diff --git a/core/Makefile b/core/Makefile
index 4aebf6db6..6db288ea1 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -83,7 +83,7 @@ test: ## run unit tests
 	cd tests ; ./run_tests.sh $(TESTOPTS)
 
 test_rust: ## run rs unit tests
-	cd embed/rust ; cargo test --no-default-features --features model_t$(shell echo $(TREZOR_MODEL) | tr "T" "t"),test,ui,ui_debug -- --test-threads=1
+	cd embed/rust ; cargo test --no-default-features --features model_t$(shell echo $(TREZOR_MODEL) | tr "TR" "tr"),test -- --test-threads=1
 
 test_emu: ## run selected device tests from python-trezor
 	$(EMU_TEST) $(PYTEST) $(TESTPATH)/device_tests $(TESTOPTS)
diff --git a/core/SConscript.firmware b/core/SConscript.firmware
index 34cdd72d5..b0bbcbb31 100644
--- a/core/SConscript.firmware
+++ b/core/SConscript.firmware
@@ -704,18 +704,14 @@ def cargo_build():
         profile = '--release'
     else:
         profile = ''
-    if TREZOR_MODEL in ("1",):
-        features = ["model_t1"]
-    elif TREZOR_MODEL in ("R",):
-        features = ["model_tr"]
-    else:
-        features = ["model_tt"]
-    if BITCOIN_ONLY == "1":
-        features.append("bitcoin_only")
+
+    features = ['micropython', 'protobuf', f'model_t{TREZOR_MODEL.lower()}']
+    if BITCOIN_ONLY == '1':
+        features.append('bitcoin_only')
     if UI2:
-        features.append("ui")
-        if PYOPT == "0":
-            features.append("ui_debug")
+        features.append('ui')
+        if PYOPT == '0':
+            features.append('ui_debug')
 
     return f'cd embed/rust; cargo build {profile} --target={RUST_TARGET} --target-dir=../../build/firmware/rust --no-default-features --features "{" ".join(features)}"'
 
diff --git a/core/SConscript.unix b/core/SConscript.unix
index 2784656b8..c25358d8c 100644
--- a/core/SConscript.unix
+++ b/core/SConscript.unix
@@ -665,18 +665,13 @@ RUST_LIB = 'trezor_lib'
 RUST_LIBPATH = f'{RUST_LIBDIR}/lib{RUST_LIB}.a'
 
 def cargo_build():
-    if TREZOR_MODEL in ('1',):
-        features = ["model_t1"]
-    elif TREZOR_MODEL in ('R',):
-        features = ["model_tr"]
-    else:
-        features = ["model_tt"]
-    if BITCOIN_ONLY == "1":
-        features.append("bitcoin_only")
+    features = ['micropython', 'protobuf', f'model_t{TREZOR_MODEL.lower()}']
+    if BITCOIN_ONLY == '1':
+        features.append('bitcoin_only')
     if UI2:
-        features.append("ui")
-        if PYOPT == "0" or not FROZEN:
-            features.append("ui_debug")
+        features.append('ui')
+        if PYOPT == '0':
+            features.append('ui_debug')
 
     return f'cd embed/rust; cargo build --profile {RUST_PROFILE} --target-dir=../../build/unix/rust --no-default-features --features "{" ".join(features)}"'
 
diff --git a/core/embed/rust/Cargo.toml b/core/embed/rust/Cargo.toml
index 3adfdaf2c..fe0295ad3 100644
--- a/core/embed/rust/Cargo.toml
+++ b/core/embed/rust/Cargo.toml
@@ -11,12 +11,14 @@ bitcoin_only = []
 model_tt = ["touch"]
 model_t1 = ["buttons"]
 model_tr = ["buttons"]
+micropython = []
+protobuf = ["micropython"]
 ui = []
 ui_debug = []
 buttons = []
 touch = []
 clippy = []
-test = ["cc", "glob"]
+test = ["cc", "glob", "micropython", "protobuf", "ui", "ui_debug"]
 
