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Aspeed family boards (``*-bmc``, ``ast2500-evb``, ``ast2600-evb``)
==================================================================
The QEMU Aspeed machines model BMCs of various OpenPOWER systems and
Aspeed evaluation boards. They are based on different releases of the
Aspeed SoC : the AST2400 integrating an ARM926EJ-S CPU (400MHz), the
AST2500 with an ARM1176JZS CPU (800MHz) and more recently the AST2600
with dual cores ARM Cortex-A7 CPUs (1.2GHz).
The SoC comes with RAM, Gigabit ethernet, USB, SD/MMC, USB, SPI, I2C,
etc.
AST2400 SoC based machines :
- ``palmetto-bmc`` OpenPOWER Palmetto POWER8 BMC
- ``quanta-q71l-bmc`` OpenBMC Quanta BMC
AST2500 SoC based machines :
- ``ast2500-evb`` Aspeed AST2500 Evaluation board
- ``romulus-bmc`` OpenPOWER Romulus POWER9 BMC
- ``witherspoon-bmc`` OpenPOWER Witherspoon POWER9 BMC
- ``sonorapass-bmc`` OCP SonoraPass BMC
- ``swift-bmc`` OpenPOWER Swift BMC POWER9
AST2600 SoC based machines :
- ``ast2600-evb`` Aspeed AST2600 Evaluation board (Cortex-A7)
- ``tacoma-bmc`` OpenPOWER Witherspoon POWER9 AST2600 BMC
Supported devices
-----------------
* SMP (for the AST2600 Cortex-A7)
* Interrupt Controller (VIC)
* Timer Controller
* RTC Controller
* I2C Controller
* System Control Unit (SCU)
* SRAM mapping
* X-DMA Controller (basic interface)
* Static Memory Controller (SMC or FMC) - Only SPI Flash support
* SPI Memory Controller
* USB 2.0 Controller
* SD/MMC storage controllers
* SDRAM controller (dummy interface for basic settings and training)
* Watchdog Controller
* GPIO Controller (Master only)
* UART
* Ethernet controllers
* Front LEDs (PCA9552 on I2C bus)
* LPC Peripheral Controller (a subset of subdevices are supported)
* Hash/Crypto Engine (HACE) - Hash support only. TODO: HMAC and RSA
Missing devices
---------------
* Coprocessor support
* ADC (out of tree implementation)
* PWM and Fan Controller
* Slave GPIO Controller
* Super I/O Controller
* PCI-Express 1 Controller
* Graphic Display Controller
* PECI Controller
* MCTP Controller
* Mailbox Controller
* Virtual UART
* eSPI Controller
* I3C Controller
Boot options
------------
The Aspeed machines can be started using the ``-kernel`` option to
load a Linux kernel or from a firmware. Images can be downloaded from
the OpenBMC jenkins :
https://jenkins.openbmc.org/job/ci-openbmc/lastSuccessfulBuild/distro=ubuntu,label=docker-builder
or directly from the OpenBMC GitHub release repository :
https://github.com/openbmc/openbmc/releases
The image should be attached as an MTD drive. Run :
.. code-block:: bash
$ qemu-system-arm -M romulus-bmc -nic user \
-drive file=obmc-phosphor-image-romulus.static.mtd,format=raw,if=mtd -nographic
Options specific to Aspeed machines are :
* ``execute-in-place`` which emulates the boot from the CE0 flash
device by using the FMC controller to load the instructions, and
not simply from RAM. This takes a little longer.
* ``fmc-model`` to change the FMC Flash model. FW needs support for
the chip model to boot.
* ``spi-model`` to change the SPI Flash model.
For instance, to start the ``ast2500-evb`` machine with a different
FMC chip and a bigger (64M) SPI chip, use :
.. code-block:: bash
-M ast2500-evb,fmc-model=mx25l25635e,spi-model=mx66u51235f
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