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11.2. Entering and exiting AMBA Test

Six test modes exist:

  • functional test

  • PA TAG RAM test

  • instruction MMU test

  • data MMU test

  • instruction cache test

  • data cache test.

The address of the state location is 0x0. A write to this location changes the test mode, as shown in Table 11.1. An example TIF file is shown in Example 11.1.

AMBA test modes

Test mode

Write data

Exit test

0x0

Functional test

0x1

PA TAG RAM test

0x2

Instruction MMU test

0x3

Data MMU test

0x4

Instruction cache test

0x5

Data cache test

0x6

; Address State Location
A 00000000
; Enter Functional Test Mode
W 00000001

<Body of Functional Test>

; Address State Location
A 00000000
; Exit Test Mode
W 00000000
E ZZZZZZZZ
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