Technical data

CHALLENGE/Onyx Diagnostic Road Map 7-3
7.2.1.1 IP19-Specific Messages
The following message means that the R4400 detected a problem in its interface to the CC
chip, or in the secondary cache SIMMs:
CPU 26: ECC PANIC: Uncorrectable HARDWARE ECC error...
PANIC MSG: ...
XXX: ...
PANIC: CPU n: Uncorrectable ecc/parity error
In this kind of message, XXX is any of:
primary i-cache an R4400 chip problem
primary d-cache an R4400 chip problem
secondary i-cache a likely IP19 Scache SIMM problem
secondary d-cache a likely IP19 Scache SIMM problem
CPU SysAD bus a likely problem on the IP19 board
This is probably a hardware problem. Note that it does not refer to main memory. MC3
ECC errors are reported in HARDWARE ERROR STATE messages.
7.2.1.2 IP21-Specific Messages
PANIC CPU 0 TFP G-chache parity error,
EPC a800000000121fb8 CAUSE 30000 SR 220007ff03
7.2.2 Hardware Error State Messages
The HARDWARE ERROR STATE message sequence means that the CPU received a
hardware Bus Error signal in response to a read operation, or that a CPU received an error
interrupt from an error detecting chip. This message format is used to convey almost all
error conditions detected by the hardware itself.
The CHALLENGE/Onyx hardware error state looks like:
HARDWARE ERROR STATE:
+ <board name> in slot 1
+ <Error register name>: <value>
+ bit number: <meaning of the bit>
For a detailed description of all possible HARDWARE ERROR STATE messages, refer to
Section 2.4, “ASIC Error Detection.” Important cases are described in the next section.