EasyManuals Logo

ARM Cortex-A35 User Manual

Default Icon
894 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #287 background imageLoading...
Page #287 background image
B1.83 Memory Model Feature Register 3
The ID_MMFR3 characteristics are:
Purpose
Provides information about the memory model and memory management support in AArch32.
Usage constraints
This register is accessible as follows:
EL0
(NS)
EL0
(S)
EL1
(NS)
EL1
(S)
EL2
EL3
(SCR.NS = 1)
EL3
(SCR.NS = 0)
- - RO RO RO RO RO
Must be interpreted with ID_MMFR0, ID_MMFR1, and ID_MMFR2. See:
B1.80 Memory Model Feature Register 0 on page B1-281
B1.81 Memory Model Feature Register 1 on page B1-283
B1.82 Memory Model Feature Register 2 on page B1-285
Configurations
ID_MMFR3 is architecturally mapped to AArch64 register ID_MMFR3_EL1. See
B2.66 AArch32 Memory Model Feature Register 3, EL1 on page B2-473.
There is one copy of this register that is used in both Secure and Non-secure states.
Attributes
ID_MMFR3 is a 32-bit register.
31
12 11 8 7 04 328 27 24 23 20 19 16 15
ReservedCohWalkCMemSzSupersec MaintBcst BPMaint CMaintSW CMaintVA
Figure B1-38 ID_MMFR3 bit assignments
Supersec, [31:28]
Supersections. Indicates support for supersections:
0x0 Supersections supported.
CMemSz, [27:24]
Cached Memory Size. Indicates the size of physical memory supported by the processor caches:
0x2 1TByte, corresponding to a 40-bit physical address range.
CohWalk, [23:20]
Coherent walk. Indicates whether translation table updates require a clean to the point of
unification:
0x1 Updates to the translation tables do not require a clean to the point of unification to
ensure visibility by subsequent translation table walks.
[19:16]
Reserved, RES0.
MaintBcst, [15:12]
Maintenance broadcast. Indicates whether cache, TLB and branch predictor operations are
broadcast:
B1 AArch32 system registers
B1.83 Memory Model Feature Register 3
100236_0100_00_en Copyright © 2015–2017, 2019 Arm Limited or its affiliates. All rights
reserved.
B1-287
Non-Confidential

Table of Contents

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the ARM Cortex-A35 and is the answer not in the manual?

ARM Cortex-A35 Specifications

General IconGeneral
BrandARM
ModelCortex-A35
CategoryComputer Hardware
LanguageEnglish

Related product manuals