1 files changed, 48 insertions, 0 deletions
diff --git a/Kernel/PCI.h b/Kernel/PCI.h
new file mode 100644
index 0000000000..7ffb23172f
--- /dev/null
+++ b/Kernel/PCI.h
@@ -0,0 +1,48 @@
+#pragma once
+
+#include <AK/Function.h>
+#include <AK/Types.h>
+
+namespace PCI {
+
+struct ID {
+    word vendor_id { 0 };
+    word device_id { 0 };
+
+    bool operator==(const ID& other) const
+    {
+        return vendor_id == other.vendor_id && device_id == other.device_id;
+    }
+};
+
+struct Address {
+    Address() { }
+    Address(byte bus, byte slot, byte function) : m_bus(bus), m_slot(slot), m_function(function) { }
+
+    bool is_null() const { return !m_bus && !m_slot && !m_function; }
+    operator bool() const { return !is_null(); }
+
+    byte bus() const { return m_bus; }
+    byte slot() const { return m_slot; }
+    byte function() const { return m_function; }
+
+    dword io_address_for_field(byte field) const
+    {
+        return 0x80000000u | (m_bus << 16u) | (m_slot << 11u) | (m_function << 8u) | (field & 0xfc);
+    }
+
+private:
+    byte m_bus { 0 };
+    byte m_slot { 0 };
+    byte m_function { 0 };
+};
+
+void enumerate_all(Function<void(Address, ID)>);
+dword get_BAR0(Address);
+dword get_BAR1(Address);
+dword get_BAR2(Address);
+dword get_BAR3(Address);
+dword get_BAR4(Address);
+dword get_BAR5(Address);
+
+}