arch/risc-v: Add support for StarFive JH7110 SoC

.gitignore

@@ -61,3 +61,6 @@ uImage
 .DS_Store
 tools/gdb/__pycache__
 /build
+init.S
+initrd
+starfiveu.fit

Documentation/introduction/detailed_support.rst

@@ -3051,6 +3051,13 @@ Espressif ESP32-C6 Devkit board.
 Please, refer to the :doc:`ESP32-C6 </platforms/risc-v/esp32c6/index>` on NuttX for
 further information.
 
+StarFive JH7110
+---------------
+
+The basic port has been completed for the following StarFive JH7110 board:
+
+-  **PINE64 Star64**: Refer to :doc:`PINE64 Star64 </platforms/risc-v/jh7110/boards/star64/index>` for further information.
+
 ESP32 (Dual Xtensa LX6)
 =======================
 

Documentation/platforms/risc-v/jh7110/boards/star64/index.rst

@@ -0,0 +1,220 @@
+=============
+PINE64 Star64
+=============
+
+`Star64 <https://wiki.pine64.org/wiki/STAR64>`_ is a 64-bit RISC-V based
+Single Board Computer powered by StarFive JH7110 Quad-Core SiFive U74 64-Bit CPU,
+Imagination Technology BX-4-32 GPU and supports up to 8GB 1866MHz LPDDR4 memory.
+
+It provides an eMMC module socket, MicroSD Card slot, PCI-e, Pi-2 Bus, USB 3.0
+and many other peripheral interfaces for makers to integrate with sensors
+and other devices.
+
+Features
+========
+
+- **System on Chip:** StarFive JH7110
+    - **CPU:** SiFive RISC-V U74 Application Cores (4 cores, RV64GCB) and SiFive RISC-V S7 Monitor Core (single core, RV64IMACB)
+    - **GPU:** Imagination Technology BXE-4-32
+    - **RAM:** LPDDR4 2GB / 4GB / 8GB
+- **Video:** Digital Video Output up to 4K @ 30 Hz, 4K HDR @ 60 fps
+- **Audio:** 3.5mm Audio Jack
+- **Ethernet:** Single or Dual 10 / 100 / 1000Mbps
+- **Wireless:** 2.4 GHz / 5 Ghz MIMO WiFi 802.11 b/g/n/ac with Bluetooth 5.2 (Realtek RTL8852BU)
+- **Storage:** 128 Mbit (16 MByte) XSPI NOR flash Memory, Bootable microSD (SDHC and SDXC up to 256 GB), Bootable eMMC
+- **USB:** 1 x USB 3.0 Dedicated Host Port, 3 x USB 2.0 Host Ports
+- **Expansion Ports:** PCIe 2.0 x 1 lane, 2 x 20 pins "Pi2" GPIO Header
+- **MIPI DSI Port:** 4-lane MIPI DSI port for LCD Panel
+- **MIPI CSI Port:** 4-lane MIPI CSI port for Camera Module
+
+Serial Console
+==============
+
+A **USB Serial Adapter** (like `CH340G Serial Adapter <https://pine64.com/product/serial-console-woodpecker-edition/>`_)
+is required to run NuttX on Star64.
+
+Connect the USB Serial Adapter to Star64's **GPIO Header** at:
+
+========== ===========
+USB Serial GPIO Header
+========== ===========
+GND        Pin 6 (GND)
+RX         Pin 8 (UART0 TX)
+TX         Pin 10 (UART0 RX)
+========== ===========
+
+On the USB Serial Adapter, set the **Voltage Level** to 3V3.
+
+Connect Star64 to our computer with the USB Serial Adapter.
+On our computer, start a Serial Terminal and connect to the USB Serial Port
+at **115.2 kbps**.
+
+NuttX will appear in the Serial Console when it boots on Star64.
+
+RISC-V Toolchain
+================
+
+Before building NuttX for Star64, download the **RISC-V Toolchain riscv64-unknown-elf**
+from `SiFive RISC-V Tools <https://github.com/sifive/freedom-tools/releases/tag/v2020.12.0>`_.
+
+Add the downloaded toolchain ``riscv64-unknown-elf-toolchain-.../bin``
+to the ``PATH`` Environment Variable.
+
+Check the RISC-V Toolchain:
+
+.. code:: console
+
+   $ riscv64-unknown-elf-gcc -v
+
+Building
+========
+
+To build NuttX for Star64, :doc:`install the prerequisites </quickstart/install>` and
+:doc:`clone the git repositories </quickstart/install>` for ``nuttx`` and ``apps``.
+
+Configure the NuttX project and build the project:
+
+.. code:: console
+
+   $ cd nuttx
+   $ tools/configure.sh star64:nsh
+   $ make
+   $ riscv64-unknown-elf-objcopy -O binary nuttx nuttx.bin
+
+This produces the NuttX Kernel ``nuttx.bin``.  Next, build the NuttX Apps Filesystem:
