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Update README.md.

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Yifan Wu 2022-01-13 17:38:25 -08:00
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@ -14,7 +14,7 @@ This project aims to show how to write an **Unix-like OS** running on **RISC-V**
* Platform supported: `qemu-system-riscv64` simulator or dev boards based on [Kendryte K210 SoC](https://canaan.io/product/kendryteai) such as [Maix Dock](https://www.seeedstudio.com/Sipeed-MAIX-Dock-p-4815.html)
* OS
* concurrency of multiple processes
* concurrency of multiple processes each of which contains mutiple native threads
* preemptive scheduling(Round-Robin algorithm)
* dynamic memory management in kernel
* virtual memory
@ -29,9 +29,15 @@ TODO:
## Working in progress
Now we are still updating our project, you can find latest changes on branches `chX-dev` such as `ch1-dev`. We are intended to publish first release 3.5.0 after completing most of the tasks mentioned below.
Our first release 3.5.0 (chapter 1-7) has been published.
Overall progress: ch7
There will be 9 chapters in our next release 3.6.0, where 2 new chapters will be added:
* chapter 8: synchronization on a uniprocessor
* chapter 9: I/O devices
Current version is 3.6.0-alpha.1 and we are still working on it.
Here are the updates since 3.5.0:
### Completed
@ -45,12 +51,15 @@ Overall progress: ch7
* [x] flush all block cache to disk after a fs transaction which involves write operation
* [x] replace `spin::Mutex` with `UPSafeCell` before SMP chapter
* [x] add codes for a new chapter about synchronization & mutual exclusion(uniprocessor only)
* [x] bug fix: we should call `find_pte` rather than `find_pte_create` in `PageTable::unmap`
* [x] clarify: "check validity of level-3 pte in `find_pte` instead of checking it outside this function" should not be a bug
* [x] code of chapter 8: synchronization on a uniprocessor
### Todo(High priority)
* [ ] support Allwinner's RISC-V D1 chip
* [ ] bug fix: we should call `find_pte` rather than `find_pte_create` in `PageTable::unmap`
* [ ] bug fix: check validity of level-3 pte in `find_pte` instead of checking it outside this function
* [ ] review documentation, current progress: 5/9
* [ ] switch the code of chapter 6 and chapter 7
* [ ] code of chapter 9: device drivers based on interrupts, including UART and block devices
* [ ] use old fs image optionally, do not always rebuild the image
* [ ] add new system calls: getdents64/fstat
* [ ] shell functionality improvement(to be continued...)
@ -62,6 +71,7 @@ Overall progress: ch7
* [ ] rewrite practice doc and remove some inproper questions
* [ ] provide smooth debug experience at a Rust source code level
* [ ] format the code using official tools
* [ ] support other platforms
### Crates