Kernel: Change HandlerPurpose to HandlerType

Also, GenericInterruptHandler class requires to implement two new
methods.

Kernel/ACPI/ACPIDynamicParser.h

@@ -47,6 +47,7 @@ namespace ACPI {
         virtual void disable_aml_interpretation() override;
         virtual void try_acpi_shutdown() override;
         virtual bool can_shutdown() override { return true; }
+        virtual const char* purpose() const override { return "ACPI Parser"; }
 
     protected:
         DynamicParser();

Kernel/Arch/i386/CPU.cpp

@@ -410,17 +410,17 @@ static void revert_to_unused_handler(u8 interrupt_number)
 void register_generic_interrupt_handler(u8 interrupt_number, GenericInterruptHandler& handler)
 {
     if (s_interrupt_handler[interrupt_number] != nullptr) {
-        if (s_interrupt_handler[interrupt_number]->purpose() == HandlerPurpose::UnhandledInterruptHandler) {
+        if (s_interrupt_handler[interrupt_number]->type() == HandlerType::UnhandledInterruptHandler) {
             s_interrupt_handler[interrupt_number] = &handler;
             return;
         }
         if (s_interrupt_handler[interrupt_number]->is_shared_handler() && !s_interrupt_handler[interrupt_number]->is_sharing_with_others()) {
-            ASSERT(s_interrupt_handler[interrupt_number]->purpose() == HandlerPurpose::SharedIRQHandler);
+            ASSERT(s_interrupt_handler[interrupt_number]->type() == HandlerType::SharedIRQHandler);
             static_cast<SharedIRQHandler*>(s_interrupt_handler[interrupt_number])->register_handler(handler);
             return;
         }
         if (!s_interrupt_handler[interrupt_number]->is_shared_handler()) {
-            ASSERT(s_interrupt_handler[interrupt_number]->purpose() == HandlerPurpose::IRQHandler);
+            ASSERT(s_interrupt_handler[interrupt_number]->type() == HandlerType::IRQHandler);
             auto& previous_handler = *s_interrupt_handler[interrupt_number];
             s_interrupt_handler[interrupt_number] = nullptr;
             SharedIRQHandler::initialize(interrupt_number);
@@ -437,12 +437,12 @@ void register_generic_interrupt_handler(u8 interrupt_number, GenericInterruptHan
 void unregister_generic_interrupt_handler(u8 interrupt_number, GenericInterruptHandler& handler)
 {
     ASSERT(s_interrupt_handler[interrupt_number] != nullptr);
-    if (s_interrupt_handler[interrupt_number]->purpose() == HandlerPurpose::UnhandledInterruptHandler) {
+    if (s_interrupt_handler[interrupt_number]->type() == HandlerType::UnhandledInterruptHandler) {
         dbg() << "Trying to unregister unused handler (?)";
         return;
     }
     if (s_interrupt_handler[interrupt_number]->is_shared_handler() && !s_interrupt_handler[interrupt_number]->is_sharing_with_others()) {
-        ASSERT(s_interrupt_handler[interrupt_number]->purpose() == HandlerPurpose::SharedIRQHandler);
+        ASSERT(s_interrupt_handler[interrupt_number]->type() == HandlerType::SharedIRQHandler);
         static_cast<SharedIRQHandler*>(s_interrupt_handler[interrupt_number])->unregister_handler(handler);
         if (!static_cast<SharedIRQHandler*>(s_interrupt_handler[interrupt_number])->sharing_devices_count()) {
             revert_to_unused_handler(interrupt_number);
@@ -450,7 +450,7 @@ void unregister_generic_interrupt_handler(u8 interrupt_number, GenericInterruptH
         return;
     }
     if (!s_interrupt_handler[interrupt_number]->is_shared_handler()) {
-        ASSERT(s_interrupt_handler[interrupt_number]->purpose() == HandlerPurpose::IRQHandler);
+        ASSERT(s_interrupt_handler[interrupt_number]->type() == HandlerType::IRQHandler);
         revert_to_unused_handler(interrupt_number);
         return;
     }

Kernel/Devices/FloppyDiskDevice.h

@@ -172,6 +172,8 @@ public:
     virtual ssize_t write(FileDescription&, const u8*, ssize_t) override { return 0; }
     virtual bool can_write(const FileDescription&) const override { return true; }
 
+    virtual const char* purpose() const override { return "Floppy Disk Controller"; }
+
 protected:
     explicit FloppyDiskDevice(DriveType);
 

Kernel/Devices/HardwareTimer.h

@@ -32,7 +32,6 @@ namespace Kernel {
 class HardwareTimer : public IRQHandler {
 public:
     u32 seconds_since_boot();
-
 protected:
     HardwareTimer(u8 irq_number);
     u32 m_seconds_since_boot { 0 };

Kernel/Devices/KeyboardDevice.h

@@ -57,6 +57,8 @@ public:
     virtual ssize_t write(FileDescription&, const u8* buffer, ssize_t) override;
     virtual bool can_write(const FileDescription&) const override { return true; }
 
+    virtual const char* purpose() const override { return class_name(); }
+
 private:
     // ^IRQHandler
     virtual void handle_irq(RegisterState&) override;

Kernel/Devices/PATAChannel.h

@@ -72,6 +72,8 @@ public:
     RefPtr<PATADiskDevice> master_device() { return m_master; };
     RefPtr<PATADiskDevice> slave_device() { return m_slave; };
 
