PMMIR, Performance Monitors Machine Identification Register

The PMMIR characteristics are:

Purpose

Describes Performance Monitors parameters specific to the implementation to software.

Configuration

This register is present only when ARMv8.4-PMU is implemented. Otherwise, direct accesses to PMMIR are UNDEFINED.

Attributes

PMMIR is a 32-bit register.

Field descriptions

The PMMIR bit assignments are:

313029282726252423222120191817161514131211109876543210
000000000000000000000000SLOTS

Bits [31:8]

Reserved, RES0.

SLOTS, bits [7:0]

Operation width. The largest value by which the STALL_SLOT event might increment by in a single cycle. If the STALL_SLOT event is not implemented, this field might read as zero.

Accessing the PMMIR

Accesses to this register use the following encodings:

MRC{<c>}{<q>} <coproc>, {#}<opc1>, <Rt>, <CRn>, <CRm>{, {#}<opc2>}

opc1opc2CRncoprocCRm
0b0000b1100b10010b11110b1110

if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EL2Enabled() && !ELUsingAArch32(EL2) && HSTR_EL2.T9 == '1' then AArch64.AArch32SystemAccessTrap(EL2, 0x03); elsif EL2Enabled() && ELUsingAArch32(EL2) && HSTR.T9 == '1' then AArch32.TakeHypTrapException(0x03); elsif EL2Enabled() && !ELUsingAArch32(EL2) && MDCR_EL2.TPM == '1' then AArch64.AArch32SystemAccessTrap(EL2, 0x03); elsif EL2Enabled() && ELUsingAArch32(EL2) && HDCR.TPM == '1' then AArch32.TakeHypTrapException(0x03); elsif HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TPM == '1' then AArch64.AArch32SystemAccessTrap(EL3, 0x03); else return PMMIR; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TPM == '1' then AArch64.AArch32SystemAccessTrap(EL3, 0x03); else return PMMIR; elsif PSTATE.EL == EL3 then return PMMIR;




13/12/2018 16:42; 6379d01c197f1d40720d32d0f84c419c9187c009

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