ass

maybe need to add more apps if hardware has more cores

1

@@ -0,0 +1,195 @@
+#include "arch/lapic.h"
+#include "boot/startup_ap.h"
+#include "arch/core_interrupt.h"
+#include "debug/copystream.h"
+#include "debug/output.h"
+#include "debug/assert.h"
+
+#include "arch/cga.h"
+#include "arch/textwindow.h"
+#include "arch/serial.h"
+#include "device/serialstream.h"
+#include "device/textstream.h"
+#include "device/ps2controller.h"
+#include "arch/ioapic.h"
+#include "thread/scheduler.h"
+#include "user/app1/appl.h"
+#include "sync/ticketlock.h"
+#include "interrupt/guard.h"
+
+#include "arch/context.h"
+#include "thread/thread.h"
+
+///TextStream kout = TextStream(0, 80, 0, 10, true);
+Ticketlock koutlock;
+Scheduler sch;
+
+//TextStream dout[8] = {
+//    TextStream(0 ,20,12,25,false), 
+//    TextStream(20,40,12,25,false),
+//    TextStream(40,60,12,25,false),
+//    TextStream(60,80,12,25,false),
+//    TextStream(0 ,0 ,0, 0,false),
+//    TextStream(0 ,0 ,0, 0,false),
+//    TextStream(0 ,0 ,0, 0,false),
+//    TextStream(0 ,0 ,0, 0,false),
+//};
+
+
+TextStream dout[Core::MAX] = {
+    {0,  40, 10, 14},
+    {40, 80, 10, 14},
+    {0,  40, 14, 18},
+    {40, 80, 14, 18},
+    {0,  40, 18, 22},
+    {40, 80, 18, 22},
+    {0,  40, 22, 25},
+    {40, 80, 22, 25},
+};
+
+CopyStream copystream[Core::MAX]{
+    {&dout[0], &sout},
+    {&dout[1], &sout},
+    {&dout[2], &sout},
+    {&dout[3], &sout},
+    {&dout[4], &sout},
+    {&dout[5], &sout},
+    {&dout[6], &sout},
+    {&dout[7], &sout},
+};
+
+OutputStream* copyout[Core::MAX]{
+    &dout[0],
+    &copystream[1],
+    &dout[2],
+    &dout[3],
+    &dout[4],
+    &dout[5],
+    &dout[6],
+    &dout[7]
+};
+
+unsigned int testx, testy;
+
+uint8_t test1_stack[1024];
+uint8_t test2_stack[1024];
+uint8_t test3_stack[1024];
+uint8_t test4_stack[1024];
+uint8_t test5_stack[1024];
+uint8_t test6_stack[1024];
+uint8_t test7_stack[1024];
+uint8_t test8_stack[1024];
+uint8_t test9_stack[1024];
+
+
+
+//Thread test1_thread = Thread(&test1_stack[sizeof(test1_stack)-1]);
+Application application1 = Application(&test1_stack[sizeof(test1_stack)-1]);
+Application application2 = Application(&test2_stack[sizeof(test2_stack)-1]);
+Application application3 = Application(&test3_stack[sizeof(test3_stack)-1]);
+Application application4 = Application(&test4_stack[sizeof(test4_stack)-1]);
+Application application5 = Application(&test5_stack[sizeof(test5_stack)-1]);
+Application application6 = Application(&test6_stack[sizeof(test5_stack)-1]);
+Application application7 = Application(&test7_stack[sizeof(test5_stack)-1]);
+Application application8 = Application(&test8_stack[sizeof(test5_stack)-1]);
+Application application9 = Application(&test9_stack[sizeof(test5_stack)-1]);
+
+//Context test2;
+//uint8_t test2_stack[256];
+//Thread test2_thread = Thread(&test2_stack[sizeof(test2_stack)-1]);
+
+//void test_func1(){
+//    while(1){
+//        {
+//            Guarded g = Guard::enter();
+//            g.vault().kout << "test 1\n" << flush;
+//        }
+//        context_switch(&test2, &test1);
+//    }
+//}
+//
+//void test_func2(){
+//    while(1){
+//        {
+//            Guarded g = Guard::enter();
+//            g.vault().kout << "test 2\n" << flush;
+//        }
+//        context_switch(&test1, &test2);
+//    }
+//}
+
+
+// Main function
+// (the bootstrap processor starts here)}
+extern "C" int main() {
+  CGA::setCursor(0, 0);
+
+  unsigned int numCPUs = Core::count();
+  /* Start application processors
+   * To avoid unexpected behaviour, make sure that interrupts are not
+   * enabled before the APs are booted. Otherwise it might interfere with the
+   * Startup IPIs or even block devices like keyboard because of a missing EOI
+   */
+
+  {
+      Guarded g = Guard::enter();
+      sch.ready(&application1);
+      sch.ready(&application2);
+      sch.ready(&application3);
+      sch.ready(&application4);
+      sch.ready(&application5);
+      sch.ready(&application6);
+      sch.ready(&application7);
+      sch.ready(&application8);
+      sch.ready(&application9);
+  }
+
+  ApplicationProcessor::boot();
+  
+  PS2Controller::init();
+
+  IOAPIC::init();
+  IOAPIC::config(1, Core::Interrupt::KEYBOARD);
+  IOAPIC::allow(1);
+
+  Core::Interrupt::enable();
+
+  PS2Controller::drainBuffer();
+
+  DBG << "Main CPU " << static_cast<int>(LAPIC::getID()) << endl << flush;
+
+
+
+  {
+      Guarded g = Guard::enter();
+      sch.schedule();
+  }
+
+
+  //Application{}.action();
+  while (true){
+      //DBG << "pos: " << testx << ", " << testy << endl << flush;
+      //Core::pause();
+  }
+
+  return 0;
+}
+
+// Main function for application processors
+extern "C" int main_ap() {
+  DBG_VERBOSE << "CPU core " << static_cast<int>(Core::getID()) << " / LAPIC "
+              << static_cast<int>(LAPIC::getID()) << " in main_ap()" << endl;
+  Core::Interrupt::enable();
+
+  DBG << "App CPU " << static_cast<int>(Core::getID()) << endl << flush;
+
+  {
+      Guarded g = Guard::enter();
+      sch.schedule();
+  }
+
+  //assert(Core::getID() != 1);
+  //Application{}.action();
+
+  return 0;
+}

