diff --git a/verilog/dv/Makefile b/verilog/dv/Makefile
index ca64f10..17cd90d 100644
--- a/verilog/dv/Makefile
+++ b/verilog/dv/Makefile
@@ -19,7 +19,7 @@
 .SUFFIXES:
 .SILENT: clean all
 
-PATTERNS = wb_port risc_boot user_risc_boot user_uart user_uart1 user_qspi user_i2cm riscv_regress user_basic user_usb user_pwm user_timer user_uart_master uart_master
+PATTERNS = wb_port risc_boot user_risc_boot user_uart user_uart1 user_qspi user_i2cm riscv_regress user_basic user_usb user_pwm user_timer user_uart_master uart_master user_mcore user_sram_exec
 
 all:  ${PATTERNS}
 	for i in ${PATTERNS}; do \
diff --git a/verilog/dv/firmware/common_bthread.c b/verilog/dv/firmware/common_bthread.c
new file mode 100644
index 0000000..e5508c6
--- /dev/null
+++ b/verilog/dv/firmware/common_bthread.c
@@ -0,0 +1,137 @@
+//========================================================================
+// common-bthread
+//========================================================================
+
+#include "common_bthread.h"
+
+//------------------------------------------------------------------------
+// Global data structures
+//------------------------------------------------------------------------
+
+spawn_func_ptr g_thread_spawn_func_ptrs[4];
+void*          g_thread_spawn_func_args[4];
+
+volatile int   g_thread_flags[4] = {0,0,0,0};
+
+
+//------------------------------------------------------------------------
+// bthread_init
+//------------------------------------------------------------------------
+
+void bthread_init()
+{
+  int core_id = bthread_get_core_id();
+
+  // If it's core zero, fall through
+
+  if ( core_id == 0 ) {
+
+    for ( int i = 0; i < 4; i++ )
+      g_thread_flags[i] = 0;
+
+    // mark core zero to be 1.
+
+    g_thread_flags[0] = 1;
+    return;
+  }
+
+  else {
+
+    // Core 1-3 will wait here in the worker loop
+
+    while (1) {
+
+      // Wait until woken up by core 0. We insert some extra nops here to
+      // avoid banging on the memory system too hard.
+
+      while( g_thread_flags[core_id] == 0 ) {
+        __asm__ __volatile__ ( "nop;"
+                               "nop;"
+                               "nop;"
+                               "nop;"
+                               "nop;"
+                               "nop;"
+                               "nop;"
+                               "nop;"
+                               "nop;"
+                               "nop;": : : "memory" );
+      }
+
+      // Execute the spawn function
+
+      (*g_thread_spawn_func_ptrs[core_id])
+        ( g_thread_spawn_func_args[core_id] );
+
+      // Unset the flag so the master core knows this work core is done.
+
+      g_thread_flags[core_id] = 0;
+
+    }
+
+  }
+}
+
+
+//------------------------------------------------------------------------
+// bthread_spawn
+//------------------------------------------------------------------------
+// Spawn a function to a given worker core (thread). Need to provide:
+//
+//   thread_id     : ID of the thread we are spawning to
+//   start_routine : Spawned function
+//   arg           : A pointer to the argument.
+//
+
+int bthread_spawn( int thread_id, void (*start_routine)(void*), void* arg )
+{
+  int ncores = bthread_get_num_cores();
+
+  // If the master core spawns work onto itself then that is an error.
+
+  if ( thread_id == 0 ) {
+    return -1;
+  }
+
+  // If thread id is too large return an error
+
+  if ( thread_id >= ncores || thread_id < 0 )
+    return -1;
+
+  // Check to see if the thread is already in use. If so, then return
+  // an error.
+
+  if ( g_thread_flags[thread_id] )
+    return -1;
+
+  // Set function and argument pointer
+
+  g_thread_spawn_func_args[thread_id] = arg;
+  g_thread_spawn_func_ptrs[thread_id] = start_routine;
+
+  // Wake up worker thread
+
+  g_thread_flags[thread_id] = 1;
+
+  return 0;
+}
+
+
+//------------------------------------------------------------------------
+// bthread_join
+//------------------------------------------------------------------------
+// Wait for the given thread to finish executing its work.
+
+int bthread_join( int thread_id )
+{
+  // Thread id out of range, return an error.
+
+  if( thread_id < 1 || thread_id >= 4 )
+    return -1;
+
+  // Wait until the given thread is no longer in use.
+
+  while ( g_thread_flags[thread_id] )
+    ;
+
+  return 0;
+}
diff --git a/verilog/dv/firmware/common_bthread.h b/verilog/dv/firmware/common_bthread.h
new file mode 100644
index 0000000..dcadf07
--- /dev/null
+++ b/verilog/dv/firmware/common_bthread.h
@@ -0,0 +1,107 @@
+//========================================================================
+// common-bthread
+//========================================================================
+// We use a very simple "runtime" to parallelize our apps. We called it
+// bthread because it is a set of bare minimum "threading" library
+// functions to parallelize a program across multiple cores.
+//
+// All cores start from the main function. We need to call the
+// bthread_init() function at the beginning of main(). Basically only
+// core 0 can pass through the bthread_init function and continue
+// executing. The rest of cores (if any) will be trapped in the
+// bthread_init() function, waiting in a loop we call the worker loop. In
+// each iteration of the worker loop, a core will check if the flag is
+// set by core 0. If it is, then it will execute the function core 0
+// stored in a shared location, then reset its flag. Cores other than
+// core 0 will stay in the worker loop indefinitely.
+//
+// We call core 0 the master core, and we call the other cores the worker
+// cores. The master core "spawns work" on a worker core using the
+// bthread_spawn function. The master core needs the function pointer,
+// the argument pointer, and a worker core's ID. It stores the function
+// pointer and the argument pointer to a global location, then sets the
+// flag for the given worker core.
+//
+// The master core can wait for a worker core to finish by using the
+// bthread_join function. It waits for a designated worker core until the
+// worker core finishes executing its function (if any) then returns.
+
+#ifndef COMMON_BTHREAD_H
+#define COMMON_BTHREAD_H
+
+//------------------------------------------------------------------------
+// Global data structures
+//------------------------------------------------------------------------
+
+typedef void (*spawn_func_ptr)(void*);
+
+
+extern spawn_func_ptr g_thread_spawn_func_ptrs[4];
+extern void*          g_thread_spawn_func_args[4];
+
+volatile extern int   g_thread_flags[4];
+
+
+//------------------------------------------------------------------------
+// bthread_get_num_cores
+//------------------------------------------------------------------------
+// Returns the number of cores.
+
+inline
+int bthread_get_num_cores()
+{
+  int num_cores;
+  asm( "csrr %0, 0xFC1;"
+       : "=r"(num_cores)
+       :
+  );
+  return num_cores;
+}
+
+
+//------------------------------------------------------------------------
+// bthread_get_core_id
+//------------------------------------------------------------------------
+// Returns the core ID.
+
+inline
+int bthread_get_core_id()
+{
+  int core_id;
+  asm( "csrr %0, 0xF14;"
+       : "=r"(core_id)
+       :
+  );
+  return core_id;
+}
+
+
+//------------------------------------------------------------------------
+// bthread_init
+//------------------------------------------------------------------------
+// This function _MUST_ be called right at the beginning of the main().
+// It will only let core 0 pass through. All other cores will be trapped
+// in a worker loop, waiting be woken up by the core 0 (bthread_spawn).
+
+void bthread_init();
+
+//------------------------------------------------------------------------
+// bthread_spawn
+//------------------------------------------------------------------------
+// Spawn a function to a given worker core (thread). Need to provide:
+//
+//   thread_id     : ID of the thread we are spawning to
+//   start_routine : Spawned function
+//   arg           : A pointer to the argument.
+//
+
+int bthread_spawn( int thread_id, void (*start_routine)(void*), void* arg );
+
+//------------------------------------------------------------------------
+// bthread_join
+//------------------------------------------------------------------------
+// Wait for the given thread to finish executing its work.
