Changes between Version 12 and Version 13 of newport/firmware

Timestamp:

04/05/2019 08:21:06 PM (6 years ago)

Author:

Tim Harvey

Comment:

added note about creating FIT Image from kernel

newport/firmware

@@ -142 +142 @@
 
 ==== Updating just the kernel ====
-Updating just the kernel can be done with {{{tftpboot}}} and {{{fatwrite}}}:
+Updating the kernel requires you first have a U-Boot FIT Image {{{kernel.itb}}} which can be created from a non-compressed kernel image (arch/arm64/boot/Image) with the U-Boot {{{mkimage}}} application and a FIT Image template (.its) file:
+{{{#!bash
+# use the mkits.sh script from the Newport BSP to create an its file that points to your compressed kernel
+cp linux/arch/arm64/boot/Image vmlinuz
+gzip -f vmlinuz
+./newport/mkits.sh -o kernel.its -k vmlinux.gz -C gzip -v "My Kernel"
+mkimage -f kernel.its kernel.itb
+}}}
+ * more information can be found on FIT images [wiki:newport/bootloader#fit here]
+ * Note that ARM64 Linux does not support self-extracting compressed kernels which is why we use a FIT image which allows U-Boot to do the decompression and data verification.
+
+Updating just the kernel.itb (FIT Image) can be done with {{{tftpboot}}} and {{{fatwrite}}}:
 {{{#!bash
 # kernel