arch/context.asm

@@ -7,14 +7,30 @@
 ; and populates the registers from the the next context.
 align 16
 context_switch:
+    mov  [rsi +  0],  rbx
+    mov  [rsi +  8],  rbp
+    mov  [rsi + 16],  r12
+    mov  [rsi + 24],  r13
+    mov  [rsi + 32],  r14
+    mov  [rsi + 40],  r15
+    mov  [rsi + 48],  rsp
 
 ; context_launch populates the register set from the next context structure.
 ; It does not save the current registers.
 align 16 ; When only one parameter is used for `align`, it will use NOP
 context_launch:
-
+    mov  rbx, [rdi +  0] 
+    mov  rbp, [rdi +  8] 
+    mov  r12, [rdi + 16] 
+    mov  r13, [rdi + 24] 
+    mov  r14, [rdi + 32] 
+    mov  r15, [rdi + 40] 
+    mov  rsp, [rdi + 48] 
+    ret
 ; fake_systemv_abi is used to populate the volatile argument registers used by the systemv abi (rdi, rsi, ...)
 ; with values from the non-volatile registers saved within the thread context (r15, r14, ...)
 align 16
 fake_systemv_abi:
-
+mov rdi, r15
+mov rsi, r14
+ret

arch/context.cc

@@ -1,9 +1,21 @@
 #include "context.h"
+#include "../debug/output.h"
+
+void panic(){
+    DBG << "panic!\n" << flush;
+    while(1);
+}
 
 void prepareContext(void* tos, Context& context, void (*kickoff)(void*),
                     void* param1) {
-  (void)tos;
+    ((uint64_t*)tos)[0] = (uint64_t)panic;
-  (void)context;
+    ((uint64_t*)tos)[-1] = (uint64_t)kickoff;
-  (void)kickoff;
+    ((uint64_t*)tos)[-2] = (uint64_t)fake_systemv_abi;
-  (void)param1;
+    context.rsp = (void*)(((uint64_t) tos)-16);
+    context.rbx = 0;
+    context.rbp = 0;
+    context.r12 = 0;
+    context.r13 = 0;
+    context.r14 = 0;
+    context.r15 = (uint64_t)param1;
 }

arch/core_interrupt.h

@@ -68,7 +68,9 @@ enum Vector {
 
   // Interrupts
   KEYBOARD=32,
-  PANIC=33
+  PANIC=33,
+  TIMER=34,
+  ASS=25
 };
 constexpr size_t VECTORS = 256;
 

arch/lapic.h

@@ -156,7 +156,7 @@ void set(uint32_t counter, uint8_t divide, uint8_t vector, bool periodic,
  *
  * Initializes the \ref LAPIC::Timer
  * in such a way that regular interrupts are triggered approx. every `us`
- * microseconds when \ref LAPIC::Timer:::activate() is called.
+ * microseconds when \ref LAPIC::Timer::activate() is called.
  * For this purpose, a suitable timer divisor is determined
  * based on the timer frequency determined with \ref LAPIC::Timer::ticks().
  * This timer divisor has to be as small as possible, but large enough to

arch/lapic_timer.cc

@@ -1,5 +1,9 @@
 #include "lapic.h"
 #include "lapic_registers.h"
+#include "core.h"
+#include "pit.h"
+
+#include "../debug/output.h"
 
