obkrnl/vm/
x86_64.rs

1use super::VmPage;
2use crate::config::PAGE_SIZE;
3use core::arch::asm;
4use krt::{phys_vaddr, phys_vsize};
5
6/// See `pmap_kextract` on the Orbis for a reference.
7///
8/// # Reference offsets
9/// | Version | Offset |
10/// |---------|--------|
11/// |PS4 11.00|0x1145F0|
12pub unsafe fn kaddr_to_phys(va: usize) -> usize {
13    let dmap = phys_vaddr();
14    let dend = dmap + phys_vsize().get();
15
16    if va >= dmap && va < dend {
17        va - dmap
18    } else {
19        todo!()
20    }
21}
22
23impl VmPage {
24    /// See `pagezero` on the Orbis for a reference.
25    ///
26    /// # Safety
27    /// The caller must have exclusive access to this page and no any references to the data within
28    /// this page.
29    ///
30    /// # Reference offsets
31    /// | Version | Offset |
32    /// |---------|--------|
33    /// |PS4 11.00|0x2DDD70|
34    pub unsafe fn fill_with_zeros(&self) {
35        // The Orbis also check if the address within the stack but I don't think we need that.
36        let addr = phys_vaddr() + self.addr;
37
38        unsafe {
39            asm!(
40            "sub {addr}, {i}",
41            "xor eax, eax",
42            "2:",
43            "movnti [{addr} + {i}], rax",
44            "movnti [{addr} + {i} + 0x08], rax",
45            "movnti [{addr} + {i} + 0x10], rax",
46            "movnti [{addr} + {i} + 0x18], rax",
47            "add {i}, 0x20",
48            "jnz 2b",
49            "sfence",
50            addr = inout(reg) addr => _,
51            i = inout(reg) { -(PAGE_SIZE.get() as isize) } => _,
52            out("rax") _)
53        };
54    }
55}
obkrnl/vm/x86_64.rs

obkrnl/vm/
x86_64.rs
