The AM642 SoCs use the Main R5FSS0 as a boot processor, and runs
the R5 SPL that performs the initialization of the System Controller
processor and starting the Arm Trusted Firmware (ATF) on the Arm
Cortex A53 cluster. The Core0 serves as this boot processor and is
parked in WFE after all the initialization. Core1 does not directly
participate in the boot flow, and is simply parked in a WFI.
Power down these R5 cores (and the associated RTI timer resources
that were indirectly powered up) after starting up ATF on A53 by
using the appropriate SYSFW API in release_resources_for_core_shutdown().
This allows these Main R5F cores to be further controlled from the
A53 to run regular applications.
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Use the System Firmware (SYSFW) loader framework to load and start
the SYSFW as part of the AM642 early initialization sequence. Also
make use of existing logic to detect if ROM has already loaded sysfw
and avoided attempting to reload and instead just prepare to use already
running firmware.
While at it also initialize the MAIN_UART1 pinmux as it is used by SYSFW
to print diagnostic messages.
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
For AM642, ROM supports loading system firmware directly
from boot image. ROM passes information about the number of
images that are loaded to bootloader at a specific address
that is temporary. Add support for storing this information
somewhere permanent before it gets corrupted.
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
To access various control MMR functionality the registers need to
be unlocked. Do that for all control MMR regions in the MAIN domain.
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
AM642 allows for booting from primary or backup boot media.
Both media can be chosen individually based on switch settings.
ROM looks for a valid image in primary boot media, if not found
then looks in backup boot media. In order to pass this boot media
information to boot loader, ROM stores a value at a particular
address. Add support for reading this information and determining
the boot media correctly.
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
The AM642 SoC belongs to the K3 Multicore SoC architecture platform,
providing advanced system integration to enable applications such as
Motor Drives, PLC, Remote IO and IoT Gateways.
Some highlights of this SoC are:
* Dual Cortex-A53s in a single cluster, two clusters of dual Cortex-R5F
MCUs, and a single Cortex-M4F.
* Two Gigabit Industrial Communication Subsystems (ICSSG).
* Integrated Ethernet switch supporting up to a total of two external
ports.
* PCIe-GEN2x1L, USB3/USB2, 2xCAN-FD, eMMC and SD, UFS, OSPI memory
controller, QSPI, I2C, eCAP/eQEP, ePWM, ADC, among other
peripherals.
* Centralized System Controller for Security, Power, and Resource
Management (DMSC).
See AM64X Technical Reference Manual (SPRUIM2, Nov 2020)
for further details: https://www.ti.com/lit/pdf/spruim2
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