 [lib]
 crate-type = ["staticlib"]
diff --git a/core/embed/rust/build.rs b/core/embed/rust/build.rs
index 6e13ff9c2..7d5d59eef 100644
--- a/core/embed/rust/build.rs
+++ b/core/embed/rust/build.rs
@@ -3,7 +3,9 @@ use std::ffi::OsStr;
 use std::{env, path::PathBuf, process::Command};
 
 fn main() {
+    #[cfg(feature = "micropython")]
     generate_qstr_bindings();
+    #[cfg(feature = "micropython")]
     generate_micropython_bindings();
     generate_trezorhal_bindings();
     #[cfg(feature = "test")]
@@ -18,6 +20,7 @@ fn model() -> String {
 }
 
 /// Generates Rust module that exports QSTR constants used in firmware.
+#[cfg(feature = "micropython")]
 fn generate_qstr_bindings() {
     let out_path = env::var("OUT_DIR").unwrap();
 
@@ -117,6 +120,7 @@ fn prepare_bindings() -> bindgen::Builder {
         .parse_callbacks(Box::new(bindgen::CargoCallbacks))
 }
 
+#[cfg(feature = "micropython")]
 fn generate_micropython_bindings() {
     let out_path = env::var("OUT_DIR").unwrap();
 
@@ -269,7 +273,10 @@ fn generate_trezorhal_bindings() {
         .allowlist_function("slip39_word_completion_mask")
         .allowlist_function("button_sequence_to_word")
         // random
-        .allowlist_function("random_uniform");
+        .allowlist_function("random_uniform")
+        // time
+        .allowlist_function("hal_delay")
+        .allowlist_function("hal_ticks_ms");
 
     // Write the bindings to a file in the OUR_DIR.
     bindings
diff --git a/core/embed/rust/src/error.rs b/core/embed/rust/src/error.rs
index fcc0ac137..13e278603 100644
--- a/core/embed/rust/src/error.rs
+++ b/core/embed/rust/src/error.rs
@@ -1,7 +1,11 @@
-use core::convert::{Infallible, TryInto};
+use core::{
+    convert::{Infallible, TryInto},
+    num::TryFromIntError,
+};
 
 use cstr_core::CStr;
 
+#[cfg(feature = "micropython")]
 use crate::micropython::{ffi, obj::Obj, qstr::Qstr};
 
 #[allow(clippy::enum_variant_names)] // We mimic the Python exception classnames here.
@@ -11,13 +15,19 @@ pub enum Error {
     OutOfRange,
     MissingKwargs,
     AllocationFailed,
+    #[cfg(feature = "micropython")]
     CaughtException(Obj),
+    #[cfg(feature = "micropython")]
     KeyError(Obj),
+    #[cfg(feature = "micropython")]
     AttributeError(Qstr),
+    #[cfg(feature = "micropython")]
     ValueError(&'static CStr),
+    #[cfg(feature = "micropython")]
     ValueErrorParam(&'static CStr, Obj),
 }
 
+#[cfg(feature = "micropython")]
 impl Error {
     /// Create an exception instance matching the error code. The result of this
     /// call should only be used to immediately raise the exception, because the
@@ -67,3 +77,9 @@ impl From<Infallible> for Error {
         unreachable!()
     }
 }
+
+impl From<TryFromIntError> for Error {
+    fn from(_: TryFromIntError) -> Self {
+        Self::OutOfRange
+    }
+}
diff --git a/core/embed/rust/src/lib.rs b/core/embed/rust/src/lib.rs
index 2fc1779b0..a79fdab42 100644
--- a/core/embed/rust/src/lib.rs
+++ b/core/embed/rust/src/lib.rs
@@ -5,8 +5,10 @@
 #![allow(dead_code)]
 
 mod error;
+#[cfg(feature = "micropython")]
 #[macro_use]
 mod micropython;
+#[cfg(feature = "protobuf")]
 mod protobuf;
 mod time;
 #[cfg(feature = "ui_debug")]
@@ -16,7 +18,6 @@ mod trezorhal;
 #[cfg(feature = "ui")]
 #[macro_use]
 pub mod ui;
-mod util;
 
