feat: devices via caps (BootInfo, init assigns devices, drivers map MMIO/DMA themselves, IRQ-driven input); drop boot device wiring and info pages; headless display fallback

crates/adapter-riscv/src/main.rs

@@ -107,6 +107,7 @@ boot_page_table:
 );
 
 const SHARED_BUF_VA: usize = 0x30000;
+const SHARED_BUF_PAGES: usize = 16;
 
 #[unsafe(no_mangle)]
 extern "C" fn kmain(hart: usize) -> ! {
@@ -127,20 +128,33 @@ extern "C" fn kmain(hart: usize) -> ! {
     let storage = boot::loader::load_server(&uart, &mut blk, b"storage.elf", "storage");
     let display = boot::loader::load_server(&uart, &mut blk, b"display.elf", "display");
     let input = boot::loader::load_server(&uart, &mut blk, b"input.elf", "input");
-    let virtio_base = blk.base();
 
     let board = board::devices().unwrap_or_else(|| halt(&uart, "bad board table"));
     kern_mut()
         .register_board(init.pid, &board)
         .unwrap_or_else(|_| halt(&uart, "board registration failed"));
-    devices::storage_setup::configure(&uart, init.pid, storage.pid, virtio_base);
-    devices::gpu_setup::configure(&uart, display.pid);
-    devices::input_setup::configure(&uart, input.pid);
+    devices::shared_buffer(
+        &uart,
+        init.pid,
+        storage.pid,
+        SHARED_BUF_VA,
+        SHARED_BUF_PAGES,
+    );
+    devices::display_quota(&uart, display.pid);
     boot::caps::grant_all(&uart, init.pid, storage.pid, display.pid, input.pid);
     // After grant_all, so the slots init already relies on stay put.
-    kern_mut()
-        .grant_boot_authority(init.pid, &board)
+    let mut placed = [None; board::BOARD_DEVICES];
+    let system_control = kern_mut()
+        .grant_boot_authority(init.pid, &board, &mut placed)
         .unwrap_or_else(|_| halt(&uart, "boot authority failed"));
+    devices::boot_info(
+        &uart,
+        init.pid,
+        &board,
+        &board::kinds(),
+        &placed,
+        system_control,
+    );
 
     start_other_harts(&uart, hart);
     uart.write_str("k-os: entering userspace\n");