 namespace LAPIC {
 namespace Timer {
@@ -56,36 +60,118 @@ static const Register div_masks[] = {
  *  \param div Divider, must be power of two: 1, 2, 4, 8, 16, 32, 64, 128
  *  \return Bit mask for LAPIC::setTimer() or `0xff` if `div` is invalid.
  */
-Register getClockDiv(uint8_t div) {
+static Register getClockDiv(uint8_t div) {
-  (void)div;
+  switch (div) {
-  return 0;
+    case   1: return div_masks[0];
+    case   2: return div_masks[1];
+    case   4: return div_masks[2];
+    case   8: return div_masks[3];
+    case  16: return div_masks[4];
+    case  32: return div_masks[5];
+    case  64: return div_masks[6];
+    case 128: return div_masks[7];
+    default : return 0xff;
+  }
+}
+/*! \brief Calculate the LAPIC-timer divider for the bit mask.
+ *  \param div_mask The bit mask, must be one of: 0xb, 0x0, 0x1, 0x2, 0x3, 0x8, 0x9, 0xa
+ *  \return LAPIC-timer divider or `0xff` if `div_mask` is invalid.
+ */
+static uint8_t fromClockDiv(Register div_mask) {
+  if (div_mask == div_masks[0]) return   1;
+  if (div_mask == div_masks[1]) return   2;
+  if (div_mask == div_masks[2]) return   4;
+  if (div_mask == div_masks[3]) return   8;
+  if (div_mask == div_masks[4]) return  16;
+  if (div_mask == div_masks[5]) return  32;
+  if (div_mask == div_masks[6]) return  64;
+  if (div_mask == div_masks[7]) return 128;
+  return 0xff;
 }
 
+
 uint32_t ticks(void) {
-  uint32_t ticks = 0;  // ticks per millisecond
+  static uint32_t ticks = 0;  // ticks per millisecond
-  // Calculation (Assignment 5)
+  if (ticks != 0) return ticks;
+
+  // Prepare Counter
+  LAPIC::Timer::set(0, 1, 0, false, true);
+  
+  // Set timer for 10ms
+  PIT::set(10 * 1000); 
+  // Start LAPIC-Timer
+  LAPIC::write(TIMER_INITIAL_COUNTER, UINT32_MAX);
+  PIT::waitForTimeout();
+  // Get final Count
+  uint32_t counter = LAPIC::read(TIMER_CURRENT_COUNTER);
+  // Disable LAPIC-Timer
+  LAPIC::write(TIMER_INITIAL_COUNTER, 0);
+  // Calculate tick count.
+  ticks = (UINT32_MAX - counter) / 10;
+
+  DBG << "LAPIC-Timer calibration using PIT" << endl;
   return ticks;
 }
 
 void set(uint32_t counter, uint8_t divide, uint8_t vector, bool periodic,
          bool masked) {
-  (void)counter;
+  if (divide == 0 || (divide & (divide - 1)) != 0) {
-  (void)divide;
+    // Not a power of 2
-  (void)vector;
+    return;
-  (void)periodic;
+  }
-  (void)masked;
+
+  ControlRegister tcr;
+  tcr.vector = Core::Interrupt::Vector::TIMER;
+  tcr.timer_mode = periodic ? PERIODIC : ONE_SHOT;
+  tcr.masked = masked ? MASKED : NOT_MASKED;
+  LAPIC::write(TIMER_CONTROL, tcr.value);
+  
+  LAPIC::write(TIMER_DIVIDE_CONFIGURATION, getClockDiv(divide));
+  LAPIC::write(TIMER_INITIAL_COUNTER, counter);
 }
 
 bool setup(uint32_t us) {
-  (void)us;
+  uint64_t timer_ticks = (static_cast<uint64_t>(ticks()) * us) / 1000ULL;
-  return false;
+    
+  uint8_t divisor = 1;
+  while (timer_ticks > UINT32_MAX) {
+    // While timer_ticks is to large to fit in 32bits.
+    timer_ticks >>= 1;
+    divisor <<= 1;
+  }
+  if (divisor > 128) 
+      return false; // Timer interval is to large.
+    
+  // Setup Masked interrupts to effectively disable the timer.
+  set(static_cast<uint32_t>(timer_ticks), divisor, Core::Interrupt::TIMER, true, true);
+  return true;
+}
+
+uint32_t interval() {
+  uint32_t timer_ticks = LAPIC::read(TIMER_INITIAL_COUNTER);
+  uint32_t divisor = fromClockDiv(LAPIC::read(TIMER_DIVIDE_CONFIGURATION));
+
+  uint64_t us = (static_cast<uint64_t>(timer_ticks) * divisor * 1000ULL) / static_cast<uint64_t>(ticks());
+  return static_cast<uint32_t>(us);
 }
 