 #[cfg(not(test))]
 #[cfg(any(not(feature = "test"), feature = "clippy"))]
diff --git a/core/embed/rust/src/micropython/mod.rs b/core/embed/rust/src/micropython/mod.rs
index 4849d57f5..68659e800 100644
--- a/core/embed/rust/src/micropython/mod.rs
+++ b/core/embed/rust/src/micropython/mod.rs
@@ -16,6 +16,7 @@ pub mod qstr;
 pub mod runtime;
 pub mod time;
 pub mod typ;
+pub mod util;
 
 #[cfg(test)]
 pub mod testutil;
diff --git a/core/embed/rust/src/micropython/obj.rs b/core/embed/rust/src/micropython/obj.rs
index 9cd027cd0..616ce81f6 100644
--- a/core/embed/rust/src/micropython/obj.rs
+++ b/core/embed/rust/src/micropython/obj.rs
@@ -1,7 +1,4 @@
-use core::{
-    convert::{TryFrom, TryInto},
-    num::TryFromIntError,
-};
+use core::convert::{TryFrom, TryInto};
 
 use cstr_core::CStr;
 
@@ -413,9 +410,3 @@ impl Obj {
         }
     }
 }
-
-impl From<TryFromIntError> for Error {
-    fn from(_: TryFromIntError) -> Self {
-        Self::OutOfRange
-    }
-}
diff --git a/core/embed/rust/src/util.rs b/core/embed/rust/src/micropython/util.rs
similarity index 89%
rename from core/embed/rust/src/util.rs
rename to core/embed/rust/src/micropython/util.rs
index 885b72220..caa2ae2d3 100644
--- a/core/embed/rust/src/util.rs
+++ b/core/embed/rust/src/micropython/util.rs
@@ -81,16 +81,3 @@ pub unsafe fn try_with_args_and_kwargs_inline(
     };
     unsafe { try_or_raise(block) }
 }
-
-pub trait ResultExt {
-    fn assert_if_debugging_ui(self, message: &str);
-}
-
-impl<T, E> ResultExt for Result<T, E> {
-    fn assert_if_debugging_ui(self, #[allow(unused)] message: &str) {
-        #[cfg(feature = "ui_debug")]
-        if self.is_err() {
-            panic!("{}", message);
-        }
-    }
-}
diff --git a/core/embed/rust/src/protobuf/decode.rs b/core/embed/rust/src/protobuf/decode.rs
index c2d78c5e7..8566a78d4 100644
--- a/core/embed/rust/src/protobuf/decode.rs
+++ b/core/embed/rust/src/protobuf/decode.rs
@@ -5,8 +5,7 @@ use core::{
 
 use crate::{
     error::Error,
-    micropython::{buffer::Buffer, gc::Gc, list::List, map::Map, obj::Obj, qstr::Qstr},
-    util,
+    micropython::{buffer::Buffer, gc::Gc, list::List, map::Map, obj::Obj, qstr::Qstr, util},
 };
 
 use super::{
diff --git a/core/embed/rust/src/protobuf/encode.rs b/core/embed/rust/src/protobuf/encode.rs
index a1330802e..90690ec3b 100644
--- a/core/embed/rust/src/protobuf/encode.rs
+++ b/core/embed/rust/src/protobuf/encode.rs
@@ -9,8 +9,8 @@ use crate::{
         list::List,
         obj::Obj,
         qstr::Qstr,
+        util,
     },
-    util,
 };
 
 use super::{
diff --git a/core/embed/rust/src/protobuf/obj.rs b/core/embed/rust/src/protobuf/obj.rs
index d3451011b..815c6be0e 100644
--- a/core/embed/rust/src/protobuf/obj.rs
+++ b/core/embed/rust/src/protobuf/obj.rs
@@ -10,8 +10,8 @@ use crate::{
         obj::{Obj, ObjBase},
         qstr::Qstr,
         typ::Type,
+        util,
     },
-    util,
 };
 
 use super::{
diff --git a/core/embed/rust/src/time.rs b/core/embed/rust/src/time.rs
index 25f5e880a..726d7a7e1 100644
--- a/core/embed/rust/src/time.rs
+++ b/core/embed/rust/src/time.rs
@@ -3,7 +3,7 @@ use core::{
     ops::{Div, Mul},
 };
 
