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Why does Linux run so well on ARM
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this post was submitted on 20 Aug 2023
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[This comment has been deleted by an automated system]
The issue with Arm is they aren't all one board/chip, you have ARM based design licenced from them and they are built to meet the criteria of what the customer requires. i.e. for my iomega NAS there isn't firmware boot, you just have to generate an empty section of 00s on the first 32bytes of the drive so the board knows that is the drive to load the kernel from (no grub no uboot) and the board is set to do the rest from the next partition.
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Booting isn't the only problem with ARM. Instead of saving information about builtin devices on the board and exposing it via ACPI, board manufacturers create a devicetree and ship it with the kernel. This means that if you want to run your own kernel you need to build your own devicetree
But all x86 instructions are the same right, thus why it doesnt matter what era your chip is from or what manufacturer, arm can be very different
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Thanks for the info, I appreciate the reply