2.3.14. Register 15, RAM and TAG BIST test registers

Register 15 gives you access to the test features included within the ARM946E-S.

The register map for CP15 register 15 BIST-related instructions is shown in Table 2.24.

Table 2.24. Register 15, BIST instructions

Register

Read

Write

TAG BIST control register

MRC p15, 0, rd, c15, c0, 1

MCR p15, 0, rd, c15, c0, 1

RAM BIST control register

MRC p15, 1, rd, c15, c0, 1

MCR p15, 1, rd, c15, c0, 1

Cache RAM BIST control register

MRC p15, 2, rd, c15, c0, 1

MCR p15, 2, rd, c15, c0, 1

Table 2.25 lists CP15 register 15 implementation-specific BIST instructions.

Table 2.25. Register 15, implementation-specific BIST instructions

Register

Read

Write

Instruction TAG BIST address register

MRC p15, 0, rd, c15, c0, 2

MCR p15, 0, rd, c15, c0, 2

Instruction TAG BIST general register

MRC p15, 0, rd, c15, c0, 3

MCR p15, 0, rd, c15, c0, 3

Data TAG BIST address register

MRC p15, 0, rd, c15, c0, 6

MCR p15, 0, rd, c15, c0, 6

Data TAG BIST general register

MRC p15, 0, rd, c15, c0, 7

MCR p15, 0, rd, c15, c0, 7

Instruction RAM BIST address register

MRC p15, 1, rd, c15, c0, 2

MCR p15, 1, rd, c15, c0, 2

Instruction RAM BIST general register

MRC p15, 1, rd, c15, c0, 3

MCR p15, 1, rd, c15, c0, 3

Data RAM BIST address register

MRC p15, 1, rd, c15, c0, 6

MCR p15, 1, rd, c15, c0, 6

Data RAM BIST general register

MRC p15, 1, rd, c15, c0, 7

MCR p15, 1, rd, c15, c0, 7

Instruction cache RAM BIST address register

MRC p15, 2, Rd, c15, c0, 2

MCR p15, 2, Rd, c15, c0, 2

Instruction cache RAM BIST general register

MRC p15, 2, Rd, c15, c0, 3

MCR p15, 2, Rd, c15, c0, 3

Data cache RAM BIST address register

MRC p15, 2, Rd, c15, c0, 6

MCR p15, 2, Rd, c15, c0, 6

Data cache RAM BIST general register

MRC p15, 2, Rd, c15, c0, 7

MCR p15, 2, Rd, c15, c0, 7

Note

ARM recommends that you do not write application code that relies on the presence of the BIST address and general registers. ARM does not guarantee to support these registers in future versions of the ARM946E-S.

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