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2 changed files with 6 additions and 32 deletions

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@ -78,7 +78,8 @@ qemu: kern/kernel.elf
@$(QEMU) -machine virt -bios none -nographic -m 128M -smp 4 -kernel $<
clean:
find . -type f -name '*.[od(elf)]' -exec rm -f {} +
rm -f *.o *.elf *.d lib/*.o lib/*.d
find . -type f -name '*.[od]' -exec rm -f {} +
format:
find . -type f -name '*.[ch]' -exec clang-format -i {} +

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@ -7,34 +7,7 @@ For a quick reference on RISC-V assembly:
Some low-level string format routines borrowed from [mini-printf](https://github.com/mludvig/mini-printf)
### Directory outline
The planned directory outline is as follows:
```
root
├── kern # General kernel sources
│ ├── libkern # Kernel specific library routines
│ ├── memory # Memory related code (kalloc, buddy and friends)
│ └── arch # Architecture specific functionality
├── libc # Userspace C library
└── user # Userspace programs
```
### Quick Start
```sh
make get_toolchain # Dont worry, is will land locally inside project directory
make -j$(nproc)
make qemu
```
The project can be cleaned with:
```sh
make clean # Wipes .o, .d, .elf
make distclean # Wipes the above, but also removes toolchain
```
### Toolchains:
Toolchains:
- https://github.com/xpack-dev-tools/riscv-none-elf-gcc-xpack
- https://github.com/xpack-dev-tools/qemu-riscv-xpack/
@ -44,8 +17,6 @@ make distclean # Wipes the above, but also removes toolchain
> term trap, largely because it was the term used by the PDP11/40 and therefore is the
> conventional Unix term.
### Notes/Misc
| Register | Name | Privilege Level | Description |
|-------------|----------------------------|------------------|-----------------------------------------------------------------------------|
| `mstatus` | Machine Status Register | Machine | Holds global interrupt enable, previous privilege mode, etc. |
@ -64,7 +35,9 @@ make distclean # Wipes the above, but also removes toolchain
| `mip` | Machine Interrupt Pending | Machine | Indicates pending interrupts. |
| `mie` | Machine Interrupt Enable | Machine | Controls which interrupts are enabled. |
### Libc Implementations
# Notes
## Libc Implementations
[uClibc](https://uclibc.org/)
[musl libc](https://musl.libc.org/)