-use crate::micropython::time;
+use crate::trezorhal::time;
 
 const MILLIS_PER_SEC: u32 = 1000;
 
@@ -83,7 +83,6 @@ pub struct Instant {
 
 impl Instant {
     pub fn now() -> Self {
-        // TODO: We should move this to `micropython::time`.
         Self {
             millis: time::ticks_ms(),
         }
diff --git a/core/embed/rust/src/trezorhal/mod.rs b/core/embed/rust/src/trezorhal/mod.rs
index 72c20fa29..b5571e8c4 100644
--- a/core/embed/rust/src/trezorhal/mod.rs
+++ b/core/embed/rust/src/trezorhal/mod.rs
@@ -5,3 +5,8 @@ pub mod display;
 mod ffi;
 pub mod random;
 pub mod slip39;
+
+#[cfg(not(feature = "micropython"))]
+pub mod time;
+#[cfg(feature = "micropython")]
+pub use crate::micropython::time;
diff --git a/core/embed/rust/src/trezorhal/time.rs b/core/embed/rust/src/trezorhal/time.rs
new file mode 100644
index 000000000..30c9454cb
--- /dev/null
+++ b/core/embed/rust/src/trezorhal/time.rs
@@ -0,0 +1,13 @@
+use crate::time::Duration;
+
+use super::ffi;
+
+pub fn ticks_ms() -> u32 {
+    unsafe { ffi::hal_ticks_ms() as _ }
+}
+
+pub fn sleep(delay: Duration) {
+    unsafe {
+        ffi::hal_delay(delay.to_millis() as _);
+    }
+}
diff --git a/core/embed/rust/src/ui/display.rs b/core/embed/rust/src/ui/display.rs
index 9a12c3999..966c58f87 100644
--- a/core/embed/rust/src/ui/display.rs
+++ b/core/embed/rust/src/ui/display.rs
@@ -1,5 +1,8 @@
 use super::constant;
-use crate::{micropython::time, time::Duration, trezorhal::display};
+use crate::{
+    time::Duration,
+    trezorhal::{display, time},
+};
 
 use super::geometry::{Offset, Point, Rect};
 
diff --git a/core/embed/rust/src/ui/layout/obj.rs b/core/embed/rust/src/ui/layout/obj.rs
index 63619cae1..8054c073a 100644
--- a/core/embed/rust/src/ui/layout/obj.rs
+++ b/core/embed/rust/src/ui/layout/obj.rs
@@ -11,6 +11,7 @@ use crate::{
         obj::{Obj, ObjBase},
         qstr::Qstr,
         typ::Type,
+        util,
     },
     time::Duration,
     ui::{
@@ -18,7 +19,6 @@ use crate::{
         constant,
         geometry::Rect,
     },
-    util,
 };
 
 #[cfg(feature = "buttons")]
diff --git a/core/embed/rust/src/ui/mod.rs b/core/embed/rust/src/ui/mod.rs
index 1ca837741..12489ee51 100644
--- a/core/embed/rust/src/ui/mod.rs
+++ b/core/embed/rust/src/ui/mod.rs
@@ -7,6 +7,9 @@ pub mod constant;
 pub mod display;
 pub mod event;
 pub mod geometry;
+mod util;
+
+#[cfg(feature = "micropython")]
 pub mod layout;
 
 #[cfg(feature = "model_t1")]
diff --git a/core/embed/rust/src/ui/model_t1/layout.rs b/core/embed/rust/src/ui/model_t1/layout.rs
index e4758bb08..8fc468343 100644
--- a/core/embed/rust/src/ui/model_t1/layout.rs
+++ b/core/embed/rust/src/ui/model_t1/layout.rs
@@ -2,7 +2,7 @@ use core::convert::TryInto;
 
