dcps1

Debug Change PE State to EL1

DCPS1 {#<imm>}

Switch to Exception Level 1 (Debug).

Pseudocode Operation

SPSR_EL1 ← PSTATE
PSTATE.EL ← '01'
PC ← DLR_EL0

Example

DCPS1

Encoding

Binary Layout

11010100

31:24

101

23:21

imm16

20:5

000

4:2

01

1:0

 

Format Exception

Opcode 0xD4A00001

Extension System

Operands

• imm
  ID

Related

Other forms of dcps1

• dcps1 Debug Change PE State to EL1 (A32)

More in System

Reference

View in Arm A64 ISA Reference ↗ Arm A64 ISA

Instruction Forms

Encoding	Instruction		ISA		Bit pattern
0xD4A00001	DCPS1 {#<imm>}		A64		11010100 | 101 | imm16 | 000 | 01

Description

Debug Change PE State to EL1, when executed in Debug state: The target exception level of a DCPS1 instruction is: When the target Exception level of a DCPS1 instruction is ELx, on executing this instruction: This instruction is UNDEFINED at EL0 in Non-secure state if EL2 is implemented and HCR_EL2.TGE == 1. This instruction is always UNDEFINED in Non-debug state. For more information on the operation of the DCPS<n> instructions, see DCPS.

Operation

if !Halted() then UNDEFINED;
DCPSInstruction(LL);