feat(display): input routed via display server to focused app; input Subscribe; uses caps badged + Delegate

crates/init/src/manifest.rs

@@ -16,7 +16,8 @@ pub struct Program {
     /// Serves an endpoint, which it finds in slot 0.
     pub serves: bool,
     pub device: Option<Device>,
-    /// Earlier programs' endpoints it may call, in its next slots.
+    /// Earlier programs' endpoints it may call, in its next slots; each
+    /// program's copy carries its own badge, so a server can tell them apart.
     pub uses: &'static [&'static str],
     /// Takes the console over from init; everyone else prints through it.
     pub console: bool,
@@ -51,12 +52,14 @@ const fn server(name: &'static str, file: &'static [u8], limits: Limits) -> Prog
 /// Started on every boot. The log server comes first so the rest can print.
 pub const SERVERS: &[Program] = &[
     Program { console: true, ..server("log", b"log.elf", SMALL) },
+    Program { device: Some(Device::Input), ..server("input", b"input.elf", Limits { regions: 4, ..SMALL }) },
+    // The input server's only client: it passes input on to the app in focus.
     Program {
         device: Some(Device::Gpu),
+        uses: &["input"],
         // The framebuffer alone is ~1000 pages at 1280x800.
         ..server("display", b"display.elf", Limits { pages: 1280, regions: 4, ..SMALL })
     },
-    Program { device: Some(Device::Input), ..server("input", b"input.elf", Limits { regions: 4, ..SMALL }) },
     server("permis", b"permis.elf", SMALL),
     server("session", b"session.elf", SMALL),
 ];
@@ -73,6 +76,6 @@ pub const TESTS: &[Program] = &[Program {
 /// The desktop; the test image runs the SMP self-test instead.
 pub const APPS: &[Program] = &[Program {
     serves: false,
-    uses: &["input", "display"],
+    uses: &["display"],
     ..server("snake", b"snake.elf", Limits { pages: 128, ..SMALL })
 }];