Skeleton for architecture-specific things

kernel/src/arch/aarch64/mod.rs

@@ -0,0 +1 @@
+//! 

kernel/src/arch/mod.rs

@@ -0,0 +1,16 @@
+//! Architecture specific code
+
+macro_rules! arch_cond {
+    ($($arch:ident: $str:literal),* $(,)?) => {$(
+        #[cfg(target_arch = $str)]
+        pub mod $arch;
+        #[cfg(target_arch = $str)]
+        pub use $arch::*;
+    )*};
+}
+
+arch_cond!(
+    aarch64: "aarch64",
+    riscv64: "riscv64",
+    x86_64: "x86_64",
+);

kernel/src/arch/riscv64/mod.rs

@@ -0,0 +1 @@
+//! 

kernel/src/arch/x86_64/mod.rs

@@ -0,0 +1 @@
+//! 

kernel/src/lib.rs

@@ -7,6 +7,7 @@
 extern crate alloc;
 
 pub mod allocator;
+pub mod arch;
 pub mod task;
 
 use versioning::Version;