+    virtual const char* purpose() const override { return "PATA Channel"; }
+
 private:
     //^ IRQHandler
     virtual void handle_irq(RegisterState&) override;

Kernel/Devices/PIT.h

@@ -58,6 +58,8 @@ public:
     static PIT& the();
     u32 ticks_this_second() const;
 
+    virtual const char* purpose() const override { return "System Timer"; }
+
 private:
     PIT();
     // ^IRQHandler

Kernel/Devices/PS2MouseDevice.h

@@ -47,6 +47,8 @@ public:
     virtual ssize_t write(FileDescription&, const u8*, ssize_t) override;
     virtual bool can_write(const FileDescription&) const override { return true; }
 
+    virtual const char* purpose() const override { return class_name(); }
+
 private:
     // ^IRQHandler
     void handle_vmmouse_absolute_pointer();

Kernel/Devices/SB16.h

@@ -50,6 +50,8 @@ public:
     virtual ssize_t write(FileDescription&, const u8*, ssize_t) override;
     virtual bool can_write(const FileDescription&) const override { return true; }
 
+    virtual const char* purpose() const override { return class_name(); }
+
 private:
     // ^IRQHandler
     virtual void handle_irq(RegisterState&) override;

Kernel/Interrupts/GenericInterruptHandler.h

@@ -33,7 +33,7 @@
 
 namespace Kernel {
 
-enum class HandlerPurpose : u8 {
+enum class HandlerType : u8 {
     IRQHandler = 1,
     SharedIRQHandler = 2,
     UnhandledInterruptHandler = 3,
@@ -56,7 +56,9 @@ public:
     virtual bool is_shared_handler() const = 0;
     virtual bool is_sharing_with_others() const = 0;
 
-    virtual HandlerPurpose purpose() const = 0;
+    virtual HandlerType type() const = 0;
+    virtual const char* purpose() const = 0;
+    virtual const char* controller() const = 0;
 
     virtual bool eoi() = 0;
     void increment_invoking_counter();

Kernel/Interrupts/IRQHandler.h

@@ -47,7 +47,9 @@ public:
 
     virtual bool eoi() override;
 
-    virtual HandlerPurpose purpose() const override { return HandlerPurpose::IRQHandler; }
+    virtual HandlerType type() const override { return HandlerType::IRQHandler; }
+    virtual const char* purpose() const override { return "IRQ Handler"; }
+    virtual const char* controller() const override { return m_responsible_irq_controller->model(); }
 
     virtual size_t sharing_devices_count() const override { return 0; }
     virtual bool is_shared_handler() const override { return false; }

Kernel/Interrupts/SharedIRQHandler.h

@@ -50,7 +50,9 @@ public:
     virtual bool is_shared_handler() const override { return true; }
     virtual bool is_sharing_with_others() const override { return false; }
 
-    virtual HandlerPurpose purpose() const override { return HandlerPurpose::SharedIRQHandler; }
+    virtual HandlerType type() const override { return HandlerType::SharedIRQHandler; }
+    virtual const char* purpose() const override { return "Shared IRQ Handler"; }
+    virtual const char* controller() const override { return m_responsible_irq_controller->model(); }
 
 private:
     void enable_interrupt_vector();

Kernel/Interrupts/SpuriousInterruptHandler.h

@@ -50,7 +50,9 @@ public:
     virtual bool is_shared_handler() const override { return false; }
     virtual bool is_sharing_with_others() const override { return false; }
 
-    virtual HandlerPurpose purpose() const override { return HandlerPurpose::SpuriousInterruptHandler; }
+    virtual HandlerType type() const override { return HandlerType::SpuriousInterruptHandler; }
+    virtual const char* purpose() const override { return "Spurious Interrupt Handler"; }
+    virtual const char* controller() const override { return m_responsible_irq_controller->model(); }
 
 private:
     void enable_interrupt_vector();

Kernel/Interrupts/UnhandledInterruptHandler.h

@@ -41,7 +41,9 @@ public:
 
     virtual bool eoi() override;
 
-    virtual HandlerPurpose purpose() const override { return HandlerPurpose::UnhandledInterruptHandler; }
+    virtual HandlerType type() const override { return HandlerType::UnhandledInterruptHandler; }
+    virtual const char* purpose() const override { return "Unhandled Interrupt Handler"; }
+    virtual const char* controller() const override { ASSERT_NOT_REACHED(); }
 
     virtual size_t sharing_devices_count() const override { return 0; }
     virtual bool is_shared_handler() const override { return false; }

Kernel/Net/E1000NetworkAdapter.h

@@ -46,6 +46,8 @@ public:
     virtual void send_raw(const u8*, size_t) override;
     virtual bool link_up() override;
 
+    virtual const char* purpose() const override { return class_name(); }
+
 private:
     virtual void handle_irq(RegisterState&) override;
     virtual const char* class_name() const override { return "E1000NetworkAdapter"; }

Kernel/Net/RTL8139NetworkAdapter.h

@@ -47,6 +47,8 @@ public:
     virtual void send_raw(const u8*, size_t) override;
     virtual bool link_up() override { return m_link_up; }
 
+    virtual const char* purpose() const override { return class_name(); }
+
 private:
     virtual void handle_irq(RegisterState&) override;
     virtual const char* class_name() const override { return "RTL8139NetworkAdapter"; }