limine_protocol/requests/
hhdm.rs

1use core::ptr::NonNull;
2
3use crate::responses::HHDMResponse;
4
5limine_request! {
6    #[repr(C)]
7    #[derive(Debug)]
8    /// Request Higher Half Direct Mapping be enabled
9    pub struct HHDMRequest: [0x48dc_f1cb_8ad2_b852, 0x6398_4e95_9a98_244b] {
10        /// Response pointer
11        pub response: Option<NonNull<HHDMResponse>>,
12    }
13}
14
15impl HHDMRequest {
16    /// Get the response as a reference, if it's present.
17    ///
18    /// # Safety
19    /// The backing memory must not have been invalidated by the kernel,
20    /// either by writing to the physical memory, changing where it's mapped, or
21    /// unmapping it.
22    #[must_use]
23    pub unsafe fn get_response(&self) -> Option<&HHDMResponse> {
24        Some(self.response?.as_ref())
25    }
26}