diff --git a/bootloader/Makefile.bootloader b/bootloader/Makefile.bootloader
index a47465e42b..8a961e5207 100644
--- a/bootloader/Makefile.bootloader
+++ b/bootloader/Makefile.bootloader
@@ -44,7 +44,6 @@ INC += -I$(CMSIS_DIR)/devinc
 INC += -I$(HAL_DIR)/inc
 INC += -I$(USBDEV_DIR)/core/inc -I$(USBDEV_DIR)/class/inc
 #INC += -I$(USBHOST_DIR)
-INC += -I../extmod/modtrezorui
 
 CFLAGS_CORTEX_M = -mthumb -mabi=aapcs-linux -mfpu=fpv4-sp-d16 -mfloat-abi=hard -fsingle-precision-constant -Wdouble-promotion
 CFLAGS_MCU_f4 = $(CFLAGS_CORTEX_M) -mtune=cortex-m4 -mcpu=cortex-m4 -DMCU_SERIES_F4
@@ -76,6 +75,10 @@ endif
 # uncomment this if you want libgcc
 LIBS += $(shell $(CC) -print-libgcc-file-name)
 
+SRC_LIB = $(addprefix lib/,\
+	libc/string0.c \
+	)
+
 SRC_C = \
 	bootloader.c \
 	bootloader_ui.c \
@@ -128,18 +131,22 @@ SRC_USBDEV = $(addprefix $(USBDEV_DIR)/,\
 	class/src/usbd_msc_data.c \
 	)
 
-SRC_MODUI = $(addprefix extmod/modtrezorui/,\
+ifeq ($(MICROPY_PY_TREZORUI),1)
+INC += -I../extmod/modtrezorui
+SRC_MOD += $(addprefix extmod/modtrezorui/,\
 	display.c \
 	inflate.c \
 	font_robotomono_regular.c \
 	)
+endif
 
 OBJ =
+OBJ += $(addprefix $(BUILD)/, $(SRC_LIB:.c=.o))
 OBJ += $(addprefix $(BUILD)/, $(SRC_C:.c=.o))
 OBJ += $(addprefix $(BUILD)/, $(SRC_O))
 OBJ += $(addprefix $(BUILD)/, $(SRC_HAL:.c=.o))
 OBJ += $(addprefix $(BUILD)/, $(SRC_USBDEV:.c=.o))
-OBJ += $(addprefix $(BUILD)/, $(SRC_MODUI:.c=.o))
+OBJ += $(addprefix $(BUILD)/, $(SRC_MOD:.c=.o))
 OBJ += $(BUILD)/pins_$(BOARD).o
 
 # We put ff.o and stm32f4xx_hal_sd.o into the first 16K section with the ISRs.
@@ -203,6 +210,8 @@ CDCINF_TEMPLATE = pybcdc.inf_template
 GEN_CDCINF_FILE = $(HEADER_BUILD)/pybcdc.inf
 GEN_CDCINF_HEADER = $(HEADER_BUILD)/pybcdc_inf.h
 
+# List of sources for qstr extraction
+SRC_QSTR += $(SRC_C) $(SRC_MOD) $(SRC_LIB)
 # Append any auto-generated sources that are needed by sources listed in
 # SRC_QSTR
 SRC_QSTR_AUTO_DEPS += $(GEN_CDCINF_HEADER)
diff --git a/bootloader/bootloader_ui.c b/bootloader/bootloader_ui.c
index 33b8f55a49..e113139fac 100644
--- a/bootloader/bootloader_ui.c
+++ b/bootloader/bootloader_ui.c
@@ -1,10 +1,14 @@
 #include "display.h"
 #include "bootloader_trezor.h"
 
+#define ui_WHITE 0xFFFF
+#define ui_BLACK 0x0000
+#define ui_BLUE  0x24BE
+
 void screen_welcome(void)
 {
     display_image(0, 0, 240, 240, toi_trezor, sizeof(toi_trezor));
-    display_text(0, 240, "bootloader", 10, FONT_MONO, 0xFFFF, 0x0000);
+    display_text(0, 240, "bootloader", 10, FONT_MONO, ui_WHITE, ui_BLACK);
 }
 
 void screen_info(void)
@@ -15,8 +19,16 @@ void screen_upload_request(void)
 {
 }
 
+
 void screen_upload_progress(int permil)
 {
+    char label[5] = "100%";
+    char *plabel = label;
+    // TODO: convert permil -> plabel
+    display_text_center(120, 192 + 32, "Uploading firmware", -1, FONT_NORMAL, ui_WHITE, ui_BLACK);
+    display_loader(permil, ui_BLUE, ui_BLACK, 0, 0, 0);
+    display_text_center(120, 192 / 2 + 14 / 2, plabel, -1, FONT_BOLD, ui_WHITE, ui_BLACK);
+    display_refresh();
 }
 
 void screen_upload_success(void)
diff --git a/extmod/modtrezorui/display.c b/extmod/modtrezorui/display.c
index ce88803eb5..1dbe412cee 100644
--- a/extmod/modtrezorui/display.c
+++ b/extmod/modtrezorui/display.c
@@ -195,6 +195,10 @@ void display_text(uint8_t x, uint8_t y, const char *text, int textlen, uint8_t f
     uint16_t colortable[16];
     set_color_table(colortable, fgcolor, bgcolor);
 
