Merge pull request #4446 from tannewt/rp2040_flash

Switch RP2040 flash settings to nvm.toml
adafruit · Mar 23, 2021 · c81007a · c81007a
2 parents f8cea3b + 36edc4b
commit c81007a
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Showing 40 changed files with 474 additions and 95 deletions.
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
@@ -38,7 +38,7 @@ jobs:
         sudo apt-get update
         sudo apt-get install -y eatmydata
         sudo eatmydata apt-get install -y gettext librsvg2-bin mingw-w64 latexmk texlive-fonts-recommended texlive-latex-recommended texlive-latex-extra
-        pip install requests sh click setuptools cpp-coveralls "Sphinx<4" sphinx-rtd-theme recommonmark sphinx-autoapi sphinxcontrib-svg2pdfconverter polib pyyaml astroid isort black awscli mypy
+        pip install -r requirements-dev.txt
     - name: Versions
       run: |
         gcc --version
@@ -132,15 +132,6 @@ jobs:
       env:
         GITHUB_CONTEXT: ${{ toJson(github) }}
       run: echo "$GITHUB_CONTEXT"
-    - name: Install dependencies
-      run: |
-        brew install gettext
-        echo >>$GITHUB_PATH /usr/local/opt/gettext/bin
-    - name: Versions
-      run: |
-        gcc --version
-        python3 --version
-        msgfmt --version
     - uses: actions/checkout@v2.2.0
       with:
         submodules: true
@@ -150,6 +141,15 @@ jobs:
       run: |
         git describe --dirty --tags
         echo >>$GITHUB_ENV CP_VERSION=$(git describe --dirty --tags)
+    - name: Install dependencies
+      run: |
+        brew install gettext
+        echo >>$GITHUB_PATH /usr/local/opt/gettext/bin
+    - name: Versions
+      run: |
+        gcc --version
+        python3 --version
+        msgfmt --version
     - name: Build mpy-cross
       run: make -C mpy-cross -j2
     - uses: actions/upload-artifact@v2
@@ -178,6 +178,7 @@ jobs:
         - "TG-Watch"
         - "adafruit_feather_rp2040"
         - "adafruit_itsybitsy_rp2040"
+        - "adafruit_qtpy_rp2040"
         - "aloriumtech_evo_m51"
         - "aramcon_badge_2019"
         - "arduino_mkr1300"
@@ -299,7 +300,6 @@ jobs:
         - "pyruler"
         - "qtpy_m0"
         - "qtpy_m0_haxpress"
-        - "qtpy_rp2040"
         - "raspberry_pi_pico"
         - "raytac_mdbt50q-db-40"
         - "robohatmm1_m4"
@@ -355,22 +355,22 @@ jobs:
       uses: actions/setup-python@v1
       with:
         python-version: 3.8
+    - uses: actions/checkout@v2.2.0
+      with:
+        submodules: true
+        fetch-depth: 0
+    - run: git fetch --recurse-submodules=no https://github.com/adafruit/circuitpython refs/tags/*:refs/tags/*
     - name: Install deps
       run: |
         sudo apt-get install -y gettext
-        pip install requests sh click setuptools awscli
+        pip install -r requirements-dev.txt
         wget --no-verbose https://adafruit-circuit-python.s3.amazonaws.com/gcc-arm-none-eabi-10-2020-q4-major-x86_64-linux.tar.bz2
         sudo tar -C /usr --strip-components=1 -xaf gcc-arm-none-eabi-10-2020-q4-major-x86_64-linux.tar.bz2
     - name: Versions
       run: |
         gcc --version
         arm-none-eabi-gcc --version
         python3 --version
-    - uses: actions/checkout@v2.2.0
-      with:
-        submodules: true
-        fetch-depth: 0
-    - run: git fetch --recurse-submodules=no https://github.com/adafruit/circuitpython refs/tags/*:refs/tags/*
     - name: mpy-cross
       run: make -C mpy-cross -j2
     - name: build
@@ -404,6 +404,11 @@ jobs:
       uses: actions/setup-python@v1
       with:
         python-version: 3.8
+    - uses: actions/checkout@v2.2.0
+      with:
+        submodules: true
+        fetch-depth: 0
+    - run: git fetch --recurse-submodules=no https://github.com/adafruit/circuitpython refs/tags/*:refs/tags/*
     - name: Install deps
       run: |
         sudo apt-get install -y gettext
@@ -415,11 +420,6 @@ jobs:
         gcc --version
         riscv64-unknown-elf-gcc --version
         python3 --version
-    - uses: actions/checkout@v2.2.0
-      with:
-        submodules: true
-        fetch-depth: 0
-    - run: git fetch --recurse-submodules=no https://github.com/adafruit/circuitpython refs/tags/*:refs/tags/*
     - name: mpy-cross
       run: make -C mpy-cross -j2
     - name: build
@@ -500,7 +500,7 @@ jobs:
     - name: Install CircuitPython deps
       run: |
         source $IDF_PATH/export.sh
-        pip install requests sh click setuptools awscli
+        pip install -r requirements-dev.txt
         sudo apt-get install -y gettext ninja-build
       env:
         IDF_PATH: ${{ github.workspace }}/ports/esp32s2/esp-idf

