DC CGDVADP, Clean of Data and Allocation Tags by VA to PoDP
The DC CGDVADP characteristics are:
Purpose
Clean Allocation Tags and data in data cache by address to Point of Deep Persistence.
If the memory system does not identify a Point of Deep Persistence, then this instruction behaves as a DC CGDVAP.
Configuration
This instruction is present only when FEAT_DPB2 is implemented and FEAT_MTE is implemented. Otherwise, direct accesses to DC CGDVADP are UNDEFINED.
Attributes
DC CGDVADP is a 64-bit System instruction.
Field descriptions
The DC CGDVADP input value bit assignments are:
| 63 | 62 | 61 | 60 | 59 | 58 | 57 | 56 | 55 | 54 | 53 | 52 | 51 | 50 | 49 | 48 | 47 | 46 | 45 | 44 | 43 | 42 | 41 | 40 | 39 | 38 | 37 | 36 | 35 | 34 | 33 | 32 |
| Virtual address to use | |||||||||||||||||||||||||||||||
| Virtual address to use | |||||||||||||||||||||||||||||||
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
Bits [63:0]
Virtual address to use. No alignment restrictions apply to this VA.
Executing the DC CGDVADP instruction
If EL0 access is enabled, when executed at EL0, this instruction requires read access permission to the VA, otherwise it generates a Permission Fault, see 'Permission fault'.
Execution of this instruction might require an address translation from VA to PA, and that translation might fault. For more information, see 'The data cache maintenance instruction (DC)'.
Accesses to this instruction use the following encodings:
DC CGDVADP, <Xt>
| op0 | op1 | CRn | CRm | op2 |
|---|---|---|---|---|
| 0b01 | 0b011 | 0b0111 | 0b1101 | 0b101 |
if PSTATE.EL == EL0 then
if !(EL2Enabled() && HCR_EL2.<E2H,TGE> == '11') && SCTLR_EL1.UCI == '0' then
if EL2Enabled() && HCR_EL2.TGE == '1' then
AArch64.SystemAccessTrap(EL2, 0x18);
else
AArch64.SystemAccessTrap(EL1, 0x18);
elsif EL2Enabled() && HCR_EL2.<E2H,TGE> != '11' && HCR_EL2.TPCP == '1' then
AArch64.SystemAccessTrap(EL2, 0x18);
elsif EL2Enabled() && HCR_EL2.<E2H,TGE> != '11' && (!HaveEL(EL3) || SCR_EL3.FGTEn == '1') && HFGITR_EL2.DCCVADP == '1' then
AArch64.SystemAccessTrap(EL2, 0x18);
elsif EL2Enabled() && HCR_EL2.<E2H,TGE> == '11' && SCTLR_EL2.UCI == '0' then
AArch64.SystemAccessTrap(EL2, 0x18);
else
DC_CGDVADP(X[t]);
elsif PSTATE.EL == EL1 then
if EL2Enabled() && HCR_EL2.TPCP == '1' then
AArch64.SystemAccessTrap(EL2, 0x18);
elsif EL2Enabled() && (!HaveEL(EL3) || SCR_EL3.FGTEn == '1') && HFGITR_EL2.DCCVADP == '1' then
AArch64.SystemAccessTrap(EL2, 0x18);
else
DC_CGDVADP(X[t]);
elsif PSTATE.EL == EL2 then
DC_CGDVADP(X[t]);
elsif PSTATE.EL == EL3 then
DC_CGDVADP(X[t]);