Bryan McShea
35 lines
902 B
Rust
35 lines
902 B
Rust
// stolen from https://osblog.stephenmarz.com/index.html chapter 3 which I'm prolly gonna start
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// following for now bc don't wanna learn x86_64 :)
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use crate::{
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arch::csr::{self, satp}, fdt::print_fdt, println
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};
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use super::asm::linker_static;
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linker_static!(HEAP_START: usize, ".dword _heap_start");
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static HEAP_SIZE: usize = 128 * 1024 * 1024;
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pub struct Entry(u64);
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pub struct Table {
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pub entries: [Entry; 2usize.pow(9)],
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}
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pub fn init(fdt: usize) {
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unsafe {
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println!("heap start: 0x{:x}", HEAP_START);
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print_fdt(fdt);
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let table_start = HEAP_START as *mut Table;
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csr::satp::write(satp::Satp {
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mode: satp::Mode::Sv39,
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asid: 0,
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ppn: table_start,
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});
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let satp = csr::satp::read();
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println!("satp: {satp:?}");
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let x = *(0x9000_0000 as *mut u8);
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println!("we got {x}");
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}
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}
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