Add Pci.Device class

src/hulk/hurl/a1.d

@@ -35,19 +35,30 @@ struct A1
 
         ulong address = Hurl.A1_BASE + allocated;
 
-        ulong mapped_limit = round_up_power_2(address, PAGE_SIZE);
+        ulong current_limit = round_up_power_2(address, PAGE_SIZE);
 
         allocated += size;
 
         ulong desired_limit = round_up_power_2(Hurl.A1_BASE + allocated, PAGE_SIZE);
 
-        while (desired_limit > mapped_limit)
+        while (desired_limit > current_limit)
         {
             void * page = Hippo.allocate_page();
-            Hurl.map(Hurl.A1_BASE + mapped_limit, page, PT_WRITABLE);
+            Hurl.map(current_limit, page, PT_WRITABLE);
-            mapped_limit += PAGE_SIZE;
+            current_limit += PAGE_SIZE;
         }
 
         return cast(void *)address;
     }
+
+    /**
+     * Allocate memory to store an instance of a given type.
+     *
+     * @return Address of allocated memory. This address will always be aligned
+     *   to a multiple of 16 bytes.
+     */
+    public static T * allocate(T)()
+    {
+        return cast(T *)allocate(T.sizeof);
+    }
 }

src/hulk/pci.d

@@ -2,6 +2,7 @@ module hulk.pci;
 
 import hulk.cpu;
 import hulk.klog;
+import hulk.hurl.a1;
 
 struct Pci
 {
@@ -23,6 +24,43 @@ struct Pci
         ubyte function_nr;
     }
 
+    struct Device
+    {
+        Address address;
+        ushort vendor_id;
+        ushort device_id;
+        ubyte class_id;
+        ubyte subclass_id;
+        ubyte if_id;
+
+        void initialize(Address address, ushort vendor_id, ushort device_id)
+        {
+            this.vendor_id = vendor_id;
+            this.device_id = device_id;
+            uint reg2 = read_config_register(address, 2u);
+            class_id = (reg2 >> 24u) & 0xFFu;
+            subclass_id = (reg2 >> 16u) & 0xFFu;
+            if_id = (reg2 >> 8u) & 0xFFu;
+            Klog.writefln("Found PCI device %04x:%04x (%02x:%02x:%02x) at %02u:%02u.%u",
+                    vendor_id, device_id,
+                    class_id, subclass_id, if_id,
+                    address.bus_nr, address.device_nr, address.function_nr);
+            init_device(class_id, subclass_id, if_id);
+            if (address.function_nr == 0u)
+            {
+                uint reg3 = read_config_register(address, 3u);
+                if ((reg3 & (1u << 23u)) != 0u)
+                {
+                    /* Multi-function device found. */
+                    for (address.function_nr = 1u; address.function_nr < 8u; address.function_nr++)
+                    {
+                        scan(address);
+                    }
+                }
+            }
+        }
+    }
+
     struct SerialBusController
     {
         enum ID = 0x0Cu;
@@ -91,29 +129,10 @@ struct Pci
         ulong reg0 = read_config_register(address, 0u);
         if (reg0 != 0xFFFFFFFFu)
         {
-            uint reg2 = read_config_register(address, 2u);
             ushort vendor_id = reg0 & 0xFFFFu;
             ushort device_id = (reg0 >> 16u) & 0xFFFFu;
-            ubyte class_id = (reg2 >> 24u) & 0xFFu;
+            Device * device = A1.allocate!Device();
-            ubyte subclass_id = (reg2 >> 16u) & 0xFFu;
+            device.initialize(address, vendor_id, device_id);
-            ubyte if_id = (reg2 >> 8u) & 0xFFu;
-            Klog.writefln("Found PCI device %04x:%04x (%02x:%02x:%02x) at %02u:%02u.%u",
-                    vendor_id, device_id,
-                    class_id, subclass_id, if_id,
-                    address.bus_nr, address.device_nr, address.function_nr);
-            init_device(class_id, subclass_id, if_id);
-            if (address.function_nr == 0u)
-            {
-                uint reg3 = read_config_register(address, 3u);
-                if ((reg3 & (1u << 23u)) != 0u)
-                {
-                    /* Multi-function device found. */
-                    for (address.function_nr = 1u; address.function_nr < 8u; address.function_nr++)
-                    {
-                        scan(address);
-                    }
-                }
-            }
         }
     }
 

src/hulk/util.d

@@ -11,7 +11,7 @@ module hulk.util;
  *
  * @return Rounded up value.
  */
-T round_up_power_2(T)(T v, T p)
+ulong round_up_power_2(ulong v, ulong p)
 {
     return (v + p - 1u) & ~(p - 1u);
 }