diff --git a/.github/workflows/create_website_pr.yml b/.github/workflows/create_website_pr.yml
@@ -22,7 +22,7 @@ jobs:
         python-version: 3.8
     - name: Install deps
       run: |
-        pip install requests sh click
+        pip install -r requirements-dev.txt
     - name: Versions
       run: |
         gcc --version

diff --git a/.github/workflows/pre-commit.yml b/.github/workflows/pre-commit.yml
@@ -18,7 +18,7 @@ jobs:
       run: |
         sudo apt-add-repository -y -u ppa:pybricks/ppa
         sudo apt-get install -y black gettext uncrustify
-        pip3 install polib
+        pip3 install -r requirements-dev.txt
     - name: Populate selected submodules
       run: git submodule update --init extmod/ulab
     - name: Set PY

diff --git a/.gitmodules b/.gitmodules
@@ -173,4 +173,8 @@
 	url = https://github.com/adafruit/Adafruit_CircuitPython_LC709203F
 [submodule "ports/raspberrypi/sdk"]
 	path = ports/raspberrypi/sdk
-	url = https://github.com/raspberrypi/pico-sdk.git
+	url = https://github.com/adafruit/pico-sdk.git
+[submodule "data/nvm.toml"]
+	path = data/nvm.toml
+	url = https://github.com/adafruit/nvm.toml.git
+	branch = main
diff --git a/conf.py b/conf.py
@@ -154,6 +154,7 @@
                     ".env",
                     ".venv",
                     ".direnv",
+                    "data",
                     "docs/autoapi",
                     "docs/README.md",
                     "drivers",

diff --git a/data/nvm.toml b/data/nvm.toml
diff --git a/ports/raspberrypi/Makefile b/ports/raspberrypi/Makefile
@@ -106,7 +106,7 @@ INC += -I. \
        -I$(BUILD)
 
