diff --git a/tools/build/bazel/p4lang_workspace.bzl b/tools/build/bazel/p4lang_workspace.bzl
new file mode 100644
index 0000000..03b4e40
--- /dev/null
+++ b/tools/build/bazel/p4lang_workspace.bzl
@@ -0,0 +1,36 @@
+GITHUB_BASE_URL = "https://github.com"
+
+PI_COMMIT_SHORT = "219b3d6"
+PI_COMMIT = "219b3d67299ec09b49f433d7341049256ab5f512"
+PI_REPO = "p4lang/PI"
+
+GOOGLE_RPC_COMMIT_SHORT = "932f273"
+GOOGLE_RPC_COMMIT = "master"
+GOOGLE_RPC_REPO = "googleapis/googleapis"
+
+def _format_github_url(repo, commit):
+    return GITHUB_BASE_URL + "/{0}/tarball/{1}".format(repo, commit)
+
+def generate_p4lang():
+    native.http_archive(
+        name = "com_google_protobuf",
+        sha256 = "cef7f1b5a7c5fba672bec2a319246e8feba471f04dcebfe362d55930ee7c1c30",
+        strip_prefix = "protobuf-3.5.0",
+        urls = ["https://github.com/google/protobuf/archive/v3.5.0.zip"],
+    )
+
+    native.new_http_archive(
+        name = "p4lang_pi",
+        urls = [_format_github_url(PI_REPO, PI_COMMIT)],
+        build_file = "//tools/build/bazel:p4lang_BUILD",
+        strip_prefix = "p4lang-PI-" + PI_COMMIT_SHORT + "/proto",
+        type = "tar.gz",
+    )
+
+    native.new_http_archive(
+        name = "google_rpc",
+        urls = [_format_github_url(GOOGLE_RPC_REPO, GOOGLE_RPC_COMMIT)],
+        build_file = "//tools/build/bazel:google_RPC_BUILD",
+        strip_prefix = "googleapis-googleapis-" + GOOGLE_RPC_COMMIT_SHORT,
+        type = "tar.gz",
+    )