+
+.. code:: console
+
+   $ make export
+   $ pushd ../apps
+   $ tools/mkimport.sh -z -x ../nuttx/nuttx-export-*.tar.gz
+   $ make import
+   $ popd
+   $ genromfs -f initrd -d ../apps/bin -V "NuttXBootVol"
+
+This generates the Initial RAM Disk ``initrd``.
+
+Download the `Device Tree jh7110-visionfive-v2.dtb <https://github.com/starfive-tech/VisionFive2/releases/download/VF2_v3.1.5/jh7110-visionfive-v2.dtb>`_
+from `StarFive VisionFive2 Software Releases <https://github.com/starfive-tech/VisionFive2/releases>`_
+into the ``nuttx`` folder.
+
+Inside the ``nuttx`` folder, create a Text File named ``nuttx.its``
+with the following content:
+
+::
+
+   /dts-v1/;
+
+   / {
+     description = "NuttX FIT image";
+     #address-cells = <2>;
+
+     images {
+       vmlinux {
+         description = "vmlinux";
+         data = /incbin/("./nuttx.bin");
+         type = "kernel";
+         arch = "riscv";
+         os = "linux";
+         load = <0x0 0x40200000>;
+         entry = <0x0 0x40200000>;
+         compression = "none";
+       };
+
+       ramdisk {
+         description = "buildroot initramfs";
+         data = /incbin/("./initrd");
+         type = "ramdisk";
+         arch = "riscv";
+         os = "linux";
+         load = <0x0 0x46100000>;
+         compression = "none";
+         hash-1 {
+           algo = "sha256";
+         };
+       };
+
+       fdt {
+         data = /incbin/("./jh7110-visionfive-v2.dtb");
+         type = "flat_dt";
+         arch = "riscv";
+         load = <0x0 0x46000000>;
+         compression = "none";
+         hash-1 {
+           algo = "sha256";
+         };
+       };
+     };
+
+     configurations {
+       default = "nuttx";
+
+       nuttx {
+         description = "NuttX";
+         kernel = "vmlinux";
+         fdt = "fdt";
+         loadables = "ramdisk";
+       };
+     };
+   };
+
+Package the NuttX Kernel, Initial RAM Disk and Device Tree into a
+Flat Image Tree:
+
+.. code:: console
+
+   $ sudo apt install u-boot-tools
+   $ mkimage -f nuttx.its -A riscv -O linux -T flat_dt starfiveu.fit
+
+The Flat Image Tree ``starfiveu.fit`` will be copied to a microSD Card
+in the next step.
+
+Booting
+=======
+
+NuttX boots on Star64 via a microSD Card. To prepare the microSD Card, download the
+`microSD Image sdcard.img <https://github.com/starfive-tech/VisionFive2/releases/download/VF2_v3.1.5/sdcard.img>`_
+from `StarFive VisionFive2 Software Releases <https://github.com/starfive-tech/VisionFive2/releases>`_.
+
+Write the downloaded image to a microSD Card with
+`Balena Etcher <https://www.balena.io/etcher/>`_ or 
+`GNOME Disks <https://wiki.gnome.org/Apps/Disks>`_.
+
+Copy the file ``starfiveu.fit`` from the previous section
+and overwrite the file on the microSD Card.
+
+Check that Star64 is connected to our computer via a USB Serial Adapter.
+
+Insert the microSD Card into Star64 and power up Star64.
+NuttX boots on Star64 and NuttShell (nsh) appears in the Serial Console.
+
+To see the available commands in NuttShell:
+
+.. code:: console
+
+   $ help
+
+`Booting NuttX over TFTP <https://lupyuen.github.io/articles/tftp>`_
+is also supported on Star64.
+
+Configurations
+==============
+
+nsh
+---
+
+Basic configuration that runs NuttShell (nsh).
+This configuration is focused on low level, command-line driver testing.
+Built-in applications are supported, but none are enabled.
+Serial Console is enabled on UART0 at 115.2 kbps.
+
+Peripheral Support
+==================
+
+NuttX for PinePhone supports these peripherals:
+
+======================== ======= =====
+Peripheral               Support NOTES
+======================== ======= =====
+UART                     Yes
+======================== ======= =====

