Re-enable acpi feature and gate it for x86_64 only

Cargo.toml

@@ -42,7 +42,7 @@ raw-cpuid = "8.0.0"
 x86 = { version = "0.32.0", default-features = false }
 
 [features]
-default = ["serial_debug"]
+default = ["acpi", "multi_core", "serial_debug"]
 acpi = []
 doc = []
 graphical_debug = []

src/lib.rs

@@ -95,7 +95,7 @@ use crate::log::info;
 pub mod allocator;
 
 /// ACPI table parsing
-#[cfg(feature = "acpi")]
+#[cfg(all(feature = "acpi", target_arch = "x86_64"))]
 mod acpi;
 
 /// Context management

src/scheme/irq.rs

@@ -83,7 +83,7 @@ impl IrqScheme {
 
         *HANDLES.write() = Some(BTreeMap::new());
 
-        #[cfg(feature = "acpi")]
+        #[cfg(all(feature = "acpi", target_arch = "x86_64"))]
         let cpus = {
             use crate::acpi::madt::*;
 
@@ -94,7 +94,7 @@ impl IrqScheme {
                 _ => None,
             }).collect::<Vec<_>>()
         };
-        #[cfg(not(feature = "acpi"))]
+        #[cfg(not(all(feature = "acpi", target_arch = "x86_64")))]
         let cpus = vec!(0);
 
         IrqScheme {

src/scheme/mod.rs

@@ -19,7 +19,7 @@ use spin::{Once, RwLock, RwLockReadGuard, RwLockWriteGuard};
 use crate::syscall::error::*;
 use crate::syscall::scheme::Scheme;
 
-#[cfg(feature = "acpi")]
+#[cfg(all(feature = "acpi", target_arch = "x86_64"))]
 use self::acpi::AcpiScheme;
 
 use self::debug::DebugScheme;
@@ -36,7 +36,7 @@ use self::sys::SysScheme;
 use self::time::TimeScheme;
 
 /// When compiled with the "acpi" feature - `acpi:` - allows drivers to read a limited set of ACPI tables.
-#[cfg(feature = "acpi")]
+#[cfg(all(feature = "acpi", target_arch = "x86_64"))]
 pub mod acpi;
 
 /// `debug:` - provides access to serial console
@@ -161,7 +161,7 @@ impl SchemeList {
         let ns = self.new_ns();
 
         // These schemes should only be available on the root
-        #[cfg(feature = "acpi")] {
+        #[cfg(all(feature = "acpi", target_arch = "x86_64"))] {
             self.insert(ns, "acpi", |_| Arc::new(AcpiScheme::new())).unwrap();
         }
         self.insert(ns, "debug", |scheme_id| Arc::new(DebugScheme::new(scheme_id))).unwrap();