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Implement Heap allocation (#3)

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* Implement Maloc

* Implement Dealloc

* Migrate to a struct based heap implementation
This commit is contained in:
Alexander Neuhäuser
2025-09-14 18:17:24 +02:00
committed by GitHub
parent 981a6cd65c
commit afe1128139
9 changed files with 265 additions and 71 deletions
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24
src/framebuffer.rs
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@@ -9,7 +9,6 @@ use crate::mailbox::{read_mailbox, write_mailbox};
struct Mailbox([u32; 36]);
const ALLOCATE_BUFFER: u32 = 0x0004_0001;
const GET_PHYSICAL_DISPLAY_WH: u32 = 0x0004_0003;
const SET_PHYSICAL_DISPLAY_WH: u32 = 0x0004_8003;
const SET_VIRTUAL_DISPLAY_WH: u32 = 0x0004_8004;
const SET_PIXEL_DEPTH: u32 = 0x0004_8005;
@@ -242,26 +241,3 @@ impl FrameBuffer {
}
}
}
pub fn print_display_resolution() {
let mut mailbox: [u32; 8] = [0; 8];
mailbox[0] = 8 * 4;
mailbox[1] = 0;
mailbox[2] = GET_PHYSICAL_DISPLAY_WH;
mailbox[3] = 8;
mailbox[4] = 0;
mailbox[5] = 0;
mailbox[6] = 0;
mailbox[7] = 0;
let addr = core::ptr::addr_of!(mailbox[0]) as u32;
write_mailbox(8, addr);
let _ = read_mailbox(8);
if mailbox[1] == 0 {
println!("Failed");
}
println!("Width x Height: {}x{}", mailbox[5], mailbox[6]);
}