Refactor and reorganize project structure

src/aarch64/mmu.rs

@@ -0,0 +1,17 @@
+use core::arch::asm;
+
+pub fn init_mmu() {
+    let ips = 0b000 << 32;
+
+    // 4KB granularity
+    let tg0 = 0b00 << 14;
+    let tg1 = 0b00 << 30;
+
+    //64-25 = 29 bits of VA
+    // FFFF_FF80_0000_0000 start address
+    let t0sz = 25;
+
+    let tcr_el1: u64 = ips | tg0 | tg1 | t0sz;
+
+    unsafe { asm!("msr TCR_EL1, {0:x}", in(reg) tcr_el1) };
+}