Kernel: Don't compile ISA IDE controller code in non-x86 builds

The ISA IDE controller code makes sense to be compiled in a x86 build as
it relies on access to the x86 IO space. For other architectures, we can
just omit the code as there's no way we can use that code again.
To ensure we can omit the code easily, we move it to the Arch/x86
directory.

Kernel/Arch/x86/ISABus/IDEController.cpp

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <AK/OwnPtr.h>
+#include <AK/Types.h>
+#include <Kernel/Arch/x86/ISABus/IDEController.h>
+#include <Kernel/Bus/PCI/API.h>
+#include <Kernel/FileSystem/ProcFS.h>
+#include <Kernel/Library/LockRefPtr.h>
+#include <Kernel/Sections.h>
+#include <Kernel/Storage/ATA/ATADiskDevice.h>
+#include <Kernel/Storage/ATA/GenericIDE/Channel.h>
+
+namespace Kernel {
+
+UNMAP_AFTER_INIT NonnullLockRefPtr<ISAIDEController> ISAIDEController::initialize()
+{
+    return adopt_lock_ref(*new ISAIDEController());
+}
+
+UNMAP_AFTER_INIT ISAIDEController::ISAIDEController()
+{
+    initialize_channels();
+}
+
+UNMAP_AFTER_INIT void ISAIDEController::initialize_channels()
+{
+    auto primary_base_io = IOAddress(0x1F0);
+    auto primary_control_io = IOAddress(0x3F6);
+    auto secondary_base_io = IOAddress(0x170);
+    auto secondary_control_io = IOAddress(0x376);
+
+    auto initialize_and_enumerate = [](IDEChannel& channel) -> void {
+        {
+            auto result = channel.allocate_resources_for_isa_ide_controller({});
+            // FIXME: Propagate errors properly
+            VERIFY(!result.is_error());
+        }
+        {
+            auto result = channel.detect_connected_devices();
+            // FIXME: Propagate errors properly
+            VERIFY(!result.is_error());
+        }
+    };
+
+    m_channels.append(IDEChannel::create(*this, { primary_base_io, primary_control_io }, IDEChannel::ChannelType::Primary));
+    initialize_and_enumerate(m_channels[0]);
+    m_channels[0].enable_irq();
+
+    m_channels.append(IDEChannel::create(*this, { secondary_base_io, secondary_control_io }, IDEChannel::ChannelType::Secondary));
+    initialize_and_enumerate(m_channels[1]);
+    m_channels[1].enable_irq();
+    dbgln("ISA IDE controller detected and initialized");
+}
+
+}