Class: Origen::Registers::Reg

Inherits:
Object
  • Object
show all
Includes:
SubBlocks::Domains, SubBlocks::Path
Defined in:
lib/origen/registers/reg.rb

Overview

The register class can be used to represent not only h/ware resgisters, but really any entity which has an address and data component, such as a specific RAM location.
Any registers instantiated through Origen::Registers#add_reg are instances of this class.

All methods in BitCollection can also be called on a Reg object.

Constant Summary collapse

REG_LEVEL_ATTRIBUTES =

These attributes can be defined on a register at definition time and will get applied to all of its contained bits unless a specific bit has its own definition of the same attribute

{
  _feature:   {},
  _reset:     { aliases: [:res] },
  _memory:    {},
  _path:      { aliases: [:hdl_path] },
  _abs_path:  { aliases: [:absolute_path] },
  _access:    {},
  _bit_order: {}
}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from SubBlocks::Domains

#domain, #domain_specified?, #domains

Methods included from SubBlocks::Path

#abs_path, #abs_path=, #path, #path=, #path_var

Constructor Details

#initialize(owner, address, size, name, options = {}) ⇒ Reg

Normally shouldn't be called directly, instantiate through add_reg Upon initialization bits are stored as follows: An array of bit objects in position order, @bits corresponds to the bit as position r A Hash lookup table for quickly accessing bit objects by name



63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
# File 'lib/origen/registers/reg.rb', line 63

def initialize(owner, address, size, name, options = {}) # :nodoc:
  @owner = owner
  @address = address
  @size = size
  @bits = []
  @lookup = {}
  @name = name
  @init_as_writable = options.delete(:init_as_writable)
  @define_file = options.delete(:define_file)
  @from_placeholder = options.delete(:from_placeholder) || false
  REG_LEVEL_ATTRIBUTES.each do |attribute, _meta|
    if @from_placeholder
      instance_variable_set("@#{attribute[1..-1]}", options.delete(attribute))
    else
      # If register creation is coming directly from Reg.new, instead of Placeholder,
      #   it may not have attributes with '_' prefix
      instance_variable_set("@#{attribute[1..-1]}", options.delete(attribute[1..-1].to_sym))
    end
  end
  @description_from_api = {}
  description = options.delete(:description)
  if description
    @description_from_api[:_reg] = description.split(/\r?\n/)
  end
  @meta = .merge(options.delete(:meta) || {})

  # Initialize with unwritable bits that read back as zero, can override this
  # to make all writable by default by setting the :init_writable option to true
  @size.times do |n|
    @bits << Bit.new(self, n, writable: @init_as_writable, undefined: true)
  end

  # Internally re-map msb0 register descriptions as lsb0
  options.each_value { |bit_desc| bit_desc[:pos] = @size - bit_desc[:pos] - bit_desc[:bits] } if bit_order == :msb0

  add_bits_from_options(options)

  @msb0_delegator = Msb0Delegator.new(self, @bits)
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args, &block) ⇒ Object

All other Reg methods are delegated to BitCollection



1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
# File 'lib/origen/registers/reg.rb', line 1265

def method_missing(method, *args, &block) # :nodoc:
  wbo = :lsb0
  if args.last.is_a?(Hash)
    wbo = args.last[:with_bit_order] if args.last.key?(:with_bit_order)
  end

  if method.to_sym == :to_ary || method.to_sym == :to_hash
    nil
  elsif (method)
    (method, *args)
  else
    if BitCollection.instance_methods.include?(method)
      to_bit_collection(with_bit_order: wbo).send(method, *args, &block)
    elsif has_bits?(method)
      bits(method, with_bit_order: wbo)
    else
      super
    end
  end
end

Instance Attribute Details

#address(options = {}) ⇒ Object Also known as: addr

Returns the register address added to its current base_address value (if any).

Parameters:

  • options (Hash) (defaults to: {})

Options Hash (options):

  • :relative (Boolean) — default: false

    Return the address without adding the base address (if present)



837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
# File 'lib/origen/registers/reg.rb', line 837

def address(options = {})
  options = {
    relative: false
  }.merge(options)
  address = @address
  domain_option = options[:domains] || options[:domain]
  @domain_option ||= domain_option unless frozen?
  # Blow the cache when the domain option changes
  @base_address_applied = nil unless @domain_option == domain_option
  unless @base_address_applied
    # Give highest priority to the original API which allowed the object
    # doing register read/write to define a base_address method
    if (writer && writer.methods.include?(:base_address) && writer.method(:base_address).arity != 0) ||
       (reader && reader.methods.include?(:base_address) && reader.method(:base_address).arity != 0)
      # This currently assumes that the base address is always the same
      # for reading and writing
      if writer && writer.respond_to?(:base_address) && writer.method(:base_address).arity != 0
        self.base_address = writer.base_address(self)
      elsif reader && reader.respond_to?(:base_address) && reader.method(:base_address).arity != 0
        self.base_address = reader.base_address(self)
      end
    else
      o = owner.is_a?(Container) ? owner.owner : owner
      d = domain_option || domains
      if o && o.reg_base_address(domain: d)
        self.base_address = o.reg_base_address(domain: d)
      end
    end
    @base_address_applied = true
  end
  unless options[:relative]
    address += base_address if base_address
  end
  if options[:address_type]
    Origen.deprecate 'Specifying the address_type of a register address will be removed from Origen 3'
    case options[:address_type]
      when :byte
        address = address * 2
      when :word
        address = address
      when :longword
        address = address / 2
      else
        fail 'Unknown address type requested!'
    end
  end
  address
end

#base_addressObject

The base address of the register, this will be set dynamically by Origen based on the parent's base address



34
35
36
# File 'lib/origen/registers/reg.rb', line 34

def base_address
  @base_address
end

#define_fileObject (readonly)

Returns a full path to the file in which the register was defined



46
47
48
# File 'lib/origen/registers/reg.rb', line 46

def define_file
  @define_file
end

#featureObject

Any feature associated with the register



41
42
43
# File 'lib/origen/registers/reg.rb', line 41

def feature
  @feature
end

#grows_backwardsObject

:nodoc:



43
44
45
# File 'lib/origen/registers/reg.rb', line 43

def grows_backwards
  @grows_backwards
end

#lookupObject

:nodoc:



44
45
46
# File 'lib/origen/registers/reg.rb', line 44

def lookup
  @lookup
end

#memoryObject

If the given register's reset data is backed by memory, the memory address can be recorded in this attribute



53
54
55
# File 'lib/origen/registers/reg.rb', line 53

def memory
  @memory
end

#metaObject Also known as: meta_data, metadata

Returns any application-specific meta-data attatched to the given register



48
49
50
# File 'lib/origen/registers/reg.rb', line 48

def meta
  @meta
end

#nameObject

The register name



39
40
41
# File 'lib/origen/registers/reg.rb', line 39

def name
  @name
end

#ownerObject (readonly) Also known as: parent

Returns the object that own the register.