 # Pico specific configuration
-CFLAGS += -DPICO_ON_DEVICE=1 -DPICO_NO_BINARY_INFO=0 -DPICO_TIME_DEFAULT_ALARM_POOL_DISABLED=1 -DPICO_DIVIDER_CALL_IDIV0=0 -DPICO_DIVIDER_CALL_LDIV0=0 -DPICO_DIVIDER_HARDWARE=1 -DPICO_DOUBLE_ROM=1 -DPICO_FLOAT_ROM=1 -DPICO_MULTICORE=1 -DPICO_BITS_IN_RAM=0 -DPICO_DIVIDER_IN_RAM=0 -DPICO_DOUBLE_PROPAGATE_NANS=0 -DPICO_DOUBLE_IN_RAM=0 -DPICO_MEM_IN_RAM=0 -DPICO_FLOAT_IN_RAM=0 -DPICO_FLOAT_PROPAGATE_NANS=1 -DPICO_NO_FLASH=0 -DPICO_COPY_TO_RAM=0 -DPICO_DISABLE_SHARED_IRQ_HANDLERS=0 -DPICO_NO_BI_BOOTSEL_VIA_DOUBLE_RESET=0
+CFLAGS += -DRASPBERRYPI -DPICO_ON_DEVICE=1 -DPICO_NO_BINARY_INFO=0 -DPICO_TIME_DEFAULT_ALARM_POOL_DISABLED=1 -DPICO_DIVIDER_CALL_IDIV0=0 -DPICO_DIVIDER_CALL_LDIV0=0 -DPICO_DIVIDER_HARDWARE=1 -DPICO_DOUBLE_ROM=1 -DPICO_FLOAT_ROM=1 -DPICO_MULTICORE=1 -DPICO_BITS_IN_RAM=0 -DPICO_DIVIDER_IN_RAM=0 -DPICO_DOUBLE_PROPAGATE_NANS=0 -DPICO_DOUBLE_IN_RAM=0 -DPICO_MEM_IN_RAM=0 -DPICO_FLOAT_IN_RAM=0 -DPICO_FLOAT_PROPAGATE_NANS=1 -DPICO_NO_FLASH=0 -DPICO_COPY_TO_RAM=0 -DPICO_DISABLE_SHARED_IRQ_HANDLERS=0 -DPICO_NO_BI_BOOTSEL_VIA_DOUBLE_RESET=0
 OPTIMIZATION_FLAGS ?= -O3
 # TinyUSB defines
 CFLAGS += -DTUD_OPT_RP2040_USB_DEVICE_ENUMERATION_FIX=1 -DCFG_TUSB_MCU=OPT_MCU_RP2040 -DCFG_TUD_MIDI_RX_BUFSIZE=128 -DCFG_TUD_CDC_RX_BUFSIZE=256 -DCFG_TUD_MIDI_TX_BUFSIZE=128 -DCFG_TUD_CDC_TX_BUFSIZE=256 -DCFG_TUD_MSC_BUFSIZE=1024
@@ -169,7 +169,7 @@ SRC_SDK := \
 	src/rp2_common/hardware_irq/irq.c \
 	src/rp2_common/hardware_pio/pio.c \
 	src/rp2_common/hardware_pll/pll.c \
-  src/rp2_common/hardware_rtc/rtc.c \
+	src/rp2_common/hardware_rtc/rtc.c \
 	src/rp2_common/hardware_spi/spi.c \
 	src/rp2_common/hardware_sync/sync.c \
 	src/rp2_common/hardware_timer/timer.c \
@@ -233,7 +233,6 @@ SRC_SHARED_MODULE_EXPANDED = $(addprefix shared-bindings/, $(SRC_SHARED_MODULE))
 SRC_COMMON_HAL_SHARED_MODULE_EXPANDED = $(sort $(SRC_COMMON_HAL_EXPANDED) $(SRC_SHARED_MODULE_EXPANDED))
 
 SRC_S = supervisor/$(CHIP_FAMILY)_cpu.s
-BOOT2_S_UPPER ?= sdk/src/rp2_common/boot_stage2/boot2_generic_03h.S
 BOOT2_S_CFLAGS ?= -DPICO_FLASH_SPI_CLKDIV=4
 SRC_S_UPPER = sdk/src/rp2_common/hardware_divider/divider.S \
               sdk/src/rp2_common/hardware_irq/irq_handler_chain.S \
@@ -270,9 +269,15 @@ $(BUILD)/boot2.bin: $(BUILD)/boot2.elf
 	$(STEPECHO) "OBJCOPY $<"
 	$(Q)$(OBJCOPY) -O binary $< $@
 
-$(BUILD)/boot2.elf: $(BOOT2_S_UPPER) | $(BUILD)/
+
+$(BUILD)/stage2.c: stage2.c.jinja gen_stage2.py | $(BUILD)/
+	$(STEPECHO) "GEN $<"
+	$(Q)$(PYTHON3) gen_stage2.py $< $@ $(EXTERNAL_FLASH_DEVICES)
+
+$(BUILD)/boot2.elf: $(BUILD)/stage2.c
 	$(STEPECHO) "BOOT $<"
-	$(Q)$(CC) $(CFLAGS) $(BOOT2_S_CFLAGS) -Isdk/src/rp2_common/boot_stage2/asminclude --specs=nosys.specs -nostartfiles -Wl,-T,sdk/src/rp2_common/boot_stage2/boot_stage2.ld -o $@ $<
+	$(Q)$(CC) $(CFLAGS) $(BOOT2_S_CFLAGS) -Os -ggdb3 -I. -fPIC --specs=nosys.specs -nostartfiles -Wl,-T,boot_stage2.ld  -Wl,-Map=$@.map -o $@ $<
+	$(Q)$(SIZE) $@
 
