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DCPS3

Debug Change PE State to EL3.

Syntax

DCPS3 {#imm}

Where:

imm
Is an optional 16-bit unsigned immediate, in the range 0 to 65535, defaulting to 0.

Usage

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:

  • ELR_EL3 becomes unknown.
  • SPSR_EL3 becomes unknown.
  • ESR_EL3 becomes unknown.
  • DLR_EL0 and DSPSR_EL0 become unknown.
  • The endianness is set according to SCTLR_EL3.EE.

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 in the Arm® Architecture Reference Manual Arm®v8, for Arm®v8‑A architecture profile.

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