Altera Mentor Verification IP Altera Edition AMBA AXI3/4T Manual do Utilizador descarregar pdf (Página 89)

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SystemVerilog AXI3 and AXI4 Slave BFMs

Slave BFM Configuration

Mentor VIP AE AXI3/4 User Guide, V10.2b

September 2013

A slave BFM has configuration fields that you can set with the set_config() function to

configure timeout factors, slave exclusive support, setup and hold times, etc. You can also get

the value of a configuration field via the get_config() function.

The full list of configuration fields is described in Table 4-2 below.

**_ID_WIDTH ID signal width in bits. This applies to the RID and WID signals.

Refer to the AMBA AXI Protocol specification for more details.

Default: 4.

AXI4_USER_WIDTH (AXI4) User data signal width in bits. This applies to the

ARUSER, AWUSER, RUSER, WUSER and BUSER signals.

Refer to the AMBA AXI Protocol specification for more details.

Default: 8.

AXI4_REGION_MAP_SIZE (AXI4) Region signal width in bits. This applies to the

ARREGION and AWREGION signals. Refer to the AMBA AXI

Protocol specification for more details. Default: 16.

Table 4-2. Slave BFM Configuration

Configuration Field Description

Timing Variables

**_CONFIG_SETUP_TIME The setup-time prior to the active edge of

ACLK, in units of simulator time-steps for

all signals.

Default: 0.

**_CONFIG_HOLD_TIME The hold-time after the active edge of

ACLK, in units of simulator time-steps for

all signals.

Default: 0.

**_CONFIG_MAX_TRANSACTION_

TIME_FACTOR

The maximum timeout duration for a

read/write transaction in clock cycles.

Default: 100000.

AXI_CONFIG_TIMEOUT_MAX_DATA_TRANSFER (AXI3) The maximum number of write

data beats that the AXI3 BFM can

generate as part of write data burst of

write transfer. Default: 1024.

**_CONFIG_BURST_TIMEOUT_FACTOR The maximum delay between the

individual phases of a read/write

transaction in clock cycles. Default:

10000.

**_CONFIG_MAX_LATENCY_AWVALID_

ASSERTION_TO_AWREADY

The maximum timeout duration from the

assertion of AWVALID to the assertion of

AWREADY in clock periods (default

10000).

**_CONFIG_MAX_LATENCY_ARVALID_

ASSERTION_TO_ARREADY

The maximum timeout duration from the

assertion of ARVALID to the assertion of

ARREADY in clock periods (default

10000).

Table 4-1. Slave BFM Signal Width Parameters

Signal Width Parameter Description

1 2 ... 84 85 86 87 88 89 90 91 92 93 94 ... 782 783

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