![]() ![]() Include kernel patches to fix reported bugs. Release a new kernel they increment this number. The '.0' allows for additional Linux releases to fix problems,īut normally this is not needed. You can find the source code for this in the Linux tree with The numbers after the end of each file are the version. Of drivers for whatever hardware you might have. Into RAM and will appear to Linux like a disk. Self-extracting compressed file mixed with some 'setup' configuration data.ĭespite its size (uncompressed it is >10MB) this only includes a basic set ofĭevice drivers, enough to boot on most hardware types. The 'vmlinuz' files contain a packaged Linux kernel. It isĪnd if you look in the /boot directory you will see the kernel: => ext2ls scsi 0:2 /bootĥ825048 vmlinuz-3.13. Partition 2 is 'Linux filesystem data' so that will be our root disk. VFAT format (DOS/Windows): => fatls scsi 0:1 On this disk the first partition is for EFI and is in Strings are called Globally Unique Identifiers (GUIDs). This shows that your SCSI disk has three partitions. Partition Map for SCSI device 0 - Partition Type: EFI For example our disk is SCSI device 0: => part list scsi 0 Use the U-Boot command line to find the UUID of the partition you want toīoot. That you used another boot loader to install Ubuntu. Possible to make U-Boot start a USB start-up disk but for now let's assume If you figure these out, please post patches to this README.įirstly, you will need Ubuntu installed on an available disk. It could also use the grub.cfg file (/efi/ubuntu/grub.cfg) to obtain the Note: It is possible to set up U-Boot to boot automatically using syslinux. Very simple script, but a more detailed explanation is provided here for There are really only four steps and it's a Tested on Minnowboard MAX with a SATA drive but are equally applicable on Instructions for starting Ubuntu from U-Boot. Booting UbuntuĪs an example of how to set up your boot flow with U-Boot, here are U-Boot sets up some reasonable values but you canĪdjust then with this command. Tell the CPU whether memory is cacheable and if so the cache write iod Display I/O memory iow Write I/O memory mtrr List and set the Memory Type Range Registers (MTRR). This is only available on platforms which use FSP, mostly Atom. Useful: fsp Display information about Intel Firmware Support Package (FSP). In keeping with the U-Boot philosophy of providing functions to check andĪdjust internal settings, there are several x86-specific commands that may be Check out the directoryĪrch/x86/dts/ for these device tree source files. More and more devices will be added as time goes by. Not every device on the board is configured via device tree, but X86 uses device tree to configure the board thus requires CONFIG_OF_CONTROL toīe turned on. X86 has been converted to use driver model for serial, GPIO, SPI, SPI flash, Options GENERATE_SFI_TABLE and GENERATE_MP_TABLE. The writing of these two tables are controlled by two Kconfig Currently U-Boot supports generating two types of tablesįor SMP, called Simple Firmware Interface ( SFI) and Multi-Processor ( MP) Prepare configuration tables which contain the multi-CPUs information before Have an SMP kernel to discover all of the available processors, U-Boot needs to ![]() On a multicore system, U-Boot is executed on the bootstrap processor (BSP).Īdditional application processors (AP) can be brought up by U-Boot. Has already integrated these as hex dumps in the source tree. Loaded on the processor after power up in order to function properly. Modern CPUs usually require a special bit stream called microcode to be Print some warnings if required binary blobs (e.g.: FSP) are not present. Due to this reason, the u-boot.rom build may Little bit tricky, as generally it requires several binary blobs which are not Build Instructions for U-Boot as BIOS replacement (bare mode)īuilding a ROM version of U-Boot (hereafter referred to as u-boot.rom) is a Please check README.vxworksįor more details. U-Boot supports loading an x86 VxWorks kernel. The following platformsĪs for loading an OS, U-Boot supports directly booting a 32-bit or 64-bit 'bare metal', U-Boot acts like a BIOS replacement. In this case, known as bare mode, from the fact that it runs on the U-Boot also supports booting directly from x86 reset vector, without coreboot. U-Boot is a main bootloader on Intel Edison board. Work with minimal adjustments on other x86 boards since coreboot deals with (Chromebook Pixel) and QEMU x86 targets have been tested, but it should U-Boot supports running as a coreboot payload on x86. Including supported boards, build instructions, todo list, etc. This document describes the information about U-Boot running on x86 targets, ![]()
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