+
+int bthread_join( int thread_id );
+
+#endif /* COMMON_BTHREAD_H */
diff --git a/verilog/dv/firmware/common_misc.h b/verilog/dv/firmware/common_misc.h
new file mode 100644
index 0000000..8556c35
--- /dev/null
+++ b/verilog/dv/firmware/common_misc.h
@@ -0,0 +1,97 @@
+//========================================================================
+// common-misc
+//========================================================================
+
+#ifndef COMMON_MISC_H
+#define COMMON_MISC_H
+
+#include <stdio.h>
+#include <stdlib.h>
+
+//------------------------------------------------------------------------
+// Typedefs
+//------------------------------------------------------------------------
+
+typedef unsigned char byte;
+typedef unsigned int  uint;
+
+//------------------------------------------------------------------------
+// exit
+//------------------------------------------------------------------------
+// exit the program with the given status code
+
+
+inline
+void exit( int i )
+{
+  int msg = 0x00010000 | i;
+  asm ( "csrw 0x7C0, %0;" :: "r"(msg) );
+}
+
+
+//------------------------------------------------------------------------
+// test_fail
+//------------------------------------------------------------------------
+
+
+inline
+void test_fail( int index, int val, int ref )
+{
+  int status = 0x00020001;
+  asm( "csrw 0x7C0, %0;"
+       "csrw 0x7C0, %1;"
+       "csrw 0x7C0, %2;"
+       "csrw 0x7C0, %3;"
+       :
+       : "r" (status), "r" (index), "r" (val), "r" (ref)
+  );
+}
+
+
+//------------------------------------------------------------------------
+// test_pass
+//------------------------------------------------------------------------
+
+
+inline
+void test_pass()
+{
+  int status = 0x00020000;
+  asm( "csrw 0x7C0, %0;"
+       :
+       : "r" (status)
+  );
+}
+
+//------------------------------------------------------------------------
+// test_stats_on
+//------------------------------------------------------------------------
+
+
+inline
+void test_stats_on()
+{
+  int status = 1;
+  asm( "csrw 0x7C1, %0;"
+       :
+       : "r" (status)
+  );
+}
+
+
+//------------------------------------------------------------------------
+// test_stats_off
+//------------------------------------------------------------------------
+
+inline
+void test_stats_off()
+{
+  int status = 0;
+  asm( "csrw 0x7C1, %0;"
+       :
+       : "r" (status)
+  );
+}
+
+#endif /* COMMON_MISC_H */
+
diff --git a/verilog/dv/user_mcore/Makefile b/verilog/dv/user_mcore/Makefile
new file mode 100644
index 0000000..a7d9f3f
--- /dev/null
+++ b/verilog/dv/user_mcore/Makefile
@@ -0,0 +1,91 @@
+# SPDX-FileCopyrightText: 2020 Efabless Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+
+# ---- Include Partitioned Makefiles ----
+
+CONFIG = caravel_user_project
+ 
+#######################################################################
+## Caravel Verilog for Integration Tests
+#######################################################################
+
+DESIGNS?=../../..
+
+export USER_PROJECT_VERILOG ?=  $(DESIGNS)/verilog
+## YIFIVE FIRMWARE
+YIFIVE_FIRMWARE_PATH = $(USER_PROJECT_VERILOG)/dv/firmware
+GCC64_PREFIX?=riscv64-unknown-elf
+
+
+## Simulation mode: RTL/GL
+SIM?=RTL
+DUMP?=OFF
+RISC_CORE?=15
+
+### To Enable IVERILOG FST DUMP
+export IVERILOG_DUMPER = fst
+
+
+.SUFFIXES:
+
+PATTERN = user_mcore
+
+all:  ${PATTERN:=.vcd}
+
+
+vvp:  ${PATTERN:=.vvp}
+
+%.vvp: %_tb.v
+	${GCC64_PREFIX}-gcc -O2 -funroll-loops -fpeel-loops -fgcse-sm -fgcse-las  -D__RVC_EXT -static -std=gnu99 -fno-common -fno-builtin-printf -DTCM=0 -Wa,-march=rv32imc -march=rv32imc -mabi=ilp32 -DFLAGS_STR=\""-O2 -funroll-loops -fpeel-loops -fgcse-sm -fgcse-las "\"  -c -I./ -I$(YIFIVE_FIRMWARE_PATH)  user_mcore.c -o user_mcore.o
+	${GCC64_PREFIX}-gcc -O2 -funroll-loops -fpeel-loops -fgcse-sm -fgcse-las  -D__RVC_EXT -static -std=gnu99 -fno-common -fno-builtin-printf -DTCM=0 -Wa,-march=rv32imc -march=rv32imc -mabi=ilp32 -DFLAGS_STR=\""-O2 -funroll-loops -fpeel-loops -fgcse-sm -fgcse-las "\"  -c -I./ -I$(YIFIVE_FIRMWARE_PATH)  $(YIFIVE_FIRMWARE_PATH)/common_bthread.c -o common_bthread.o
+	${GCC64_PREFIX}-gcc -O2 -funroll-loops -fpeel-loops -fgcse-sm -fgcse-las  -D__RVC_EXT -static -std=gnu99 -fno-common -fno-builtin-printf -DTCM=0 -Wa,-march=rv32imc -march=rv32imc -mabi=ilp32 -DFLAGS_STR=\""-O2 -funroll-loops -fpeel-loops -fgcse-sm -fgcse-las "\"  -D__ASSEMBLY__=1 -c -I./ -I$(YIFIVE_FIRMWARE_PATH)  $(YIFIVE_FIRMWARE_PATH)/crt.S -o crt.o
+	${GCC64_PREFIX}-gcc -o user_mcore.elf -T $(YIFIVE_FIRMWARE_PATH)/link.ld user_mcore.o crt.o common_bthread.o -nostartfiles -nostdlib -lc -lgcc -march=rv32imc -mabi=ilp32 -N
+	${GCC64_PREFIX}-objcopy -O verilog user_mcore.elf user_mcore.hex
+	${GCC64_PREFIX}-objdump -D user_mcore.elf > user_mcore.dump
+	rm crt.o user_mcore.o
+ifeq ($(SIM),RTL)
+   ifeq ($(DUMP),OFF)
+	iverilog -g2012 -DFUNCTIONAL -DSIM -I $(PDK_PATH) \
+	-f$(USER_PROJECT_VERILOG)/includes/includes.rtl.$(CONFIG) \
+	$< -o $@ 
+    else  
+	iverilog -g2012 -DWFDUMP -DFUNCTIONAL -DSIM -I $(PDK_PATH) \
+	-f$(USER_PROJECT_VERILOG)/includes/includes.rtl.$(CONFIG) \
+	$< -o $@ 
+   endif
+else  
+   ifeq ($(DUMP),OFF)
+	iverilog -g2012 -DFUNCTIONAL -DUSE_POWER_PINS -DGL -I $(PDK_PATH) \
+	-f$(USER_PROJECT_VERILOG)/includes/includes.gl.$(CONFIG) \
+	$< -o $@ 
+    else  
+	iverilog -g2012 -DWFDUMP -DFUNCTIONAL -DUSE_POWER_PINS -DGL -I $(PDK_PATH) \
+	-f$(USER_PROJECT_VERILOG)/includes/includes.gl.$(CONFIG) \
+	$< -o $@ 
+   endif
+endif
+
+%.vcd: %.vvp
+	vvp $< +risc_core_id=$(RISC_CORE)
+
+
+# ---- Clean ----
+
+clean:
+	rm -f *.elf *.hex *.bin *.vvp *.vcd *.log *.o *.dump
+
+.PHONY: clean hex all
diff --git a/verilog/dv/user_mcore/user_mcore.c b/verilog/dv/user_mcore/user_mcore.c
new file mode 100644
index 0000000..dc1899d
--- /dev/null
+++ b/verilog/dv/user_mcore/user_mcore.c
@@ -0,0 +1,176 @@
+/*
+ * SPDX-FileCopyrightText: 2020 Efabless Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+
+#include "common_misc.h"
+#include "common_bthread.h"
+
+#define SC_SIM_OUTPORT (0xf0000000)
+#define uint32_t  long
+#define uint16_t  int
+#define size      10
+
+#define reg_mprj_globl_reg0  (*(volatile uint32_t*)0x10020000)
+#define reg_mprj_globl_reg1  (*(volatile uint32_t*)0x10020004)
+#define reg_mprj_globl_reg2  (*(volatile uint32_t*)0x10020008)
+#define reg_mprj_globl_reg3  (*(volatile uint32_t*)0x1002000C)
+#define reg_mprj_globl_reg4  (*(volatile uint32_t*)0x10020010)
+#define reg_mprj_globl_reg5  (*(volatile uint32_t*)0x10020014)
+#define reg_mprj_globl_reg6  (*(volatile uint32_t*)0x10020018)
+#define reg_mprj_globl_reg7  (*(volatile uint32_t*)0x1002001C)
+#define reg_mprj_globl_reg8  (*(volatile uint32_t*)0x10020020)
+#define reg_mprj_globl_reg9  (*(volatile uint32_t*)0x10020024)
+#define reg_mprj_globl_reg10 (*(volatile uint32_t*)0x10020028)
+#define reg_mprj_globl_reg11 (*(volatile uint32_t*)0x1002002C)
+#define reg_mprj_globl_reg12 (*(volatile uint32_t*)0x10020030)
+#define reg_mprj_globl_reg13 (*(volatile uint32_t*)0x10020034)
+#define reg_mprj_globl_reg14 (*(volatile uint32_t*)0x10020038)
+#define reg_mprj_globl_reg15 (*(volatile uint32_t*)0x1002003C)
+#define reg_mprj_globl_reg16 (*(volatile uint32_t*)0x10020040)
+#define reg_mprj_globl_reg17 (*(volatile uint32_t*)0x10020044)
+#define reg_mprj_globl_reg18 (*(volatile uint32_t*)0x10020048)
+#define reg_mprj_globl_reg19 (*(volatile uint32_t*)0x1002004C)
+#define reg_mprj_globl_reg20 (*(volatile uint32_t*)0x10020050)
+#define reg_mprj_globl_reg21 (*(volatile uint32_t*)0x10020054)
+#define reg_mprj_globl_reg22 (*(volatile uint32_t*)0x10020058)
+#define reg_mprj_globl_reg23 (*(volatile uint32_t*)0x1002005C)
+#define reg_mprj_globl_reg24 (*(volatile uint32_t*)0x10020060)
+#define reg_mprj_globl_reg25 (*(volatile uint32_t*)0x10020064)
+#define reg_mprj_globl_reg26 (*(volatile uint32_t*)0x10020068)
+#define reg_mprj_globl_reg27 (*(volatile uint32_t*)0x1002006C)
+// -------------------------------------------------------------------------
+// Multi-core test, Two Array is filled with below data, destination hold sum
+//      source           result            remark
+//   src0    src1        dest              
+//   0x0000    0x00000000      0x00000000            updated by core-0
+//   0x1111    0x11110000      0x11111111            updated by core-0
+//   0x2222    0x22220000      0x22222222            updated by core-0
+//   0x3333    0x33330000      0x33333333            updated by core-0