 use crate::{
     error::Error,
-    micropython::{buffer::StrBuffer, map::Map, module::Module, obj::Obj, qstr::Qstr},
+    micropython::{buffer::StrBuffer, map::Map, module::Module, obj::Obj, qstr::Qstr, util},
     ui::{
         component::{
             base::Component,
@@ -15,7 +15,6 @@ use crate::{
             result::{CANCELLED, CONFIRMED},
         },
     },
-    util,
 };
 
 use super::{
diff --git a/core/embed/rust/src/ui/model_t1/mod.rs b/core/embed/rust/src/ui/model_t1/mod.rs
index c4e099002..c6eb39480 100644
--- a/core/embed/rust/src/ui/model_t1/mod.rs
+++ b/core/embed/rust/src/ui/model_t1/mod.rs
@@ -1,4 +1,6 @@
 pub mod component;
 pub mod constant;
-pub mod layout;
 pub mod theme;
+
+#[cfg(feature = "micropython")]
+pub mod layout;
diff --git a/core/embed/rust/src/ui/model_tr/layout.rs b/core/embed/rust/src/ui/model_tr/layout.rs
index 757d34d00..483046ded 100644
--- a/core/embed/rust/src/ui/model_tr/layout.rs
+++ b/core/embed/rust/src/ui/model_tr/layout.rs
@@ -2,7 +2,7 @@ use core::convert::TryInto;
 
 use crate::{
     error::Error,
-    micropython::{buffer::StrBuffer, map::Map, module::Module, obj::Obj, qstr::Qstr},
+    micropython::{buffer::StrBuffer, map::Map, module::Module, obj::Obj, qstr::Qstr, util},
     ui::{
         component::{
             base::Component,
@@ -15,7 +15,6 @@ use crate::{
             result::{CANCELLED, CONFIRMED},
         },
     },
-    util,
 };
 
 use super::{
diff --git a/core/embed/rust/src/ui/model_tr/mod.rs b/core/embed/rust/src/ui/model_tr/mod.rs
index c4e099002..c6eb39480 100644
--- a/core/embed/rust/src/ui/model_tr/mod.rs
+++ b/core/embed/rust/src/ui/model_tr/mod.rs
@@ -1,4 +1,6 @@
 pub mod component;
 pub mod constant;
-pub mod layout;
 pub mod theme;
+
+#[cfg(feature = "micropython")]
+pub mod layout;
diff --git a/core/embed/rust/src/ui/model_tt/component/keyboard/common.rs b/core/embed/rust/src/ui/model_tt/component/keyboard/common.rs
index f23eeb333..616b1c0d5 100644
--- a/core/embed/rust/src/ui/model_tt/component/keyboard/common.rs
+++ b/core/embed/rust/src/ui/model_tt/component/keyboard/common.rs
@@ -6,8 +6,8 @@ use crate::{
         component::{Event, EventCtx, TimerToken},
         display::{self, Color, Font},
         geometry::{Offset, Point, Rect},
+        util::ResultExt,
     },
-    util::ResultExt,
 };
 
 pub const HEADER_HEIGHT: i32 = 25;
diff --git a/core/embed/rust/src/ui/model_tt/component/keyboard/slip39.rs b/core/embed/rust/src/ui/model_tt/component/keyboard/slip39.rs
index 548d4d0a4..71531ee8e 100644
--- a/core/embed/rust/src/ui/model_tt/component/keyboard/slip39.rs
+++ b/core/embed/rust/src/ui/model_tt/component/keyboard/slip39.rs
@@ -18,8 +18,8 @@ use crate::{
             },
             theme,
         },
+        util::ResultExt,
     },
-    util::ResultExt,
 };
 
 const MAX_LENGTH: usize = 8;
diff --git a/core/embed/rust/src/ui/model_tt/layout.rs b/core/embed/rust/src/ui/model_tt/layout.rs
index d8759e739..3cbf99046 100644
--- a/core/embed/rust/src/ui/model_tt/layout.rs
+++ b/core/embed/rust/src/ui/model_tt/layout.rs
@@ -2,7 +2,7 @@ use core::{convert::TryInto, ops::Deref};
 
