Trace Single-shot Processing Element Comparator Input Control Register <n>
Returns the status of the corresponding Single-shot Comparator Control.
AArch64 System register TRCSSPCICR<n> bits [31:0] are architecturally mapped to External register TRCSSPCICR<n>[31:0].
This register is present only when FEAT_ETE is implemented, System register access to the trace unit registers is implemented, and UInt(TRCIDR4.NUMPC) > 0. Otherwise, direct accesses to TRCSSPCICR<n> are UNDEFINED.
TRCSSPCICR<n> is a 64-bit register.
| 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 |
| 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 |
| RES0 | |||||||||||||||||||||||||||||||
| RES0 | PC[7] | PC[6] | PC[5] | PC[4] | PC[3] | PC[2] | PC[1] | PC[0] | |||||||||||||||||||||||
Reserved, RES0.
Selects one or more PE Comparator Inputs for Single-shot control.
| PC[<m>] | Meaning |
|---|---|
| 0b0 |
The single PE Comparator Input <m>, is not selected as for Single-shot control. |
| 0b1 |
The single PE Comparator Input <m>, is selected as for Single-shot control. |
This bit is RES0 if m >= TRCIDR4.NUMPC.
The reset behavior of this field is:
Accessing this field has the following behavior:
Must be programmed if implemented and any TRCRSCTLR<a>.GROUP == 0b0011 and TRCRSCTLR<a>.SINGLE_SHOT[n] == 1.
If the trace unit is not in the Idle state it is CONSTRAINED UNPREDICTABLE whether writes to this register are ignored.
Reads from this register might return an UNKNOWN value if the trace unit is not in either of the Idle or Stable states.
Accesses to this register use the following encodings in the System register encoding space:
MRS <Xt>, TRCSSPCICR<m> ; Where m = 0-7
(op0 = 0b10, op1 = 0b001, CRn = 0b0001, CRm = 0b0:m[2:0], op2 = 0b011)
let m:integer = UInt(CRm[2:0]); if !(IsFeatureImplemented(FEAT_ETE) && IsFeatureImplemented(FEAT_TRC_SR) && UInt(TRCIDR4().NUMPC) > 0) then Undefined(); elsif m >= NUM_TRACE_SINGLE_SHOT_COMPARATOR_CONTROLS then Undefined(); elsif HaveEL(EL3) && !(EffectivelyAtEL0InHost() || EffectivelyAtEL0NotInHost() || PSTATE.EL == EL3) && EL3SDDUndefPriority() && CPTR_EL3().TTA == '1' then Undefined(); elsif PSTATE.EL == EL0 then Undefined(); elsif PSTATE.EL == EL1 then if CPACR_EL1().TTA == '1' then AArch64_SystemAccessTrap(EL1, 0x18); elsif EL2Enabled() && CPTR_EL2().TTA == '1' then AArch64_SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && IsFeatureImplemented(FEAT_FGT) && (!HaveEL(EL3) || SCR_EL3().FGTEn == '1') && HDFGRTR_EL2().TRC == '1' then AArch64_SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && CPTR_EL3().TTA == '1' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; elsif IsFeatureImplemented(FEAT_TRBE_EXT) && OSLSR_EL1().OSLK == '0' && HaltingAllowed() && EDSCR2().TTA == '1' then Halt(DebugHalt_SoftwareAccess); else X{64}(t) = TRCSSPCICR(m); end; elsif PSTATE.EL == EL2 then if CPTR_EL2().TTA == '1' then AArch64_SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && CPTR_EL3().TTA == '1' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; elsif IsFeatureImplemented(FEAT_TRBE_EXT) && OSLSR_EL1().OSLK == '0' && HaltingAllowed() && EDSCR2().TTA == '1' then Halt(DebugHalt_SoftwareAccess); else X{64}(t) = TRCSSPCICR(m); end; elsif PSTATE.EL == EL3 then if CPTR_EL3().TTA == '1' then AArch64_SystemAccessTrap(EL3, 0x18); elsif IsFeatureImplemented(FEAT_TRBE_EXT) && OSLSR_EL1().OSLK == '0' && HaltingAllowed() && EDSCR2().TTA == '1' then Halt(DebugHalt_SoftwareAccess); else X{64}(t) = TRCSSPCICR(m); end; end;
MSR TRCSSPCICR<m>, <Xt> ; Where m = 0-7
(op0 = 0b10, op1 = 0b001, CRn = 0b0001, CRm = 0b0:m[2:0], op2 = 0b011)
let m:integer = UInt(CRm[2:0]); if !(IsFeatureImplemented(FEAT_ETE) && IsFeatureImplemented(FEAT_TRC_SR) && UInt(TRCIDR4().NUMPC) > 0) then Undefined(); elsif m >= NUM_TRACE_SINGLE_SHOT_COMPARATOR_CONTROLS then Undefined(); elsif HaveEL(EL3) && !(EffectivelyAtEL0InHost() || EffectivelyAtEL0NotInHost() || PSTATE.EL == EL3) && EL3SDDUndefPriority() && CPTR_EL3().TTA == '1' then Undefined(); elsif PSTATE.EL == EL0 then Undefined(); elsif PSTATE.EL == EL1 then if CPACR_EL1().TTA == '1' then AArch64_SystemAccessTrap(EL1, 0x18); elsif EL2Enabled() && CPTR_EL2().TTA == '1' then AArch64_SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && IsFeatureImplemented(FEAT_FGT) && (!HaveEL(EL3) || SCR_EL3().FGTEn == '1') && HDFGWTR_EL2().TRC == '1' then AArch64_SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && CPTR_EL3().TTA == '1' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; elsif IsFeatureImplemented(FEAT_TRBE_EXT) && OSLSR_EL1().OSLK == '0' && HaltingAllowed() && EDSCR2().TTA == '1' then Halt(DebugHalt_SoftwareAccess); else TRCSSPCICR(m) = X{64}(t); end; elsif PSTATE.EL == EL2 then if CPTR_EL2().TTA == '1' then AArch64_SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && CPTR_EL3().TTA == '1' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; elsif IsFeatureImplemented(FEAT_TRBE_EXT) && OSLSR_EL1().OSLK == '0' && HaltingAllowed() && EDSCR2().TTA == '1' then Halt(DebugHalt_SoftwareAccess); else TRCSSPCICR(m) = X{64}(t); end; elsif PSTATE.EL == EL3 then if CPTR_EL3().TTA == '1' then AArch64_SystemAccessTrap(EL3, 0x18); elsif IsFeatureImplemented(FEAT_TRBE_EXT) && OSLSR_EL1().OSLK == '0' && HaltingAllowed() && EDSCR2().TTA == '1' then Halt(DebugHalt_SoftwareAccess); else TRCSSPCICR(m) = X{64}(t); end; end;
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