This is a collection of Intel®’ IA32® Software Developer's Manuals (URL of the day) and AMD' AMD64 Architecture Programmer's Manual together with the related specifications, application notes, white papers, and change logs. The collection aims to keep all available revisions. It was originally created by Michal Necasek, see OS/2 Museum.

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DCPS3

Debug Change PE State to EL3 allows the debugger to move the PE into EL3 from a lower Exception level or to a specific mode at the current Exception level.

DCPS3 is UNDEFINED if any of:

• The PE is in Non-debug state.
• EL3 is not implemented.
• EDSCR.SDD is set to 1.

When the PE executes DCPS3:

• If EL3 is using AArch32, the PE enters Monitor mode and LR_mon, SPSR_mon, DLR and DSPSR become UNKNOWN. If DCPS3 is executed in Monitor mode, SCR.NS is cleared to 0.
• If EL3 is using AArch64, the PE enters EL3 using AArch64, selects SP_EL3, and ELR_EL3, ESR_EL3, SPSR_EL3, DLR_EL0 and DSPSR_EL0 become UNKNOWN.

For more information on the operation of the DCPS<n> instructions, see DCPS.

T1

Decode for this encoding

if !HaveEL(EL3) then Undefined(); end;