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* proc: interrupt: define context and trap frameTianhao Wang2024-06-11
| | | | Signed-off-by: Tianhao Wang <shrik3@mailbox.org>
* toolchain: replace xbuild with build-stdTianhao Wang2024-06-11
| | | | | | | | | | | for a no_std build with custom target, we need to build the rust compoments including core, alloc and compiler builtins. Previously we do this with the cargo xbuild tool. however it has some bugs with newer toolchains. The official build-std feature is not stable but looks promising! Also we could reduce a lot of build dependencies. References: https://github.com/rust-in-action/code/issues/14 Signed-off-by: Tianhao Wang <shrik3@mailbox.org>
* docs: add notes on calling convTianhao Wang2024-06-11
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* mm: use id mapped vaddr of free_page_stackTianhao Wang2024-06-11
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* build: include Cargo.lock in vcsTianhao Wang2024-06-11
| | | | Signed-off-by: Tianhao Wang <shrik3@mailbox.org>
* pic: replace hardcoded values, add docsTianhao Wang2024-06-11
| | | | Signed-off-by: Tianhao Wang <shrik3@mailbox.org>
* docs: add notes on interrupt (vectors) and PICTianhao Wang2024-06-11
| | | | Signed-off-by: Tianhao Wang <shrik3@mailbox.org>
* toolchain: bump rust toolchain versionTianhao Wang2024-06-11
| | | | | | | | | | | | | | | | | | | 1. allow unexpected cfgs in lib.rs, in this case "no_global_oom_handling" is cause warnings [1] 2. for large code models the compiler (rust linkers) now put code and data in `.ltext`, `.ldata`, `.lbss`, `.lrodata` instead of the same `.text` , `.data` ... etc. We are adjusting accordingly in the linker script. 3. unsafe assertions identified undefined behaviours, in this case a repr(C) struct was not mared as repr(packed), therefore having an unexpected size. The unsafe assertions was not enabled by default in debug builds so the idt setup code with from_raw_parts_mut() has been working on UB. Glad we can catch this.... related: [1] https://github.com/rust-lang/rust/pull/123501 related: [2] https://blog.rust-lang.org/2024/05/02/Rust-1.78.0.html#asserting-unsafe-preconditions
* idt: mm: move idt and vectors also to upper memoryTianhao Wang2024-06-11
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* chore: add v2p and p2v conversion wrt. id mappingTianhao Wang2024-06-11
| | | | Also renamed a few symbols to avoid confusion.
* fix kernel mapping start addressTianhao Wang2024-06-11
| | | | | should be 0xffff_8020_0000_0000, but I used the id mapping by mistake (0xffff_8000_0000_0000)
* chore: cleanupTianhao Wang2024-06-11
| | | | Signed-off-by: Tianhao Wang <shrik3@mailbox.org>
* chore: remove unused depsTianhao Wang2024-06-11
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* debug: add basic setup for qemu/gdbTianhao Wang2024-06-11
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* mm: fully map the kernel to high memoryTianhao Wang2024-06-11
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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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