services: start implementing services

Signed-off-by: Sean Cross <sean@xobs.io>

src/xous/services.rs

@@ -0,0 +1,36 @@
+pub mod log;
+pub mod ticktimer;
+
+pub enum ScalarResult {
+    Scalar1(u32),
+    Scalar2([u32; 2]),
+    Scalar5([u32; 5]),
+}
+
+pub trait Service {
+    fn scalar(&mut self, sender: u32, opcode: u32, _args: [u32; 4]) {
+        panic!("Unknown scalar to service {}: {}", sender, opcode);
+    }
+    fn blocking_scalar(&mut self, sender: u32, opcode: u32, _args: [u32; 4]) -> ScalarResult {
+        panic!("Unknown scalar to service {}: {}", sender, opcode);
+    }
+    fn lend(&mut self, sender: u32, opcode: u32, _buf: &[u8], extra: [u32; 2]) -> [u32; 2] {
+        panic!("Unknown lend to service {}: {} ({:?})", sender, opcode, extra);
+    }
+    fn lend_mut(&mut self, sender: u32, opcode: u32, _buf: &mut [u8], extra: [u32; 2]) -> [u32; 2] {
+        panic!("Unknown lend_mut to service {}: {} ({:?})", sender, opcode, extra);
+    }
+    fn send(&mut self, sender: u32, opcode: u32, _buf: &[u8], extra: [u32; 2]) {
+        panic!("Unknown send to service {}: {} ({:?})", sender, opcode, extra);
+    }
+}
+
+pub fn get_service(name: &[u32; 4]) -> Option<Box<dyn Service + Sync + Send>> {
+    match name {
+        [0x6b636974, 0x656d6974, 0x65732d72, 0x72657672] => {
+            Some(Box::new(ticktimer::Ticktimer::new()))
+        }
+        [0x73756f78, 0x676f6c2d, 0x7265732d, 0x20726576] => Some(Box::new(log::Log::new())),
+        _ => None,
+    }
+}