeos_acpi/CHNV'
-nvram_file = '/dev/nvram'
-
-# Offset of RDB in NVRAM
-rdb_offset = 0
-
-# NVRAM contents read on startup
-rdb_value = ''
-
-# All bitfields in RDB this script provides access to. Field names prepended
-# by `--' become this script's command line options
-all_mode_fields = {
-    'recovery' : 0x80,
-    'debug_reset' : 0x40,
-    'try_firmware_b': 0x20
-    }
-
-# A dictionary of fields to be updated as requested by the command line
-# parameters
-fields_to_set = {}
-
-
-def OptionHandler(option, opt_str, value, p):
-  """Process bit field name command line parameter.
-
-  Verifies that the value is in range (0 or 1) and adds the appropriate
-  element to fields_to_set dictionary. Should the same field specified in the
-  command line more than once, only the last value will be used.
-
-  Raises:
-    RebootModeError in case the parameter value is out of range.
-  """
-
-  global fields_to_set
-  key = opt_str[2:]
-  if value < 0 or value > 1:
-    raise RebootModeError('--%s should be either 0 or 1' % key)
-
-  fields_to_set[key] = value
-
-
-def PrepareOptions():
-  global parser
-  for field in all_mode_fields:
-    parser.add_option('--' + field, action='callback', type='int',
-                      callback=OptionHandler)
-  parser.add_option('--acpi_file', dest='acpi_file')
-  parser.add_option('--nvram_file', dest='nvram_file')
-
-
-def ParseOptions():
-  global acpi_file
-  global nvram_file
-  (opts, args) = parser.parse_args()
-
-  if opts.acpi_file is not None:
-    acpi_file = opts.acpi_file
-
-  if opts.nvram_file is not None:
-    nvram_file = opts.nvram_file
-
-
-def GetRDBOffset():
-  global rdb_offset
-  try:
-    f = open(acpi_file, 'r')
-    rdb_offset = int(f.read())
-    f.close()
-  except IOError, e:
-    raise RebootModeError('Trying to read %s got this: %s' % (acpi_file, e))
-  except ValueError:
-    raise RebootModeError('%s contents are corrupted' % acpi_file)
-
-
-def ReadNvram():
-  global rdb_value
-  try:
-    f = open(nvram_file, 'rb')
-    f.seek(rdb_offset)
-    rdb_value = ord(f.read(1)[0])
-    f.close()
-  except IOError, e:
-    if e[0] == 2:
-      raise RebootModeError(
-          '%s does not exist. Is nvram module installed?' % nvram_file)
-    if e[0] == 13:
-      raise RebootModeError('Access to %s denied. Are you root?' % nvram_file)
-    raise RebootModeError(e[1])
-  except IndexError, e:
-    raise RebootModeError('Failed reading mode byte from %s' % nvram_file)
-
-
-def PrintCurrentMode():
-  print 'Current reboot mode settings:'
-  for (field, mask) in all_mode_fields.iteritems():
-    print '%-15s: %d' % (field, int(not not (rdb_value & mask)))
-
-
-def SetNewMode():
-  new_mode = 0
-  updated_bits_mask = 0
-
-  for (opt, value) in fields_to_set.iteritems():
-    mask = all_mode_fields[opt]
-    if value:
-      new_mode |= mask
-    updated_bits_mask |= mask
-
-  if (rdb_value & updated_bits_mask) == new_mode:
-    print 'No update required'
-    return
-
-  f = open(nvram_file, 'rb+')
-  f.seek(rdb_offset)
-  new_mode |= (rdb_value & ~updated_bits_mask)
-  f.write('%c' % new_mode)
-  f.close()
-
-
-def DoRebootMode():
-  PrepareOptions()
-  ParseOptions()
-  GetRDBOffset()
-  ReadNvram()
-  if fields_to_set:
-    SetNewMode()
-  else:
-    PrintCurrentMode()
-
-
-if __name__ == '__main__':
-  try:
-    DoRebootMode()
-  except RebootModeError, e:
-    print >> sys.stderr, '%s: %s' % (sys.argv[0].split('/')[-1], e)
-    sys.exit(1)
-  sys.exit(0)