Module: Origen::Memory

Defined in:
lib/origen/memory.rb

Instance Method Summary collapse

Instance Method Details

#memory(address, options = {}) ⇒ Object Also known as: mem 



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# File 'lib/origen/memory.rb', line 3

def memory(address, options = {})
  if is_top_level?
    r = "mem_#{address.to_s(16)}".to_sym
    unless has_reg?(r)
      if memory_address_aligned?(address)
        add_reg r, address, size: memory_width
      end
    end
    send(r)
  else
    Origen.top_level.memory(address + base_address, options)
  end
end

#memory_address_aligned?(address) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/origen/memory.rb', line 18

def memory_address_aligned?(address)
  b = (memory_width / 8) - 1
  unless address & b == 0
    s = b - 1
    aligned = (address >> s) << s
    fail "Address #{address.to_hex} is not aligned to the memory width, it should be #{aligned.to_hex}"
  end
  true
end

#memory_width ⇒ Object 



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# File 'lib/origen/memory.rb', line 28

def memory_width
  if is_top_level?
    @memory_width ||= 32
  else
    Origen.top_level.memory_width
  end
end

#memory_width=(size) ⇒ Object 



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# File 'lib/origen/memory.rb', line 36

def memory_width=(size)
  if is_top_level?
    unless size % 8 == 0
      fail 'Memory width must be a multiple of 8'
    end
    if @memory_width
      fail 'The memory width cannot be changed after a memory location has been referenced'
    end

    @memory_width = size
  else
    Origen.top_level.memory_width = size
  end
end