-uint32_t interval() { return 0; }
+void activate() {
+  uint32_t timer_ticks = LAPIC::read(TIMER_INITIAL_COUNTER);
+  // Disable Counter to avoid spouriose interrupts.
+  LAPIC::write(TIMER_INITIAL_COUNTER, 0);
 
-void activate() {}
+  // Activate Timer interrupts.
+  setMasked(false);
 
-void setMasked(bool masked) { (void)masked; }
+  // enable counter with correct value.
+  LAPIC::write(TIMER_INITIAL_COUNTER, timer_ticks);
+}
 
+void setMasked(bool masked) { 
+  ControlRegister tcr;
+  tcr.value = LAPIC::read(TIMER_CONTROL);
+  tcr.masked = masked ? MASKED : NOT_MASKED;
+  LAPIC::write(TIMER_CONTROL, tcr.value);
+}
 }  // namespace Timer
 }  // namespace LAPIC

boot/multiboot/data.cc

@@ -1,4 +1,4 @@
-#include "boot/multiboot/data.h"
+#include "./data.h"
 
 /*! \brief Multiboot Information Structure according to Specification
  * \see [Multiboot Specification]{@ref multiboot}

interrupt/epilogues.cc

@@ -2,18 +2,34 @@
 
 #include "../debug/output.h"
 #include "guard.h"
+#include "../thread/scheduler.h"
 
 extern Key kout_key;
 
 namespace Epilogues {
 
-void keyboard(Vault& g) {
+void keyboard(Vault& v) {
-    g.kout.setPos(0,0);
+    v.kout.setPos(0,0);
-    g.kout << kout_key.ascii() << flush ;
+    v.kout << kout_key.ascii() << flush ;
 
 }
 
-void timer(Vault& g) { (void)g; }
+void timer(Vault& v) { 
+    static int counter = 0;
+    int x, y;
+    if(Core::getID() == 0) {
+        v.kout.getPos(x, y);
+        v.kout.setPos(65U, 0U);
+        v.kout << counter++ << " " << flush;
+        v.kout.setPos(x, y);
+    }
 
-void assassin(Vault& g) { (void)g; }
+    v.sch.resume(true);
+}
+
+void assassin(Vault& v) {
+    if (v.sch.active()->kill_flag) {
+        v.sch.exit();
+    }
+}
 };  // namespace Epilogues

interrupt/epilogues.h

@@ -28,7 +28,7 @@ namespace Epilogues {
  * \todo(15) Store the key to the keyboard buffer for user threads. Wake user
  * threads waiting for a key using the key semaphore.
  *
- * @param g
+ * @param v The vault.
  */
 void keyboard(Vault& g);
 
@@ -37,7 +37,7 @@ void keyboard(Vault& g);
  * \todo(15) Preemptively reschedule threads
  * \todo(16) Check the bellringer
  * \todo(17) Refresh screen with fixed FPS rate
- * @param g
+ * @param v The vault.
  */
 void timer(Vault& g);
 
@@ -45,6 +45,7 @@ void timer(Vault& g);
  *  it is set.
  *
  * \todo(15) Implement the rescheduling (in \MPStuBS only)
+ * @param v The vault.
  */
 void assassin(Vault& g);
 };  // namespace Epilogues

interrupt/guard.h

@@ -2,18 +2,19 @@
  *  \brief \ref Guard synchronizes access to epilogue level
  */
 
-#pragma once
+//#pragma once
 #include "../object/bbuffer.h"
 #include "../object/key.h"
 #include "../types.h"
 #include "epilogues.h"
 #include "../device/textstream.h"
-
+#include "../thread/scheduler.h"
 //! \brief The epilogue vault contains the protected data for the epilogue level
+
 struct Vault {
   Vault();
   TextStream kout = TextStream(0, 80, 0, 10, true);
-
+  Scheduler sch = Scheduler();
   // no copy
   Vault(const Vault&) = delete;
   Vault& operator=(const Vault&) = delete;

interrupt/handlers.cc

@@ -1,4 +1,4 @@
-#include "handlers.h"
+#include "./handlers.h"
 
 #include "../arch/core_cr.h"
 #include "../arch/idt.h"
@@ -29,8 +29,7 @@ void printContext(const InterruptContext *context) {
 
 [[gnu::interrupt]] void handle_double_fault(InterruptContext *context,
                                             uint64_t error) {
-  (void)error;
+  DBG << "Double fault encountered. Error code: " << dec << error << endl;
-  DBG << "Double fault encoutered" << endl;
   printContext(context);
   kernelpanic("Double fault!");
 }
@@ -61,8 +60,7 @@ enum PAGE_FAULT_ERROR {
 
 [[gnu::interrupt]] void handle_page_fault(InterruptContext *context,
                                           uint64_t error) {
-  (void)error;
+  DBG << "Page fault encountered at linear address " << hex
-  DBG << "Page fault encoutered at linear address " << hex
       << Core::CR<2>::read() << endl
       << (error & PF_ERR_PRESENT ? "present" : "non-present") << " page|"
       << (error & PF_ERR_WRITE ? "write" : "read") << " access|"
@@ -73,9 +71,6 @@ enum PAGE_FAULT_ERROR {
   kernelpanic("Page fault!");
 }
 
