<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE register_page SYSTEM "registers.dtd">
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<register_page>
  <registers>
  
    <register is_register="True" is_internal="False" is_stub_entry="False">
      <reg_short_name>EDITR</reg_short_name>
        
        <reg_long_name>External Debug Instruction Transfer Register</reg_long_name>

        <power_domain_text>EDITR is in the Core power domain</power_domain_text>


      
      

    
  <reg_address
      external_access="True"
    mem_map_access="True"
      power_domain="None"
  >
    <reg_component>Debug</reg_component>
    <reg_offset><hexnumber>0x084</hexnumber></reg_offset>
    <reg_instance>EDITR</reg_instance>
    <reg_access>
      
        
      <reg_access_state>
          <reg_access_level>When DoubleLockStatus(), or !IsCorePowered(), or OSLockStatus()</reg_access_level>
          <reg_access_type>ERROR</reg_access_type>
      </reg_access_state>
        
      <reg_access_state>
          <reg_access_level>When SoftwareLockStatus(addrdesc)</reg_access_level>
          <reg_access_type>WI</reg_access_type>
      </reg_access_state>
        
      <reg_access_state>
          <reg_access_type>WO</reg_access_type>
      </reg_access_state>
    </reg_access>
</reg_address>



          <reg_reset_value></reg_reset_value>

      <reg_mappings>
        




      </reg_mappings>

        <reg_purpose>
          
    
      <purpose_text>
        <para>Used in Debug state for passing instructions to the PE for execution.</para>
      </purpose_text>

        </reg_purpose>

      <reg_groups>
          <reg_group>Debug</reg_group>
      </reg_groups>
      
      
        
      <reg_attributes>
          
    
      <attributes_text>
        <para>EDITR is a 32-bit register.</para>
      </attributes_text>

      </reg_attributes>
      <reg_fieldsets>
        






<fields id="fieldset_0" length="32">
  <fields_condition>When FEAT_AA32 is implemented and UsingAArch32()</fields_condition>
  <fields_instance>in AArch32 state</fields_instance>
  <text_before_fields/>
  <field id="fieldset_0-31_16" has_partial_fieldset="False" is_linked_to_partial_fieldset="False" is_access_restriction_possible="False" is_variable_length="False" is_constant_value="False" is_partial_field="False" is_conditional_field_name="False">
    <field_name>hw2</field_name>
    <field_msb>31</field_msb>
    <field_lsb>16</field_lsb>
    <rel_range>31:16</rel_range>
    <field_description order="before"><para>Second halfword of the T32 instruction to be executed on the PE. When EDITR contains a 16-bit T32 instruction, this field is ignored. For more information, see <xref linkend="#BABGECFE">'Behavior in Debug state'</xref>.</para>
<note><para>The hw2 field is displayed on the left. This is not the usual convention for display of T32 instruction halfwords.</para></note></field_description>
  </field>
  <field id="fieldset_0-15_0" has_partial_fieldset="False" is_linked_to_partial_fieldset="False" is_access_restriction_possible="False" is_variable_length="False" is_constant_value="False" is_partial_field="False" is_conditional_field_name="False">
    <field_name>hw1</field_name>
    <field_msb>15</field_msb>
    <field_lsb>0</field_lsb>
    <rel_range>15:0</rel_range>
    <field_description order="before"><para>First halfword of the T32 instruction to be executed on the PE.</para>
<note><para>The hw1 field is displayed on the right. This is not the usual convention for display of T32 instruction halfwords.</para></note></field_description>
  </field>
  <text_after_fields/>
</fields>



<fields id="fieldset_1" length="32">
  <fields_condition>When FEAT_AA64 is implemented and !UsingAArch32()</fields_condition>
  <fields_instance>in AArch64 state</fields_instance>
  <text_before_fields/>
  <field id="fieldset_1-31_0" has_partial_fieldset="False" is_linked_to_partial_fieldset="False" is_access_restriction_possible="False" is_variable_length="False" is_constant_value="False" is_partial_field="False" is_conditional_field_name="False">
    <field_name>A64_Instruction</field_name>
    <field_shortdesc>A64 instruction to be executed on the PE</field_shortdesc>
    <field_msb>31</field_msb>
    <field_lsb>0</field_lsb>
    <rel_range>31:0</rel_range>
    <field_description order="before">
      <para>A64 instruction to be executed on the PE.</para>
    </field_description>
  </field>
  <text_after_fields/>
</fields>





<reg_fieldset length="32">
  <fields_condition>When FEAT_AA32 is implemented and UsingAArch32()</fields_condition>
  <fieldat id="fieldset_0-31_16" msb="31" lsb="16"/>
  <fieldat id="fieldset_0-15_0" msb="15" lsb="0"/>
</reg_fieldset>

<reg_fieldset length="32">
  <fields_condition>When FEAT_AA64 is implemented and !UsingAArch32()</fields_condition>
  <fieldat id="fieldset_1-31_0" msb="31" lsb="0"/>
</reg_fieldset>


      </reg_fieldsets>

      <access_mechanisms>
          


  
    
      <access_permission_text>
        <para>If <register_link state="ext" id="ext-edscr.xml">EDSCR</register_link>.ITE == 0 when the PE exits Debug state on receiving a Restart request trigger event, the behavior of any instruction issued through the ITR in Normal access mode that has not completed execution is <arm-defined-word>CONSTRAINED UNPREDICTABLE</arm-defined-word>, and must do one of the following:</para>

      </access_permission_text>
      <access_permission_text>
        <list type="unordered">
<listitem><content>It must complete execution in Debug state before the PE executes the restart sequence.</content>
</listitem><listitem><content>It must complete execution in Non-debug state before the PE executes the restart sequence.</content>
</listitem><listitem><content>It must be abandoned. This means that the instruction does not execute. Any registers or memory accessed by the instruction are left in an <arm-defined-word>UNKNOWN</arm-defined-word> state.</content>
</listitem></list>

      </access_permission_text>
      <access_permission_text>
        <para>EDITR ignores writes if the PE is in Non-debug state.</para>
      </access_permission_text>





    

      </access_mechanisms>

      <arch_variants>
      </arch_variants>
  </register>
</registers>
<timestamp>2026-03-26 20:27:25</timestamp>
<commit_id>2026-03_rel</commit_id>
</register_page>