Changes between Version 35 and Version 36 of buildroot

Timestamp:

12/10/2020 11:51:21 PM (4 years ago)

Author:

Tim Harvey

Comment:

add venice section

buildroot

@@ -202 +202 @@
 
 
+[=#venice]
+== Venice (IMX8MM)
+The following details pertain to buildroot 2018.10 although newer versions will likely be similar if not the same.
+
+The Venice product family is based on the i.MX8MM SoC which has 4x Cortex-A53 CPU cores. Therefore the 'BR2_aarch64' is really the only important configuration which produces binaries executable on arm64 CPU's.
+
+To build a root filesystem only:
+{{{#!bash
+cat << EOF > configs/venice_minimal_defconfig
+# arm64 arch
+BR2_aarch64=y
+# filesystem options
+BR2_TARGET_ROOTFS_TAR_XZ=y
+EOF
+make venice_minimal_defconfig
+make
+}}}
+
+This builds output/images/root.tar.xz consisting of a ~1.7MiB root filesystem (when uncompressed) in 5 to 10 minutes of building on a typical Linux desktop.
+
+If you also want buildroot to build a Gateworks v5.4.45 kernel with the minimal root filesystem attached as an initrd you would add the following the your defconfig:
+{{{#!bash
+cat << EOF > configs/venice_kernel_defconfig
+# arm64 arch
+BR2_aarch64=y
+# toolchain
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_4=y
+# kernel
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_CUSTOM_GIT=y
+BR2_LINUX_KERNEL_CUSTOM_REPO_URL="https://github.com/Gateworks/linux-venice.git"
+BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="v5.4.45-venice"
+BR2_LINUX_KERNEL_DEFCONFIG="imx8mm_venice"
+# filesystem options
+BR2_TARGET_ROOTFS_TAR_XZ=y
+EOF
+make venice_kernel_defconfig
+make
+}}}
+
+This produces a ~23MB output/images/Image in 5 to 10 minutes of building on a typical Linux desktop. This is a kernel Image containing the root filesystem in a ramdisk. This is a really easy way to get a read-only minimal Linux image that boots fast and does not access flash storage.
+
+To boot this kernel image on a Venice board via the bootloader with a tftpserver:
+{{{#!bash
+tftpboot $kernel_addr_r Image && booti $kernel_addr_r - $fdtcontroladdr
+}}}
+
+Now you have a minimal Linux OS that booted in about 6 seconds.
+
+A prebuilt image can be found [http://dev.gateworks.com/buildroot/venice/minimal here] which contains:
+ * Gateworks Linux 5.4.45 kernel
+ * resize2fs (BR2_PACKAGE_E2FSPROGS_RESIZE2FS)
+ * uclibc
+ * screen (BR2_PACKAGE_SCREEN)
+ * pciutils (BR2_PACKAGE_PCIUTILS)
+ * libusb (BR2_PACKAGE_LIBUSB)
+ * eudev (BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV) (required for usbutils)
+ * usbutils (BR2_PACKAGE_USBUTILS) 
+ * gdisk/sgdisk disk partitioning tools:
+  - gdisk/sgdisk (BR2_PACKAGE_GPTFDISK/BR2_PACKAGE_GPTFDISK_SGDISK)
+ * stress (BR2_PACKAGE_STRESS)
+ * evtest (BR2_PACKAGE_EVTEST)
+
+You can boot a Kernel+ramdisk via U-Boot like this:
+ * load from network tftpserver
+{{{#!bash
+tftpboot $kernel_addr_r Image && booti $kernel_addr_r - $fdtcontroladdr
+}}}
+ * load from microSD with ext/fat filesystem
+{{{#!bash
+load mmc 1:1 $kernel_addr_r Image && booti $kernel_addr_r - $fdtcontroladdr
+}}}
+ * load from USB with ext/fat filesystem
+{{{#!bash
+usb start; load usb 0:1 $kernel_addr_r Image && booti $kernel_addr_r - $fdtcontroladdr
+}}}
+
 [=#newport]
 == Newport (CN80XX)
@@ -224 +301 @@
 
 This builds a ~500KiB output/images/root.tar.xz in less than 5 minutes on a typical Linux desktop.
- 
 
 If you also want buildroot to build a kernel provided from buildroot using the buildroot rootfs embedded as an initramfs then enable the following to create a kernel suitable for aarch64 and booting via U-Boot {{{booti}}}: