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Debug Change PE State to EL3, when executed in Debug state:

  • If executed at EL3 selects SP_EL3.
  • Otherwise, changes the current Exception level and SP to EL3 using SP_EL3.

The target exception level of a DCPS3 instruction is EL3.

On executing a DCPS3 instruction:

This instruction is undefined at all exception levels if either:

  • EDSCR.SDD == 1.
  • EL3 is not implemented.

This instruction is always undefined in Non-debug state.

For more information on the operation of the DCPSn instructions, see DCPS.


DCPS3 {#<imm>}

if !Halted() then UNDEFINED;

Assembler Symbols


Is an optional 16-bit unsigned immediate, in the range 0 to 65535, defaulting to 0 and encoded in the "imm16" field.