Technical data

Chapter 3
Diagnostics
Shelf Manager (ShMM) Diagnostics User Interface
132
Shelf Manager (ShMM) Diagnostics User Interface
ShMM Diagnostics Overall Interface Description
This section describes the ShMM diagnostics interface.
Power-On Self Tests
Power-On Self-Test (POST) diagnostics run at power-on and during boot. Six areas are tested by POST:
• memory – tests SDRAM
•i2c – checks the I
2
C bus
• uart – tests the UARTs
• ethernet – tests the Ethernet port
• crc – performs a CRC check on the ROM
• ipmb – tests the ipmb bus (This test is currently disabled)
POST reports PASS or FAIL for each test. POST tests can be run manually from the U-boot firmware menu.
Online Tests
There are two types of online tests: Hardware and memory.
The hardware tests exercise the ports and test the checksums of the firmware. The memory tests verify the
memory interfaces in the kernel and that the memory is free of faults
NOTE The ShMM does not have the ability to report single-bit memory errors.
Hardware Tests
The available hardware tests are:
• shmm_uart_test – tests the UARTs
• shmm_eth_test – tests the Ethernet interfaces
• shmm_crc_test – tests the firmware checksums
Memory Tests
• mem01 – malloc’s all available memory to ensure that the memory is clean
• mem02 – tests all the kernel memory interfaces (malloc, calloc, and so on), and Reads/Writes this memory.
These test are usually run from the shell and may be included in scripts. The following example will run the
mem02 test until it is interrupted by the user.
# while true
> do