1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29

//! Memory management implementation
//! 
//! SV39 page-based virtual-memory architecture for RV64 systems, and
//! everything about memory management, like frame allocator, page table,
//! map area and memory set, is implemented here.
//! 
//! Every task or process has a memory_set to control its virtual memory.
mod address;
mod frame_allocator;
mod heap_allocator;
mod memory_set;
mod page_table;

use address::VPNRange;
pub use address::{PhysAddr, PhysPageNum, StepByOne, VirtAddr, VirtPageNum};
pub use frame_allocator::{frame_alloc, frame_dealloc, FrameTracker};
pub use memory_set::remap_test;
pub use memory_set::{kernel_token, MapPermission, MemorySet, KERNEL_SPACE};
use page_table::PTEFlags;
pub use page_table::{
    translated_byte_buffer, translated_ref, translated_refmut, translated_str, PageTable,
    PageTableEntry, UserBuffer, UserBufferIterator,
};
/// initiate heap allocator, frame allocator and kernel space
pub fn init() {
    heap_allocator::init_heap();
    frame_allocator::init_frame_allocator();
    KERNEL_SPACE.exclusive_access().activate();
}