parse XSDT and MADT

kernel/src/acpi.rs

@@ -16,9 +16,9 @@ pub struct RSDP {
     reserved: [u8; 3],
 }
 
-#[derive(Debug)]
+#[derive(Debug, Copy, Clone)]
 #[repr(packed)]
-pub struct XSDT {
+pub struct ACPI_table_header {
     signature: [u8; 4],
     length: u32,
     revision: u8,
@@ -28,17 +28,40 @@ pub struct XSDT {
     OEMRevision: u32,
     creator_id: u32,
     creator_revison: u32,
-    pointers: [* const (); 16], // TODO
+}
+
+#[derive(Debug)]
+#[repr(packed)]
+pub struct XSDT {
+    header: ACPI_table_header,
+    pointers: [u64; 16], // TODO
+}
+
+#[derive(Debug)]
+#[repr(packed)]
+pub struct MADT {
+    header: ACPI_table_header,
+    local_apic_addr: u32,
+    flags: u32,
+    record_marker: (),
 }
 
 pub static mut rsdp: * const RSDP = 0 as * const RSDP;
 pub static mut xsdt: * const XSDT = 0 as * const XSDT;
+pub static mut madt: * const MADT = 0 as * const MADT;
 
 pub fn init(res: &RsdpResponse) {
     unsafe {
         rsdp = res.address() as * const RSDP;
         println!("{:?}", *rsdp);
         xsdt = phys_to_virt((*rsdp).xsdt_addr) as * const XSDT;
         println!("{:?}", *xsdt);
+        for i in 0..16 {
+            let head = phys_to_virt((*xsdt).pointers[i]) as * const ACPI_table_header;
+            if (*head).signature == [65, 80, 73, 67] {
+                madt = head as * const MADT;
+                println!("{:#?}", *madt);
+            }
+        }
     }
 }