Writes to memory over AXI, backdoor readback, then AXI readback. More...

Inheritance diagram for axi_sequential_reads_seq:

Collaboration diagram for axi_sequential_reads_seq:

Public Member Functions
	uvm_object_utils (axi_sequential_reads_seq) new(string name

task	body ()
	Does all the work. More...

	uvm_object_utils (axi_seq) const int clearmemory=0

	new (string name="axi_seq")
	Constructor. More...

void	set_transaction_count (int count)
	How many transactions? More...

bit	compare_items (ref axi_seq_item write_item, ref axi_seq_item read_item)
	Compares the write-item with the corresponding read_item. More...

Public Attributes
const int	window_size = 0x1_0000

int	xfers_to_send = 1

bit	valid []

bit< 2:0 >	max_burst_size

int	xfers_done =0

memory	m_memory

Detailed Description

Writes to memory over AXI, backdoor readback, then AXI readback.

miscompares are flagged.

Definition at line 33 of file axi_sequential_reads_seq.svh.

Member Function Documentation

task axi_sequential_reads_seq::body ( )

Does all the work.

Creates constrained random AXI write packet
Sends it
Backdoor read of memory to verify correctly written
Creates constrained random AXI read packet with same len and address as write packet
Sends it
Verifies read back data with written data.

two modes: Serial, Write_addr, then write, then resp. Repeat Parallel - Multiple write_adr, then multiple write_data, then multiple resp, repeat

Definition at line 64 of file axi_sequential_reads_seq.svh.

References axi_seq_item::addr, ADDR_WIDTH, axi_seq_item::burst_size, axi_seq_item::burst_type, calculate_axlen(), axi_seq_item::convert2string(), e_FIXED, e_INCR, e_READ, e_WRAP, ID_WIDTH, axi_seq_item::len, axi_seq::m_memory, memory::seq_item_check(), axi_seq::window_size, memory::write(), axi_seq::xfers_done, and axi_seq::xfers_to_send.

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bit axi_seq::compare_items	(	ref axi_seq_item	write_item,
		ref axi_seq_item	read_item
	)

inherited

Compares the write-item with the corresponding read_item.

THis isn't the same as a do_compare() method in the axi_seq_item because the readback is depenent on which burst_type Although it could probably exist as aseperate method in the seqitem.

Parameters

write_item	- the original item
read_item	- the item after memory readback

Returns: True if no miscompares, false if miscompares

........................

Definition at line 115 of file axi_seq.svh.

References e_FIXED, e_INCR, e_WRAP, and axi_seq::max_burst_size.

axi_seq::new ( string name = "axi_seq" )

inherited

Constructor.

Doesn't actually do anything except call parent constructor

Definition at line 62 of file axi_seq.svh.

References axi_seq::max_burst_size.

void axi_seq::set_transaction_count ( int count )

inherited

How many transactions?

This method sets how many transactions to send (Write Address, Write Data, Write Response) is one traction (Read Address, Read Data) is one transaction

Parameters

count - how many transactions to send

Definition at line 92 of file axi_seq.svh.

References axi_seq::xfers_to_send.

Referenced by axi_base_test::build_phase().

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