 SRC_QSTR += $(SRC_C) $(SRC_SUPERVISOR) $(SRC_COMMON_HAL_EXPANDED) $(SRC_SHARED_MODULE_EXPANDED)
 
@@ -285,7 +290,7 @@ $(BUILD)/firmware.elf: $(OBJ) link.ld
 
 $(BUILD)/firmware.bin: $(BUILD)/firmware.elf
 	$(STEPECHO) "Create $@"
-	$(Q)$(OBJCOPY) -O binary $^ $@
+	$(Q)$(OBJCOPY) -O binary -R .dtcm_bss $^ $@
 
 $(BUILD)/firmware.uf2: $(BUILD)/firmware.bin
 	$(STEPECHO) "Create $@"

diff --git a/ports/raspberrypi/boards/adafruit_feather_rp2040/mpconfigboard.h b/ports/raspberrypi/boards/adafruit_feather_rp2040/mpconfigboard.h
@@ -12,6 +12,3 @@
 
 #define DEFAULT_UART_BUS_RX (&pin_GPIO1)
 #define DEFAULT_UART_BUS_TX (&pin_GPIO0)
-
-// Flash chip is GD25Q64 connected over QSPI
-#define TOTAL_FLASH_SIZE (8 * 1024 * 1024)
diff --git a/ports/raspberrypi/boards/adafruit_feather_rp2040/mpconfigboard.mk b/ports/raspberrypi/boards/adafruit_feather_rp2040/mpconfigboard.mk
@@ -6,4 +6,4 @@ USB_MANUFACTURER = "Adafruit"
 CHIP_VARIANT = RP2040
 CHIP_FAMILY = rp2
 
-INTERNAL_FLASH_FILESYSTEM = 1
+EXTERNAL_FLASH_DEVICES = "GD25Q64C"
diff --git a/ports/raspberrypi/boards/adafruit_itsybitsy_rp2040/mpconfigboard.h b/ports/raspberrypi/boards/adafruit_itsybitsy_rp2040/mpconfigboard.h
@@ -12,6 +12,3 @@
 
 #define DEFAULT_UART_BUS_RX (&pin_GPIO1)
 #define DEFAULT_UART_BUS_TX (&pin_GPIO0)
-
-// Flash chip is W25Q64 connected over QSPI
-#define TOTAL_FLASH_SIZE (8 * 1024 * 1024)
diff --git a/ports/raspberrypi/boards/adafruit_itsybitsy_rp2040/mpconfigboard.mk b/ports/raspberrypi/boards/adafruit_itsybitsy_rp2040/mpconfigboard.mk
@@ -6,4 +6,4 @@ USB_MANUFACTURER = "Adafruit"
 CHIP_VARIANT = RP2040
 CHIP_FAMILY = rp2
 
-INTERNAL_FLASH_FILESYSTEM = 1
+EXTERNAL_FLASH_DEVICES = "W25Q64JVxQ"
diff --git a/ports/raspberrypi/boards/qtpy_rp2040/board.c → ...rrypi/boards/adafruit_qtpy_rp2040/board.c b/ports/raspberrypi/boards/qtpy_rp2040/board.c → ...rrypi/boards/adafruit_qtpy_rp2040/board.c
diff --git a/...errypi/boards/qtpy_rp2040/mpconfigboard.h → ...ards/adafruit_qtpy_rp2040/mpconfigboard.h b/...errypi/boards/qtpy_rp2040/mpconfigboard.h → ...ards/adafruit_qtpy_rp2040/mpconfigboard.h
@@ -12,6 +12,3 @@
 
 #define DEFAULT_UART_BUS_RX (&pin_GPIO5)
 #define DEFAULT_UART_BUS_TX (&pin_GPIO20)
-
-// Flash chip is GD25Q64 connected over QSPI
-#define TOTAL_FLASH_SIZE (8 * 1024 * 1024)
diff --git a/...rrypi/boards/qtpy_rp2040/mpconfigboard.mk → ...rds/adafruit_qtpy_rp2040/mpconfigboard.mk b/...rrypi/boards/qtpy_rp2040/mpconfigboard.mk → ...rds/adafruit_qtpy_rp2040/mpconfigboard.mk
@@ -6,4 +6,4 @@ USB_MANUFACTURER = "Adafruit"
 CHIP_VARIANT = RP2040
 CHIP_FAMILY = rp2
 
