38 lines
2.1 KiB
Plaintext
38 lines
2.1 KiB
Plaintext
#=----------------------------------------------------------------------------=#
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# OS on Kaleid Documentation #
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# #
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# Desc: OS/K Loader #
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# #
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# #
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# Copyright © 2018-2020 The OS/K Team #
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# #
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# Permission is granted to copy, distribute and/or modify this #
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# document under the terms of the GNU Free Documentation License, #
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# Version 1.3 or any later version published by the Free Software #
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# Foundation; with no Invariant Sections, no Front-Cover Texts, and #
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# no Back-Cover Texts. A copy of the license is included in the #
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# file entitled "COPYING.GFDL" #
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#=----------------------------------------------------------------------------=#
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This folder contains the source for OS/K's early loader.
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OS/K being intended to only run on x86-64 systems, we have not divided
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this folder into one sub-folder per architecture.
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The bootloader itself is external to the OS/K project. We are using GRUB 2
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to load our kernel loader in memory.
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The kernel loader, that we call the loader, is the main subject of this
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folder. This loader is linked whith the kernel and loaded by Grub at the
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specified address and prepare it for the hard work it have to do :
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- Check the multiboot state.
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- Check if CPUID and long mode is supported.
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- Send a structure for it with memory map, cpu infos, and other devices
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infos, prepared by GRUB.
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- Switch into long mode.
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- Jump to Kaleid kernel.
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Our loader contains the multiboot header used by GRUB to check if the kernel
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can be started with the multiboot method. We use an ELF multiboot format, because
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it is more convenient.
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