+//   0x4444    0x44440000      0x44444444            updated by core-1
+//   0x5555    0x55550000      0x55555555            updated by core-1
+//   0x6666    0x66660000      0x66666666            updated by core-1
+//   0x7777    0x77770000      0x77777777            updated by core-1
+//                                   
+//   0x8888    0x88880000      0x88888888            updated by core-2
+//   0x9999    0x99990000      0x99999999            updated by core-2
+//   0xAAAA    0xAAAA0000      0xAAAAAAAA            updated by core-2
+//   0xBBBB    0xBBBB0000      0xBBBBBBBB            updated by core-2
+//   0xCCCC    0xCCCC0000      0xCCCCCCCC            updated by core-3
+//   0xDDDD    0xDDDD0000      0xDDDDDDDD            updated by core-3
+//   0xEEEE    0xEEEE0000      0xEEEEEEEE            updated by core-3
+//   0xFFFF    0xFFFF0000      0xFFFFFFFF            updated by core-3
+//
+// -------------------------------------------------------------------------
+
+typedef struct {
+    int* dest; // pointer to dest array
+    int* src0; // pointer to src0 array
+    int* src1; // pointer to src1 array
+    int begin; // first element this core should process
+    int end; // (one past) last element this core should process
+} arg_t;
+
+
+void vvadd_mt(void* arg_vptr )
+ {
+
+   // Cast void* to argument pointer.
+   arg_t* arg_ptr = (arg_t*) arg_vptr;
+   // Create local variables for each field of the argument structure.
+   int* dest = arg_ptr->dest;
+   int* src0 = arg_ptr->src0;
+   int* src1 = arg_ptr->src1;
+   int begin = arg_ptr->begin;
+   int end = arg_ptr->end;
+
+   // Do the actual work.
+   for ( int i = begin; i < end; i++ ) {
+      dest[i] = src0[i] + src1[i];
+   }
+
+ }
+
+ #define buf_size 16
+
+ int main( int argc, char* argv[] )
+ {
+
+       int dest[buf_size];
+       int src0[buf_size];
+       int src1[buf_size];
+       char test_pass = 0x1;
+
+       for ( int i = 0; i < buf_size; i++ ) {
+          src0[i] = 0x1111 * (i); 
+	  src1[i] = 0x11110000 * (i);
+       }
+
+       // Create two argument structures that include the array pointers and
+       // what elements each core should process.
+       arg_t arg0 = { dest, src0, src1, 0, buf_size/4 };
+       arg_t arg1 = { dest, src0, src1, buf_size/4, buf_size/2 };
+       arg_t arg2 = { dest, src0, src1, buf_size/2, (3*buf_size)/4 };
+       arg_t arg3 = { dest, src0, src1, (3*buf_size)/4, buf_size };
+
+       reg_mprj_globl_reg22  = 0x11223344;  // Sig-1
+       // Initialize bare threads (bthread).
+       bthread_init();
+      
+      
+       reg_mprj_globl_reg23  = 0x22334455;  // Sig-2
+       // Start counting stats.
+       //test_stats_on();
+      
+
+       // Spawn work onto core 1
+       bthread_spawn( 1, &vvadd_mt, &arg1 );
+       bthread_spawn( 2, &vvadd_mt, &arg2 );
+       bthread_spawn( 3, &vvadd_mt, &arg3 );
+      
+       reg_mprj_globl_reg24  = 0x33445566;  // Sig-3
+       // Have core 0 also do some work.
+       vvadd_mt(&arg0);
+      
+       reg_mprj_globl_reg25  = 0x44556677;  // Sig-4
+       // Wait for core 1 to finish.
+       bthread_join(1);
+       bthread_join(2);
+       bthread_join(3);
+
+
+       // Stop counting stats
+       //test_stats_off();
+       reg_mprj_globl_reg26 = 0x55667788;  // sig-5
+      
+       // Core 0 will verify the results.
+       if ( bthread_get_core_id() == 0 ) {
+
+	   // Check the Expected Data
+           for ( int i = 0; i < buf_size; i++ ) {
+              if(dest[i] != (src0[i] + src1[i]))
+            	test_pass &= 0;
+           }
+	   if(test_pass == 0x1) {
+               reg_mprj_globl_reg27 = 0x66778899;  // sig-6
+	   }
+
+       }
+      
+       return 0;
+ }
+
+
diff --git a/verilog/dv/user_mcore/user_mcore_tb.v b/verilog/dv/user_mcore/user_mcore_tb.v
new file mode 100644
index 0000000..797002f
--- /dev/null
+++ b/verilog/dv/user_mcore/user_mcore_tb.v
@@ -0,0 +1,424 @@
+////////////////////////////////////////////////////////////////////////////
+// SPDX-FileCopyrightText:  2021 , Dinesh Annayya
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileContributor: Modified by Dinesh Annayya <dinesha@opencores.org>
+//////////////////////////////////////////////////////////////////////
+////                                                              ////
+////  Standalone User validation Test bench                       ////
+////                                                              ////
+////  This file is part of the riscduino cores project            ////
+////                                                              ////
+////  Description                                                 ////
+////   This is a standalone test bench to validate the            ////
+////   Digital core multi-core behaviour.                         ////
+////                                                              ////
+////  To Do:                                                      ////
+////    nothing                                                   ////
+////                                                              ////
+////  Author(s):                                                  ////
+////      - Dinesh Annayya, dinesha@opencores.org                 ////
+////                                                              ////
+////  Revision :                                                  ////
+////    0.1 - 16th Feb 2021, Dinesh A                             ////
+////                                                              ////
+//////////////////////////////////////////////////////////////////////
+////                                                              ////
+//// Copyright (C) 2000 Authors and OPENCORES.ORG                 ////
+////                                                              ////
+//// This source file may be used and distributed without         ////
+//// restriction provided that this copyright statement is not    ////
+//// removed from the file and that any derivative work contains  ////
+//// the original copyright notice and the associated disclaimer. ////
+////                                                              ////
+//// This source file is free software; you can redistribute it   ////
+//// and/or modify it under the terms of the GNU Lesser General   ////
+//// Public License as published by the Free Software Foundation; ////
+//// either version 2.1 of the License, or (at your option) any   ////
+//// later version.                                               ////
+////                                                              ////
+//// This source is distributed in the hope that it will be       ////
+//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
+//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
+//// PURPOSE.  See the GNU Lesser General Public License for more ////
+//// details.                                                     ////
+////                                                              ////
+//// You should have received a copy of the GNU Lesser General    ////
+//// Public License along with this source; if not, download it   ////
+//// from http://www.opencores.org/lgpl.shtml                     ////
+////                                                              ////
+//////////////////////////////////////////////////////////////////////
+
+`default_nettype wire
+
+`timescale 1 ns / 1 ns
+
+`include "sram_macros/sky130_sram_2kbyte_1rw1r_32x512_8.v"
+module user_mcore_tb;
+	reg clock;
+	reg wb_rst_i;
+	reg power1, power2;
+	reg power3, power4;
+
+        reg        wbd_ext_cyc_i;  // strobe/request
+        reg        wbd_ext_stb_i;  // strobe/request
+        reg [31:0] wbd_ext_adr_i;  // address
+        reg        wbd_ext_we_i;  // write
+        reg [31:0] wbd_ext_dat_i;  // data output
+        reg [3:0]  wbd_ext_sel_i;  // byte enable
+
+        wire [31:0] wbd_ext_dat_o;  // data input
+        wire        wbd_ext_ack_o;  // acknowlegement
+        wire        wbd_ext_err_o;  // error
+
+	// User I/O
+	wire [37:0] io_oeb;
+	wire [37:0] io_out;
+	wire [37:0] io_in;
+
+	wire gpio;
+	wire [37:0] mprj_io;
+	wire [7:0] mprj_io_0;
+	reg         test_fail;
+	reg [31:0] read_data;
+	integer    d_risc_id;
+
+
+
+	// External clock is used by default.  Make this artificially fast for the
+	// simulation.  Normally this would be a slow clock and the digital PLL
+	// would be the fast clock.
