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--- hw:zynq:linux:petalinux:boot_kernel [2019/03/20 11:50]
jakub.moron
+++ hw:zynq:linux:petalinux:boot_kernel [2021/04/21 14:57] (current)
jakub.moron
@@ Line 1: / Line 1: @@
-====== Boot and Kernel configure & build with PetaLinux without BSP (board support package)  ======
+====== Boot and Kernel configure & build with PetaLinux 2018.3 without BSP (board support package)  ======
   - Create Vivado design and export the hardware with bitstream.\\ Default hdf (hardware description file) location is: <code>
@@ Line 10: / Line 10: @@
 petalinux-create --type project --template zynq --name <boot_project_name>
 cd <boot_project_name>
+</code> For UltraScale+: <code>
+petalinux-create -t project --template zynqMP --name <boot_project_name>
 </code>
   - Get hardware description from Vivado project: <code>
-petalinux-config --get-hw-description=<absolute_path_to_vivado_project_directory>/<project_name>.sdk/
+petalinux-config --get-hw-description <path_to_vivado_project_directory>/<project_name>.sdk/
 </code>
   - Set booting from SD card by navigating through settings tree and choosing the proper options: <code>
@@ Line 19: / Line 21: @@
                                                                               -> dtb image settings   : set ‘image storage media’ option to ‘primary sd’
 Image Packaging Configurations: set ‘Root filesystem type’ option to ‘SD card’
-</code> Select ''Exit'' and write the configuration.\\ In case you want to reconfigure boot settings, run: <code>
+                              : uncheck 'Copy final images to tfpboot'
+</code> Select ''Exit'' to write the configuration.\\ \\ In case you want to reconfigure boot settings, run: <code>
 petalinux-config
 </code>
-  - Build the boot and kernel files: <code>
+  - Check whether all required drivers/modules are enabled in kernel config: <code>
+petalinux-config -c kernel
+</code> Hint: you can use vim-like search ''/<search_string>'' to list all enabled drivers/modules.\\ **Remember to __Save__ changes before exit -- it seems that there is no autosave!** \\
+  - In order to use the generic UIO driver ''uio_pdrv_genirq'' enable kernel modules in kernel config: <code>
+petalinux-config -c kernel
+</code> by navigating through settings tree and enabling modules (there should be '<M>', not '<*>'): <code>
+Device Drivers -> <*> Userspace I/O drivers -> <M> Userspace I/O platform driver with generic IRQ handling
+                                               <M> Userspace platform driver with generic irq and dynamic memory
+</code>
+  - In order to use the generic UIO driver modify the device tree to assign the compatibility with this driver to your hardware: <code>
+vim ./project-spec/meta-user/recipes-bsp/device-tree/files/system-user.dtsi
+</code> and add the entry at the end of this file: <code>
+&axi_gpio_0 {
+	compatible = "generic-uio";
+};
+</code> for every hardware module you have.\\ Please notice that ''axi_gpio_0'' __is only an example__ of module name!
+  - Fix the u-boot bug -- a typo in default boot command.\\ The proper boot configure entry: <code>
+default_bootcmd=run uenvboot; run cp_kernel2ram && bootm ${netstart}
+</code> is created by PetaLinux as <code>
+default_bootcmd=run uenvboot; run cp_kernel2ram && run cp_dtb2ram && booti ${netstart} - ${dtbnetstart}
+</code> with the typo in ''booti'' instead of ''bootm'' command.\\ \\ To fix this bug, edit the ''platform-top.h'' file (it would not be overwrite if you reconfigure the boot or kernel): <code>
+vim ./project-spec/meta-user/recipes-bsp/u-boot/files/platform-top.h
+</code> and add the following entry at the end: <code>
+/* Due to a bug where having u-boot load dtb from SD card causes the boot
+ * command to default to using booti instead of bootm on Zynq, the defult build
+ * fails to boot. This boot command override is a temporary workaround.
+*/
+#ifdef CONFIG_BOOTCOMMAND
+#undef CONFIG_BOOTCOMMAND
+#define CONFIG_BOOTCOMMAND	"run uenvboot; run cp_kernel2ram && run cp_dtb2ram && bootm ${netstart} - ${dtbnetstart}"
+#endif
+</code>
+  - Build the boot and kernel: <code>
 petalinux-build
 </code>
   - Determinate the bit file name in PetaLinux project (it is copied automatically from Vivado design by ''--get-hw-description''): <code>
-ls ./images/linux/*.bin
+ls ./images/linux/*.bit
 </code>
   - Create ''BOOT.BIN'' image: <code>
 petalinux-package --boot --format BIN --fsbl ./images/linux/zynq_fsbl.elf --fpga ./images/linux/<bit_filename>.bit --u-boot
 </code>

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