feat(adapter-riscv): add RiscVPlatform, PLIC driver, and kernel boot on QEMU

crates/adapter-riscv/src/main.rs

@@ -2,6 +2,8 @@
 #![no_main]
 
 mod page_table;
+mod platform;
+mod plic;
 mod timer;
 mod trap;
 mod uart;
@@ -52,8 +54,28 @@ extern "C" fn kmain() -> ! {
 
     trap::init_trap();
     timer::init_timer();
+    plic::Plic::init();
     uart.write_str("k-os: traps and timer initialized\n");
 
+    let riscv_platform = platform::RiscVPlatform::new();
+    let pool = domain::memory::page_pool::PagePool::new(
+        types::address::PhysicalAddress::from_raw(0x84000000),
+        256,
+    );
+    let mut kern = kernel::Kernel::new(riscv_platform, pool);
+    let (pid, tid) = kern
+        .boot(
+            types::bounded::Priority::new(16).unwrap_or_else(|| unreachable!()),
+            types::time::TimeSlice::new(100),
+        )
+        .unwrap_or_else(|_| loop { unsafe { core::arch::asm!("wfi") }; });
+
+    uart.write_str("k-os: kernel started (pid=");
+    uart.write_dec(pid.raw() as usize);
+    uart.write_str(", tid=");
+    uart.write_dec(tid.raw() as usize);
+    uart.write_str(")\n");
+
     loop {
         unsafe { core::arch::asm!("wfi") };
     }