litex/doc/source/_themes/enjoydigital_sphinx_rtd_theme/breadcrumbs.html

<div role="navigation" aria-label="breadcrumbs navigation">

  <div class="breadcrumb-box">
     <a class="breadcrumb-box-item" href="{{ pathto(master_doc) }}">Home</a> 
      {% for doc in parents %}
          <a class="breadcrumb-box-item" href="{{ doc.link|e }}">&raquo;&nbsp;{{ doc.title }}</a>
      {% endfor %}
    <div class="breadcrumb-box-item">&raquo;&nbsp;{{ title }}</div>
  </div>
 
</div>