(old) | htmldiff from- | (new) |
The HAMAIR1 characteristics are:
Provides IMPLEMENTATION DEFINED memory attributes for the memory attribute encodings defined by HMAIR1. These IMPLEMENTATION DEFINED attributes can only provide additional qualifiers for the memory attribute encodings, and cannot change the memory attributes defined in HMAIR1.
AArch32 System register HAMAIR1 bits [31:0] are architecturally mapped to AArch64 System register AMAIR_EL2[63:32] .
This register is present only
when AArch32 is supported at any Exception level.
Otherwise, direct accesses to HAMAIR1 are UNDEFINEDUNKNOWN.
If EL2 is not implemented, this register is RES0 from EL3.
HAMAIR1 is a 32-bit register.
The HAMAIR1 bit assignments are:
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 |
IMPLEMENTATION DEFINED |
If an implementation does not provide any IMPLEMENTATION DEFINED memory attributes, this register is RES0.
IMPLEMENTATION DEFINED.
This field resets to an architecturally UNKNOWN value.
Accesses to this register use the following encodings:
coproc | opc1 | CRn | CRm | opc2 |
---|---|---|---|---|
0b1111 | 0b100 | 0b1010 | 0b0011 | 0b001 |
if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EL2Enabled() && !ELUsingAArch32(EL2) && HSTR_EL2.T10 == '1' then AArch64.AArch32SystemAccessTrap(EL2, 0x03); elsif EL2Enabled() && ELUsingAArch32(EL2) && HSTR.T10 == '1' then AArch32.TakeHypTrapException(0x03); else UNDEFINED; elsif PSTATE.EL == EL2 then return HAMAIR1; elsif PSTATE.EL == EL3 then if SCR.NS == '0' then UNDEFINED; else return HAMAIR1;
coproc | opc1 | CRn | CRm | opc2 |
---|---|---|---|---|
0b1111 | 0b100 | 0b1010 | 0b0011 | 0b001 |
if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EL2Enabled() && !ELUsingAArch32(EL2) && HSTR_EL2.T10 == '1' then AArch64.AArch32SystemAccessTrap(EL2, 0x03); elsif EL2Enabled() && ELUsingAArch32(EL2) && HSTR.T10 == '1' then AArch32.TakeHypTrapException(0x03); else UNDEFINED; elsif PSTATE.EL == EL2 then HAMAIR1 = R[t]; elsif PSTATE.EL == EL3 then if SCR.NS == '0' then UNDEFINED; else HAMAIR1 = R[t];
0114/0704/2020 1520:5709; 80324f0b9997bede489cc15ad1565345720bcd2adff0d3e465311dd9ce541b6a1e1d6c05a0668645
Copyright © 2010-2020 Arm Limited or its affiliates. All rights reserved. This document is Non-Confidential.
(old) | htmldiff from- | (new) |