Example

$soc.reg(:blah).owner   # Returns the $soc object


30
31
32
# File 'lib/origen/registers/reg.rb', line 30

def owner
  @owner
end

#sizeObject (readonly)

Returns an integer representing the number of bits in the register



37
38
39
# File 'lib/origen/registers/reg.rb', line 37

def size
  @size
end

Class Method Details

.clean_value(value) ⇒ Object

Cleans an input value, in some cases it could be a register object, or an explicit value. This will return an explicit value in either case.



1384
1385
1386
1387
# File 'lib/origen/registers/reg.rb', line 1384

def self.clean_value(value) # :nodoc:
  value = value.val if value.respond_to?('val')  # Pull out the data value if a reg object has been passed in
  value
end

.dummy(size = 16) ⇒ Object

Returns a dummy register object that can be used on the fly, this can sometimes be useful to configure an intricate read operation.

Example

# Read bit 5 of RAM address 0xFFFF1280
dummy = Reg.dummy           # Create a dummy reg to configure the read operation
dummy.address = 0xFFFF1280  # Set the address
dummy.bit(5).read!(1)       # Read bit 5 expecting a 1


563
564
565
# File 'lib/origen/registers/reg.rb', line 563

def self.dummy(size = 16)
  Reg.new(self, 0, size, :dummy, init_as_writable: true)
end

Instance Method Details

#&(val) ⇒ Object

Returns the BITWISE AND of reg with another reg or a number, the state of both registers remains unchanged

Example

reg(:data).write(0x5555)
reg(:data2).write(0xFFFF)
reg(:data) & 0xFF00         # => 0x5500
reg(:data) & reg(:data2)    # => 0x5555


1348
1349
1350
# File 'lib/origen/registers/reg.rb', line 1348

def &(val)
  data & Reg.clean_value(val)
end

#*(val) ⇒ Object

Returns the PRODUCT of reg with another reg or a number, the state of both registers remains unchanged



1378
1379
1380
# File 'lib/origen/registers/reg.rb', line 1378

def *(val)
  data * Reg.clean_value(val)
end

#+(val) ⇒ Object

Returns the SUM of reg with another reg or a number, the state of both registers remains unchanged



1360
1361
1362
# File 'lib/origen/registers/reg.rb', line 1360

def +(val)
  data + Reg.clean_value(val)
end

#-(val) ⇒ Object

Returns the SUBTRACTION of reg with another reg or a number, the state of both registers remains unchanged



1366
1367
1368
# File 'lib/origen/registers/reg.rb', line 1366

def -(val)
  data - Reg.clean_value(val)
end

#/(val) ⇒ Object

Returns the DIVISION of reg with another reg or a number, the state of both registers remains unchanged



1372
1373
1374
# File 'lib/origen/registers/reg.rb', line 1372

def /(val)
  data / Reg.clean_value(val)
end

#add_bit(id, position, options = {}) ⇒ Object

Add a bit to the register, should only be called internally



960
961
962
963
964
965
966
967
968
969
970
# File 'lib/origen/registers/reg.rb', line 960

def add_bit(id, position, options = {}) # :nodoc:
  options = { data: @bits[position].data,  # If undefined preserve any data/reset value that has
              res:  @bits[position].data,   # already been applied at reg level
            }.merge(options)

  @lookup[id] = { pos: position, bits: 1, feature: options[:feature] }
  @bits.delete_at(position)    # Remove the initial bit from this position

  @bits.insert(position, Bit.new(self, position, options))
  self
end

#add_bits_from_options(options = {}) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.



504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
# File 'lib/origen/registers/reg.rb', line 504

def add_bits_from_options(options = {}) # :nodoc:
  # options is now an array for split bit groups or a hash if single bit/range bits
  # Now add the requested bits to the register, removing the unwritable bits as required
  options.each do |bit_id, bit_params|
    if bit_params.is_a? Hash
      description = bit_params.delete(:description)
      if description
        @description_from_api[bit_id] = description.split(/\r?\n/)
      end
      bind(bit_id, bit_params.delete(:bind)) if bit_params[:bind]
      position = bit_params[:pos] || 0
      num_bits = bit_params[:bits] || 1
      if @reset
        if @reset.is_a?(Symbol)
          bit_params[:res] = @reset
        else
          bit_params[:res] = @reset[(num_bits + position - 1), position]
        end
      end
      bit_params[:access] = @access if bit_params[:access].nil?
      bit_params[:res] = bit_params[:data] if bit_params[:data]
      bit_params[:res] = bit_params[:reset] if bit_params[:reset]
      if num_bits == 1
        add_bit(bit_id, position, bit_params)   # and add the new one
      else
        add_bus(bit_id, position, num_bits, bit_params)
      end
    elsif bit_params.is_a? Array

      description = bit_params.map { |h| h.delete(:description) }.compact.join("\n")
      unless description.empty?
        @description_from_api[bit_id] = description.split(/\r?\n/)
      end
      add_bus_scramble(bit_id, bit_params)
    end
  end
  self
end

#add_bus(id, position, size, options = {}) ⇒ Object

Add a bus to the register, should only be called internally



973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
# File 'lib/origen/registers/reg.rb', line 973

def add_bus(id, position, size, options = {}) # :nodoc:
  default_data = 0
  size.times do |n|
    default_data |= @bits[position + n].data << n
  end
  options = { data: default_data,  # If undefined preserve any data/reset value that has
              res:  default_data,   # already been applied at reg level
            }.merge(options)

  @lookup[id] = { pos: position, bits: size }
  size.times do |n|
    bit_options = options.dup
    bit_options[:data] = options[:data][n]
    if options[:res].is_a?(Symbol)
      bit_options[:res]  = options[:res]
    else
      bit_options[:res]  = options[:res][n]
    end
    @bits.delete_at(position + n)
    @bits.insert(position + n, Bit.new(self, position + n, bit_options))
  end
  self
end

#add_bus_scramble(id, array_of_hashes = []) ⇒ Object



997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
# File 'lib/origen/registers/reg.rb', line 997

def add_bus_scramble(id, array_of_hashes = [])
  array_of_hashes.each do |options|
    bind(id, options.delete(:bind)) if options[:bind]
    position = options[:pos] || 0
    num_bits = options[:bits] || 1
    size = options[:bits]
    options[:data] = options[:data] if options[:data]
    options[:res] = options[:reset] if options[:reset]
    default_data = 0
    size.times do |n|
      default_data |= @bits[position + n].data << n
    end
    options = { data: default_data,  # If undefined preserve any data/reset value that has
                res:  default_data,   # already been applied at reg level
              }.merge(options)

    @lookup[id] = [] if @lookup[id].nil?
    @lookup[id] = @lookup[id].push(pos: position, bits: size)
    size.times do |n|
      bit_options = options.dup
      bit_options[:data] = options[:data][n]
      bit_options[:res]  = options[:res][n]
      @bits.delete_at(position + n)
      @bits.insert(position + n, Bit.new(self, position + n, bit_options))
    end
    self
  end
end

#bind(bitname, live_parameter) ⇒ Object



126
127
128
129
130
131
132
# File 'lib/origen/registers/reg.rb', line 126

def bind(bitname, live_parameter)
  unless live_parameter.respond_to?(:is_a_live_parameter?) && live_parameter.is_a_live_parameter?
    fail 'Only live updating parameters should be bound, make sure you have not missed .live in the path to the parameter!'
  end
  @parameter_bound_bits ||= {}
  @parameter_bound_bits[bitname] = live_parameter
end

#bit(*args) ⇒ Object Also known as: bits, []

Returns the bit object(s) responding to the given name, wrapped in a BitCollection. This method also accepts multiple name possibilities, if neither bit exists in the register it will raise an error, otherwise it will return the first match. If no args passed in, it will return a BitCollection containing all bits. If a number is passed in then the bits from those positions are returned.