-INTERNAL_FLASH_FILESYSTEM = 1
+EXTERNAL_FLASH_DEVICES = "W25Q64JVxQ"
diff --git a/ports/raspberrypi/boards/qtpy_rp2040/pins.c → ...errypi/boards/adafruit_qtpy_rp2040/pins.c b/ports/raspberrypi/boards/qtpy_rp2040/pins.c → ...errypi/boards/adafruit_qtpy_rp2040/pins.c
diff --git a/ports/raspberrypi/boards/pimoroni_keybow2040/mpconfigboard.h b/ports/raspberrypi/boards/pimoroni_keybow2040/mpconfigboard.h
@@ -28,8 +28,6 @@
 #define DEFAULT_UART_BUS_RX (&pin_GPIO1)
 #define DEFAULT_UART_BUS_TX (&pin_GPIO0)
 
-#define TOTAL_FLASH_SIZE (2 * 1024 * 1024)
-
 // These pins are unconnected
 #define IGNORE_PIN_GPIO2    1
 #define IGNORE_PIN_GPIO22   1

diff --git a/ports/raspberrypi/boards/pimoroni_keybow2040/mpconfigboard.mk b/ports/raspberrypi/boards/pimoroni_keybow2040/mpconfigboard.mk
@@ -6,6 +6,6 @@ USB_MANUFACTURER = "Pimoroni"
 CHIP_VARIANT = RP2040
 CHIP_FAMILY = rp2
 
-INTERNAL_FLASH_FILESYSTEM = 1
+EXTERNAL_FLASH_DEVICES = "W25Q16JVxQ"
 
 CIRCUITPY__EVE = 1
diff --git a/ports/raspberrypi/boards/pimoroni_picosystem/mpconfigboard.h b/ports/raspberrypi/boards/pimoroni_picosystem/mpconfigboard.h
@@ -38,8 +38,6 @@
 #define DEFAULT_UART_BUS_RX (&pin_GPIO1)
 #define DEFAULT_UART_BUS_TX (&pin_GPIO0)
 
-#define TOTAL_FLASH_SIZE (16 * 1024 * 1024)
-
 // These pins are unconnected
 #define IGNORE_PIN_GPIO3    1
 #define IGNORE_PIN_GPIO10   1

diff --git a/ports/raspberrypi/boards/pimoroni_picosystem/mpconfigboard.mk b/ports/raspberrypi/boards/pimoroni_picosystem/mpconfigboard.mk
@@ -6,6 +6,6 @@ USB_MANUFACTURER = "Pimoroni"
 CHIP_VARIANT = RP2040
 CHIP_FAMILY = rp2
 
-INTERNAL_FLASH_FILESYSTEM = 1
+EXTERNAL_FLASH_DEVICES = "W25Q128JVxQ"
 
 CIRCUITPY__EVE = 1
diff --git a/ports/raspberrypi/boards/pimoroni_tiny2040/mpconfigboard.h b/ports/raspberrypi/boards/pimoroni_tiny2040/mpconfigboard.h
@@ -7,8 +7,6 @@
 
 #define MICROPY_HW_USER_SW (&pin_GPIO23)
 
-#define TOTAL_FLASH_SIZE (8 * 1024 * 1024)
-
 // These pins are unconnected
 #define IGNORE_PIN_GPIO8    1
 #define IGNORE_PIN_GPIO9    1

diff --git a/ports/raspberrypi/boards/pimoroni_tiny2040/mpconfigboard.mk b/ports/raspberrypi/boards/pimoroni_tiny2040/mpconfigboard.mk
@@ -6,6 +6,6 @@ USB_MANUFACTURER = "Pimoroni"
 CHIP_VARIANT = RP2040
 CHIP_FAMILY = rp2
 
-INTERNAL_FLASH_FILESYSTEM = 1
+EXTERNAL_FLASH_DEVICES = "W25Q64JVxQ"
 