+
+	always #12.5 clock <= (clock === 1'b0);
+
+	initial begin
+		clock = 0;
+                wbd_ext_cyc_i ='h0;  // strobe/request
+                wbd_ext_stb_i ='h0;  // strobe/request
+                wbd_ext_adr_i ='h0;  // address
+                wbd_ext_we_i  ='h0;  // write
+                wbd_ext_dat_i ='h0;  // data output
+                wbd_ext_sel_i ='h0;  // byte enable
+	end
+
+	`ifdef WFDUMP
+	   initial begin
+	   	$dumpfile("simx.vcd");
+	   	$dumpvars(1, user_mcore_tb);
+	   	$dumpvars(1, user_mcore_tb.u_top);
+	   	$dumpvars(0, user_mcore_tb.u_top.u_riscv_top);
+	   end
+       `endif
+
+	initial begin
+
+		$value$plusargs("risc_core_id=%d", d_risc_id);
+
+		#200; // Wait for reset removal
+	        repeat (10) @(posedge clock);
+		$display("Monitor: Standalone User Risc Boot Test Started");
+
+		// Remove Wb Reset
+		wb_user_core_write(`ADDR_SPACE_WBHOST+`WBHOST_GLBL_CFG,'h1);
+
+	        repeat (2) @(posedge clock);
+		#1;
+		// Remove all the reset
+		if(d_risc_id == 0) begin
+		     $display("STATUS: Working with Risc core 0");
+                     wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GBL_CFG0,'h11F);
+		end else if(d_risc_id == 1) begin
+		     $display("STATUS: Working with Risc core 1");
+                     wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GBL_CFG0,'h21F);
+		end else if(d_risc_id == 2) begin
+		     $display("STATUS: Working with Risc core 2");
+                     wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GBL_CFG0,'h41F);
+		end else if(d_risc_id == 3) begin
+		     $display("STATUS: Working with Risc core 2");
+                     wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GBL_CFG0,'h81F);
+		end else begin
+		     $display("STATUS: Working with Both core Risc core 0/1/2/3 ");
+                     wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GBL_CFG0,'hF1F);
+		end
+
+
+		// Repeat cycles of 1000 clock edges as needed to complete testbench
+		repeat (26) begin
+			repeat (1000) @(posedge clock);
+			// $display("+1000 cycles");
+		end
+
+
+		$display("Monitor: Reading Back the expected value");
+		// User RISC core expect to write these value in global
+		// register, read back and decide on pass fail
+		// 0x30000018  = 0x11223344; 
+                // 0x3000001C  = 0x22334455; 
+                // 0x30000020  = 0x33445566; 
+                // 0x30000024  = 0x44556677; 
+                // 0x30000028 = 0x55667788; 
+                // 0x3000002C = 0x66778899; 
+
+                test_fail = 0;
+		wb_user_core_read_check(`ADDR_SPACE_PINMUX+`PINMUX_SOFT_REG_1,read_data,32'h11223344);
+		wb_user_core_read_check(`ADDR_SPACE_PINMUX+`PINMUX_SOFT_REG_2,read_data,32'h22334455);
+		wb_user_core_read_check(`ADDR_SPACE_PINMUX+`PINMUX_SOFT_REG_3,read_data,32'h33445566);
+		wb_user_core_read_check(`ADDR_SPACE_PINMUX+`PINMUX_SOFT_REG_4,read_data,32'h44556677);
+		wb_user_core_read_check(`ADDR_SPACE_PINMUX+`PINMUX_SOFT_REG_5,read_data,32'h55667788);
+		wb_user_core_read_check(`ADDR_SPACE_PINMUX+`PINMUX_SOFT_REG_6,read_data,32'h66778899);
+
+
+	   
+	    	$display("###################################################");
+          	if(test_fail == 0) begin
+		   `ifdef GL
+	    	       $display("Monitor: Standalone User Risc Boot (GL) Passed");
+		   `else
+		       $display("Monitor: Standalone User Risc Boot (RTL) Passed");
+		   `endif
+	        end else begin
+		    `ifdef GL
+	    	        $display("Monitor: Standalone User Risc Boot (GL) Failed");
+		    `else
+		        $display("Monitor: Standalone User Risc Boot (RTL) Failed");
+		    `endif
+		 end
+	    	$display("###################################################");
+	    $finish;
+	end
+
+	initial begin
+		wb_rst_i <= 1'b1;
+		#100;
+		wb_rst_i <= 1'b0;	    	// Release reset
+	end
+wire USER_VDD1V8 = 1'b1;
+wire VSS = 1'b0;
+
+user_project_wrapper u_top(
+`ifdef USE_POWER_PINS
+    .vccd1(USER_VDD1V8),	// User area 1 1.8V supply
+    .vssd1(VSS),	// User area 1 digital ground
+`endif
+    .wb_clk_i        (clock),  // System clock
+    .user_clock2     (1'b1),  // Real-time clock
+    .wb_rst_i        (wb_rst_i),  // Regular Reset signal
+
+    .wbs_cyc_i   (wbd_ext_cyc_i),  // strobe/request
+    .wbs_stb_i   (wbd_ext_stb_i),  // strobe/request
+    .wbs_adr_i   (wbd_ext_adr_i),  // address
+    .wbs_we_i    (wbd_ext_we_i),  // write
+    .wbs_dat_i   (wbd_ext_dat_i),  // data output
+    .wbs_sel_i   (wbd_ext_sel_i),  // byte enable
+
+    .wbs_dat_o   (wbd_ext_dat_o),  // data input
+    .wbs_ack_o   (wbd_ext_ack_o),  // acknowlegement
+
+ 
+    // Logic Analyzer Signals
+    .la_data_in      ('1) ,
+    .la_data_out     (),
+    .la_oenb         ('0),
+ 
+
+    // IOs
+    .io_in          (io_in)  ,
+    .io_out         (io_out) ,
+    .io_oeb         (io_oeb) ,
+
+    .user_irq       () 
+
+);
+
+`ifndef GL // Drive Power for Hold Fix Buf
+    // All standard cell need power hook-up for functionality work
+    initial begin
+
+    end
+`endif    
+
+//------------------------------------------------------
+//  Integrate the Serial flash with qurd support to
+//  user core using the gpio pads
+//  ----------------------------------------------------
+
+   wire flash_clk = io_out[24];
+   wire flash_csb = io_out[25];
+   // Creating Pad Delay
+   wire #1 io_oeb_29 = io_oeb[29];
+   wire #1 io_oeb_30 = io_oeb[30];
+   wire #1 io_oeb_31 = io_oeb[31];
+   wire #1 io_oeb_32 = io_oeb[32];
+   tri  #1 flash_io0 = (io_oeb_29== 1'b0) ? io_out[29] : 1'bz;
+   tri  #1 flash_io1 = (io_oeb_30== 1'b0) ? io_out[30] : 1'bz;
+   tri  #1 flash_io2 = (io_oeb_31== 1'b0) ? io_out[31] : 1'bz;
+   tri  #1 flash_io3 = (io_oeb_32== 1'b0) ? io_out[32] : 1'bz;
+
+   assign io_in[29] = flash_io0;
