tg-kernel-vm

Kernel virtual memory management for the rCore tutorial operating system.

Overview

This crate provides virtual memory management utilities for RISC-V based kernel development. It offers abstractions for managing address spaces, page tables, and physical page allocation.

Features

• AddressSpace: High-level address space management
• PageManager trait: Abstract interface for physical page management
• Page table integration: Built on top of the page-table crate
• no_std compatible: Designed for bare-metal kernel environments

Usage

use tg_kernel_vm::{AddressSpace, PageManager, page_table};
use page_table::{Pte, VmFlags, VmMeta, PPN};

// Implement the PageManager trait for your memory allocator
struct MyPageManager { /* ... */ }

impl<Meta: VmMeta> PageManager<Meta> for MyPageManager {
    fn new_root() -> Self { /* ... */ }
    fn root_ptr(&self) -> NonNull<Pte<Meta>> { /* ... */ }
    // ... other methods
}

Core Abstractions

• PageManager<Meta> - Trait for physical page management including:
  • Root page table creation and access
  • Physical-to-virtual and virtual-to-physical address translation
  • Page allocation and deallocation
  • Ownership checking

Dependencies

• page-table - Page table manipulation primitives

License

Licensed under either of MIT license or Apache License, Version 2.0 at your option.