Boot Sequence for SD-Boot - 2024.2 English - UG1209

Now that all the individual images are ready, create the boot image to load all of these components on the Zynq UltraScale+ device. This can be done using the Create Boot Image wizard in the Vitis IDE by performing the following steps.

1. Launch the Create Boot Image wizard in the Vitis IDE:

   • In the Vitis IDE, select Vitis → Create Boot Image.

   • Select Zynq Ultrascale+

2. Select all the partitions referred to in earlier sections in this chapter, and set them as shown in the following figure.

   

3. Add the FSBL partition:

   1. In the Create Boot Image wizard, click the + button to open the Add Partition view.

   2. In the Add Partition view, click Browse to select the FSBL executable.

   3. For FSBL, ensure that the partition type is selected as boot loader and the correct destination CPU is selected by the tool. The tool is configured to make this selection based on the FSBL executable.

      Note

      Ignore the Exception Level drop down, because FSBL is set to EL3 by default. Also, leave the TrustZone setting unselected for this example.

      

   4. Click OK to select FSBL and go back to Create Boot Image wizard.

4. Add the PMU and TF-A firmware partitions:

   1. Click the + button to open the Add Partition view, shown in the following figure.

      

   2. Add the PMU firmware partition.

   3. Browse to and select the PMU Firmware executable.

   4. For this partition, select pmufw_image as the partition type.

   5. Leave the Exception Level and TrustZone settings unselected.

   6. Click OK.

   7. Click Add to open the Add Partition view.

   8. Add the TF-A firmware bl31.elf partition.

      Note

      TF-A Firmware (bl31.elf) can be found in <PetaLinux Project>/image/linux/.

      1. For this partition, select datafile as the partition type.

      2. Set the Destination Device as PS.

      3. Set the Destination CPU as A53 0.

      4. Set the Exception Level to EL3 and select Enable TrustZone.

      

   9. Click OK.

5. Add the R5 executable and enable it in lockstep mode.

   1. Click Add to add the Cortex-R5F bare-metal executable.

      

   2. Set the Destination Device as PS.

   3. Set the Destination CPU as R5 Lockstep. This sets the RPU R5 cores to run in lockstep mode.

   4. Leave Exception Level and TrustZone unselected.

   5. Click OK.

6. Now, add the U-Boot partition. You can find u-boot.elf for sd_boot mode in <PetaLinux_project>/images/linux/sd_boot.

   1. Click Add to add the u-boot.elf partition.

   2. For U-Boot, select the Destination Device as PS.

   3. Select the Destination CPU as A53 0.

   4. Set the Exception Level to EL2.

      

   5. Click OK to return to the Create Boot Image wizard.

   6. Click Create Image to close the wizard and create the boot image.

You can also create BOOT.bin images using the BIF attributes and the Bootgen command. For this configuration, the BIF file contains the following attributes:

//arch = zynqmp; split = false; format = BIN
the_ROM_image:
{
[bootloader, destination_cpu = a53-0]C:\edt\fsbl_a53\Debug\fsbl_a53.elf
[pmufw_image]C:\edt\edt_zcu102_wrapper\export\edt_zcu102_wrapper\sw\edt_zcu102_wrapper\boot\pmufw.elf
[destination_cpu = a53-0, exception_level = el-3, trustzone]C:\edt\sd_boot\bl31.elf
[destination_cpu = r5-lockstep]C:\edt\testapp_r5\Debug\testapp_r5.elf
[destination_cpu = a53-0, exception_level = el-2]C:\edt\sd_boot\u-boot.elf
}

The Vitis IDE calls the following Bootgen command to generate the BOOT.bin image for this configuration:

bootgen -image sd_boot.bif -arch zynqmp -o C:\edt\sd_boot\BOOT.bin