Example

add_reg :control, 0x55, :status => {:pos => 1, :bits => 2},
                        :fail   => {:pos => 0}

reg(:control).bit(:fail)              # => Returns a BitCollection containing the fail bit
reg(:control).bits(:status)           # => Returns a BifCollection containing the status bits
reg(:control).bit(:bist_fail, :fail)  # => Returns a BitCollection containing the fail bit
reg(:control).bit(0)                  # => Returns a BitCollection containing the fail bit
reg(:control).bit(1)                  # => Returns a BitCollection containing status bit
reg(:control).bit(1,2)                # => Returns a BitCollection containing both status bits


1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
# File 'lib/origen/registers/reg.rb', line 1066

def bit(*args)
  # allow msb0 bit numbering if requested
  wbo = :lsb0
  if args.last.is_a?(Hash)
    wbo = args.last.delete(:with_bit_order) || :lsb0
    args.pop if args.last.size == 0
  end

  multi_bit_names = false
  # return get_bits_with_constraint(nil,:default) if args.size == 0
  constraint = extract_feature_params(args)
  if constraint.nil?
    constraint = :default
  end

  collection = BitCollection.new(self, :unknown, [], with_bit_order: wbo)

  if args.size == 0
    collection.add_name(name)
    @bits.each do |bit|
      collection << get_bits_with_constraint(bit.position, constraint)
    end
  else
    args.flatten!
    args.sort!
    args.reverse! if wbo == :msb0
    args.each do |arg_item|
      if arg_item.is_a?(Integer)
        b = get_bits_with_constraint(arg_item, constraint, with_bit_order: wbo)
        collection << b if b
      elsif arg_item.is_a?(Range)
        expand_range(arg_item, wbo) do |bit_number|
          collection << get_bits_with_constraint(bit_number, constraint, with_bit_order: wbo)
        end
      else
        multi_bit_names = args.size > 1
        # Reaches here if bit name is specified
        if @lookup.include?(arg_item)
          split_bits = false
          @lookup.each { |_k, v| split_bits = true if v.is_a? Array }
          coll = get_lookup_feature_bits(arg_item, constraint, split_bits)
          if coll
            coll.each do |b|
              collection.add_name(arg_item)
              collection << b
            end
          end
        end
      end
    end
  end
  if collection.size == 0
    # Originally Origen returned nil when asking for a bit via an index which does not
    # exist, e.g. reg[1000] => nil
    # The args numeric clause here is to maintain that behavior
    if Origen.config.strict_errors && !args.all? { |arg| arg.is_a?(Numeric) }
      puts "Register #{@name} does not have a bits(s) named :#{args.join(', :')} or it might not be enabled."
      puts 'This could also be a typo, these are the valid bit names:'
      puts @lookup.keys
      fail 'Missing bits error!'
    end
    nil
  else
    if multi_bit_names
      collection.sort_by!(&:position)
      wbo == :msb0 ? collection.with_msb0 : collection.with_lsb0
    end
    wbo == :msb0 ? collection.with_msb0 : collection.with_lsb0
  end
end

#bit_orderObject

Returns the bit order attribute of the register (either :msb0 or :lsb0). If not explicitly defined on this register it will be inherited from the parent and will default to :lsb0 at the top-level



114
115
116
# File 'lib/origen/registers/reg.rb', line 114

def bit_order
  @bit_order ||= parent.respond_to?(:bit_order) ? parent.bit_order : :lsb0
end

#bit_value_descriptions(bitname, options = {}) ⇒ Object



387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
# File 'lib/origen/registers/reg.rb', line 387

def bit_value_descriptions(bitname, options = {})
  options = {
    format: :binary
  }.merge(options)
  base = case options[:format]
         when :bin, :binary
           2
         when :hex, :hexadecimal
           16
         when :dec, :decimal
           10
         else
           fail "Unknown integer format: #{options[:format]}"
         end
  desc = {}
  description(bitname).each do |line|
    if line =~ /^\s*(\d+)\s+\|\s+(.+)/
      desc[Regexp.last_match[1].to_i(base)] = Regexp.last_match[2]
    end
  end
  desc
end

#contains_bits?Boolean

Returns:

  • (Boolean)


499
500
501
# File 'lib/origen/registers/reg.rb', line 499

def contains_bits?
  true
end

#copy(reg) ⇒ Object

Copies data and overlays from one reg object to another, it does not copy read or store flags



1332
1333
1334
1335
1336
1337
1338
1339
# File 'lib/origen/registers/reg.rb', line 1332

def copy(reg)
  size.times do |i|
    source_bit = reg.bit[i]
    @bits[i].overlay(source_bit.overlay_str) if source_bit.has_overlay?
    @bits[i].write(source_bit.data)
  end
  self
end

#copy_data_from(reg) ⇒ Object

Copies data from one reg object to another

Example

reg(:data_copy).data                # => 0
reg(:data).write(0x1234)
reg(:data_copy).copy_data_from(reg(:data))
reg(:data_copy).data                # => 0x1234


1323
1324
1325
1326
1327
1328
# File 'lib/origen/registers/reg.rb', line 1323

def copy_data_from(reg)
  size.times do |i|
    @bits[i].write(reg.bit[i].data)
  end
  self
end

#copy_overlays_from(reg, options = {}) ⇒ Object

Copy overlays from one reg object to another

Example

reg(:data_copy).has_overlay?        # => false
reg(:data).overlay("data_val")
reg(:data_copy).copy_overlays_from(reg(:data))
reg(:data_copy).has_overlay?        # => true


1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
# File 'lib/origen/registers/reg.rb', line 1303

def copy_overlays_from(reg, options = {})
  size.times do |i|
    source_bit = reg.bit[i]
    if source_bit.has_overlay?
      ov = source_bit.overlay_str
      # If an id has been supplied make sure any trailing ID in the source is
      # changed to supplied identifier
      ov.gsub!(/_\d$/, "_#{options[:update_id]}") if options[:update_id]
      @bits[i].overlay(ov)
    end
  end
  self
end

#default_reg_metadataObject

Returns any application specific metadata that has been inherited by the given register. This does not account for any overridding that may have been applied to this register specifically however, use the meta method to get that.



