Selects an error record to be accessed through the Error Record System registers.
AArch64 System register ERRSELR_EL1 bits [31:0] are architecturally mapped to AArch32 System register ERRSELR[31:0].
This register is present only when FEAT_RAS is implemented. Otherwise, direct accesses to ERRSELR_EL1 are UNDEFINED.
If ERRIDR_EL1 indicates that zero error records are implemented, then it is IMPLEMENTATION DEFINED whether ERRSELR_EL1 is UNDEFINED or RES0.
ERRSELR_EL1 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 | SEL | ||||||||||||||||||||||||||||||
Reserved, RES0.
Selects the error record accessed through the ERX registers.
For example, if ERRSELR_EL1.SEL is 0x0004, then direct reads and writes of ERXSTATUS_EL1 access ERR4STATUS.
If ERRSELR_EL1.SEL is greater than or equal to ERRIDR_EL1.NUM, then all of the following apply:
The reset behavior of this field is:
Accesses to this register use the following encodings in the System register encoding space:
MRS <Xt>, ERRSELR_EL1
| op0 | op1 | CRn | CRm | op2 |
|---|---|---|---|---|
| 0b11 | 0b000 | 0b0101 | 0b0011 | 0b001 |
if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if HaveEL(EL3) && EL3SDDUndefPriority() && SCR_EL3.TERR == '1' then UNDEFINED; elsif EL2Enabled() && HCR_EL2.TERR == '1' then AArch64.SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && IsFeatureImplemented(FEAT_FGT) && (!HaveEL(EL3) || SCR_EL3.FGTEn == '1') && HFGRTR_EL2.ERRSELR_EL1 == '1' then AArch64.SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && SCR_EL3.TERR == '1' then if EL3SDDUndef() then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); else X[t, 64] = ERRSELR_EL1; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && EL3SDDUndefPriority() && SCR_EL3.TERR == '1' then UNDEFINED; elsif HaveEL(EL3) && SCR_EL3.TERR == '1' then if EL3SDDUndef() then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); else X[t, 64] = ERRSELR_EL1; elsif PSTATE.EL == EL3 then X[t, 64] = ERRSELR_EL1;
MSR ERRSELR_EL1, <Xt>
| op0 | op1 | CRn | CRm | op2 |
|---|---|---|---|---|
| 0b11 | 0b000 | 0b0101 | 0b0011 | 0b001 |
if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if HaveEL(EL3) && EL3SDDUndefPriority() && SCR_EL3.TERR == '1' then UNDEFINED; elsif HaveEL(EL3) && EL3SDDUndefPriority() && SCR_EL3.TWERR == '1' then UNDEFINED; elsif EL2Enabled() && HCR_EL2.TERR == '1' then AArch64.SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && IsFeatureImplemented(FEAT_FGT) && (!HaveEL(EL3) || SCR_EL3.FGTEn == '1') && HFGWTR_EL2.ERRSELR_EL1 == '1' then AArch64.SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && SCR_EL3.TERR == '1' then if EL3SDDUndef() then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); elsif HaveEL(EL3) && SCR_EL3.TWERR == '1' then if EL3SDDUndef() then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); else ERRSELR_EL1 = X[t, 64]; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && EL3SDDUndefPriority() && SCR_EL3.TERR == '1' then UNDEFINED; elsif HaveEL(EL3) && EL3SDDUndefPriority() && SCR_EL3.TWERR == '1' then UNDEFINED; elsif HaveEL(EL3) && SCR_EL3.TERR == '1' then if EL3SDDUndef() then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); elsif HaveEL(EL3) && SCR_EL3.TWERR == '1' then if EL3SDDUndef() then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); else ERRSELR_EL1 = X[t, 64]; elsif PSTATE.EL == EL3 then ERRSELR_EL1 = X[t, 64];