The SPMIIDR_EL1 characteristics are:
Provides discovery information for System PMU <s>.
This register is present only when FEAT_SPMU is implemented. Otherwise, direct accesses to SPMIIDR_EL1 are UNDEFINED.
SPMIIDR_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 | |||||||||||||||||||||||||||||||
| ProductID | Variant | Revision | Implementer | ||||||||||||||||||||||||||||
Reserved, RES0.
Part number, bits [11:0]. The part number is selected by the designer of the component.
This field has an IMPLEMENTATION DEFINED value.
Access to this field is RO.
Component major revision.
Defines either a variant of the component defined by SPMIIDR_EL1.ProductID, or the major revision of the component.
When defining a major revision, SPMIIDR_EL1.Variant and SPMIIDR_EL1.Revision together form the revision number of the component, with SPMIIDR_EL1.Variant being the most significant part and SPMIIDR_EL1.Revision the least significant part. When a component is changed, SPMIIDR_EL1.Variant or SPMIIDR_EL1.Revision is increased to ensure that software can differentiate the different revisions of the component. If SPMIIDR_EL1.Variant is increased then SPMIIDR_EL1.Revision should be set to 0b0000.
This field has an IMPLEMENTATION DEFINED value.
Access to this field is RO.
Component minor revision.
When a component is changed:
This field has an IMPLEMENTATION DEFINED value.
Access to this field is RO.
Contains the JEP106 manufacturer's identification code of the designer of the System PMU.
The code identifies the designer of the component, which might not be the same as the implementer of the device containing the component.
For an implementation designed by Arm, this field reads as 0x43B.
Bits [11:8] contain the JEP106 bank identifier of the designer minus 1.
Bit 7 is RES0.
Bits [6:0] contain bits [6:0] of the JEP106 manufacturer's identification code of the designer.
This field has an IMPLEMENTATION DEFINED value.
Access to this field is RO.
To access SPMIIDR_EL1 for System PMU <s>, set SPMSELR_EL0.SYSPMUSEL to s.
SPMIIDR_EL1 reads-as-zero if any of the following are true:
Accesses to this register use the following encodings in the System register encoding space:
| op0 | op1 | CRn | CRm | op2 |
|---|---|---|---|---|
| 0b10 | 0b000 | 0b1001 | 0b1101 | 0b100 |
if !IsFeatureImplemented(FEAT_SPMU) then UNDEFINED; elsif PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if HaveEL(EL3) && EL3SDDUndefPriority() && MDCR_EL3.EnPM2 == '0' then UNDEFINED; elsif HaveEL(EL3) && EL3SDDUndefPriority() && SPMACCESSR_EL3<UInt(SPMSELR_EL0.SYSPMUSEL) * 2+:2> == '00' then UNDEFINED; elsif EL2Enabled() && IsFeatureImplemented(FEAT_FGT2) && ((HaveEL(EL3) && SCR_EL3.FGTEn2 == '0') || HDFGRTR2_EL2.nSPMID == '0') then AArch64.SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && MDCR_EL2.EnSPM == '0' then AArch64.SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && SPMACCESSR_EL2<UInt(SPMSELR_EL0.SYSPMUSEL) * 2+:2> == '00' then AArch64.SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && MDCR_EL3.EnPM2 == '0' then if EL3SDDUndef() then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); elsif HaveEL(EL3) && SPMACCESSR_EL3<UInt(SPMSELR_EL0.SYSPMUSEL) * 2+:2> == '00' then if EL3SDDUndef() then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); else X[t, 64] = SPMIIDR_EL1[UInt(SPMSELR_EL0.SYSPMUSEL)]; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && EL3SDDUndefPriority() && MDCR_EL3.EnPM2 == '0' then UNDEFINED; elsif HaveEL(EL3) && EL3SDDUndefPriority() && SPMACCESSR_EL3<UInt(SPMSELR_EL0.SYSPMUSEL) * 2+:2> == '00' then UNDEFINED; elsif HaveEL(EL3) && MDCR_EL3.EnPM2 == '0' then if EL3SDDUndef() then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); elsif HaveEL(EL3) && SPMACCESSR_EL3<UInt(SPMSELR_EL0.SYSPMUSEL) * 2+:2> == '00' then if EL3SDDUndef() then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); else X[t, 64] = SPMIIDR_EL1[UInt(SPMSELR_EL0.SYSPMUSEL)]; elsif PSTATE.EL == EL3 then X[t, 64] = SPMIIDR_EL1[UInt(SPMSELR_EL0.SYSPMUSEL)];
15/12/2024 22:27; 5e0a212688c6bd7aee92394b6f5e491b4d0fee1d
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