382
383
384
385
# File 'lib/origen/registers/reg.rb', line 382

def 
  Origen::Registers..merge(
    Origen::Registers.[owner.class] || {})
end

#delete_bit(collection) ⇒ Object Also known as: delete_bits

Delete the bits in the collection from the register



1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
# File 'lib/origen/registers/reg.rb', line 1027

def delete_bit(collection)
  [collection.name].flatten.each do |name|
    @lookup.delete(name)
  end
  collection.each do |bit|
    @bits.delete_at(bit.position)    # Remove the bit
    @bits.insert(bit.position, Bit.new(self, bit.position, writable: @init_as_writable))
  end
  self
end

#description(bitname = :_reg, options = {}) ⇒ Object Also known as: descriptions

Returns the description of this register if any, if none then an empty array will be returned

*Note* Adding a description field will override any comment-driven documentation of a register (ie markdown style comments)



440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
# File 'lib/origen/registers/reg.rb', line 440

def description(bitname = :_reg, options = {})
  bitname, options = :_reg, bitname if bitname.is_a?(Hash)
  options = {
    include_name:       true,
    include_bit_values: true
  }.merge(options)
  if @description_from_api[bitname]
    desc = @description_from_api[bitname]
  else
    parse_descriptions unless description_lookup[define_file]
    begin
      desc = description_lookup[define_file][name][bitname] || []
    rescue
      desc = []
    end
  end
  desc = desc.reject do |line|
    if bitname != :_reg
      unless options[:include_bit_values]
        !!(line =~ /^\s*(\d+)\s+\|\s+(.+)/)
      end
    else
      false
    end
  end
  if desc.first
    unless options[:include_name]
      desc[0] = desc.first.sub(/\s*\*\*\s*#{escape_special_char(full_name(bitname))}\s*\*\*\s*-?\s*/, '')
    end
  end
  desc.shift while desc.first && desc.first.strip.empty?
  desc.pop while desc.last && desc.last.strip.empty?
  desc
end

#description_lookupObject

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns a hash containing all register descriptions that have been parsed so far.



374
375
376
# File 'lib/origen/registers/reg.rb', line 374

def description_lookup
  @@description_lookup ||= {}
end

#empty_bits(_options = {}) ⇒ Object

Returns an array of unoccupied bit positions

Example

reg :fstat, @base + 0x0000, :size => 8 do
  bit 7,  :ccif
  bit 6,  :rdcolerr
  bit 5,  :accerr
  bit 4,  :pviol
  bit 0,  :mgstat0
end
regs(:fstat).empty_bits
=> [1, 2, 3]

Example

reg :aguahb2, @base + 0x2A, :size => 8 do
  bit 5..2, :m0b_hbstrb, :reset => 0x0
  bit 1..0, :m0b_htrans, :reset => 0x2
end
regs(:aguahb2).empty_bits
=> [6, 7]


779
780
781
782
783
# File 'lib/origen/registers/reg.rb', line 779

def empty_bits(_options = {})
  array_span = (0..(size - 1)).to_a
  empty_bits = array_span - used_bits
  empty_bits
end

#empty_bits?(_options = {}) ⇒ Boolean

Returns true if any named_bits exist, false if used_bits is an empty array

Returns:

  • (Boolean)


786
787
788
# File 'lib/origen/registers/reg.rb', line 786

def empty_bits?(_options = {})
  empty_bits.size > 0
end

#enabled?Boolean

Query the owner heirarchy to see if this register is enabled

Returns:

  • (Boolean)


1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
# File 'lib/origen/registers/reg.rb', line 1432

def enabled?
  if feature
    value = false
    current_owner = self
    if feature.class == Array
      feature.each do |f|
        current_owner = self
        loop do
          if current_owner.respond_to?(:owner)
            current_owner = current_owner.owner
            if current_owner.respond_to?(:has_feature?)
              if current_owner.has_feature?(f)
                value = true
                break
              end
            end
          else # if current owner does not have a owner
            value = false
            break
          end
        end # loop end
        unless value
          if Origen.top_level && \
             Origen.top_level.respond_to?(:has_feature?) && \
             Origen.top_level.has_feature?(f)
            value = true
            unless value
              break
            end
          end
        end
        unless value
          break # break if feature not found and return false
        end
      end # iterated through all features in array
      return value
    else # if feature.class != Array
      loop do
        if current_owner.respond_to?(:owner)
          current_owner = current_owner.owner
          if current_owner.respond_to?(:has_feature?)
            if current_owner.has_feature?(feature)
              value = true
              break
            end
          end
        else # if current owner does not have a owner
          value = false
          break
        end
      end # loop end
      unless value
        if Origen.top_level && \
           Origen.top_level.respond_to?(:has_feature?) && \
           Origen.top_level.has_feature?(feature)
          value = true
        end
      end
      return value
    end
  else
    return true
  end
end

#enabled_by_feature?(name = nil) ⇒ Boolean Also known as: has_feature_constraint?

Returns true if the register is constrained by the given/any feature

Returns:

  • (Boolean)


1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
# File 'lib/origen/registers/reg.rb', line 1413

def enabled_by_feature?(name = nil)
  if !name
    !!feature
  else
    if feature.class == Array
      feature.each do |f|
        if f == name
          return true
        end
      end
      return false
    else
      return feature == name
    end
  end
end

#escape_special_char(str) ⇒ Object

Escapes brackets and parenthesis. Helper for description method.



431
432
433
# File 'lib/origen/registers/reg.rb', line 431

def escape_special_char(str)
  str.gsub('[', '\[').gsub(']', '\]').gsub('(', '\(').gsub(')', '\)') if str
end

#expand_range(range, wbo = :lsb0) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.



1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
# File 'lib/origen/registers/reg.rb', line 1040

def expand_range(range, wbo = :lsb0)
  if range.first > range.last
    range = Range.new(range.last, range.first)
  end
  range = range.to_a
  range.reverse! if wbo == :msb0
  range.each do |i|
    yield i
  end
end

#extract_feature_params(args) ⇒ Object



1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
# File 'lib/origen/registers/reg.rb', line 1249

def extract_feature_params(args)
  index = args.find_index { |arg| arg.class == Hash }
  if index
    params = args.delete_at(index)
  else
    params = nil
  end

  if params
    return params[:enabled_features] || params[:enabled_feature]
  else
    return nil
  end
end

#extract_meta_data(method, *args) ⇒ Object



1403
1404
1405
1406
1407
1408
1409
1410
# File 'lib/origen/registers/reg.rb', line 1403

def (method, *args)
  method = method.to_s.sub('?', '')
  if method =~ /=/
    instance_variable_set("@#{method.sub('=', '')}", args.first)
  else
    instance_variable_get("@#{method}") || meta[method.to_sym]
  end
end

#freezeObject



118
119
120
121
122
123
124
# File 'lib/origen/registers/reg.rb', line 118

def freeze
  bits.each(&:freeze)
  # Call any methods which cache results to generate the instance variables
  # before they are frozen
  address
  super
end

#full_name(bitname = :_reg, _options = {}) ⇒ Object

Returns the full name of the register when this has been specified in the register description like this:

# ** This is the Register Full Name **
# This register blah blah

This method will also be called by bit collections to look up the name when defined in a similar manner in the bit description.

