Init PCI compoment

Cargo.lock

@@ -251,6 +251,16 @@ dependencies = [
  "xmas-elf",
 ]
 
+[[package]]
+name = "aster-pci"
+version = "0.1.0"
+dependencies = [
+ "component",
+ "log",
+ "ostd",
+ "spin",
+]
+
 [[package]]
 name = "aster-rights"
 version = "0.1.0"

Cargo.toml

@@ -25,6 +25,7 @@ members = [
     "kernel/comps/mlsdisk",
     "kernel/comps/time",
     "kernel/comps/virtio",
+    "kernel/comps/pci",
     "kernel/libs/cpio-decoder",
     "kernel/libs/int-to-c-enum",
     "kernel/libs/int-to-c-enum/derive",

Components.toml

@@ -13,6 +13,7 @@ network = { name = "aster-network" }
 mlsdisk = { name = "aster-mlsdisk" }
 systree = { name = "aster-systree" }
 keyboard = { name = "aster-keyboard" }
+pci = { name = "aster-pci" }
 
 [whitelist]
 [whitelist.nix.main]

Makefile

@@ -207,6 +207,7 @@ OSDK_CRATES := \
 	kernel/comps/mlsdisk \
 	kernel/comps/time \
 	kernel/comps/virtio \
+	kernel/comps/pci \
 	kernel/libs/aster-util \
 	kernel/libs/aster-bigtcp \
 	kernel/libs/xarray

kernel/comps/pci/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "aster-pci"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+ostd = { path = "../../../ostd" }
+component = { path = "../../libs/comp-sys/component" }
+log = "0.4"
+spin = "0.9.4"
+
+[lints]
+workspace = true

kernel/comps/pci/src/lib.rs

@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: MPL-2.0
+
+//! PCI bus in Asterinas
+#![no_std]
+#![deny(unsafe_code)]
+
+use component::{init_component, ComponentInitError};
+
+#[init_component]
+fn pci_init() -> Result<(), ComponentInitError> {
+    init();
+    Ok(())
+}