refactor: remove arch-specific get_fdt

src/arch/x86_64/kernel/mod.rs

@@ -4,7 +4,6 @@ use core::num::NonZeroU64;
 use core::ptr;
 use core::sync::atomic::{AtomicPtr, AtomicU32, Ordering};
 
-use fdt::Fdt;
 use hermit_entry::boot_info::{PlatformInfo, RawBootInfo};
 use hermit_sync::InterruptSpinMutex;
 use x86::controlregs::{cr0, cr0_write, cr4, Cr0};
@@ -68,13 +67,6 @@ pub fn get_mbinfo() -> Option<NonZeroU64> {
 	}
 }
 
-pub fn get_fdt() -> Option<Fdt<'static>> {
-	env::boot_info().hardware_info.device_tree.map(|fdt| {
-		let ptr = ptr::with_exposed_provenance(fdt.get().try_into().unwrap());
-		unsafe { Fdt::from_ptr(ptr).unwrap() }
-	})
-}
-
 #[cfg(feature = "smp")]
 pub fn get_possible_cpus() -> u32 {
 	use core::cmp;

src/arch/x86_64/mm/physicalmem.rs

@@ -4,7 +4,7 @@ use free_list::{AllocError, FreeList, PageLayout, PageRange};
 use hermit_sync::InterruptTicketMutex;
 use multiboot::information::{MemoryType, Multiboot};
 
-use crate::arch::x86_64::kernel::{get_fdt, get_limit, get_mbinfo};
+use crate::arch::x86_64::kernel::{get_limit, get_mbinfo};
 use crate::arch::x86_64::mm::paging::{BasePageSize, PageSize};
 use crate::arch::x86_64::mm::{MultibootMemory, PhysAddr, VirtAddr};
 use crate::{env, mm};
@@ -18,7 +18,7 @@ const KVM_32BIT_GAP_SIZE: usize = 768 << 20;
 const KVM_32BIT_GAP_START: usize = KVM_32BIT_MAX_MEM_SIZE - KVM_32BIT_GAP_SIZE;
 
 fn detect_from_fdt() -> Result<(), ()> {
-	let fdt = get_fdt().ok_or(())?;
+	let fdt = env::fdt().ok_or(())?;
 
 	let mems = fdt.find_all_nodes("/memory");
 	let all_regions = mems.map(|m| m.reg().unwrap().next().unwrap());

src/lib.rs

@@ -196,8 +196,7 @@ fn boot_processor_main() -> ! {
 	info!("Welcome to Hermit {}", env!("CARGO_PKG_VERSION"));
 	info!("Kernel starts at {:p}", env::get_base_address());
 
-	#[cfg(target_arch = "x86_64")]
-	if let Some(fdt) = kernel::get_fdt() {
+	if let Some(fdt) = env::fdt() {
 		info!("FDT:\n{fdt:#?}");
 	}