If no name has been specified this will return nil.



420
421
422
423
424
425
426
427
428
# File 'lib/origen/registers/reg.rb', line 420

def full_name(bitname = :_reg, _options = {})
  bitname, options = :_reg, bitname if bitname.is_a?(Hash)
  desc = description(bitname).first
  # Capture something like this:
  # ** This is the full name ** - This bit blah blah
  if desc && desc =~ /\s*\*\*\s*([^\*.]*)\s*\*\*/
    Regexp.last_match[1].strip
  end
end

#get_bits_with_constraint(number, params, options = {}) ⇒ Object



1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
# File 'lib/origen/registers/reg.rb', line 1139

def get_bits_with_constraint(number, params, options = {})
  options = { with_bit_order: :lsb0 }.merge(options)
  # remap to lsb0 number to grab correct bit
  if options[:with_bit_order] == :msb0
    number = size - number - 1
  end

  return nil unless @bits[number]
  if (params == :default || !params) && @bits[number].enabled?
    @bits[number]
  elsif params == :none && !@bits[number].has_feature_constraint?
    @bits[number]
  elsif params == :all
    @bits[number]
  elsif params.class == Array
    params.each do |param|
      unless @bits[number].enabled_by_feature?(param)
        return nil
      end
      @bits[number]
    end
  elsif @bits[number].enabled_by_feature?(params)
    @bits[number]
  else
    return Bit.new(self, number, writable: false)
  end
end

#get_lookup_feature_bits(bit_name, params, split_group_reg) ⇒ Object



1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
# File 'lib/origen/registers/reg.rb', line 1167

def get_lookup_feature_bits(bit_name, params, split_group_reg)
  ##
  if split_group_reg == false # if this register has single bits and continuous ranges

    if @lookup.include?(bit_name)
      collection = BitCollection.new(self, bit_name)
      (@lookup[bit_name][:bits]).times do |i|
        collection << @bits[@lookup[bit_name][:pos] + i]
      end
      if !params || params == :default
        if collection.enabled?
          return collection
        end
      elsif params == :none
        unless collection.has_feature_constraint?
          return collection
        end
      elsif params == :all
        return collection
      elsif params.class == Array
        if params.all? { |param| collection.enabled_by_feature?(param) }
          return collection
        end
      else
        if collection.enabled_by_feature?(params)
          return collection
        end
      end
      return BitCollection.dummy(self, bit_name, size: collection.size, pos: @lookup[bit_name][:pos])
    else
      return []
    end

  elsif split_group_reg == true # if this registers has split bits in its range
    if @lookup.is_a?(Hash) # && @lookup.include?(bit_name)
      collection = false
      @lookup.each do |k, v|  # k is the bitname, v is the hash of bit data
        if k == bit_name
          collection ||= BitCollection.new(self, k)
          if v.is_a?(Array)
            v.reverse_each do |pb|  # loop each piece of bit group data
              (pb[:bits]).times do |i|
                collection << @bits[pb[:pos] + i]
              end
            end
          else
            (v[:bits]).times do |i|
              collection << @bits[v[:pos] + i]
            end
          end
        end
      end
      if !params || params == :default
        if collection.enabled?
          return collection
        end
      elsif params == :none
        unless collection.has_feature_constraint?
          return collection
        end
      elsif params == :all
        return collection
      elsif params.class == Array
        if params.all? { |param| collection.enabled_by_feature?(param) }
          return collection
        end
      else
        if collection.enabled_by_feature?(params)
          return collection
        end
      end
      if @lookup.is_a?(Hash) && @lookup[bit_name].is_a?(Array)
        return BitCollection.dummy(self, bit_name, size: collection.size, pos: @lookup[bit_name][0][:pos])
      else
        return BitCollection.dummy(self, bit_name, size: collection.size, pos: @lookup[bit_name[:pos]])
      end
    else
      return []
    end
  end
end

#has_bit?(name) ⇒ Boolean Also known as: has_bits?, has_bit, has_bits

Returns true if the register contains a bit(s) matching the given name

Example

add_reg :control, 0x55, :status => {:pos => 1}

reg(:control).has_bit?(:result)     # => false
reg(:control).has_bit?(:status)     # => true

Returns:

  • (Boolean)


952
953
954
# File 'lib/origen/registers/reg.rb', line 952

def has_bit?(name)
  @lookup.include?(name)
end

#has_bits_enabled_by_feature?(name = nil) ⇒ Boolean

Returns true if any of the bits within this register has feature associated with it.

Returns:

  • (Boolean)


1499
1500
1501
1502
1503
1504
1505
# File 'lib/origen/registers/reg.rb', line 1499

def has_bits_enabled_by_feature?(name = nil)
  if !name
    bits.any?(&:has_feature_constraint?)
  else
    bits.any? { |bit| bit.enabled_by_feature?(name) }
  end
end

#has_parameter_bound_bits?Boolean

Returns:

  • (Boolean)


134
135
136
# File 'lib/origen/registers/reg.rb', line 134

def has_parameter_bound_bits?
  @parameter_bound_bits && !@parameter_bound_bits.empty?
end

#initialize_copy(orig) ⇒ Object

This method is called whenever reg.clone is called to make a copy of a given register. Ruby will correctly copy all instance variables but it will not drill down to copy nested attributes, like the bits contained in @bits. This function will therefore correctly clone all bits contained in the register also.



547
548
549
550
551
552
553
554
# File 'lib/origen/registers/reg.rb', line 547

def initialize_copy(orig) # :nodoc:
  @bits = []
  orig.bits.each do |bit|
    @bits << bit.clone
  end
  @lookup = orig.lookup.clone
  self
end

#inspect(options = {}) ⇒ Object



150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
# File 'lib/origen/registers/reg.rb', line 150

def inspect(options = {})
  wbo = options[:with_bit_order] || :lsb0
  domsb0 = wbo == :msb0
  dolsb0 = !domsb0
  if wbo != bit_order
    Origen.log.warn "Register displayed with #{wbo} numbering, but defined with #{bit_order} numbering"
    Origen.log.warn 'Access (and display) this register with explicit numbering like this:'
    Origen.log.warn ''
    Origen.log.warn "   reg(:#{name}).with_msb0        # bit numbering scheme is msb0"
    Origen.log.warn "   reg(:#{name}).with_lsb0        # bit numbering scheme is lsb0 (default)"
    Origen.log.warn "   reg(:#{name})                  # bit numbering scheme is lsb0 (default)"
  end