+   assign io_in[30] = flash_io1;
+   assign io_in[31] = flash_io2;
+   assign io_in[32] = flash_io3;
+
+   // Quard flash
+     s25fl256s #(.mem_file_name("user_mcore.hex"),
+	         .otp_file_name("none"),
+                 .TimingModel("S25FL512SAGMFI010_F_30pF")) 
+		 u_spi_flash_256mb (
+           // Data Inputs/Outputs
+       .SI      (flash_io0),
+       .SO      (flash_io1),
+       // Controls
+       .SCK     (flash_clk),
+       .CSNeg   (flash_csb),
+       .WPNeg   (flash_io2),
+       .HOLDNeg (flash_io3),
+       .RSTNeg  (!wb_rst_i)
+
+       );
+
+
+
+
+task wb_user_core_write;
+input [31:0] address;
+input [31:0] data;
+begin
+  repeat (1) @(posedge clock);
+  #1;
+  wbd_ext_adr_i =address;  // address
+  wbd_ext_we_i  ='h1;  // write
+  wbd_ext_dat_i =data;  // data output
+  wbd_ext_sel_i ='hF;  // byte enable
+  wbd_ext_cyc_i ='h1;  // strobe/request
+  wbd_ext_stb_i ='h1;  // strobe/request
+  wait(wbd_ext_ack_o == 1);
+  repeat (1) @(posedge clock);
+  #1;
+  wbd_ext_cyc_i ='h0;  // strobe/request
+  wbd_ext_stb_i ='h0;  // strobe/request
+  wbd_ext_adr_i ='h0;  // address
+  wbd_ext_we_i  ='h0;  // write
+  wbd_ext_dat_i ='h0;  // data output
+  wbd_ext_sel_i ='h0;  // byte enable
+  $display("DEBUG WB USER ACCESS WRITE Address : %x, Data : %x",address,data);
+  repeat (2) @(posedge clock);
+end
+endtask
+
+task  wb_user_core_read;
+input [31:0] address;
+output [31:0] data;
+reg    [31:0] data;
+begin
+  repeat (1) @(posedge clock);
+  #1;
+  wbd_ext_adr_i =address;  // address
+  wbd_ext_we_i  ='h0;  // write
+  wbd_ext_dat_i ='0;  // data output
+  wbd_ext_sel_i ='hF;  // byte enable
+  wbd_ext_cyc_i ='h1;  // strobe/request
+  wbd_ext_stb_i ='h1;  // strobe/request
+  wait(wbd_ext_ack_o == 1);
+  repeat (1) @(negedge clock);
+  data  = wbd_ext_dat_o;  
+  repeat (1) @(posedge clock);
+  #1;
+  wbd_ext_cyc_i ='h0;  // strobe/request
+  wbd_ext_stb_i ='h0;  // strobe/request
+  wbd_ext_adr_i ='h0;  // address
+  wbd_ext_we_i  ='h0;  // write
+  wbd_ext_dat_i ='h0;  // data output
+  wbd_ext_sel_i ='h0;  // byte enable
+  $display("DEBUG WB USER ACCESS READ Address : %x, Data : %x",address,data);
+  repeat (2) @(posedge clock);
+end
+endtask
+
+task  wb_user_core_read_check;
+input [31:0] address;
+output [31:0] data;
+input [31:0] cmp_data;
+reg    [31:0] data;
+begin
+  repeat (1) @(posedge clock);
+  #1;
+  wbd_ext_adr_i =address;  // address
+  wbd_ext_we_i  ='h0;  // write
+  wbd_ext_dat_i ='0;  // data output
+  wbd_ext_sel_i ='hF;  // byte enable
+  wbd_ext_cyc_i ='h1;  // strobe/request
+  wbd_ext_stb_i ='h1;  // strobe/request
+  wait(wbd_ext_ack_o == 1);
+  repeat (1) @(negedge clock);
+  data  = wbd_ext_dat_o;  
+  repeat (1) @(posedge clock);
+  #1;
+  wbd_ext_cyc_i ='h0;  // strobe/request
+  wbd_ext_stb_i ='h0;  // strobe/request
+  wbd_ext_adr_i ='h0;  // address
+  wbd_ext_we_i  ='h0;  // write
+  wbd_ext_dat_i ='h0;  // data output
+  wbd_ext_sel_i ='h0;  // byte enable
+  if(data !== cmp_data) begin
+     $display("ERROR : WB USER ACCESS READ  Address : 0x%x, Exd: 0x%x Rxd: 0x%x ",address,cmp_data,data);
+     test_fail = 1;
+  end else begin
+     $display("STATUS: WB USER ACCESS READ  Address : 0x%x, Data : 0x%x",address,data);
+  end
+  repeat (2) @(posedge clock);
+end
+endtask
+
+`ifdef GL
+
+wire        wbd_spi_stb_i   = u_top.u_qspi_master.wbd_stb_i;
+wire        wbd_spi_ack_o   = u_top.u_qspi_master.wbd_ack_o;
+wire        wbd_spi_we_i    = u_top.u_qspi_master.wbd_we_i;
+wire [31:0] wbd_spi_adr_i   = u_top.u_qspi_master.wbd_adr_i;
+wire [31:0] wbd_spi_dat_i   = u_top.u_qspi_master.wbd_dat_i;
+wire [31:0] wbd_spi_dat_o   = u_top.u_qspi_master.wbd_dat_o;
+wire [3:0]  wbd_spi_sel_i   = u_top.u_qspi_master.wbd_sel_i;
+
+wire        wbd_uart_stb_i  = u_top.u_uart_i2c_usb_spi.reg_cs;
+wire        wbd_uart_ack_o  = u_top.u_uart_i2c_usb_spi.reg_ack;
+wire        wbd_uart_we_i   = u_top.u_uart_i2c_usb_spi.reg_wr;
+wire [8:0]  wbd_uart_adr_i  = u_top.u_uart_i2c_usb_spi.reg_addr;
+wire [7:0]  wbd_uart_dat_i  = u_top.u_uart_i2c_usb_spi.reg_wdata;
+wire [7:0]  wbd_uart_dat_o  = u_top.u_uart_i2c_usb_spi.reg_rdata;
+wire        wbd_uart_sel_i  = u_top.u_uart_i2c_usb_spi.reg_be;
+
+`endif
+
+/**
+`ifdef GL
+//-----------------------------------------------------------------------------
+// RISC IMEM amd DMEM Monitoring TASK
+//-----------------------------------------------------------------------------
+
+`define RISC_CORE  user_uart_tb.u_top.u_core.u_riscv_top
+
+always@(posedge `RISC_CORE.wb_clk) begin
+    if(`RISC_CORE.wbd_imem_ack_i)
+          $display("RISCV-DEBUG => IMEM ADDRESS: %x Read Data : %x", `RISC_CORE.wbd_imem_adr_o,`RISC_CORE.wbd_imem_dat_i);
+    if(`RISC_CORE.wbd_dmem_ack_i && `RISC_CORE.wbd_dmem_we_o)
+          $display("RISCV-DEBUG => DMEM ADDRESS: %x Write Data: %x Resonse: %x", `RISC_CORE.wbd_dmem_adr_o,`RISC_CORE.wbd_dmem_dat_o);
+    if(`RISC_CORE.wbd_dmem_ack_i && !`RISC_CORE.wbd_dmem_we_o)
+          $display("RISCV-DEBUG => DMEM ADDRESS: %x READ Data : %x Resonse: %x", `RISC_CORE.wbd_dmem_adr_o,`RISC_CORE.wbd_dmem_dat_i);
+end
+
+`endif
+**/
+endmodule
+`include "s25fl256s.sv"
+`default_nettype wire
diff --git a/verilog/dv/user_sram_exec/Makefile b/verilog/dv/user_sram_exec/Makefile
new file mode 100644
index 0000000..b0f31fc
--- /dev/null
+++ b/verilog/dv/user_sram_exec/Makefile
@@ -0,0 +1,90 @@
+# SPDX-FileCopyrightText: 2020 Efabless Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+
+# ---- Include Partitioned Makefiles ----
+
+CONFIG = caravel_user_project
+ 
+#######################################################################
+## Caravel Verilog for Integration Tests
+#######################################################################
+
+DESIGNS?=../../..