 CIRCUITPY__EVE = 1
diff --git a/ports/raspberrypi/boards/raspberry_pi_pico/mpconfigboard.h b/ports/raspberrypi/boards/raspberry_pi_pico/mpconfigboard.h
@@ -1,18 +1,2 @@
-// LEDs
-// #define MICROPY_HW_LED_STATUS   (&pin_PA17)
-
 #define MICROPY_HW_BOARD_NAME "Raspberry Pi Pico"
 #define MICROPY_HW_MCU_NAME "rp2040"
-
-// #define DEFAULT_I2C_BUS_SCL (&pin_PA23)
-// #define DEFAULT_I2C_BUS_SDA (&pin_PA22)
-
-// #define DEFAULT_SPI_BUS_SCK (&pin_PB11)
-// #define DEFAULT_SPI_BUS_MOSI (&pin_PB10)
-// #define DEFAULT_SPI_BUS_MISO (&pin_PA12)
-
-// #define DEFAULT_UART_BUS_RX (&pin_PA11)
-// #define DEFAULT_UART_BUS_TX (&pin_PA10)
-
-// Flash chip is W25Q16JVUXIQ connected over QSPI
-#define TOTAL_FLASH_SIZE (2 * 1024 * 1024)
diff --git a/ports/raspberrypi/boards/raspberry_pi_pico/mpconfigboard.mk b/ports/raspberrypi/boards/raspberry_pi_pico/mpconfigboard.mk
@@ -6,8 +6,6 @@ USB_MANUFACTURER = "Raspberry Pi"
 CHIP_VARIANT = RP2040
 CHIP_FAMILY = rp2
 
-INTERNAL_FLASH_FILESYSTEM = 1
+EXTERNAL_FLASH_DEVICES = "W25Q16JVxQ"
 
 CIRCUITPY__EVE = 1
-
-BOOT2_S_UPPER = sdk/src/rp2_common/boot_stage2/boot2_w25q080.S
diff --git a/ports/raspberrypi/boards/sparkfun_pro_micro_rp2040/mpconfigboard.h b/ports/raspberrypi/boards/sparkfun_pro_micro_rp2040/mpconfigboard.h
@@ -12,6 +12,3 @@
 
 #define DEFAULT_UART_BUS_RX (&pin_GPIO1)
 #define DEFAULT_UART_BUS_TX (&pin_GPIO0)
-
-// Flash chip is GD25Q128 connected over QSPI
-#define TOTAL_FLASH_SIZE (16 * 1024 * 1024)
diff --git a/ports/raspberrypi/boards/sparkfun_pro_micro_rp2040/mpconfigboard.mk b/ports/raspberrypi/boards/sparkfun_pro_micro_rp2040/mpconfigboard.mk
@@ -6,4 +6,4 @@ USB_MANUFACTURER = "SparkFun"
 CHIP_VARIANT = RP2040
 CHIP_FAMILY = rp2
 
-INTERNAL_FLASH_FILESYSTEM = 1
+EXTERNAL_FLASH_DEVICES = "W25Q128JVxM"
diff --git a/ports/raspberrypi/boards/sparkfun_thing_plus_rp2040/mpconfigboard.h b/ports/raspberrypi/boards/sparkfun_thing_plus_rp2040/mpconfigboard.h
@@ -12,6 +12,3 @@
 
 #define DEFAULT_UART_BUS_RX (&pin_GPIO1)
 #define DEFAULT_UART_BUS_TX (&pin_GPIO0)
-
-// Flash chip is GD25Q128 connected over QSPI
-#define TOTAL_FLASH_SIZE (16 * 1024 * 1024)
diff --git a/ports/raspberrypi/boards/sparkfun_thing_plus_rp2040/mpconfigboard.mk b/ports/raspberrypi/boards/sparkfun_thing_plus_rp2040/mpconfigboard.mk
@@ -6,4 +6,4 @@ USB_MANUFACTURER = "SparkFun"
 CHIP_VARIANT = RP2040
 CHIP_FAMILY = rp2
 
-INTERNAL_FLASH_FILESYSTEM = 1
+EXTERNAL_FLASH_DEVICES = "W25Q128JVxM"
diff --git a/ports/raspberrypi/boot_stage2.ld b/ports/raspberrypi/boot_stage2.ld
@@ -0,0 +1,13 @@
+MEMORY {
+    /* We are loaded to the top 256 bytes of SRAM, which is above the bootrom
+       stack. Note 4 bytes occupied by checksum. */
+    SRAM(rx) : ORIGIN = 0x20041f00, LENGTH = 252
+}
+
+SECTIONS {
+    . = ORIGIN(SRAM);
+    .text : {
+        *(.entry.*)
+        *(.text.*)
+    } >SRAM
+}