  # This fancy_output option is passed in via option hash
  #  Even better, the output could auto-detect 7-bit vs 8-bit terminal output and adjust the parameter, but that's for another day
  fancy_output = options[:fancy_output].nil? ? true : options[:fancy_output]
  if fancy_output
    horiz_double_line = ''
    horiz_double_tee_down = ''
    horiz_double_tee_up = ''
    corner_double_up_left = ''
    corner_double_up_right = ''
    horiz_single_line = ''
    horiz_single_tee_down = ''
    horiz_single_tee_up = ''
    horiz_single_cross = ''
    horiz_double_cross = ''
    corner_single_down_left = ''
    corner_single_down_right = ''
    vert_single_line = ''
    vert_single_tee_left = ''
    vert_single_tee_right = ''
  else
    horiz_double_line = '='
    horiz_double_tee_down = '='
    horiz_double_tee_up = '='
    corner_double_up_left = '.'
    corner_double_up_right = '.'
    horiz_single_line = '-'
    horiz_single_tee_down = '-'
    horiz_single_tee_up = '-'
    horiz_single_cross = '+'
    horiz_double_cross = '='
    corner_single_down_left = '`'
    corner_single_down_right = '\''
    vert_single_line = '|'
    vert_single_tee_left = '<'
    vert_single_tee_right = '>'
  end
  bit_width = 13
  desc = ["\n0x%X - :#{name}" % address]
  r = size % 8
  if r == 0 # || (size > 8 && domsb0)
    desc << ('  ' + corner_double_up_left + ((horiz_double_line * bit_width + horiz_double_tee_down) * 8)).chop + corner_double_up_right
  else
    desc << ('  ' + (' ' * (bit_width + 1) * (8 - r)) + corner_double_up_left + ((horiz_double_line * bit_width + horiz_double_tee_down) * r)).chop + corner_double_up_right
  end

  # "<#{self.class}: #{self.name}>"
  num_bytes = (size / 8.0).ceil
  num_bytes.times do |byte_index|
    # Need to add support for little endian regs here?
    byte_number = num_bytes - byte_index
    max_bit = (byte_number * 8) - 1
    min_bit = max_bit - 8 + 1

    # BIT INDEX ROW
    line = '  '
    line_complete = false
    8.times do |i|
      bit_num = (byte_number * 8) - i - 1
      if bit_num > size - 1
        line << ' ' + ''.center(bit_width) unless line_complete
      else
        if dolsb0
          line << vert_single_line + "#{bit_num}".center(bit_width)
        else
          line << vert_single_line + "#{size - bit_num - 1}".center(bit_width)
        end
      end
    end
    line += vert_single_line unless line_complete
    desc << line

    # BIT NAME ROW
    line = '  '
    first_done = false
    line_complete = false
    named_bits include_spacers: true do |name, bit, bitcounter|
      if _bit_in_range?(bit, max_bit, min_bit)
        if max_bit > (size - 1) && !first_done
          (max_bit - (size - 1)).times do
            line << ' ' * (bit_width + 1)
          end
        end

        if bit.size > 1

          if name
            if bitcounter.nil?
              bit_name = "#{name}[#{_max_bit_in_range(bit, max_bit, min_bit, options)}:#{_min_bit_in_range(bit, max_bit, min_bit, options)}]"
              bit_span = _num_bits_in_range(bit, max_bit, min_bit)

            else
              upper = _max_bit_in_range(bit, max_bit, min_bit, options) + bitcounter - bit.size
              lower = _min_bit_in_range(bit, max_bit, min_bit, options) + bitcounter - bit.size
              if dolsb0
                bit_name = "#{name}[#{upper}:#{lower}]"
              else
                bit_name = "#{name}[#{upper}:#{lower}]"
              end
              bit_span = upper - lower + 1
            end
            width = (bit_width * bit_span) + bit_span - 1
            if bit_name.length > width
              line << vert_single_line + "#{bit_name[0..width - 2]}*"
            else
              line << vert_single_line + bit_name.center(width)
            end

          else
            bit.shift_out_left do |bit|
              if _index_in_range?(bit.position, max_bit, min_bit)
                line << vert_single_line + ''.center(bit_width)
              end
            end
          end

        else
          if name
            bit_name = "#{name}"
            if bit_name.length > bit_width
              txt = "#{bit_name[0..bit_width - 2]}*"
            else
              txt = bit_name
            end
          else
            txt = ''
          end
          line << vert_single_line + txt.center(bit_width)
        end
      end
      first_done = true
    end
    line += vert_single_line
    desc << line

    # BIT STATE ROW
    line = '  '
    first_done = false
    named_bits include_spacers: true do |name, bit, _bitcounter|
      if _bit_in_range?(bit, max_bit, min_bit)
        if max_bit > (size - 1) && !first_done
          (max_bit - (size - 1)).times do
            line << ' ' * (bit_width + 1)
          end
        end

        if bit.size > 1
          if name
            if bit.has_known_value?
              value = '0x%X' % bit.val[_max_bit_in_range(bit, max_bit, min_bit).._min_bit_in_range(bit, max_bit, min_bit)]
            else
              if bit.reset_val == :undefined
                value = 'X'
              else
                value = 'M'
              end
            end
            value += _state_desc(bit)
            bit_span = _num_bits_in_range(bit, max_bit, min_bit)
            width = bit_width * bit_span
            line << vert_single_line + value.center(width + bit_span - 1)
          else
            bit.shift_out_left do |bit|
              if _index_in_range?(bit.position, max_bit, min_bit)
                line << vert_single_line + ''.center(bit_width)
              end
            end
          end
        else
          if name
            if bit.has_known_value?
              val = bit.val
            else
              if bit.reset_val == :undefined
                val = 'X'
              else
                val = 'M'
              end
            end
            value = "#{val}" + _state_desc(bit)
            line << vert_single_line + value.center(bit_width)
          else
            line << vert_single_line + ''.center(bit_width)
          end
        end
      end
      first_done = true
    end
    line += vert_single_line
    desc << line

    if size >= 8
      r = size % 8
      if byte_index == 0 && r != 0
        desc << ('  ' + corner_double_up_left + ((horiz_double_line * bit_width + horiz_double_tee_down) * (8 - r)).chop + horiz_double_cross + (horiz_single_line * (bit_width + 1) * r)).chop + vert_single_tee_left
      else
        if byte_index == num_bytes - 1
          desc << ('  ' + corner_single_down_left + ((horiz_single_line * bit_width + horiz_single_tee_up) * 8)).chop + corner_single_down_right
        else
          desc << ('  ' + vert_single_tee_right + ((horiz_single_line * bit_width + horiz_single_cross) * 8)).chop + vert_single_tee_left
        end
      end
    else
      desc << ('  ' + (' ' * (bit_width + 1) * (8 - size)) + corner_single_down_left + ((horiz_single_line * bit_width + horiz_single_tee_up) * size)).chop + corner_single_down_right
    end
  end
  desc.join("\n")
end

#lookup_operation_handler(operation) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.