Documentation/platforms/risc-v/jh7110/index.rst

@@ -0,0 +1,29 @@
+===============
+StarFive JH7110
+===============
+
+`StarFive JH7110 <https://doc-en.rvspace.org/Doc_Center/jh7110.html>`_ is a 64-bit RISC-V SoC that features:
+
+- **CPU:** SiFive RISC-V U74 Application Cores (4 cores, RV64GCB) and SiFive RISC-V S7 Monitor Core (single core, RV64IMACB)
+- **GPU:** Imagination Technology BXE-4-32
+- **RAM:** 32-bit LPDDR4 / DDR4 / LPDDR3 / DDR3
+- **Video Decoder:** 4K @ 30 fps multi-stream for H.264/H.265
+- **Video Encoder:** 1080p @ 30 fps multi-stream for H.265
+- **Video Input:** 1 x DVP and 1 x MIPI-CSI with 4D1C
+- **Video Output:** MIPI DSI with 4D1C
+- **HDMI:** 1 x HDMI 2.0 port display up to 4K @ 30 fps
+- **Parallel Interface:**: 24-bit RGB parallel interface
+- **PCIe:** 2 x PCIe 2.0, 1 lane
+- **USB:** USB 3.0 Host / Device
+- **Ethernet:** 2 x Ethernet MAC 1,000 Mbps, 2 x CAN 2.0B
+- **Security:** TRNG, OTP
+- **Peripherals:** UART, I2C, SPI, SDIO, DPI, PCM / I2S, Timers, Temperature Sensor, INTC, PWM, WDT, GPIO, DVP, GPCLK
+
+Supported Boards
+================
+
+.. toctree::
+   :glob:
+   :maxdepth: 1
+
+   boards/*/*

arch/risc-v/Kconfig

@@ -189,6 +189,26 @@ config ARCH_CHIP_HPM6750
 	---help---
 		Hpmicro HPM6750 processor (D45 RISC-V Core with MAC extensions).
 
+config ARCH_CHIP_JH7110
+	bool "StarFive JH7110"
+	select ARCH_RV64
+	select ARCH_RV_ISA_M
+	select ARCH_RV_ISA_A
+	select ARCH_RV_ISA_C
+	select ARCH_HAVE_FPU
+	select ARCH_HAVE_DPFPU
+	select ARCH_HAVE_MULTICPU
+	select ARCH_HAVE_MPU
+	select ARCH_HAVE_MMU
+	select ARCH_MMU_TYPE_SV39
+	select ARCH_HAVE_ADDRENV
+	select ARCH_NEED_ADDRENV_MAPPING
+	select ARCH_HAVE_S_MODE
+	select ONESHOT
+	select ALARM_ARCH
+	---help---
+		StarFive JH7110 SoC.
+
 config ARCH_CHIP_RISCV_CUSTOM
 	bool "Custom RISC-V chip"
 	select ARCH_CHIP_CUSTOM
@@ -238,6 +258,7 @@ config ARCH_CHIP
 	default "rv32m1"	if ARCH_CHIP_RV32M1
 	default "qemu-rv"	if ARCH_CHIP_QEMU_RV
 	default "hpm6750"	if ARCH_CHIP_HPM6750
+	default "jh7110"	if ARCH_CHIP_JH7110
 
 config ARCH_RISCV_INTXCPT_EXTENSIONS
 	bool "RISC-V Integer Context Extensions"
@@ -423,4 +444,7 @@ endif
 if ARCH_CHIP_HPM6750
 source "arch/risc-v/src/hpm6750/Kconfig"
 endif
+if ARCH_CHIP_JH7110
+source "arch/risc-v/src/jh7110/Kconfig"
+endif
 endif

arch/risc-v/include/jh7110/chip.h

@@ -0,0 +1,24 @@
+/****************************************************************************
+ * arch/risc-v/include/jh7110/chip.h
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __ARCH_RISCV_INCLUDE_JH7110_CHIP_H
+#define __ARCH_RISCV_INCLUDE_JH7110_CHIP_H
+
+#endif /* __ARCH_RISCV_INCLUDE_JH7110_CHIP_H */

arch/risc-v/include/jh7110/irq.h

@@ -0,0 +1,36 @@
+/****************************************************************************
+ * arch/risc-v/include/jh7110/irq.h
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __ARCH_RISCV_INCLUDE_JH7110_IRQ_H
+#define __ARCH_RISCV_INCLUDE_JH7110_IRQ_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* Map RISC-V exception code to NuttX IRQ */
+
+#define NR_IRQS (RISCV_IRQ_SEXT + 127)
+
+#endif /* __ARCH_RISCV_INCLUDE_JH7110_IRQ_H */