-extern Ticketlock koutlock;
-extern Vault keyboard_vault;
-
 void handle_keyboard() {
     //Key key = Key();
     if (PS2Controller::fetch(kout_key)) {
@@ -83,9 +78,6 @@ void handle_keyboard() {
       if (kout_key.ctrl() && kout_key.alt() && kout_key.scancode == Key::KEY_DEL)
         System::reboot();
       Guard::relay(Epilogues::keyboard);
-        //koutlock.lock();
-        //kout << key.ascii() << endl << flush ;
-        //koutlock.unlock();
     }
     else
       LAPIC::endOfInterrupt();
@@ -99,10 +91,14 @@ void handle_keyboard() {
 
 [[gnu::interrupt]] void handle_timer(InterruptContext *context) {
   (void)context;
+  LAPIC::endOfInterrupt();
+  Guard::relay(Epilogues::timer);
 }
 
 [[gnu::interrupt]] void handle_assassin(InterruptContext *context) {
   (void)context;
+  LAPIC::endOfInterrupt();
+  Guard::relay(Epilogues::assassin);
 }
 [[gnu::interrupt]] void handle_wakeup(InterruptContext *context) {
   (void)context;
@@ -122,10 +118,16 @@ void initInterruptHandlers() {
   IDT::set(Core::Interrupt::Vector::PAGE_FAULT,
            IDT::InterruptDescriptor::ReturningWithError(handle_page_fault));
 
+  IDT::set(Core::Interrupt::Vector::TIMER,
+           IDT::InterruptDescriptor::Returning(handle_timer));
+
   // TODO: Add more handlers here
   IDT::set(Core::Interrupt::Vector::KEYBOARD,
            IDT::InterruptDescriptor::Returning(handle_keyboard_asm));
-
+  IDT::set(Core::Interrupt::Vector::TIMER,
+          IDT::InterruptDescriptor::Returning(handle_timer));
+  IDT::set(Core::Interrupt::Vector::ASS,
+          IDT::InterruptDescriptor::Returning(handle_assassin));
    // Load the idt pointer
   IDT::load();
 }

main.cc

@@ -12,12 +12,17 @@
 #include "device/textstream.h"
 #include "device/ps2controller.h"
 #include "arch/ioapic.h"
+#include "thread/scheduler.h"
 #include "user/app1/appl.h"
 #include "sync/ticketlock.h"
 #include "interrupt/guard.h"
 
+#include "arch/context.h"
+#include "thread/thread.h"
+
 ///TextStream kout = TextStream(0, 80, 0, 10, true);
 Ticketlock koutlock;
+//Scheduler sch;
 
 //TextStream dout[8] = {
 //    TextStream(0 ,20,12,25,false), 
@@ -30,6 +35,7 @@ Ticketlock koutlock;
 //    TextStream(0 ,0 ,0, 0,false),
 //};
 
+
 TextStream dout[Core::MAX] = {
     {0,  40, 10, 14},
     {40, 80, 10, 14},
@@ -65,6 +71,29 @@ OutputStream* copyout[Core::MAX]{
 
 unsigned int testx, testy;
 
+uint8_t test1_stack[1024];
+uint8_t test2_stack[1024];
+uint8_t test3_stack[1024];
+uint8_t test4_stack[1024];
+uint8_t test5_stack[1024];
+uint8_t test6_stack[1024];
+uint8_t test7_stack[1024];
+uint8_t test8_stack[1024];
+uint8_t test9_stack[1024];
+
+
+
+Application application1 = Application(&test1_stack[sizeof(test1_stack)-1]);
+Application application2 = Application(&test2_stack[sizeof(test2_stack)-1]);
+Application application3 = Application(&test3_stack[sizeof(test3_stack)-1]);
+Application application4 = Application(&test4_stack[sizeof(test4_stack)-1]);
+Application application5 = Application(&test5_stack[sizeof(test5_stack)-1]);
+Application application6 = Application(&test6_stack[sizeof(test5_stack)-1]);
+Application application7 = Application(&test7_stack[sizeof(test5_stack)-1]);
+Application application8 = Application(&test8_stack[sizeof(test5_stack)-1]);
+Application application9 = Application(&test9_stack[sizeof(test5_stack)-1]);
+
+
 // Main function
 // (the bootstrap processor starts here)}
 extern "C" int main() {
@@ -77,6 +106,22 @@ extern "C" int main() {
    * Startup IPIs or even block devices like keyboard because of a missing EOI
    */
 