814
815
816
817
818
819
820
821
822
823
824
825
# File 'lib/origen/registers/reg.rb', line 814

def lookup_operation_handler(operation)
  # Could have made the controller be the owner when assigned above, but may have run
  # into problems with the reg meta data stuff
  reg_owner = owner.respond_to?(:controller) && owner.controller ? owner.controller : owner
  if reg_owner.respond_to?(operation)
    reg_owner
  elsif reg_owner.respond_to?(:owner) && reg_owner.owner.respond_to?(operation)
    reg_owner.owner
  elsif Origen.top_level && Origen.top_level.respond_to?(operation)
    Origen.top_level
  end
end

#meta_data_method?(method) ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:

  • (Boolean)


1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
# File 'lib/origen/registers/reg.rb', line 1390

def (method)
  attr_name = method.to_s.gsub(/\??=?/, '').to_sym
  if .key?(attr_name)
    if method.to_s =~ /\?/
      [true, false].include?([attr_name])
    else
      true
    end
  else
    false
  end
end

#named_bits(options = {}) ⇒ Object

Returns each named bit collection contained in the register,



568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
# File 'lib/origen/registers/reg.rb', line 568

def named_bits(options = {})
  options = {
    include_spacers: false
  }.merge(options)
  result = []

  # test if @lookup has any values stored as an array
  # if so it means there is a split group of bits
  # process that differently to a single bit or continuous range of bits
  # which are typically stored in a hash

  split_bits = false
  @lookup.each { |_k, v| split_bits = true if v.is_a? Array }

  if split_bits == false
    current_pos = size

    # Sort by position
    @lookup.sort_by { |_name, details| -details[:pos] }.each do |name, details|
      pos = details[:bits] + details[:pos]
      if options[:include_spacers] && (pos != current_pos)
        collection = BitCollection.dummy(self, nil, size: current_pos - pos, pos: pos)
        unless collection.size == 0
          if block_given?
            yield nil, collection
          else
            result << [nil, collection]
          end
        end
      end
      collection = BitCollection.new(self, name)
      details[:bits].times do |i|
        collection << @bits[details[:pos] + i]
      end
      unless collection.size == 0
        if block_given?
          yield name, collection
        else
          result << [name, collection]
        end
      end
      current_pos = details[:pos]
    end
    if options[:include_spacers] && (current_pos != 0)
      collection = BitCollection.dummy(self, nil, size: current_pos, pos: 0)
      unless collection.size == 0
        if block_given?
          yield nil, collection
        else
          result << [nil, collection]
        end
      end
    end
  elsif split_bits == true # if there are split bits, need to convert all register bit values to array elements to allow sorting

    # if the register has bits split up across it, then store the bits in order of decreasing reg position
    # but first, stuff all the bits in a simple array, as single bits, or ranges of bits

    @lookup_splits = []
    @lookup.each do |k, v|
      tempbit = {}
      bitcounter = {}
      if v.is_a? Hash
        # then this is already a single bit or a continuous range so just stuff it into the array
        tempbit[k] = v
        @lookup_splits << tempbit.clone
      elsif v.is_a? Array
        # if the bitgroup is split, then decompose into single bits and continuous ranges
        v.each_with_index do |bitdetail, _i|
          if bitcounter.key?(k)
            bitcounter[k] = bitcounter[k] + bitdetail[:bits]
          else
            bitcounter[k] = bitdetail[:bits]
          end
          tempbit[k] = bitdetail
          @lookup_splits << tempbit.clone
        end
      end
      if v.is_a? Array
        @lookup_splits.each_with_index do |_e, q|
          groupname = @lookup_splits[q].to_a[0][0]
          if groupname == k
            @lookup_splits[q][groupname][:bitgrouppos] = bitcounter[groupname] if groupname == k
            bitcounter[groupname] = bitcounter[groupname] - @lookup_splits[q][groupname][:bits]
          end
        end
      end
    end
    # Now sort the array in descending order
    # Does adding the bitgrouppos need to happen after the sort ?
    @lookup_splits = @lookup_splits.sort do |a, b|
      b.to_a[0][1][:pos] <=> a.to_a[0][1][:pos]
    end

    current_pos = size
    countbits = {} # if countbits.method == nil

    @master = {}
    bitgroup = {}
    bitinfo = {}
    info = {}

    @lookup_splits.each_with_index do |hash, _i|
      name = hash.to_a[0][0]
      details = hash.to_a[0][1]
      bitcounter = hash.to_a[0][1][:bitgrouppos]
      pos = details[:bits] + details[:pos]
      if options[:include_spacers] && (pos != current_pos)
        collection = BitCollection.dummy(self, nil, size: current_pos - pos, pos: pos)
        unless collection.size == 0
          if block_given?
            yield nil, collection, bitcounter
          else
            result << [nil, collection, bitcounter]
          end
        end
      end
      collection = BitCollection.new(self, name)
      details[:bits].times do |i|
        collection << @bits[details[:pos] + i]
      end
      unless collection.size == 0
        if block_given?
          yield name, collection, bitcounter
        else
          result << [name, collection, bitcounter]
        end
      end
      current_pos = details[:pos]
    end
    if options[:include_spacers] && current_pos != 0
      collection = BitCollection.dummy(self, nil, size: current_pos, pos: 0)
      unless collection.size == 0
        if block_given?
          yield nil, collection, bitcounter
        else
          result << [nil, collection, bitcounter]
        end
      end
    end
  end
  unless block_given?
    result
  end
end

#offsetObject

Returns the relative address of the given register, equivalent to calling reg.address(:relative => true)



829
830
831
# File 'lib/origen/registers/reg.rb', line 829

def offset
  address(relative: true)
end

#owned_by?(name) ⇒ Boolean

Returns true if the register owner matches the given name. A match will be detected if the class names of the register's owner contains the given name.

Alternatively if the register owner implements a method called reg_owner_alias then the value that this returns instead will also be considered when checking if the given name matches. This method can return an array of names if multiple aliases are required.

Aliases can be useful for de-coupling the commonly used name, e.g. “NVM” from the actual class name.

Examples:

class C90NVM
  include Origen::Registers

  def initialize
    add_reg :clkdiv, 0x3, 16, :div => {:bits => 8}
  end

end

reg = C90NVM.new.reg(:clkdiv)
reg.owned_by?(:ram)      # => false
reg.owned_by?(:nvm)      # => true
reg.owned_by?(:c90nvm)   # => true
reg.owned_by?(:c40nvm)   # => false
reg.owned_by?(:flash)    # => false

Using an alias

class C90NVM
  include Origen::Registers

  def initialize
    add_reg :clkdiv, 0x3, 16, :div => {:bits => 8}
  end

  def reg_owner_alias
    "flash"
  end

end

reg = C90NVM.new.reg(:clkdiv)
reg.owned_by?(:ram)      # => false
reg.owned_by?(:nvm)      # => true
reg.owned_by?(:c90nvm)   # => true
reg.owned_by?(:c40nvm)   # => false
reg.owned_by?(:flash)    # => true

Returns:

  • (Boolean)


934
935
936
937
938
939
940
941
942
943
944
# File 'lib/origen/registers/reg.rb', line 934

def owned_by?(name)
  !!(owner.class.to_s =~ /#{name}/i) || begin
    if owner.respond_to?(:reg_owner_alias)
      [owner.reg_owner_alias].flatten.any? do |al|
        al.to_s =~ /#{name}/i
      end
    else
      false
    end
  end
end

#parse_descriptionsObject

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.