 use crate::{
     error::Error,
-    micropython::{buffer::StrBuffer, map::Map, module::Module, obj::Obj, qstr::Qstr},
+    micropython::{buffer::StrBuffer, map::Map, module::Module, obj::Obj, qstr::Qstr, util},
     ui::{
         component::{
             base::ComponentExt,
@@ -15,7 +15,6 @@ use crate::{
             result::{CANCELLED, CONFIRMED, INFO},
         },
     },
-    util,
 };
 
 use super::{
diff --git a/core/embed/rust/src/ui/model_tt/mod.rs b/core/embed/rust/src/ui/model_tt/mod.rs
index 43d96a0f7..8d508e39c 100644
--- a/core/embed/rust/src/ui/model_tt/mod.rs
+++ b/core/embed/rust/src/ui/model_tt/mod.rs
@@ -1,5 +1,7 @@
 pub mod component;
 pub mod constant;
 pub mod event;
-pub mod layout;
 pub mod theme;
+
+#[cfg(feature = "micropython")]
+pub mod layout;
diff --git a/core/embed/rust/src/ui/util.rs b/core/embed/rust/src/ui/util.rs
new file mode 100644
index 000000000..f07b22881
--- /dev/null
+++ b/core/embed/rust/src/ui/util.rs
@@ -0,0 +1,12 @@
+pub trait ResultExt {
+    fn assert_if_debugging_ui(self, message: &str);
+}
+
+impl<T, E> ResultExt for Result<T, E> {
+    fn assert_if_debugging_ui(self, #[allow(unused)] message: &str) {
+        #[cfg(feature = "ui_debug")]
+        if self.is_err() {
+            panic!("{}", message);
+        }
+    }
+}
diff --git a/core/embed/rust/trezorhal.h b/core/embed/rust/trezorhal.h
index 18cc77fba..a9983404f 100644
--- a/core/embed/rust/trezorhal.h
+++ b/core/embed/rust/trezorhal.h
@@ -1,3 +1,4 @@
+#include "common.h"
 #include "display.h"
 #include "secbool.h"
 #include "storage.h"
diff --git a/core/embed/trezorhal/common.c b/core/embed/trezorhal/common.c
index 9b4a797de..f0396a7be 100644
--- a/core/embed/trezorhal/common.c
+++ b/core/embed/trezorhal/common.c
@@ -134,6 +134,7 @@ void __assert_func(const char *file, int line, const char *func,
 #endif
 
 void hal_delay(uint32_t ms) { HAL_Delay(ms); }
+uint32_t hal_ticks_ms() { return HAL_GetTick(); }
 
 // reference RM0090 section 35.12.1 Figure 413
 #define USB_OTG_HS_DATA_FIFO_RAM (USB_OTG_HS_PERIPH_BASE + 0x20000U)
diff --git a/core/embed/trezorhal/common.h b/core/embed/trezorhal/common.h
index 57ab303c6..1bee151f9 100644
--- a/core/embed/trezorhal/common.h
+++ b/core/embed/trezorhal/common.h
@@ -66,6 +66,7 @@ error_shutdown(const char *line1, const char *line2, const char *line3,
        : __fatal_error(#expr, msg, __FILE__, __LINE__, __func__))
 
 void hal_delay(uint32_t ms);
+uint32_t hal_ticks_ms();
 
 void clear_otg_hs_memory(void);
 
diff --git a/core/embed/unix/common.c b/core/embed/unix/common.c
index 8549b4bab..57d9e4944 100644
--- a/core/embed/unix/common.c
+++ b/core/embed/unix/common.c
@@ -20,6 +20,7 @@
 #include <SDL.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <sys/time.h>
 #include <unistd.h>
 
 #include "common.h"
@@ -116,6 +117,12 @@ error_shutdown(const char *line1, const char *line2, const char *line3,
 
 void hal_delay(uint32_t ms) { usleep(1000 * ms); }
 
+uint32_t hal_ticks_ms() {
+  struct timeval tv;
+  gettimeofday(&tv, NULL);
+  return tv.tv_sec * 1000 + tv.tv_usec / 1000;
+}
+
 static int SDLCALL emulator_event_filter(void *userdata, SDL_Event *event) {
   switch (event->type) {
     case SDL_QUIT: