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* mm: provide high memory kernel mapping in asm code.Tianhao Wang2024-06-11
| | | | | | | | | | | | | | | | | we use the first pml4 entry (+one pdp table) to map phy 0~512G to virt 0~512G for init code. This doesn't change. For the kernel to work in higher half memory, we also need to create mapping for it. We take the 256th entry of pml4 entry (hence one additional pdp table). Entry 0~63 are mapped to to the physical memory (with offset 0xffff_8000_0000_0000) Entry 64~127 are not used Entry 128~191 are mapped to the kernel image (text and code) (with offset 0xffff_8020_0000_0000) details in docs/mem_layout.txt
* docs: memory layoutTianhao Wang2024-06-11
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* chore: cleanup startup codeTianhao Wang2024-06-11
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* mm: add basic paging infra from x86_64 crateTianhao Wang2024-06-11
| | | | | | | | | | the x86_64 crate is pretty solid and has a permissive license (Apache/MIT), but I want to make this myself in the future to "experience" the unsafe rust further....Also it has too many abstractions, which is justified as a library, but not ideal for a from sctrach toy OS as it hides the lower end. Signed-off-by: Tianhao Wang <shrik3@mailbox.org>
* mm: fix Range type and addr roundingTianhao Wang2024-06-11
| | | | Signed-off-by: Tianhao Wang <shrik3@mailbox.org>
* mm: explicitly clear unused entries in init tableTianhao Wang2024-06-11
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* mm: add stack based PMATianhao Wang2024-06-11
| | | | | | | use 8MiB reserved array to manage up to 4GiB of physical memory (4K Pages only) Signed-off-by: Tianhao Wang <shrik3@mailbox.org>
* makefile: default to cargo debug buildTianhao Wang2024-06-11
| | | | | | | we should define debug and release targets, but hardcoding in makefile for now. Signed-off-by: Tianhao Wang <shrik3@mailbox.org>
* multiboot: docs and cleanupTianhao Wang2024-06-11
| | | | Signed-off-by: Tianhao Wang <shrik3@mailbox.org>
* multiboot: parse mmap blocksTianhao Wang2024-06-11
| | | | Signed-off-by: Tianhao Wang <shrik3@mailbox.org>
* multiboot: get memory info from MB infoTianhao Wang2024-06-11
| | | | Signed-off-by: Tianhao Wang <shrik3@mailbox.org>
* multiboot: basic support for multiboot infoTianhao Wang2024-06-11
| | | | | | | | well, it's not trivial to use bios function because thanks to grub + multiboot, we are already in protected mode when the startup code takes control. Also the MB info is easier to play with than BIOS (or ACPI) Signed-off-by: Tianhao Wang <shrik3@mailbox.org>
* keyboard: pad key translation tableTianhao Wang2024-06-11
| | | | | | | | some keys such as the Win key has larger scancode, causing out-of-bound read in the translation table. As a temp fix pad the tables with 0 up to 100 chars. Signed-off-by: Tianhao Wang <shrik3@mailbox.org>
* update attributionsTianhao Wang2024-06-11
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* fix io blocking bug in kbdctlTianhao Wang2024-06-11
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* choreTianhao Wang2024-06-11
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* doc: notes on x86 gdt and segmentationTianhao Wang2024-06-11
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* cgascr: refactoringTianhao Wang2024-06-11
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* readme: bulk updateTianhao Wang2024-06-11
| | | | | | | - update regarding contributing - fix typo - update roadmap - fix toc link
* refine ATTRIBUTIONS and LICENSE textTianhao Wang2024-06-11
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* add contributing guidelinesTianhao Wang2024-06-11
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* 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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* move io.rs into submoduleTianhao 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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* license: use EUPLTianhao Wang2024-06-11
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* makefile: mute ld RWX warningTianhao Wang2024-06-11
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* choreTianhao Wang2024-06-11
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* rename wraper -> vectorTianhao Wang2024-06-11
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* startup: define multiboot headers in linker scriptTianhao Wang2024-06-11
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* nasm: ignore zeroing warningTianhao Wang2024-06-11
| | | | | | When using `resb` outside of a BSS section, nasm will yell at you. But we know what we are doing! We never expect zero-init for such reserved spaces!
* startup: flatten control flowTianhao Wang2024-06-11
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* choreTianhao Wang2024-06-11
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* linker: "optimize" section arrangementsTianhao Wang2024-06-11
| | | | | | | 1. throw vectors in a custom ".reserved" section 2. throw idt in a NOLOAD ".reserved_0" section: save some binary size (like .bss) since we don't care for its initial value. 3. squash all ".data.*" sections from rust into ".data"
* interrupt: add rust binding for idtTianhao Wang2024-06-11
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* check formatting in make scriptTianhao Wang2024-06-11
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* formatting codeTianhao Wang2024-06-11
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* misc: add full rustfmt configTianhao Wang2024-06-11
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* split idt and vectors from startup codeTianhao Wang2024-06-11
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* choreTianhao Wang2024-06-11
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* linker: explicitly provide ___BSS* symbolsTianhao Wang2024-06-11
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* interrupt: rename `guardian` to `interrupt_gate`Tianhao Wang2024-06-11
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* mask keyboard interrupt while polling keyTianhao Wang2024-06-11
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* mask interrupt during handler routineTianhao Wang2024-06-11
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* remove plugbox moduleTianhao Wang2024-06-11
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* pic: initialize with rust codeTianhao Wang2024-06-11
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* add ATTRIBUTIONSTianhao Wang2024-06-11
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* chore lintingTianhao Wang2024-06-11
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