+    // determine text length if not provided
+    if (textlen < 0) {
+        textlen = strlen(text);
+    }
     // render glyphs
     for (int i = 0; i < textlen; i++) {
         const uint8_t *g = get_glyph(font, (uint8_t)text[i]);
@@ -219,12 +223,28 @@ void display_text(uint8_t x, uint8_t y, const char *text, int textlen, uint8_t f
     }
 }
 
+void display_text_center(uint8_t x, uint8_t y, const char *text, int textlen, uint8_t font, uint16_t fgcolor, uint16_t bgcolor)
+{
+    uint32_t w = display_text_width(text, textlen, font);
+    display_text(x - w / 2, y, text, textlen, font, fgcolor, bgcolor);
+}
+
+void display_text_right(uint8_t x, uint8_t y, const char *text, int textlen, uint8_t font, uint16_t fgcolor, uint16_t bgcolor)
+{
+    uint32_t w = display_text_width(text, textlen, font);
+    display_text(x - w, y, text, textlen, font, fgcolor, bgcolor);
+}
+
 // compute the width of the text (in pixels)
-uint32_t display_text_width(const uint8_t *text, int textlen, uint8_t font)
+uint32_t display_text_width(const char *text, int textlen, uint8_t font)
 {
     uint32_t w = 0;
+    // determine text length if not provided
+    if (textlen < 0) {
+        textlen = strlen(text);
+    }
     for (int i = 0; i < textlen; i++) {
-        const uint8_t *g = get_glyph(font, text[i]);
+        const uint8_t *g = get_glyph(font, (uint8_t)text[i]);
         if (!g) continue;
         w += g[2];
     }
diff --git a/extmod/modtrezorui/display.h b/extmod/modtrezorui/display.h
index 613313f0ef..8ee957d848 100644
--- a/extmod/modtrezorui/display.h
+++ b/extmod/modtrezorui/display.h
@@ -31,7 +31,9 @@ void display_blit(uint8_t x, uint8_t y, uint8_t w, uint8_t h, const void *data,
 void display_image(uint8_t x, uint8_t y, uint8_t w, uint8_t h, const void *data, int datalen);
 void display_icon(uint8_t x, uint8_t y, uint8_t w, uint8_t h, const void *data, int datalen, uint16_t fgcolor, uint16_t bgcolor);
 void display_text(uint8_t x, uint8_t y, const char *text, int textlen, uint8_t font, uint16_t fgcolor, uint16_t bgcolor);
-uint32_t display_text_width(const uint8_t *text, int textlen, uint8_t font);
+void display_text_center(uint8_t x, uint8_t y, const char *text, int textlen, uint8_t font, uint16_t fgcolor, uint16_t bgcolor);
+void display_text_right(uint8_t x, uint8_t y, const char *text, int textlen, uint8_t font, uint16_t fgcolor, uint16_t bgcolor);
+uint32_t display_text_width(const char *text, int textlen, uint8_t font);
 void display_qrcode(uint8_t x, uint8_t y, const char *data, int datalen, int scale);
 void display_loader(uint16_t progress, uint16_t fgcolor, uint16_t bgcolor, const uint8_t *icon, uint32_t iconlen, uint16_t iconfgcolor);
 void display_raw(uint8_t reg, const uint8_t *data, int datalen);
diff --git a/extmod/modtrezorui/modtrezorui-display.h b/extmod/modtrezorui/modtrezorui-display.h
index 2555e4a72e..a9b99c708a 100644
--- a/extmod/modtrezorui/modtrezorui-display.h
+++ b/extmod/modtrezorui/modtrezorui-display.h
@@ -175,8 +175,7 @@ STATIC mp_obj_t mod_TrezorUi_Display_text_center(size_t n_args, const mp_obj_t *
     mp_int_t font = mp_obj_get_int(args[4]);
     mp_int_t fgcolor = mp_obj_get_int(args[5]);
     mp_int_t bgcolor = mp_obj_get_int(args[6]);
-    uint32_t w = display_text_width(text.buf, text.len, font);
-    display_text(x - w / 2, y, text.buf, text.len, font, fgcolor, bgcolor);
+    display_text_center(x, y, text.buf, text.len, font, fgcolor, bgcolor);
     return mp_const_none;
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_TrezorUi_Display_text_center_obj, 7, 7, mod_TrezorUi_Display_text_center);
@@ -194,8 +193,7 @@ STATIC mp_obj_t mod_TrezorUi_Display_text_right(size_t n_args, const mp_obj_t *a
     mp_int_t font = mp_obj_get_int(args[4]);
     mp_int_t fgcolor = mp_obj_get_int(args[5]);
     mp_int_t bgcolor = mp_obj_get_int(args[6]);
-    uint32_t w = display_text_width(text.buf, text.len, font);
-    display_text(x - w, y, text.buf, text.len, font, fgcolor, bgcolor);
+    display_text_right(x, y, text.buf, text.len, font, fgcolor, bgcolor);
     return mp_const_none;
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_TrezorUi_Display_text_right_obj, 7, 7, mod_TrezorUi_Display_text_right);