diff --git a/rialto/src/error.rs b/rialto/src/error.rs
index 754e554..bf26639 100644
--- a/rialto/src/error.rs
+++ b/rialto/src/error.rs
@@ -16,7 +16,9 @@
 
 use aarch64_paging::MapError;
 use core::{fmt, result};
+use fdtpci::PciError;
 use hyp::Error as HypervisorError;
+use libfdt::FdtError;
 
 pub type Result<T> = result::Result<T, Error>;
 
@@ -28,16 +30,22 @@
     PageTableMapping(MapError),
     /// Failed to initialize the logger.
     LoggerInit,
+    /// Invalid FDT.
+    InvalidFdt(FdtError),
+    /// Invalid PCI.
+    InvalidPci(PciError),
 }
 
 impl fmt::Display for Error {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         match self {
-            Self::Hypervisor(e) => write!(f, "MMIO guard failed: {e}."),
+            Self::Hypervisor(e) => write!(f, "Hypervisor error: {e}."),
             Self::PageTableMapping(e) => {
                 write!(f, "Failed when attempting to map some range in the page table: {e}.")
             }
             Self::LoggerInit => write!(f, "Failed to initialize the logger."),
+            Self::InvalidFdt(e) => write!(f, "Invalid FDT: {e}"),
+            Self::InvalidPci(e) => write!(f, "Invalid PCI: {e}"),
         }
     }
 }
@@ -53,3 +61,15 @@
         Self::PageTableMapping(e)
     }
 }
+
+impl From<FdtError> for Error {
+    fn from(e: FdtError) -> Self {
+        Self::InvalidFdt(e)
+    }
+}
+
+impl From<PciError> for Error {
+    fn from(e: PciError) -> Self {
+        Self::InvalidPci(e)
+    }
+}
diff --git a/rialto/src/main.rs b/rialto/src/main.rs
index 0f92d3f..57bed69 100644
--- a/rialto/src/main.rs
+++ b/rialto/src/main.rs
@@ -28,7 +28,8 @@
     paging::{Attributes, MemoryRegion},
 };
 use buddy_system_allocator::LockedHeap;
-use core::ops::Range;
+use core::{ops::Range, slice};
+use fdtpci::PciInfo;
 use hyp::get_hypervisor;
 use log::{debug, error, info};
 use vmbase::{layout, main, power::reboot};
@@ -113,8 +114,17 @@
     vmbase::logger::init(log::LevelFilter::Debug).map_err(|_| Error::LoggerInit)
 }
 
-fn try_main() -> Result<()> {
+/// # Safety
+///
+/// Behavior is undefined if any of the following conditions are violated:
+/// * The `fdt_addr` must be a valid pointer and points to a valid `Fdt`.
+unsafe fn try_main(fdt_addr: usize) -> Result<()> {
     info!("Welcome to Rialto!");
+    // SAFETY: The caller ensures that `fdt_addr` is valid.
+    let fdt = unsafe { slice::from_raw_parts(fdt_addr as *mut u8, SZ_1M) };
+    let fdt = libfdt::Fdt::from_slice(fdt)?;
+    let pci_info = PciInfo::from_fdt(fdt)?;
+    debug!("PCI: {:#x?}", pci_info);
 
     let mut pgt = IdMap::new(PT_ASID, PT_ROOT_LEVEL);
     init_kernel_pgt(&mut pgt)?;
@@ -122,13 +132,15 @@
 }
 
 /// Entry point for Rialto.
-pub fn main(_a0: u64, _a1: u64, _a2: u64, _a3: u64) {
+pub fn main(fdt_addr: u64, _a1: u64, _a2: u64, _a3: u64) {
     init_heap();
     if try_init_logger().is_err() {
         // Don't log anything if the logger initialization fails.
         reboot();
     }
-    match try_main() {
+    // SAFETY: `fdt_addr` is supposed to be a valid pointer and points to
+    // a valid `Fdt`.
+    match unsafe { try_main(fdt_addr as usize) } {
         Ok(()) => info!("Rialto ends successfully."),
         Err(e) => {
             error!("Rialto failed with {e}");