diff --git a/src/definition/mod.rs b/src/definition/mod.rs
index 781d89a..4b43c3d 100644
--- a/src/definition/mod.rs
+++ b/src/definition/mod.rs
@@ -1,4 +1,4 @@
-use crate::{utils::get_definition_token};
+use crate::utils::get_definition_token;
 use crate::server::LSPServer;
 use crate::sources::LSPSupport;
 
diff --git a/src/definition/vhdl.rs b/src/definition/vhdl.rs
index 399c669..06a423c 100644
--- a/src/definition/vhdl.rs
+++ b/src/definition/vhdl.rs
@@ -1,6 +1,35 @@
-use tower_lsp::lsp_types::*;
-use crate::server::LSPServer;
+use std::{path::PathBuf, str::FromStr};
 
-pub fn goto_vhdl_definition() {
-    
+use log::info;
+use tower_lsp::lsp_types::*;
+use crate::{server::LSPServer, utils::{from_lsp_pos, srcpos_to_location, to_escape_path}};
+
+pub fn goto_vhdl_definition(server: &LSPServer, params: TextDocumentPositionParams) -> Option<Location> {
+    let uri = &params.text_document.uri;
+    let file_id = server.srcs.get_id(&uri).to_owned();
+    server.srcs.wait_parse_ready(file_id, false);
+    let projects = server.srcs.design_file_map.read().ok()?;
+
+    let path = match PathBuf::from_str(uri.path()) {
+        Ok(path) => path,
+        Err(error) => {
+            info!("error happen in <goto_include_definition>: {:?}", error);
+            return None;
+        }
+    };
+    let escape_path = to_escape_path(&path);
+    let escape_path_string = escape_path.to_str().unwrap_or("");
+    if escape_path_string.len() == 0 {
+        info!("error happen in [vhdl_parser_pipeline], escape_path_string is empty");
+        return None;
+    }
+    let project = match projects.get(escape_path_string) {
+        Some(project) => project,
+        None => return None
+    };
+
+    let source = project.get_source(&escape_path)?;
+
+    let ent = project.find_definition(&source, from_lsp_pos(params.position))?;
+    Some(srcpos_to_location(ent.decl_pos()?))
 }
\ No newline at end of file
diff --git a/src/utils/mod.rs b/src/utils/mod.rs
index 823ef49..043344c 100644
--- a/src/utils/mod.rs
+++ b/src/utils/mod.rs
@@ -4,7 +4,7 @@ use percent_encoding::percent_decode_str;
 use regex::Regex;
 use ropey::RopeSlice;
 use tower_lsp::lsp_types::*;
-use vhdl_lang::{ast::ObjectClass, AnyEntKind, Object, Overloaded, Type, Concurrent};
+use vhdl_lang::{ast::ObjectClass, AnyEntKind, Concurrent, Object, Overloaded, SrcPos, Type};
 
 pub mod fast;
 
@@ -252,4 +252,12 @@ pub fn from_lsp_range(range: Range) -> vhdl_lang::Range {
         start: from_lsp_pos(range.start),
         end: from_lsp_pos(range.end),
     }
+}
+
+pub fn srcpos_to_location(pos: &SrcPos) -> Location {
+    let uri = Url::from_file_path(pos.source.file_name()).unwrap();
+    Location {
+        uri,
+        range: to_lsp_range(pos.range()),
+    }
 }
\ No newline at end of file