477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
# File 'lib/origen/registers/reg.rb', line 477

def parse_descriptions
  desc = []
  File.readlines(define_file).each do |line|
    if line =~ /^\s*#(.*)/
      desc << Regexp.last_match[1].strip
    #              https://rubular.com/r/D8lg2P5kK1                     https://rubular.com/r/XP4ydPV8Fd
    elsif line =~ /^\s*reg\(?\s*[:"'](\w+)["']?\s*,.*\sdo/ || line =~ /^\s*.*add_reg\(?\s*[:"'](\w+)["']?\s*,.*/
      @current_reg_name = Regexp.last_match[1].to_sym
      description_lookup[define_file] ||= {}
      description_lookup[define_file][@current_reg_name] ||= {}
      description_lookup[define_file][@current_reg_name][:_reg] = desc.dup
      desc = []
    # https://www.rubular.com/r/7FidbC1JRA
    elsif @current_reg_name && line =~ /^\s*(add_bit|bit|reg\.bit)s?\(?\s*\d+\.?\.?\d*\s*,\s*:(\w+)/
      description_lookup[define_file][@current_reg_name][Regexp.last_match[2].to_sym] = desc.dup
      desc = []
    else
      desc = []
    end
  end
end

#readerObject

Returns the object that will be responsible for reading the given register



809
810
811
# File 'lib/origen/registers/reg.rb', line 809

def reader
  @reader ||= lookup_operation_handler(:read_register)
end

#request(operation, options = {}) ⇒ Object

Proxies requests from bit collections to the register owner



791
792
793
794
795
796
797
798
799
800
801
# File 'lib/origen/registers/reg.rb', line 791

def request(operation, options = {}) # :nodoc:
  if operation == :read_register
    object = reader
    (Origen.top_level || owner).read_register_missing!(self) unless object
  else
    object = writer
    (Origen.top_level || owner).write_register_missing!(self) unless object
  end
  object.send(operation, self, options)
  self
end

#respond_to?(*args) ⇒ Boolean

Recognize that Reg responds to all BitCollection methods methods based on application-specific meta data properties

Returns:

  • (Boolean)


1292
1293
1294
1295
# File 'lib/origen/registers/reg.rb', line 1292

def respond_to?(*args) # :nodoc:
  sym = args.first.to_sym
  (sym) || has_bits?(sym) || super(sym) || BitCollection.instance_methods.include?(sym)
end

#reverse_named_bits(_options = {}) ⇒ Object

Returns each named bit collection contained in self



715
716
717
718
719
720
721
# File 'lib/origen/registers/reg.rb', line 715

def reverse_named_bits(_options = {})
  bits = []
  named_bits { |name, bit| bits << [name, bit] }
  bits.each do |bit|
    yield bit[0], bit[1]
  end
end

#to_bit_collection(options = {}) ⇒ Object



1286
1287
1288
# File 'lib/origen/registers/reg.rb', line 1286

def to_bit_collection(options = {})
  BitCollection.new(self, name, @bits, options)
end

#to_json(*args) ⇒ Object



1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
# File 'lib/origen/registers/reg.rb', line 1507

def to_json(*args)
  JSON.pretty_generate({
                         name:        name,
                         full_name:   full_name,
                         address:     address,
                         offset:      offset,
                         size:        size,
                         path:        path,
                         reset_value: reset_value,
                         description: description(include_name: false, include_bit_values: false),
                         bits:        named_bits.map do |name, bit|
                           {
                             name:        name,
                             full_name:   bit.full_name,
                             position:    bit.position,
                             size:        bit.size,
                             reset_value: bit.reset_value,
                             access:      bit.access,
                             description: bit.description(include_name: false, include_bit_values: false),
                             bit_values:  bit.bit_value_descriptions.map do |val, desc|
                               {
                                 value:       val,
                                 description: desc
                               }
                             end
                           }
                         end
                       }, *args)
end

#update_bound_bitsObject



138
139
140
141
142
143
144
# File 'lib/origen/registers/reg.rb', line 138

def update_bound_bits
  @updating_bound_bits = true
  @parameter_bound_bits.each do |name, val|
    bits(name).write(val)
  end
  @updating_bound_bits = false
end

#updating_bound_bits?Boolean

Returns:

  • (Boolean)


146
147
148
# File 'lib/origen/registers/reg.rb', line 146

def updating_bound_bits?
  @updating_bound_bits
end

#used_bits(_options = {}) ⇒ Object

Returns an array of occupied bit positions

Example

reg :fstat, @base + 0x0000, :size => 8 do
  bit 7,  :ccif
  bit 6,  :rdcolerr
  bit 5,  :accerr
  bit 4,  :pviol
  bit 0,  :mgstat0
end
regs(:fstat).used_bits
=> [0, 4, 5, 6, 7]

Example

reg :aguahb2, @base + 0x2A, :size => 8 do
  bit 5..2, :m0b_hbstrb, :reset => 0x0
  bit 1..0, :m0b_htrans, :reset => 0x2
end
regs(:aguahb2).used_bits
=> [0, 1, 2, 3, 4, 5]


742
743
744
745
746
747
748
749
750
751
752
753
# File 'lib/origen/registers/reg.rb', line 742

def used_bits(_options = {})
  used_bits = []
  named_bits do |_name, bit|
    used_bits << bit.position if bit.size == 1
    if bit.size > 1
      used_bits << ((bit.position)..(bit.position + bit.size - 1)).to_a
    end
  end
  used_bits.flatten!
  used_bits.sort!
  used_bits
end

#used_bits?(_options = {}) ⇒ Boolean

Returns true if any named_bits exist, false if used_bits is an empty array

Returns:

  • (Boolean)


756
757
758
# File 'lib/origen/registers/reg.rb', line 756

def used_bits?(_options = {})
  used_bits.size > 0
end

#with_lsb0Object



107
108
109
# File 'lib/origen/registers/reg.rb', line 107

def with_lsb0
  self
end

#with_msb0Object



103
104
105
# File 'lib/origen/registers/reg.rb', line 103

def with_msb0
  @msb0_delegator
end

#writerObject

Returns the object that will be responsible for writing the given register



804
805
806
# File 'lib/origen/registers/reg.rb', line 804

def writer
  @writer ||= lookup_operation_handler(:write_register)
end

#|(val) ⇒ Object

Returns the BITWISE OR of reg with another reg or a number, the state of both registers remains unchanged



1354
1355
1356
# File 'lib/origen/registers/reg.rb', line 1354

def |(val)
  data | Reg.clean_value(val)
end