The PMBPTR_EL1 characteristics are:
Defines the current write pointer for the profiling buffer.
This register is present only when FEAT_SPE is implemented. Otherwise, direct accesses to PMBPTR_EL1 are UNDEFINED.
PMBPTR_EL1 is a 64-bit register.
The PMBPTR_EL1 bit assignments are:
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 |
PTR | |||||||||||||||||||||||||||||||
PTR | |||||||||||||||||||||||||||||||
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 |
Current write address. Defines the virtual address of the next entry to be written to the buffer.
The architecture places restrictions on the values software can write to the pointer. For more information see 'Restrictions on the current write pointer'.
As a result, an implementation might treat some of bits[M:0], where M is defined by PMBIDR_EL1.Align, as RES0.
On a management interrupt, PMBPTR_EL1 is frozen.
On a Warm reset, this field resets to an architecturally UNKNOWN value.
Accesses to this register use the following encodings:
op0 | op1 | CRn | CRm | op2 |
---|---|---|---|---|
0b11 | 0b000 | 0b1001 | 0b1010 | 0b001 |
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'" && SCR_EL3.NS == '0' && MDCR_EL3.NSPB != '01' then UNDEFINED; elsif Halted() && HaveEL(EL3) && EDSCR.SDD == '1' && boolean IMPLEMENTATION_DEFINED "EL3 trap priority when SDD == '1'" && SCR_EL3.NS == '1' && MDCR_EL3.NSPB != '11' then UNDEFINED; elsif EL2Enabled() && (!HaveEL(EL3) || SCR_EL3.FGTEn == '1') && HDFGRTR_EL2.PMBPTR_EL1 == '1' then AArch64.SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && MDCR_EL2.E2PB == 'x0' then AArch64.SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && SCR_EL3.NS == '0' && MDCR_EL3.NSPB != '01' then if Halted() && EDSCR.SDD == '1' then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); elsif HaveEL(EL3) && SCR_EL3.NS == '1' && MDCR_EL3.NSPB != '11' then if Halted() && EDSCR.SDD == '1' then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); elsif EL2Enabled() && HCR_EL2.<NV2,NV1,NV> == '1x1' then return NVMem[0x810]; else return PMBPTR_EL1; elsif PSTATE.EL == EL2 then if Halted() && HaveEL(EL3) && EDSCR.SDD == '1' && boolean IMPLEMENTATION_DEFINED "EL3 trap priority when SDD == '1'" && SCR_EL3.NS == '0' && MDCR_EL3.NSPB != '01' then UNDEFINED; elsif Halted() && HaveEL(EL3) && EDSCR.SDD == '1' && boolean IMPLEMENTATION_DEFINED "EL3 trap priority when SDD == '1'" && SCR_EL3.NS == '1' && MDCR_EL3.NSPB != '11' then UNDEFINED; elsif HaveEL(EL3) && SCR_EL3.NS == '0' && MDCR_EL3.NSPB != '01' then if Halted() && EDSCR.SDD == '1' then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); elsif HaveEL(EL3) && SCR_EL3.NS == '1' && MDCR_EL3.NSPB != '11' then if Halted() && EDSCR.SDD == '1' then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); else return PMBPTR_EL1; elsif PSTATE.EL == EL3 then return PMBPTR_EL1;
op0 | op1 | CRn | CRm | op2 |
---|---|---|---|---|
0b11 | 0b000 | 0b1001 | 0b1010 | 0b001 |
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'" && SCR_EL3.NS == '0' && MDCR_EL3.NSPB != '01' then UNDEFINED; elsif Halted() && HaveEL(EL3) && EDSCR.SDD == '1' && boolean IMPLEMENTATION_DEFINED "EL3 trap priority when SDD == '1'" && SCR_EL3.NS == '1' && MDCR_EL3.NSPB != '11' then UNDEFINED; elsif EL2Enabled() && (!HaveEL(EL3) || SCR_EL3.FGTEn == '1') && HDFGWTR_EL2.PMBPTR_EL1 == '1' then AArch64.SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && MDCR_EL2.E2PB == 'x0' then AArch64.SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && SCR_EL3.NS == '0' && MDCR_EL3.NSPB != '01' then if Halted() && EDSCR.SDD == '1' then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); elsif HaveEL(EL3) && SCR_EL3.NS == '1' && MDCR_EL3.NSPB != '11' then if Halted() && EDSCR.SDD == '1' then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); elsif EL2Enabled() && HCR_EL2.<NV2,NV1,NV> == '1x1' then NVMem[0x810] = X[t]; else PMBPTR_EL1 = X[t]; elsif PSTATE.EL == EL2 then if Halted() && HaveEL(EL3) && EDSCR.SDD == '1' && boolean IMPLEMENTATION_DEFINED "EL3 trap priority when SDD == '1'" && SCR_EL3.NS == '0' && MDCR_EL3.NSPB != '01' then UNDEFINED; elsif Halted() && HaveEL(EL3) && EDSCR.SDD == '1' && boolean IMPLEMENTATION_DEFINED "EL3 trap priority when SDD == '1'" && SCR_EL3.NS == '1' && MDCR_EL3.NSPB != '11' then UNDEFINED; elsif HaveEL(EL3) && SCR_EL3.NS == '0' && MDCR_EL3.NSPB != '01' then if Halted() && EDSCR.SDD == '1' then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); elsif HaveEL(EL3) && SCR_EL3.NS == '1' && MDCR_EL3.NSPB != '11' then if Halted() && EDSCR.SDD == '1' then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); else PMBPTR_EL1 = X[t]; elsif PSTATE.EL == EL3 then PMBPTR_EL1 = X[t];
01/07/2020 15:57; 80324f0b9997bede489cc15ad1565345720bcd2a
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