+  {
+      Guarded g = Guard::enter();
+      Scheduler &sch =g.vault().sch;
+      sch.ready(&application1);
+      sch.ready(&application2);
+      sch.ready(&application3);
+      sch.ready(&application4);
+      sch.ready(&application5);
+      sch.ready(&application6);
+      sch.ready(&application7);
+      sch.ready(&application8);
+      sch.ready(&application9);
+  }
+
+  LAPIC::Timer::setup(1000000);
+
   ApplicationProcessor::boot();
   
   PS2Controller::init();
@@ -87,11 +132,20 @@ extern "C" int main() {
 
   Core::Interrupt::enable();
 
+  LAPIC::Timer::activate();
   PS2Controller::drainBuffer();
 
   DBG << "Main CPU " << static_cast<int>(LAPIC::getID()) << endl << flush;
 
-  Application{}.action();
+
+
+  {
+      Guarded g = Guard::enter();
+     g.vault().sch.schedule();
+  }
+
+
+  //Application{}.action();
   while (true){
       //DBG << "pos: " << testx << ", " << testy << endl << flush;
       //Core::pause();
@@ -108,8 +162,13 @@ extern "C" int main_ap() {
 
   DBG << "App CPU " << static_cast<int>(Core::getID()) << endl << flush;
 
+  {
+      Guarded g = Guard::enter();
+      g.vault().sch.schedule();
+  }
+
   //assert(Core::getID() != 1);
-  Application{}.action();
+  //Application{}.action();
 
   return 0;
 }

notes

@@ -0,0 +1,4 @@
+scheduler in vault
+next implementieren
+thread kill nicht in die liste enqueuen, scheduler.cc zeile 26
+setzen von epi flags interrupt vermutlich disablen. 

object/queue.h

@@ -11,39 +11,16 @@
 /*! \brief Templated Queue for arbitrary objects.
  *
  * Queue is implemented by a head-object (Queue<T>) and next-pointers embedded
- * in the queued objects. This Queue supports arrays of next-pointers by passing
+ * in the queued objects. By passing a different get_link function into the
- * an index into the constructor identifying the index into the next-pointer
+ * constructor, the member name of the next-pointer can be changed and objects
- * array. By passing a different get_link function into the constructor, the
+ * can be contained in different independent queues.
- * member name of the next-pointer array can be changed and objects can be
- * contained in different independent queues.
  */
 template <class T>
 class Queue {
-  /*! \brief Default get_link implementation returns a pointer to the
+  /// Default get_link implementation returns a pointer to the next-pointer.
-   * link_index'th element of the next-pointer array.
+  static T** default_get_link(T& obj) { return &obj.queue_link; }
-   * The function assumes a member named "queue_link" that stores the
-   * next-pointer.
-   *
-   * If your object contains a queue_link member you can just ignore this
-   * function and the get_link keyword argument of the constructor.
-   *
-   * \param[in] obj the object whose link should be accessed.
-   * \param[in] link_index the index within the array.
-   *
-   * \return A pointer to the next-object pointer.
-   */
-  static T** default_get_link(T& obj, unsigned link_index) {
-    assert(link_index < sizeof(T::queue_link) / sizeof(void*));
-    return &obj.queue_link[link_index];
-  }
   /// Type definition for the get_link function
-  typedef T** (*NextFunc)(T&, unsigned);
+  typedef T** (*NextFunc)(T&);
-
-  /// Queue-local index into the next-pointer array
-  unsigned link_index;
-
-  /// Provides the same signature for single- and multi-core Queue
-  T** get_link_wrapped(T& obj) { return get_link(obj, link_index); }
 
   /// Function pointer to the get_link function, called whenever the
   /// next pointer array is referenced
@@ -106,18 +83,15 @@ class Queue {
   constexpr Queue(Queue&&) = default;
 
   /*! \brief Constructor
-   *	\param[in] link_index denotes the index into the next-pointer array
-   *						  to be used by this
-   *queue-object
    *	\param[in] get_link A function pointer to the get_link, i.e. a function
    *						which returns a pointer to the
    *next-pointer of an element in the Queue.
    */
-  explicit Queue(unsigned link_index, NextFunc get_link = default_get_link)
+  explicit Queue(NextFunc get_link = default_get_link)
-      : link_index(link_index),
+      : get_link(get_link), head(nullptr), tail(nullptr) {
-        get_link(get_link),
+    assert(get_link != nullptr &&
-        head(nullptr),
+           "get_link function pointer must not be nullptr!");
-        tail(nullptr) {}
+  };
 
