TRCVMIDCVR<n>, Virtual Context Identifier Comparator Value Register <n>, n = 0 - 7

The TRCVMIDCVR<n> characteristics are:

Purpose

Contains the Virtual Context Identifier Comparator value.

Configuration

AArch64 System register TRCVMIDCVR<n> bits [63:0] are architecturally mapped to External register TRCVMIDCVR<n>[63:0].

This register is present only when FEAT_ETE is implemented and TRCIDR4.NUMVMIDC > n. Otherwise, direct accesses to TRCVMIDCVR<n> are UNDEFINED.

Attributes

TRCVMIDCVR<n> is a 64-bit register.

Field descriptions

6362616059585756555453525150494847464544434241403938373635343332
313029282726252423222120191817161514131211109876543210
VALUE
VALUE

VALUE, bits [63:0]

Virtual context identifier value. The width of this field is indicated by TRCIDR2.VMIDSIZE. Unimplemented bits are RES0. After a PE Reset, the trace unit assumes that the Virtual context identifier is zero until the PE updates the Virtual context identifier .

The reset behaviour of this field is:

Accessing TRCVMIDCVR<n>

Must be programmed if any of the following are true:

Accesses to this register use the following encodings in the System register encoding space:

MRS <Xt>, TRCVMIDCVR<n>

op0op1CRnCRmop2
0b100b0010b0011n[2:0]:0b00b001

if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if Halted() && HaveEL(EL3) && EDSCR.SDD == '1' && boolean IMPLEMENTATION_DEFINED "EL3 trap priority when SDD == '1'" && CPTR_EL3.TTA == '1' then UNDEFINED; elsif CPACR_EL1.TTA == '1' then AArch64.SystemAccessTrap(EL1, 0x18); elsif EL2Enabled() && CPTR_EL2.TTA == '1' then AArch64.SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && (!HaveEL(EL3) || SCR_EL3.FGTEn == '1') && HDFGRTR_EL2.TRC == '1' then AArch64.SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && CPTR_EL3.TTA == '1' then if Halted() && EDSCR.SDD == '1' then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); else return TRCVMIDCVR[UInt(CRm<3:1>)]; elsif PSTATE.EL == EL2 then if Halted() && HaveEL(EL3) && EDSCR.SDD == '1' && boolean IMPLEMENTATION_DEFINED "EL3 trap priority when SDD == '1'" && CPTR_EL3.TTA == '1' then UNDEFINED; elsif CPTR_EL2.TTA == '1' then AArch64.SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && CPTR_EL3.TTA == '1' then if Halted() && EDSCR.SDD == '1' then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); else return TRCVMIDCVR[UInt(CRm<3:1>)]; elsif PSTATE.EL == EL3 then if CPTR_EL3.TTA == '1' then AArch64.SystemAccessTrap(EL3, 0x18); else return TRCVMIDCVR[UInt(CRm<3:1>)];

MSR TRCVMIDCVR<n>, <Xt>

op0op1CRnCRmop2
0b100b0010b0011n[2:0]:0b00b001

if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if Halted() && HaveEL(EL3) && EDSCR.SDD == '1' && boolean IMPLEMENTATION_DEFINED "EL3 trap priority when SDD == '1'" && CPTR_EL3.TTA == '1' then UNDEFINED; elsif CPACR_EL1.TTA == '1' then AArch64.SystemAccessTrap(EL1, 0x18); elsif EL2Enabled() && CPTR_EL2.TTA == '1' then AArch64.SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && (!HaveEL(EL3) || SCR_EL3.FGTEn == '1') && HDFGWTR_EL2.TRC == '1' then AArch64.SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && CPTR_EL3.TTA == '1' then if Halted() && EDSCR.SDD == '1' then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); else TRCVMIDCVR[UInt(CRm<3:1>)] = X[t]; elsif PSTATE.EL == EL2 then if Halted() && HaveEL(EL3) && EDSCR.SDD == '1' && boolean IMPLEMENTATION_DEFINED "EL3 trap priority when SDD == '1'" && CPTR_EL3.TTA == '1' then UNDEFINED; elsif CPTR_EL2.TTA == '1' then AArch64.SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && CPTR_EL3.TTA == '1' then if Halted() && EDSCR.SDD == '1' then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); else TRCVMIDCVR[UInt(CRm<3:1>)] = X[t]; elsif PSTATE.EL == EL3 then if CPTR_EL3.TTA == '1' then AArch64.SystemAccessTrap(EL3, 0x18); else TRCVMIDCVR[UInt(CRm<3:1>)] = X[t];


30/06/2021 09:39; 4f5dd962f4e34e1ac282f76da4d6e7fc4cab087e

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