Monitor: Power-up Diagnostic/Test Commands

POWER-UP DIAGNOSTIC/TEST COMMANDS

The following on-card functional tests are available to be run at any time, including power- up and reset. The nonvolatile configuration memory can be used to enable or disable the execution of these tests on power-up and reset (see the nvdisplay command’s Misc group in Table 8-1).

The results of the tests are stored at an offset of 0x60 in the I2C EEPROM. To read the PASS/FAIL flags, do four byte reads from the EEPROM at 0x60, 0x61, 0x62, and 0x63. The byte at 0x60 should contain the magic number 0xa5 indicating that the device is functional and that PASS/FAIL reporting is supported. The values for the long word when a failure occurs are listed in Table 8-3.

Table 8-3:NVRAM Power-up Diagnostic PASS/FAIL Flags

Test:

Value Read on Failure:

Serial

0xa5000001

 

 

Counter/Timer

0xa5000002

 

 

Cache

0xa5000010

 

 

EEPROM

0xa5000020

 

 

The power-up PASS/FAIL flags are also written to PLX Mailbox 0. The module writes the progress and PASS/FAIL status of each of its power-up tests to PCI so that the baseboard can determine the power-up status of the module and proceed accordingly. At the conclu- sion of power-up, the same magic number (0xa5) used in the NVRAM PASS/FAIL flags is written to the least significant bit (LSB) of PLX Mailbox 0. The PLX Mailbox 0 register can be polled until the magic number is displayed and then checked to see if there are any fail mask bits set. The following bits in Table 8-4are used to indicate the power-up test sequence and failure.

Table 8-4:PLX Mailbox 0 Sequence and Fail Mask Bits

Power-up Test:

Sequence Bit:

Fail Mask Bit:

Counter/Timer

0x02000000

0x00000002

 

 

 

Cache

0x05000000

0x00000010

 

 

 

EEPROM

0x06000000

0x00000020

 

 

 

Parity DRAM Memory

0x0A000000

0x00000200

 

 

 

Data DRAM Memory

0x0B000000

0x00000400

 

 

 

For example, if the module had a memory failure, the PLX Mailbox 0 register would contain 0x0B000400. For parity and DRAM failures, the same register would contain 0x0A000600. The magic number 0xa5 will not be in the LSB of the PLX Mailbox 0 register because if a memory error is encountered, then the debug monitor is entered. If all power-up tests pass, the PLX Mailbox 0 will be 0xA5000000.

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PmT1 and PmE1 User’s Manual

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Emerson PMT1 Monitor Power-up Diagnostic/Test Commands, POWER-UP DIAGNOSTIC/TEST Commands, Test Value Read on Failure
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PMT1, PME1 specifications

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