   /*! \brief Enqueues the provided item at the end of the queue. If the element
    *	is already contained in the queue, false will be returned
@@ -126,7 +100,7 @@ class Queue {
    *		   or not (and it is now enqueued, then true)
    */
   bool enqueue(T& item) {
-    T** nextptr = get_link_wrapped(item);
+    T** nextptr = get_link(item);
     if (*nextptr != nullptr || (head != nullptr && tail == &item)) {
       return false;
     }
@@ -136,7 +110,7 @@ class Queue {
       head = tail = &item;
     } else {
       assert(tail != nullptr);
-      *get_link_wrapped(*tail) = &item;
+      *get_link(*tail) = &item;
       tail = &item;
     }
     return true;
@@ -147,7 +121,7 @@ class Queue {
    *  \return true if successful, false if item was already in the queue
    **/
   bool insertFirst(T& item) {
-    T** nextptr = get_link_wrapped(item);
+    T** nextptr = get_link(item);
     if (*nextptr != nullptr || (head != nullptr && tail == &item)) {
       return false;
     }
@@ -177,13 +151,13 @@ class Queue {
     if (&after == tail) {
       return enqueue(item);
     }
-    T** nextptr = get_link_wrapped(item);
+    T** nextptr = get_link(item);
     // if item is already in the list return false
     if (*nextptr != nullptr || tail == &item) {
       return false;
     }
 
-    T** pnextptr = get_link_wrapped(after);
+    T** pnextptr = get_link(after);
     // if after is NOT in the list, return false
     if (!(pnextptr != nullptr || tail == &after)) {
       return false;
@@ -201,8 +175,7 @@ class Queue {
    *not in this list
    **/
   T* next(T& item) {
-    T** nextptr = get_link_wrapped(item);
+    T** nextptr = get_link(item);
-    // if item is already in the list return nullptr
     if (head == nullptr || (*nextptr == nullptr && tail != &item)) {
       return nullptr;
     }
@@ -222,7 +195,7 @@ class Queue {
   T* dequeue() {
     T* out = head;
     if (head != nullptr) {
-      T** nextptr = get_link_wrapped(*head);
+      T** nextptr = get_link(*head);
       head = *nextptr;
       *nextptr = nullptr;
     }
@@ -239,21 +212,21 @@ class Queue {
     T** next_link;
 
     if (head == that) {
-      head = *get_link_wrapped(*head);
+      head = *get_link(*head);
 
-      *get_link_wrapped(*that) = nullptr;
+      *get_link(*that) = nullptr;
       return that;
     }
     while (cur) {
-      next_link = get_link_wrapped(*cur);
+      next_link = get_link(*cur);
       if (*next_link == that) {
-        *next_link = *get_link_wrapped(**next_link);
+        *next_link = *get_link(**next_link);
 
         if (that == tail) {
           tail = cur;
         }
 
-        *get_link_wrapped(*that) = nullptr;
+        *get_link(*that) = nullptr;
         return that;
       }
       cur = *next_link;

sync/bellringer.cc

@@ -1,19 +1,6 @@
-#include "bellringer.h"
+#include "./bellringer.h"
 
 #include "../interrupt/guard.h"
-#include "../thread/thread.h"
-
-struct Bell {
-  // link pointer to the next bell in the bellringers bell list
-  Bell *queue_link[1] = {nullptr};
-
-  Thread *thread;
-  size_t counter;
-};
-
-Bell **Bellringer::bell_link(Bell &obj, unsigned link_index) {
-  return &obj.queue_link[link_index];
-}
 
 // check: Checks whether bells are running out of time and rings them if
 // necessary

sync/bellringer.h

@@ -4,10 +4,10 @@
 
 #pragma once
 #include "../object/queue.h"
+#include "../thread/thread.h"
 #include "../types.h"
 
 struct Vault;
-struct Bell;
 
 /*! \brief Manages and activates time-triggered activities.
  *  \ingroup ipc
@@ -24,6 +24,14 @@ class Bellringer {
   Bellringer(const Bellringer&) = delete;
   Bellringer& operator=(const Bellringer&) = delete;
 
+  struct Bell {
+    // link pointer to the next bell in the bellringers bell list
+    Bell* queue_link = nullptr;
+
+    Thread* thread;
+    size_t counter;
+  };
+
   /*! \brief List of bells currently managed.
    *
    * This list contains non-expired bells enqueued by job().
@@ -34,26 +42,26 @@ class Bellringer {
    */
   Queue<Bell> bells;
 
-  //! Link pointer for bells
-  static Bell** bell_link(Bell& obj, unsigned link_index);
-
  public:
   // constructor
-  Bellringer() : bells(0, bell_link) {}
+  Bellringer() : bells() {}
 
   /*! \brief Checks whether there are bells to be rung.
    *
    *  Every call to check elapses a tick. Once such a tick reduces a bells
    *  remaining time to zero, the bell will be rung.
    *
+   *  \param vault The vault containing the bellringer instance
+   *
    *  \todo(16) Implement Method
    */
   void check(Vault& vault);
 
