Use pl011-uart crate for aarch64 example.

examples/aarch64/Cargo.toml

@@ -8,6 +8,7 @@ edition = "2021"
 buddy_system_allocator = "0.10.0"
 flat_device_tree = "3.1.1"
 log = "0.4.22"
+pl011-uart = "0.1.0"
 smccc = "0.1.1"
 spin = "0.9.8"
 virtio-drivers = { path = "../.." }

examples/aarch64/src/main.rs

@@ -7,9 +7,7 @@ mod exceptions;
 mod hal;
 mod logger;
 #[cfg(platform = "qemu")]
-mod pl011;
-#[cfg(platform = "qemu")]
-use pl011 as uart;
+use pl011_uart as uart;
 #[cfg(platform = "crosvm")]
 mod uart8250;
 #[cfg(platform = "crosvm")]
@@ -50,11 +48,11 @@ use virtio_drivers::{
 
 /// Base memory-mapped address of the primary PL011 UART device.
 #[cfg(platform = "qemu")]
-pub const UART_BASE_ADDRESS: usize = 0x900_0000;
+pub const UART_BASE_ADDRESS: *mut u32 = 0x900_0000 as _;
 
 /// The base address of the first 8250 UART.
 #[cfg(platform = "crosvm")]
-pub const UART_BASE_ADDRESS: usize = 0x3f8;
+pub const UART_BASE_ADDRESS: *mut u32 = 0x3f8 as _;
 
 #[global_allocator]
 static HEAP_ALLOCATOR: LockedHeap<32> = LockedHeap::new();

examples/aarch64/src/uart8250.rs

@@ -18,9 +18,9 @@ impl Uart {
     /// The given base address must point to the 8 MMIO control registers of an appropriate UART
     /// device, which must be mapped into the address space of the process as device memory and not
     /// have any other aliases.
-    pub unsafe fn new(base_address: usize) -> Self {
+    pub unsafe fn new(base_address: *mut u32) -> Self {
         Self {
-            base_address: base_address as *mut u8,
+            base_address: base_address.cast(),
         }
     }