commit 0c75a15a36e7c4e80e26149936c2b7fa737c2590
author Eunchan Kim <eunchan@opentitan.org> Thu Apr 28 11:03:40 2022 -0700
committer Eli Kim <github@elikim.dev> Mon May 02 13:26:41 2022 -0700
tree 98215d203827dc0a8df70e52cc57324297022e03
parent 6295a31811aa253d26cf1e5d0c1eeb2c9668f471

[spi_device] Add MBX crossing (MBX -> Passthrough)

Add a testcase that issues a read request crossing the mailbox upper
boundary (mbx -> passthrough).

Signed-off-by: Eunchan Kim <eunchan@opentitan.org>

hw/ip/spi_device/pre_dv/tb/spid_readcmd_tb.sv

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 2f31550..554b634 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
@@ -332,7 +332,8 @@
     $display("Sending Fast Read Command to Mailbox");
     mbx_offset = $urandom_range(0, MailboxSpace -1);
     // Check mbx_offset and determine size
-    mbx_reqsize = $urandom_range(1, MailboxSpace - mbx_offset);
+    mbx_reqsize = $urandom_range(1, 255);
+    //mbx_reqsize = $urandom_range(1, MailboxSpace - mbx_offset);
     spiflash_read(
       tb_sif,
       8'h 0B,         // opcode
@@ -404,6 +405,34 @@
     read_data.delete();
     expected_data.delete();
 
+    // 2. Mailbox -> Read buffer
+    $display("Sending Fast Read to Mailbox space crosses the boundary");
+    mbx_offset  = $urandom_range(0, 32);
+    mbx_reqsize = $urandom_range(0, 32);
+    spiflash_read(
+      tb_sif,
+      8'h 0B,
+      MailboxHostAddr + MailboxSpace - mbx_offset,
+      1'b 1,
+      8,
+      mbx_offset + mbx_reqsize,
+      IoSingle,
+      read_data
+    );
+
+    // Drop the end part, Compare MBX only
+    read_data = read_data[0:mbx_offset-1];
+
+    expected_data = get_read_data({SramMailboxIdx, 2'b 00}
+                                  + (MailboxSpace - mbx_offset), mbx_offset);
+
+    match = check_data(read_data, expected_data);
+    if (match == 1'b 0) test_passed = 1'b 0;
+    read_data.delete();
+    expected_data.delete();
+
+    // TODO: Check if flip/ threshold event happens.
+
     // Complete the simulation
     if (test_passed) begin
       $display("TEST PASSED CHECKS");