Add hwd

Cargo.toml

@@ -2,6 +2,7 @@
 members = [
     "acpid",
     "common",
+    "hwd",
     "pcid",
     "ps2d",
     "vboxd",

hwd/.gitignore

@@ -0,0 +1 @@
+/target

hwd/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "hwd"
+version = "0.1.0"
+edition = "2018"
+
+[dependencies]
+log = "0.4"
+ron = "0.8.1"
+
+amlserde = { path = "../amlserde" }
+common = { path = "../common" }

hwd/src/main.rs

@@ -0,0 +1,47 @@
+use amlserde::{AmlSerde, AmlSerdeValue};
+use std::{error::Error, fs};
+
+fn acpi() -> Result<(), Box<dyn Error>> {
+    for entry_res in fs::read_dir("/scheme/acpi/symbols")? {
+        let entry = entry_res?;
+        if let Some(file_name) = entry.file_name().to_str() {
+            if file_name.ends_with("_CID") || file_name.ends_with("_HID") {
+                let ron = fs::read_to_string(entry.path())?;
+                let AmlSerde { name, value } = ron::from_str(&ron)?;
+                let id = match value {
+                    AmlSerdeValue::Integer(integer) => {
+                        let vendor = integer & 0xFFFF;
+                        let device = (integer >> 16) & 0xFFFF;
+                        let vendor_rev = ((vendor & 0xFF) << 8) | vendor >> 8;
+                        let vendor_1 = (((vendor_rev >> 10) & 0x1f) as u8 + 64) as char;
+                        let vendor_2 = (((vendor_rev >> 5) & 0x1f) as u8 + 64) as char;
+                        let vendor_3 = (((vendor_rev >> 0) & 0x1f) as u8 + 64) as char;
+                        format!("{}{}{}{:04X}", vendor_1, vendor_2, vendor_3, device)
+                    }
+                    AmlSerdeValue::String(string) => {
+                        string
+                    },
+                    _ => {
+                        log::warn!("{}: unsupported value {:x?}", name, value);
+                        continue;
+                    }
+                };
+                log::debug!("{}: {}", name, id);
+            }
+        }
+    }
+    Ok(())
+}
+
+fn main() {
+    common::setup_logging(
+        "misc",
+        "hwd",
+        "hwd",
+        log::LevelFilter::Info,
+        log::LevelFilter::Info,
+    );
+
+    //TODO: HWD is meant to locate PCI/XHCI/etc devices in ACPI and DeviceTree definitions and start their drivers
+    acpi().unwrap();
+}