![]() FII RISC-V3.Performance Evaluation of FII RISC-V3.01 on FII-PRX100-D (ARTIX-7, XC7A100T) XILINX FPGA Board I have everything pretty much working, except that when the kernel is booted, U-Boot is ignoring the device tree in the FIT image and instead passing its own one - based on the value of fdtaddr ( 0x11000000): Hit any key to stop autoboot: 0 reading uImage 3346230 bytes read in 100 ms (31.9 MiB/s) Loading kernel from FIT Image at 18000000.Where blk is the start of where you want to erase, and cnt is the amount to be erased. The size reserved for U-Boot environment is 8kB in our default bootloader configuration which resides at the end of the boot partition. The formatting is as follows: mmc erase blk# cnt Mmc erase is used to erase specified sectors in MMC. Note that you should never write to the first two sectors of SD cards or EMMC as it stores important partition data. Where addr is the DRAM starting address of the data you want to write to MMC, blk is the MMC starting address to be written to, and cnt is the size to be written. The formatting is as follows: mmc write addr blk# cnt Mmc read is used to read data from MMC devices. Next, we will use the following code to view the SD card partition. We can use mmc part to view all these partitions, but first we will need to make sure we are on the SD card by using the following code: mmc dev 0 Note that sometimes SD cards or EMMC may have multiple partitions. If part is left blank, it will default to partition 0. Where dev is used to specify the MMC device to switch to, and part is the partition. U-Boot does the same thing for the amount of memory detected. In the Wandboards default environment, there are two variables related to. U-Boot has a built-in fixup function to copy the first mac address into the device tree structure. There is a complete list in Documentation/kernel-parameters.txt. The mmc dev command is used to change and set the current MMC device. The U-Boot bootloader offers the fdt command to interact with a device tree blob. the case of U-Boot it can also be defined in the device tree or set as part of the. Note that SD cards will always be set as the current MMC device by default. We can see that we currently have one MMC device on our development board, which is 0 (SD). Mmc list is used to check the number of MMC devices that are currently connected to the SD card. Mmc rescan is used to scan MMC devices on the current development board. We can see that the current MMC device is a SD card, with the version number being 3.0, and having a capacity of 14.7 GiB, along with other information. The command is used directly without any other components. Mmc info is mainly used to return the device information of the selected MMC. This article talks about the U-Boot EMMC and SD card operation commands that are used most commonly.įor related subjects, please refer to the SOC Table of Contents. ![]() Linux based Application and Development.
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