[flash_ctrl,dv] hardening read path error injection

Same issue as #19268 has been observed. Hardening error injection.

Signed-off-by: Jaedon Kim <[email protected]>

hw/ip/flash_ctrl/dv/env/seq_lib/flash_ctrl_rd_path_intg_vseq.sv

@@ -10,7 +10,6 @@ class flash_ctrl_rd_path_intg_vseq extends flash_ctrl_legacy_base_vseq;
   `uvm_object_new
 
   task body();
-    int idx1, idx2;
     string path1, path2;
     int    state_timeout_ns = 100000; // 100us
 
@@ -26,17 +25,16 @@ class flash_ctrl_rd_path_intg_vseq extends flash_ctrl_legacy_base_vseq;
       //  hw/ip/flash_ctrl/rtl/flash_phy_rd.sv;drc=8046c2896fa50aaf3a186a7ce8c0570db9f99eaf;l=481)
       // Enable ecc for all regions
       flash_otf_region_cfg(.scr_mode(OTFCfgTrue), .ecc_mode(OTFCfgTrue));
-      idx1 = $urandom_range(0, 63);
-      idx2 = $urandom_range(0, 63);
+      // Set path to subset of both upperword [63:32] and lowerword[31:0]
       path1 = {"tb.dut.u_eflash.gen_flash_cores[0].u_core",
-               $sformatf(".u_rd.gen_bufs[0].u_rd_buf.data_i[%0d]", idx1)};
+               ".u_rd.gen_bufs[0].u_rd_buf.data_i[35:28]"};
       path2 = {"tb.dut.u_eflash.gen_flash_cores[1].u_core",
-               $sformatf(".u_rd.gen_bufs[0].u_rd_buf.data_i[%0d]", idx2)};
+               ".u_rd.gen_bufs[0].u_rd_buf.data_i[35:28]"};
 
       cfg.clk_rst_vif.wait_clks(10);
-      `uvm_info(`gfn, $sformatf("Assert read path err idx1:%0d idx2:%0d", idx1, idx2), UVM_LOW)
-      `DV_CHECK(uvm_hdl_force(path1, 1'b0))
-      `DV_CHECK(uvm_hdl_force(path2, 1'b0))
+
+      `DV_CHECK(uvm_hdl_force(path1, $urandom()))
+      `DV_CHECK(uvm_hdl_force(path2, $urandom()))
       cfg.scb_h.expected_alert["fatal_err"].expected = 1;
       cfg.scb_h.expected_alert["fatal_err"].max_delay = 2000;
       cfg.scb_h.exp_alert_contd["fatal_err"] = 10000;