|
|
| Line 1: |
Line 1: |
| − | = RZ/G2 ARM Trusted Firmware =
| + | this page can be deleted |
| − | {{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.
| |
