Bit Bashing Test Sequences

This section defines classes that test individual bits of the registers defined in a register model.

Contents
Bit Bashing Test SequencesThis section defines classes that test individual bits of the registers defined in a register model.
uvm_reg_single_bit_bash_seqVerify the implementation of a single register by attempting to write 1’s and 0’s to every bit in it, via every address map in which the register is mapped, making sure that the resulting value matches the mirrored value.
uvm_reg_bit_bash_seqVerify the implementation of all registers in a block by executing the uvm_reg_single_bit_bash_seq sequence on it.

uvm_reg_single_bit_bash_seq

Verify the implementation of a single register by attempting to write 1’s and 0’s to every bit in it, via every address map in which the register is mapped, making sure that the resulting value matches the mirrored value.

If bit-type resource named “NO_REG_TESTS” or “NO_REG_BIT_BASH_TEST” in the “REG::” namespace matches the full name of the register, the register is not tested.

uvm_resource_db#(bit)::set({"REG::",regmodel.blk.r0.get_full_name()},
                           "NO_REG_TESTS", 1, this);

Registers that contain fields with unknown access policies cannot be tested.

The DUT should be idle and not modify any register during this test.

Summary
uvm_reg_single_bit_bash_seq
Verify the implementation of a single register by attempting to write 1’s and 0’s to every bit in it, via every address map in which the register is mapped, making sure that the resulting value matches the mirrored value.
Class Hierarchy
uvm_reg_sequence#(uvm_sequence#(uvm_reg_item))
uvm_reg_single_bit_bash_seq
Class Declaration
class uvm_reg_single_bit_bash_seq extends uvm_reg_sequence #(
    uvm_sequence  #(uvm_reg_item)
)
Variables
rgThe register to be tested

Variables

rg

uvm_reg rg

The register to be tested

uvm_reg_bit_bash_seq

Verify the implementation of all registers in a block by executing the uvm_reg_single_bit_bash_seq sequence on it.

If bit-type resource named “NO_REG_TESTS” or “NO_REG_BIT_BASH_TEST” in the “REG::” namespace matches the full name of the block, the block is not tested.

uvm_resource_db#(bit)::set({"REG::",regmodel.blk.get_full_name(),".*"},
                           "NO_REG_TESTS", 1, this);
Summary
uvm_reg_bit_bash_seq
Verify the implementation of all registers in a block by executing the uvm_reg_single_bit_bash_seq sequence on it.
Class Hierarchy
uvm_reg_sequence#(uvm_sequence#(uvm_reg_item))
uvm_reg_bit_bash_seq
Class Declaration
class uvm_reg_bit_bash_seq extends uvm_reg_sequence #(
    uvm_sequence  #(uvm_reg_item)
)
Variables
modelThe block to be tested.
reg_seqThe sequence used to test one register
Methods
bodyExecutes the Register Bit Bash sequence.
do_blockTest all of the registers in a given block
reset_blkReset the DUT that corresponds to the specified block abstraction class.

Variables

model

The block to be tested.  Declared in the base class.

uvm_reg_block model;

reg_seq

protected uvm_reg_single_bit_bash_seq reg_seq

The sequence used to test one register

Methods

body

virtual task body()

Executes the Register Bit Bash sequence.  Do not call directly.  Use seq.start() instead.

do_block

protected virtual task do_block(
    uvm_reg_block  blk
)

Test all of the registers in a given block

reset_blk

virtual task reset_blk(
    uvm_reg_block  blk
)

Reset the DUT that corresponds to the specified block abstraction class.

Currently empty.  Will rollback the environment’s phase to the reset phase once the new phasing is available.

In the meantime, the DUT should be reset before executing this test sequence or this method should be implemented in an extension to reset the DUT.

class uvm_reg_single_bit_bash_seq extends uvm_reg_sequence #(
    uvm_sequence  #(uvm_reg_item)
)
Verify the implementation of a single register by attempting to write 1’s and 0’s to every bit in it, via every address map in which the register is mapped, making sure that the resulting value matches the mirrored value.
class uvm_reg_bit_bash_seq extends uvm_reg_sequence #(
    uvm_sequence  #(uvm_reg_item)
)
Verify the implementation of all registers in a block by executing the uvm_reg_single_bit_bash_seq sequence on it.
uvm_reg rg
The register to be tested
protected uvm_reg_single_bit_bash_seq reg_seq
The sequence used to test one register
virtual task body()
Executes the Register Bit Bash sequence.
protected virtual task do_block(
    uvm_reg_block  blk
)
Test all of the registers in a given block
virtual task reset_blk(
    uvm_reg_block  blk
)
Reset the DUT that corresponds to the specified block abstraction class.