Cleanup Interrupt

cmake/kernel/interrupt/CMakeLists.txt

@@ -2,4 +2,5 @@ cmake_minimum_required(VERSION 3.14)
 
 target_sources(kernel PUBLIC
         ${CHURLOS_SRC_DIR}/kernel/interrupt/IntDispatcher.cc
+        ${CHURLOS_SRC_DIR}/kernel/interrupt/interrupt_asm.cpp
         )

src/kernel/interrupt/IntDispatcher.cc

@@ -1,44 +1,18 @@
-/*****************************************************************************
- *                                                                           *
- *                         I N T D I S P A T C H E R                         *
- *                                                                           *
- *---------------------------------------------------------------------------*
- * Beschreibung:    Zentrale Unterbrechungsbehandlungsroutine des Systems.   *
- *                  Der Parameter gibt die Nummer des aufgetretenen          *
- *                  Interrupts an. Wenn eine Interrupt Service Routine       *
- *                  registriert ist, wird diese aufgerufen.                  *
- *                                                                           *
- * Autor:           Michael Schoettner, 31.8.2016                            *
- *****************************************************************************/
 #include "IntDispatcher.h"
 #include "device/cpu/CPU.h"
-#include "kernel/system/Globals.h"
 #include "kernel/exception/Bluescreen.h"
 #include "lib/util/System.h"
 
 namespace Kernel {
 
-NamedLogger IntDispatcher::log = NamedLogger("IntDispatcher");
-
-int IntDispatcher::assign(uint8_t vector, ISR &isr) {
-
-    /* hier muss Code eingefuegt werden */
-
+void IntDispatcher::assign(uint8_t vector, ISR &isr) {
     handlerMap[vector] = &isr;
-    log.info() << "Registered ISR for vector " << dec << vector << endl; // TODO: Numbers don't show up in log
-
-    return 0;
 }
 
-int IntDispatcher::dispatch(uint8_t vector) {
-
-    /* hier muss Code eingefuegt werden */
-
+void IntDispatcher::dispatch(uint8_t vector) {
     ISR *isr = handlerMap[vector];
 
     if (isr == nullptr) {
-        log.error() << "No ISR registered for vector " << vector << endl; // TODO: Numbers don't show up in log
-
         // TODO: Throw exception
 
         Util::System::out << "Panic: unexpected interrupt " << vector;
@@ -47,8 +21,6 @@ int IntDispatcher::dispatch(uint8_t vector) {
     }
 
     isr->trigger();
-
-    return 0;
 }
 
 }

src/kernel/interrupt/IntDispatcher.h

@@ -13,9 +13,10 @@
 #ifndef IntDispatcher_include__
 #define IntDispatcher_include__
 
+#include <cstdint>
 #include "ISR.h"
-#include "lib/container//Array.h"
-#include "lib/stream/Logger.h"
+#include "lib/container/Array.h"
+#include "lib/util/RestrictedConstructors.h"
 
 namespace Kernel {
 
@@ -23,7 +24,9 @@ class IntDispatcher {
     friend class InterruptService;
 
 public:
-    // Vektor-Nummern
+    /**
+     * Vector numbers (slots in the IDT)
+     */
     enum Vector {
         TIMER = 32,
         KEYBOARD = 33,
@@ -31,23 +34,19 @@ public:
     };
 
 public:
-    IntDispatcher() = default;
+    MakeDefault(IntDispatcher)
 
-    IntDispatcher(const IntDispatcher &copy) = delete;  // Verhindere Kopieren
+    MakeUnmovable(IntDispatcher)
 
-    // TODO: Rest of constructors
+    MakeUncopyable(IntDispatcher)
 
 private:
-    // Registrierung einer ISR. (Rueckgabewert: 0 = Erfolg, -1 = Fehler)
-    int assign(uint8_t vector, ISR &isr);
+    void assign(uint8_t vector, ISR &isr);
 
-    // ISR fuer 'vector' ausfuehren
-    int dispatch(uint8_t vector);
+    void dispatch(uint8_t vector);
 
 private:
     Container::Array<ISR *, 256> handlerMap = {nullptr};
-
-    static NamedLogger log;
 };
 