+
+export USER_PROJECT_VERILOG ?=  $(DESIGNS)/verilog
+## YIFIVE FIRMWARE
+YIFIVE_FIRMWARE_PATH = $(USER_PROJECT_VERILOG)/dv/firmware
+GCC64_PREFIX?=riscv64-unknown-elf
+
+
+## Simulation mode: RTL/GL
+SIM?=RTL
+DUMP?=OFF
+RISC_CORE?=0
+
+### To Enable IVERILOG FST DUMP
+export IVERILOG_DUMPER = fst
+
+
+.SUFFIXES:
+
+PATTERN = user_sram_exec
+
+all:  ${PATTERN:=.vcd}
+
+
+vvp:  ${PATTERN:=.vvp}
+
+%.vvp: %_tb.v
+	${GCC64_PREFIX}-gcc -O2 -funroll-loops -fpeel-loops -fgcse-sm -fgcse-las  -D__RVC_EXT -static -std=gnu99 -fno-common -fno-builtin-printf -DTCM=0 -Wa,-march=rv32imc -march=rv32imc -mabi=ilp32 -DFLAGS_STR=\""-O2 -funroll-loops -fpeel-loops -fgcse-sm -fgcse-las "\"  -c -I./ -I$(YIFIVE_FIRMWARE_PATH)  user_sram_exec.c -o user_sram_exec.o
+	${GCC64_PREFIX}-gcc -O2 -funroll-loops -fpeel-loops -fgcse-sm -fgcse-las  -D__RVC_EXT -static -std=gnu99 -fno-common -fno-builtin-printf -DTCM=0 -Wa,-march=rv32imc -march=rv32imc -mabi=ilp32 -DFLAGS_STR=\""-O2 -funroll-loops -fpeel-loops -fgcse-sm -fgcse-las "\"  -D__ASSEMBLY__=1 -c -I./ -I$(YIFIVE_FIRMWARE_PATH)  $(YIFIVE_FIRMWARE_PATH)/crt.S -o crt.o
+	${GCC64_PREFIX}-gcc -o user_sram_exec.elf -T $(YIFIVE_FIRMWARE_PATH)/link.ld user_sram_exec.o crt.o -nostartfiles -nostdlib -lc -lgcc -march=rv32imc -mabi=ilp32 -N
+	${GCC64_PREFIX}-objcopy -O verilog user_sram_exec.elf user_sram_exec.hex
+	${GCC64_PREFIX}-objdump -D user_sram_exec.elf > user_sram_exec.dump
+	rm crt.o user_sram_exec.o
+ifeq ($(SIM),RTL)
+   ifeq ($(DUMP),OFF)
+	iverilog -g2012 -DFUNCTIONAL -DSIM -I $(PDK_PATH) \
+	-f$(USER_PROJECT_VERILOG)/includes/includes.rtl.$(CONFIG) \
+	$< -o $@ 
+    else  
+	iverilog -g2012 -DWFDUMP -DFUNCTIONAL -DSIM -I $(PDK_PATH) \
+	-f$(USER_PROJECT_VERILOG)/includes/includes.rtl.$(CONFIG) \
+	$< -o $@ 
+   endif
+else  
+   ifeq ($(DUMP),OFF)
+	iverilog -g2012 -DFUNCTIONAL -DUSE_POWER_PINS -DGL -I $(PDK_PATH) \
+	-f$(USER_PROJECT_VERILOG)/includes/includes.gl.$(CONFIG) \
+	$< -o $@ 
+    else  
+	iverilog -g2012 -DWFDUMP -DFUNCTIONAL -DUSE_POWER_PINS -DGL -I $(PDK_PATH) \
+	-f$(USER_PROJECT_VERILOG)/includes/includes.gl.$(CONFIG) \
+	$< -o $@ 
+   endif
+endif
+
+%.vcd: %.vvp
+	vvp $< +risc_core_id=$(RISC_CORE)
+
+
+# ---- Clean ----
+
+clean:
+	rm -f *.elf *.hex *.bin *.vvp *.vcd *.log *.dump
+
+.PHONY: clean hex all
diff --git a/verilog/dv/user_sram_exec/user_sram_exec.c b/verilog/dv/user_sram_exec/user_sram_exec.c
new file mode 100644
index 0000000..62546a8
--- /dev/null
+++ b/verilog/dv/user_sram_exec/user_sram_exec.c
@@ -0,0 +1,88 @@
+/*
+ * SPDX-FileCopyrightText: 2020 Efabless Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+
+#define SC_SIM_OUTPORT (0xf0000000)
+#define uint32_t  long
+#define uint16_t  int
+
+#define reg_mprj_globl_reg0  (*(volatile uint32_t*)0x10020000)
+#define reg_mprj_globl_reg1  (*(volatile uint32_t*)0x10020004)
+#define reg_mprj_globl_reg2  (*(volatile uint32_t*)0x10020008)
+#define reg_mprj_globl_reg3  (*(volatile uint32_t*)0x1002000C)
+#define reg_mprj_globl_reg4  (*(volatile uint32_t*)0x10020010)
+#define reg_mprj_globl_reg5  (*(volatile uint32_t*)0x10020014)
+#define reg_mprj_globl_reg6  (*(volatile uint32_t*)0x10020018)
+#define reg_mprj_globl_reg7  (*(volatile uint32_t*)0x1002001C)
+#define reg_mprj_globl_reg8  (*(volatile uint32_t*)0x10020020)
+#define reg_mprj_globl_reg9  (*(volatile uint32_t*)0x10020024)
+#define reg_mprj_globl_reg10 (*(volatile uint32_t*)0x10020028)
+#define reg_mprj_globl_reg11 (*(volatile uint32_t*)0x1002002C)
+#define reg_mprj_globl_reg12 (*(volatile uint32_t*)0x10020030)
+#define reg_mprj_globl_reg13 (*(volatile uint32_t*)0x10020034)
+#define reg_mprj_globl_reg14 (*(volatile uint32_t*)0x10020038)
+#define reg_mprj_globl_reg15 (*(volatile uint32_t*)0x1002003C)
+#define reg_mprj_globl_reg16 (*(volatile uint32_t*)0x10020040)
+#define reg_mprj_globl_reg17 (*(volatile uint32_t*)0x10020044)
+#define reg_mprj_globl_reg18 (*(volatile uint32_t*)0x10020048)
+#define reg_mprj_globl_reg19 (*(volatile uint32_t*)0x1002004C)
+#define reg_mprj_globl_reg20 (*(volatile uint32_t*)0x10020050)
+#define reg_mprj_globl_reg21 (*(volatile uint32_t*)0x10020054)
+#define reg_mprj_globl_reg22 (*(volatile uint32_t*)0x10020058)
+#define reg_mprj_globl_reg23 (*(volatile uint32_t*)0x1002005C)
+#define reg_mprj_globl_reg24 (*(volatile uint32_t*)0x10020060)
+#define reg_mprj_globl_reg25 (*(volatile uint32_t*)0x10020064)
+#define reg_mprj_globl_reg26 (*(volatile uint32_t*)0x10020068)
+#define reg_mprj_globl_reg27 (*(volatile uint32_t*)0x1002006C)
+// -------------------------------------------------------------------------
+// Test copying code into SRAM and running it from there.
