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* mm: use linked-list-allocator as kmallocTianhao Wang2024-06-11
| | | | | | | | | | | | | | | | | | | | | | | | I'll implement my own allocator later. Currently using linked-list allocator [1] to manage the kernel heap (as in kmalloc, not vmalloc). It manages the ID-mapped region (from VA 0xffff_8000_0000_0000). This allocator is initialized to use the _largest_ physical memory block. If the kernel image (text and data) live in this zone then skip the occupied part. Key difference between kmalloc and vmalloc: - kmalloc pretty much manages the physical memory: the allocated address are within the id-mapped region (see above) therefore the allocated memory must also be contigous in physical memory. Such memory MUST NOT page fault. This is prone to fragmentation, so do not use kmalloc to allocate big objects (e.g. bigger than one 4k page). - vmalloc manages kernel heap memory and the mapping is managed by paging. Such memory could trigger pagefault in kernel mode. Note that the kmalloc conflicts with the previous used stack based PMA as they operates on the same VM zone. References: [1] https://github.com/rust-osdev/linked-list-allocator Signed-off-by: Tianhao Wang <shrik3@mailbox.org>
* chore: update readmeTianhao Wang2024-06-11
| | | | Signed-off-by: Tianhao Wang <shrik3@mailbox.org>
* readme: bulk updateTianhao Wang2024-06-11
| | | | | | | - update regarding contributing - fix typo - update roadmap - fix toc link
* readme: update regarding licenseTianhao Wang2024-06-11
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* fix readmeTianhao Wang2024-06-11
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* update readme for troubleshootingTianhao Wang2024-06-11
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* update readmeTianhao Wang2024-06-11
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* license: update readmeTianhao Wang2024-06-11
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* readme: add referenceTianhao Wang2024-06-11
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* readme: update infoTianhao Wang2024-06-11
| | | | Signed-off-by: Tianhao Wang <shrik3@mailbox.org>
* readme: update licensing noticeTianhao Wang2024-06-11
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* readme: update licensing noticeTianhao Wang2024-06-11
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* add tud referenceTianhao Wang2024-06-11
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* update readmeTianhao Wang2024-06-11
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* PS/2 Keyboard controller: baselineTianhao Wang2024-06-11
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* update readmeTianhao Wang2024-06-11
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* update readmeTianhao Wang2024-06-11
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* rename READMETianhao Wang2024-06-11