[spi_device] Add Read access to Read buffer in PassThru
This commit adds a test accessing the read buffer while SPI Device is in
the Passthrough mode.
The expected behavior is to not fetch any data from DPSRAM and return
garbage data.
Signed-off-by: Eunchan Kim <eunchan@opentitan.org>
diff --git a/hw/ip/spi_device/pre_dv/tb/spid_readcmd_tb.sv b/hw/ip/spi_device/pre_dv/tb/spid_readcmd_tb.sv
index ea8818a..76b6249 100644
--- a/hw/ip/spi_device/pre_dv/tb/spid_readcmd_tb.sv
+++ b/hw/ip/spi_device/pre_dv/tb/spid_readcmd_tb.sv
@@ -321,12 +321,14 @@
// Issue Read Cmd: Fast Read Buffer Flip
- //=========================================================================
- // Issue Read Cmd: Fast Read to Mailbox
-
// Switch PassThrough mode
->flashmode_done;
+ // Wait till configuration done from SW side
+ repeat(20) @(negedge tb_sif.clk);
+
+ //=========================================================================
+ // Issue Read Cmd: Fast Read to Mailbox
$display("Sending Fast Read Command to Mailbox");
mbx_offset = $urandom_range(0, MailboxSpace -1);
// Check mbx_offset and determine size
@@ -350,6 +352,31 @@
expected_data.delete();
//=========================================================================
+ // Issue Read Cmd to Read buffer space in PassThrough
+ //
+ // Expected: return high-z or X or '0
+ $display("Sending Fast Read to Read Buffer while in PassThrough");
+ spiflash_read(
+ tb_sif,
+ 8'h 0B,
+ $urandom_range(0, MailboxHostAddr-1),
+ 1'b 1,
+ 8,
+ 1,
+ IoSingle,
+ read_data
+ );
+
+ if (! (read_data[0] inside {'hx, 'hz, 'h0}) ) begin
+ $display("Received data is not expected: %x", read_data[0]);
+ match = 1'b 0;
+ end else begin
+ $display("Expected data has been received [%x]", read_data[0]);
+ end
+
+ read_data.delete();
+
+ //=========================================================================
// Issue Read Cmd: Fast Read Mailbox Boundary Crossing
// Complete the simulation