+// -------------------------------------------------------------------------
+
+void test_function()
+{
+    reg_mprj_globl_reg24  = 0x33445566;  // Sig-3
+    reg_mprj_globl_reg25  = 0x44556677;  // Sig-4
+
+    return;
+}
+
+void main()
+{
+    uint16_t func[&main - &test_function];
+    uint16_t *src_ptr;
+    uint16_t *dst_ptr;
+
+
+    src_ptr = &test_function;
+    dst_ptr = func;
+
+    reg_mprj_globl_reg22  = 0x11223344;  // Sig-1
+    while (src_ptr < &main) {
+	*(dst_ptr++) = *(src_ptr++);
+    }
+
+    // Call the routine in SRAM
+    reg_mprj_globl_reg23  = 0x22334455;  // Sig-2
+    
+    ((void(*)())func)();
+
+    reg_mprj_globl_reg26 = 0x55667788; 
+    reg_mprj_globl_reg27 = 0x66778899; 
+
+    // Signal end of test
+}
+
diff --git a/verilog/dv/user_sram_exec/user_sram_exec_tb.v b/verilog/dv/user_sram_exec/user_sram_exec_tb.v
new file mode 100644
index 0000000..2aaad02
--- /dev/null
+++ b/verilog/dv/user_sram_exec/user_sram_exec_tb.v
@@ -0,0 +1,415 @@
+////////////////////////////////////////////////////////////////////////////
+// SPDX-FileCopyrightText:  2021 , Dinesh Annayya
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileContributor: Modified by Dinesh Annayya <dinesha@opencores.org>
+//////////////////////////////////////////////////////////////////////
+////                                                              ////
+////  Standalone User validation Test bench                       ////
+////                                                              ////
+////  This file is part of the Riscduino cores project            ////
+////                                                              ////
+////  Description                                                 ////
+////   This is a standalone test bench to validate the            ////
+////   Digital core with Risc core executing code from TCM/SRAM.  ////
+////                                                              ////
+////  To Do:                                                      ////
+////    nothing                                                   ////
+////                                                              ////
+////  Author(s):                                                  ////
+////      - Dinesh Annayya, dinesha@opencores.org                 ////
+////                                                              ////
+////  Revision :                                                  ////
+////    0.1 - 16th Feb 2021, Dinesh A                             ////
+////                                                              ////
+//////////////////////////////////////////////////////////////////////
+////                                                              ////
+//// Copyright (C) 2000 Authors and OPENCORES.ORG                 ////
+////                                                              ////
+//// This source file may be used and distributed without         ////
+//// restriction provided that this copyright statement is not    ////
+//// removed from the file and that any derivative work contains  ////
+//// the original copyright notice and the associated disclaimer. ////
+////                                                              ////
+//// This source file is free software; you can redistribute it   ////
+//// and/or modify it under the terms of the GNU Lesser General   ////
+//// Public License as published by the Free Software Foundation; ////
+//// either version 2.1 of the License, or (at your option) any   ////
+//// later version.                                               ////
+////                                                              ////
+//// This source is distributed in the hope that it will be       ////
+//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////
+//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////
+//// PURPOSE.  See the GNU Lesser General Public License for more ////
+//// details.                                                     ////
+////                                                              ////
+//// You should have received a copy of the GNU Lesser General    ////
+//// Public License along with this source; if not, download it   ////
+//// from http://www.opencores.org/lgpl.shtml                     ////
+////                                                              ////
+//////////////////////////////////////////////////////////////////////
+
+`default_nettype wire
+
+`timescale 1 ns / 1 ns
+
+`include "sram_macros/sky130_sram_2kbyte_1rw1r_32x512_8.v"
+module user_sram_exec_tb;
+	reg clock;
+	reg wb_rst_i;
+	reg power1, power2;
+	reg power3, power4;
+
+        reg        wbd_ext_cyc_i;  // strobe/request
+        reg        wbd_ext_stb_i;  // strobe/request
+        reg [31:0] wbd_ext_adr_i;  // address
+        reg        wbd_ext_we_i;  // write
+        reg [31:0] wbd_ext_dat_i;  // data output
+        reg [3:0]  wbd_ext_sel_i;  // byte enable
+
+        wire [31:0] wbd_ext_dat_o;  // data input
+        wire        wbd_ext_ack_o;  // acknowlegement
+        wire        wbd_ext_err_o;  // error
+
+	// User I/O
+	wire [37:0] io_oeb;
+	wire [37:0] io_out;
+	wire [37:0] io_in;
+
+	wire gpio;
+	wire [37:0] mprj_io;
+	wire [7:0] mprj_io_0;
+	reg         test_fail;
+	reg [31:0] read_data;
+	integer    d_risc_id;
+
+
+
+	// External clock is used by default.  Make this artificially fast for the
+	// simulation.  Normally this would be a slow clock and the digital PLL
+	// would be the fast clock.
+
+	always #12.5 clock <= (clock === 1'b0);
+
+	initial begin
+		clock = 0;
+                wbd_ext_cyc_i ='h0;  // strobe/request
+                wbd_ext_stb_i ='h0;  // strobe/request
+                wbd_ext_adr_i ='h0;  // address
+                wbd_ext_we_i  ='h0;  // write
+                wbd_ext_dat_i ='h0;  // data output
+                wbd_ext_sel_i ='h0;  // byte enable
+	end
+
+	`ifdef WFDUMP
+	   initial begin
+	   	$dumpfile("simx.vcd");
+	   	$dumpvars(1, user_sram_exec_tb);
+	   	$dumpvars(1, user_sram_exec_tb.u_top);
+	   	$dumpvars(0, user_sram_exec_tb.u_top.u_riscv_top);
+	   end
+       `endif
+
+	initial begin
+
+		$value$plusargs("risc_core_id=%d", d_risc_id);
+
+		#200; // Wait for reset removal
+	        repeat (10) @(posedge clock);
+		$display("Monitor: Standalone User Risc Boot Test Started");
+
+		// Remove Wb Reset
+		wb_user_core_write(`ADDR_SPACE_WBHOST+`WBHOST_GLBL_CFG,'h1);
+
+	        repeat (2) @(posedge clock);
+		#1;
+		// Remove all the reset
+		if(d_risc_id == 0) begin
+		     $display("STATUS: Working with Risc core 0");
+                     wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GBL_CFG0,'h11F);
+		end else begin
+		     $display("STATUS: Working with Risc core 1");
+                     wb_user_core_write(`ADDR_SPACE_PINMUX+`PINMUX_GBL_CFG0,'h21F);
+		end
+
+
+		// Repeat cycles of 1000 clock edges as needed to complete testbench
+		repeat (30) begin
+			repeat (1000) @(posedge clock);
+			// $display("+1000 cycles");
+		end
+
+
+		$display("Monitor: Reading Back the expected value");
+		// User RISC core expect to write these value in global
+		// register, read back and decide on pass fail
+		// 0x30000018  = 0x11223344; 
+                // 0x3000001C  = 0x22334455; 
+                // 0x30000020  = 0x33445566; 
+                // 0x30000024  = 0x44556677; 
+                // 0x30000028 = 0x55667788; 
+                // 0x3000002C = 0x66778899; 
+
+                test_fail = 0;
+		wb_user_core_read_check(`ADDR_SPACE_PINMUX+`PINMUX_SOFT_REG_1,read_data,32'h11223344);
+		wb_user_core_read_check(`ADDR_SPACE_PINMUX+`PINMUX_SOFT_REG_2,read_data,32'h22334455);
+		wb_user_core_read_check(`ADDR_SPACE_PINMUX+`PINMUX_SOFT_REG_3,read_data,32'h33445566);
+		wb_user_core_read_check(`ADDR_SPACE_PINMUX+`PINMUX_SOFT_REG_4,read_data,32'h44556677);
+		wb_user_core_read_check(`ADDR_SPACE_PINMUX+`PINMUX_SOFT_REG_5,read_data,32'h55667788);
