Difference between revisions of "RZ-G/RZG2 arm trusted firmware"

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= RZ/G2 ARM Trusted Firmware =
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{{TOC right|width=50%}}
 
 
 
= Locations for each code section =
 
 
 
'''File containing #defines'''
 
 
 
If you look in file sa6.c, you will find the #defines for all the flash locations for both SPI boot and eMMC boot.
 
* arm-trusted-firmware/tools/dummy_create/sa6.c
 
 
 
'''eMMC partitions'''
 
 
 
All eMMC devices contain 3 separate Flash sections: 2 boot partitions and 1 main flash area. 
 
 
 
The partitions are selected as part of the eMMC command protocols.
 
 
 
The boot partitions are usually about 4MB each.
 
 
 
 
By default, the RZ/G2 BSP places the IPL (arm-trusted-firmware) in eMMC boot partition 1 and u-boot in eMMC boot partition 2. However, you can place both the IPL and u-boot in the same partition if you really wanted to (boot partition 1) and leave boot partition 2 blank (or do something else with it).
 
 
 
However it should be noted that the u-boot for the HiHope board is set up to use boot partition 2 for its environment variable area.
 
 
 
= Hardware setup code =
 
 
 
Since arm-trusted-firmware is the first software to run after RESET, a minimal set of peripherals need to be configured and used.
 
 
 
Some required configurations are as follows:
 
* PFC: For pin control setting to change from default GPIO pins to peripheral pins
 
* DBSC4, AXI: For memory DDR setting, and QoS setting
 
* GPIO, I2C: For controlling PMIC
 
* SCIF: For output message to debug serial
 
* WDT: If timeout detection is being used
 
* CPG: For enabling above modules
 
* SPI: If the bootloader images are stored in SPI flash
 
* SDHI, MMC: If the bootloader images are stored in SD card or eMMC.
 

Latest revision as of 12:02, 23 July 2021

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