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Nuvoton iBMC boards (``npcm750-evb``, ``quanta-gsj``)
=====================================================
The `Nuvoton iBMC`_ chips (NPCM7xx) are a family of ARM-based SoCs that are
designed to be used as Baseboard Management Controllers (BMCs) in various
servers. They all feature one or two ARM Cortex-A9 CPU cores, as well as an
assortment of peripherals targeted for either Enterprise or Data Center /
Hyperscale applications. The former is a superset of the latter, so NPCM750 has
all the peripherals of NPCM730 and more.
.. _Nuvoton iBMC: https://www.nuvoton.com/products/cloud-computing/ibmc/
The NPCM750 SoC has two Cortex-A9 cores and is targeted for the Enterprise
segment. The following machines are based on this chip :
- ``npcm750-evb`` Nuvoton NPCM750 Evaluation board
The NPCM730 SoC has two Cortex-A9 cores and is targeted for Data Center and
Hyperscale applications. The following machines are based on this chip :
- ``quanta-gsj`` Quanta GSJ server BMC
There are also two more SoCs, NPCM710 and NPCM705, which are single-core
variants of NPCM750 and NPCM730, respectively. These are currently not
supported by QEMU.
Supported devices
-----------------
* SMP (Dual Core Cortex-A9)
* Cortex-A9MPCore built-in peripherals: SCU, GIC, Global Timer, Private Timer
and Watchdog.
* SRAM, ROM and DRAM mappings
* System Global Control Registers (GCR)
* Clock and reset controller (CLK)
* Timer controller (TIM)
* Serial ports (16550-based)
* DDR4 memory controller (dummy interface indicating memory training is done)
* OTP controllers (no protection features)
* Flash Interface Unit (FIU; no protection features)
* Random Number Generator (RNG)
* USB host (USBH)
* GPIO controller
* Analog to Digital Converter (ADC)
* Pulse Width Modulation (PWM)
* SMBus controller (SMBF)
* Ethernet controller (EMC)
* Tachometer
Missing devices
---------------
* LPC/eSPI host-to-BMC interface, including
* Keyboard and mouse controller interface (KBCI)
* Keyboard Controller Style (KCS) channels
* BIOS POST code FIFO
* System Wake-up Control (SWC)
* Shared memory (SHM)
* eSPI slave interface
* Ethernet controller (GMAC)
* USB device (USBD)
* Peripheral SPI controller (PSPI)
* SD/MMC host
* PECI interface
* PCI and PCIe root complex and bridges
* VDM and MCTP support
* Serial I/O expansion
* LPC/eSPI host
* Coprocessor
* Graphics
* Video capture
* Encoding compression engine
* Security features
Boot options
------------
The Nuvoton machines can boot from an OpenBMC firmware image, or directly into
a kernel using the ``-kernel`` option. OpenBMC images for `quanta-gsj` and
possibly others can be downloaded from the OpenPOWER jenkins :
https://openpower.xyz/
The firmware image should be attached as an MTD drive. Example :
.. code-block:: bash
$ qemu-system-arm -machine quanta-gsj -nographic \
-drive file=image-bmc,if=mtd,bus=0,unit=0,format=raw
The default root password for test images is usually ``0penBmc``.
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