+		wb_user_core_read_check(`ADDR_SPACE_PINMUX+`PINMUX_SOFT_REG_6,read_data,32'h66778899);
+
+
+	   
+	    	$display("###################################################");
+          	if(test_fail == 0) begin
+		   `ifdef GL
+	    	       $display("Monitor: Standalone User Risc Boot (GL) Passed");
+		   `else
+		       $display("Monitor: Standalone User Risc Boot (RTL) Passed");
+		   `endif
+	        end else begin
+		    `ifdef GL
+	    	        $display("Monitor: Standalone User Risc Boot (GL) Failed");
+		    `else
+		        $display("Monitor: Standalone User Risc Boot (RTL) Failed");
+		    `endif
+		 end
+	    	$display("###################################################");
+	    $finish;
+	end
+
+	initial begin
+		wb_rst_i <= 1'b1;
+		#100;
+		wb_rst_i <= 1'b0;	    	// Release reset
+	end
+wire USER_VDD1V8 = 1'b1;
+wire VSS = 1'b0;
+
+user_project_wrapper u_top(
+`ifdef USE_POWER_PINS
+    .vccd1(USER_VDD1V8),	// User area 1 1.8V supply
+    .vssd1(VSS),	// User area 1 digital ground
+`endif
+    .wb_clk_i        (clock),  // System clock
+    .user_clock2     (1'b1),  // Real-time clock
+    .wb_rst_i        (wb_rst_i),  // Regular Reset signal
+
+    .wbs_cyc_i   (wbd_ext_cyc_i),  // strobe/request
+    .wbs_stb_i   (wbd_ext_stb_i),  // strobe/request
+    .wbs_adr_i   (wbd_ext_adr_i),  // address
+    .wbs_we_i    (wbd_ext_we_i),  // write
+    .wbs_dat_i   (wbd_ext_dat_i),  // data output
+    .wbs_sel_i   (wbd_ext_sel_i),  // byte enable
+
+    .wbs_dat_o   (wbd_ext_dat_o),  // data input
+    .wbs_ack_o   (wbd_ext_ack_o),  // acknowlegement
+
+ 
+    // Logic Analyzer Signals
+    .la_data_in      ('1) ,
+    .la_data_out     (),
+    .la_oenb         ('0),
+ 
+
+    // IOs
+    .io_in          (io_in)  ,
+    .io_out         (io_out) ,
+    .io_oeb         (io_oeb) ,
+
+    .user_irq       () 
+
+);
+
+`ifndef GL // Drive Power for Hold Fix Buf
+    // All standard cell need power hook-up for functionality work
+    initial begin
+
+    end
+`endif    
+
+//------------------------------------------------------
+//  Integrate the Serial flash with qurd support to
+//  user core using the gpio pads
+//  ----------------------------------------------------
+
+   wire flash_clk = io_out[24];
+   wire flash_csb = io_out[25];
+   // Creating Pad Delay
+   wire #1 io_oeb_29 = io_oeb[29];
+   wire #1 io_oeb_30 = io_oeb[30];
+   wire #1 io_oeb_31 = io_oeb[31];
+   wire #1 io_oeb_32 = io_oeb[32];
+   tri  #1 flash_io0 = (io_oeb_29== 1'b0) ? io_out[29] : 1'bz;
+   tri  #1 flash_io1 = (io_oeb_30== 1'b0) ? io_out[30] : 1'bz;
+   tri  #1 flash_io2 = (io_oeb_31== 1'b0) ? io_out[31] : 1'bz;
+   tri  #1 flash_io3 = (io_oeb_32== 1'b0) ? io_out[32] : 1'bz;
+
+   assign io_in[29] = flash_io0;
+   assign io_in[30] = flash_io1;
+   assign io_in[31] = flash_io2;
+   assign io_in[32] = flash_io3;
+
+   // Quard flash
+     s25fl256s #(.mem_file_name("user_sram_exec.hex"),
+	         .otp_file_name("none"),
+                 .TimingModel("S25FL512SAGMFI010_F_30pF")) 
+		 u_spi_flash_256mb (
+           // Data Inputs/Outputs
+       .SI      (flash_io0),
+       .SO      (flash_io1),
+       // Controls
+       .SCK     (flash_clk),
+       .CSNeg   (flash_csb),
+       .WPNeg   (flash_io2),
+       .HOLDNeg (flash_io3),
+       .RSTNeg  (!wb_rst_i)
+
+       );
+
+
+
+
+task wb_user_core_write;
+input [31:0] address;
+input [31:0] data;
+begin
+  repeat (1) @(posedge clock);
+  #1;
+  wbd_ext_adr_i =address;  // address
+  wbd_ext_we_i  ='h1;  // write
+  wbd_ext_dat_i =data;  // data output
+  wbd_ext_sel_i ='hF;  // byte enable
+  wbd_ext_cyc_i ='h1;  // strobe/request
+  wbd_ext_stb_i ='h1;  // strobe/request
+  wait(wbd_ext_ack_o == 1);
+  repeat (1) @(posedge clock);
+  #1;
+  wbd_ext_cyc_i ='h0;  // strobe/request
+  wbd_ext_stb_i ='h0;  // strobe/request
+  wbd_ext_adr_i ='h0;  // address
+  wbd_ext_we_i  ='h0;  // write
+  wbd_ext_dat_i ='h0;  // data output
+  wbd_ext_sel_i ='h0;  // byte enable
+  $display("DEBUG WB USER ACCESS WRITE Address : %x, Data : %x",address,data);
+  repeat (2) @(posedge clock);
+end
+endtask
+
+task  wb_user_core_read;
+input [31:0] address;
+output [31:0] data;
+reg    [31:0] data;
+begin
+  repeat (1) @(posedge clock);
+  #1;
+  wbd_ext_adr_i =address;  // address
+  wbd_ext_we_i  ='h0;  // write
+  wbd_ext_dat_i ='0;  // data output
+  wbd_ext_sel_i ='hF;  // byte enable
+  wbd_ext_cyc_i ='h1;  // strobe/request
+  wbd_ext_stb_i ='h1;  // strobe/request
+  wait(wbd_ext_ack_o == 1);
+  repeat (1) @(negedge clock);
+  data  = wbd_ext_dat_o;  
+  repeat (1) @(posedge clock);
+  #1;
+  wbd_ext_cyc_i ='h0;  // strobe/request
+  wbd_ext_stb_i ='h0;  // strobe/request
+  wbd_ext_adr_i ='h0;  // address
+  wbd_ext_we_i  ='h0;  // write
+  wbd_ext_dat_i ='h0;  // data output
+  wbd_ext_sel_i ='h0;  // byte enable
+  $display("DEBUG WB USER ACCESS READ Address : %x, Data : %x",address,data);
+  repeat (2) @(posedge clock);
+end
+endtask
+
+task  wb_user_core_read_check;
+input [31:0] address;
+output [31:0] data;
+input [31:0] cmp_data;
+reg    [31:0] data;
+begin
+  repeat (1) @(posedge clock);
+  #1;
+  wbd_ext_adr_i =address;  // address
+  wbd_ext_we_i  ='h0;  // write
+  wbd_ext_dat_i ='0;  // data output
+  wbd_ext_sel_i ='hF;  // byte enable
+  wbd_ext_cyc_i ='h1;  // strobe/request
+  wbd_ext_stb_i ='h1;  // strobe/request
+  wait(wbd_ext_ack_o == 1);
+  repeat (1) @(negedge clock);
+  data  = wbd_ext_dat_o;  
+  repeat (1) @(posedge clock);
+  #1;
+  wbd_ext_cyc_i ='h0;  // strobe/request
+  wbd_ext_stb_i ='h0;  // strobe/request
+  wbd_ext_adr_i ='h0;  // address
+  wbd_ext_we_i  ='h0;  // write
+  wbd_ext_dat_i ='h0;  // data output
+  wbd_ext_sel_i ='h0;  // byte enable
+  if(data !== cmp_data) begin
+     $display("ERROR : WB USER ACCESS READ  Address : 0x%x, Exd: 0x%x Rxd: 0x%x ",address,cmp_data,data);
+     test_fail = 1;
+  end else begin
+     $display("STATUS: WB USER ACCESS READ  Address : 0x%x, Data : 0x%x",address,data);
+  end
+  repeat (2) @(posedge clock);
+end
+endtask
+
+`ifdef GL
+
+wire        wbd_spi_stb_i   = u_top.u_qspi_master.wbd_stb_i;
+wire        wbd_spi_ack_o   = u_top.u_qspi_master.wbd_ack_o;
+wire        wbd_spi_we_i    = u_top.u_qspi_master.wbd_we_i;
+wire [31:0] wbd_spi_adr_i   = u_top.u_qspi_master.wbd_adr_i;
+wire [31:0] wbd_spi_dat_i   = u_top.u_qspi_master.wbd_dat_i;
+wire [31:0] wbd_spi_dat_o   = u_top.u_qspi_master.wbd_dat_o;
+wire [3:0]  wbd_spi_sel_i   = u_top.u_qspi_master.wbd_sel_i;
+
+wire        wbd_uart_stb_i  = u_top.u_uart_i2c_usb_spi.reg_cs;
+wire        wbd_uart_ack_o  = u_top.u_uart_i2c_usb_spi.reg_ack;
+wire        wbd_uart_we_i   = u_top.u_uart_i2c_usb_spi.reg_wr;
+wire [8:0]  wbd_uart_adr_i  = u_top.u_uart_i2c_usb_spi.reg_addr;
+wire [7:0]  wbd_uart_dat_i  = u_top.u_uart_i2c_usb_spi.reg_wdata;
+wire [7:0]  wbd_uart_dat_o  = u_top.u_uart_i2c_usb_spi.reg_rdata;
+wire        wbd_uart_sel_i  = u_top.u_uart_i2c_usb_spi.reg_be;
+
+`endif
+
+/**
+`ifdef GL
+//-----------------------------------------------------------------------------
+// RISC IMEM amd DMEM Monitoring TASK
+//-----------------------------------------------------------------------------
+
+`define RISC_CORE  user_uart_tb.u_top.u_core.u_riscv_top
+
+always@(posedge `RISC_CORE.wb_clk) begin
+    if(`RISC_CORE.wbd_imem_ack_i)
+          $display("RISCV-DEBUG => IMEM ADDRESS: %x Read Data : %x", `RISC_CORE.wbd_imem_adr_o,`RISC_CORE.wbd_imem_dat_i);
+    if(`RISC_CORE.wbd_dmem_ack_i && `RISC_CORE.wbd_dmem_we_o)
+          $display("RISCV-DEBUG => DMEM ADDRESS: %x Write Data: %x Resonse: %x", `RISC_CORE.wbd_dmem_adr_o,`RISC_CORE.wbd_dmem_dat_o);
+    if(`RISC_CORE.wbd_dmem_ack_i && !`RISC_CORE.wbd_dmem_we_o)
+          $display("RISCV-DEBUG => DMEM ADDRESS: %x READ Data : %x Resonse: %x", `RISC_CORE.wbd_dmem_adr_o,`RISC_CORE.wbd_dmem_dat_i);
+end
+
+`endif
+**/
+endmodule
+`include "s25fl256s.sv"
+`default_nettype wire