ARM Cortex-A35 User Manual

B2.38 CPU Memory Error Syndrome Register, EL1
The CPUMERRSR_EL1 characteristics are:
Purpose
Holds ECC errors on the:
• L1 data RAMs.
• L1 tag RAMs.
• L1 dirty RAMs.
• TLB RAMs.
This register is used for recording ECC errors on all processor RAMs.
Usage constraints
This register is accessible as follows:
EL0 EL1
(NS)
EL1
(S)
EL2
EL3
(SCR.NS = 1)
EL3
(SCR.NS = 0)
- RW RW RW RW RW
Configurations
The CPUMERRSR_EL1 is mapped to the AArch32 CPUMERRSR register. See B1.44 CPU
Memory Error Syndrome Register on page B1-214.
There is one copy of this register that is used in both Secure and Non-secure states.
A write of any value to the register updates the register to 0x0000000000000000.
Attributes
CPUMERRSR_EL1 is a a 64-bit register.
24
23 21 20
Other error
count
Repeat error
count
3132 063
RES0
4748 40 39 30
Valid
RAMID
18 17
RES0
CPUID/Way
RAM address
Fatal
RES0
12 1162
Figure B2-13 CPUMERRSR_EL1 bit assignments
Fatal, [63]
Fatal bit. This bit is set to 1 on the first memory error that caused a data abort. It is a sticky bit
so that after it is set, it remains set until the register is written.
The reset value is 0.
[62:48]
Reserved, RES0.
Other error count, [47:40]
This field is set to 0 on the first memory error and is incremented on any memory error that does
not match the RAMID and Bank/Way information in this register while the sticky Valid bit is
set.
The reset value is 0.
B2 AArch64 system registers
B2.38 CPU Memory Error Syndrome Register, EL1
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ARM Cortex-A35 Specifications

General

Brand	ARM
Model	Cortex-A35
Category	Computer Hardware
Language	English