 }

src/kernel/interrupt/interrupt_asm.cpp

@@ -0,0 +1,11 @@
+#include "IntDispatcher.h"
+#include "kernel/system/System.h"
+#include "kernel/service/InterruptService.h"
+
+extern "C" void int_disp(uint8_t vector);
+
+void int_disp(uint8_t vector) {
+    auto &interruptService = Kernel::System::getService<Kernel::InterruptService>();
+    interruptService.dispatchInterrupt(static_cast<Kernel::IntDispatcher::Vector>(vector));
+}
+

src/kernel/service/InterruptService.cpp

@@ -1,39 +1,47 @@
 #include "InterruptService.h"
-#include "kernel/exception/Bluescreen.h"
 #include "device/cpu/CPU.h"
-#include "kernel/system/System.h"
+#include "kernel/exception/Bluescreen.h"
 
-// TODO: Move to interrupt_interface or sth.
-extern "C" void int_disp(uint8_t vector);
+namespace Kernel {
 
-void int_disp(uint8_t vector) {
+NamedLogger InterruptService::log = NamedLogger("InterruptService");
 
-    /* hier muss Code eingefuegt werden */
+void InterruptService::assignInterrupt(IntDispatcher::Vector vector, ISR &isr) {
+    intDispatcher.assign(vector, isr);
+    log.info() << "Assigned ISR for vector " << dec << vector << endl;
+}
 
-    // Exception
-    if (vector < 32) {
+void InterruptService::dispatchInterrupt(IntDispatcher::Vector vector) {
+    if (isException(vector)) {
         bs_dump(vector);
         Device::CPU::halt();
 
         // TODO: Exception
     }
 
-    Kernel::System::getService<Kernel::InterruptService>()
-            .dispatchInterrupt(static_cast<Kernel::IntDispatcher::Vector>(vector));
-}
+    if (isSpurious(vector)) {
+        ++spuriousCounter;
+        log.info() << "Intercepted Spurious Interrupt" << endl;
+        return;
+    }
 
-namespace Kernel {
+    sendEndOfInterrupt(); // TODO: Check when to send EOI with the PIC
 
-void InterruptService::assignInterrupt(IntDispatcher::Vector vector, ISR &isr) {
-    intDispatcher.assign(vector, isr);
-}
-
-void InterruptService::dispatchInterrupt(IntDispatcher::Vector vector) {
     intDispatcher.dispatch(vector);
 }
 
+bool InterruptService::isException(IntDispatcher::Vector vector) {
+    return vector < IntDispatcher::TIMER;
+}
+
+bool InterruptService::isSpurious(IntDispatcher::Vector vector) {
+    // TODO
+    return false;
+}
+
 void InterruptService::allowInterrupt(Device::PIC::Irq irq) {
     Device::PIC::allow(irq);
+    log.info() << "Allowed IRQ" << dec << irq << endl;
 }
 
 void InterruptService::forbidInterrupt(Device::PIC::Irq irq) {
@@ -44,4 +52,8 @@ bool InterruptService::status(Device::PIC::Irq irq) {
     return Device::PIC::status(irq);
 }
 
+void InterruptService::sendEndOfInterrupt() {
+    // TODO
+}
+
 }

src/kernel/service/InterruptService.h

@@ -4,6 +4,7 @@
 #include "Service.h"
 #include "kernel/interrupt/IntDispatcher.h"
 #include "device/interrupt/PIC.h"
+#include "lib/stream/Logger.h"
 
 namespace Kernel {
 
@@ -25,6 +26,8 @@ public:
 
     void dispatchInterrupt(IntDispatcher::Vector vector);
 
+    bool isException(IntDispatcher::Vector vector);
+
     bool isSpurious(IntDispatcher::Vector vector);
 
     void allowInterrupt(Device::PIC::Irq irq);
@@ -37,6 +40,10 @@ public:
 
 private:
     IntDispatcher intDispatcher;
+
+    uint32_t spuriousCounter;
+
+    static NamedLogger log;
 };
 
 }