   /*! \brief Passes a `bell` to the bellringer to be rung after `ms`
    *  milliseconds.
-   *  \param bell Bell that should be rung after `ms` milliseconds
+   *
-   *  \param ms number of milliseconds that should be waited before
+   *  \param vault The vault containing the bellringer instance
+   *  \param ms Number of milliseconds that should be waited before
    *  ringing the bell
    *
    *  \todo(16) Implement Method

sync/semaphore.cc

@@ -1,16 +1,7 @@
 #include "./semaphore.h"
 
-#include "../interrupt/guard.h"
-#include "../thread/thread.h"
-
 Semaphore::Semaphore(unsigned c) { (void)c; }
 
-Thread **Semaphore::thread_link(Thread &obj, unsigned link_index) {
-  (void)obj;
-  (void)link_index;
-  return nullptr;
-}
-
 void Semaphore::p(Vault &vault) { (void)vault; }
 
 void Semaphore::v(Vault &vault) { (void)vault; }

sync/semaphore.h

@@ -26,8 +26,6 @@ class Semaphore {
   Semaphore(const Semaphore&) = delete;
   Semaphore& operator=(const Semaphore&) = delete;
 
-  static Thread** thread_link(Thread& obj, unsigned link_index);
-
  public:
   /*! \brief Constructor; initialized the counter with provided value `c`
    *  \param c Initial counter value

sync/ticketlock.h

@@ -3,6 +3,7 @@
  */
 
 #pragma once
+#include "../types.h"
 
 #include "../arch/core.h"
 #include "../arch/cache.h"

thread/dispatcher.cc

@@ -1,17 +1,32 @@
 // vim: set noet ts=4 sw=4:
 
 #include "dispatcher.h"
+#include "../arch/core.h"
 
-Dispatcher::Dispatcher() {}
+Dispatcher::Dispatcher() {
+}
 
-Thread *Dispatcher::active() { return nullptr; }
+Thread *Dispatcher::active() {
+	return lifePointer[Core::getID()];
+}
 
 bool Dispatcher::isActive(const Thread *thread, unsigned *cpu) {
-  (void)thread;
+	for(uint8_t i=0; i<Core::MAX; i++){
-  (void)cpu;
+		if(thread == lifePointer[i]){
+			*cpu = i;
+			return true;
+		}
+	}
+	cpu = nullptr;
 	return false;
 }
 
-void Dispatcher::go(Thread *first) { (void)first; }
+void Dispatcher::go(Thread *first) {
+	lifePointer[Core::getID()] = first;
+	first->go();
+}
 
-void Dispatcher::dispatch(Thread *next) { (void)next; }
+void Dispatcher::dispatch(Thread *next) {
+	lifePointer[Core::getID()] = next;
+	lifePointer[Core::getID()]->resume(next);
+}

thread/dispatcher.h

@@ -6,6 +6,7 @@
 #pragma once
 #include "../thread/thread.h"
 #include "../types.h"
+#include "../arch/core.h"
 
 /*! \brief The dispatcher dispatches threads and puts the scheduler's
  *  decisions into action.
@@ -23,12 +24,14 @@ class Dispatcher {
    */
   void setActive(Thread* thread) { (void)thread; }
 
+
  public:
   /*! \brief constructor
    *
    *	\todo(14) Implement Method
    */
   Dispatcher();
+  Thread* lifePointer[Core::MAX];
 
   /*! \brief Returns the thread currently running on the CPU core calling
    *  this method

thread/scheduler.cc

@@ -2,22 +2,47 @@
 
 #include "scheduler.h"
 
-Scheduler::Scheduler() {}
+Queue<Thread> readyList = Queue<Thread>();
+
+Scheduler::Scheduler() {
+}
 
 Thread* Scheduler::getNext() { return nullptr; }
 
-void Scheduler::schedule() {}
+void Scheduler::schedule() {
+	// TODO maybe guard?
+	Thread* next = readyList.dequeue();
+	assert(next != nullptr);
+	dispatcher.go(next);
+}
 
-void Scheduler::ready(Thread* that) { (void)that; }
+void Scheduler::ready(Thread* that) {
+	assert(that != nullptr);
+	readyList.enqueue(*that);
+}
 
-void Scheduler::resume(bool ready) { (void)ready; }
+void Scheduler::resume(bool ready) {
+	//if (!active()->kill_flag)
+	if (ready)
+        readyList.enqueue(*active());
+    Thread* thread = readyList.dequeue();
+    assert(thread != nullptr);
+    dispatcher.dispatch(thread);
+}
 
-void Scheduler::exit() {}
+void Scheduler::exit() {
+	Thread* thread = readyList.dequeue();
+    assert(thread != nullptr);
+    dispatcher.dispatch(thread);
+}
 
-void Scheduler::kill(Thread* that) { (void)that; }
+void Scheduler::kill(Thread* that) {
+    readyList.remove(that);
+    that->kill_flag = true;
+}
 
-bool Scheduler::isActive(const Thread* that, unsigned int* cpu) {
+bool Scheduler::isActive(const Thread* thread, unsigned int* cpu) {
-  (void)that;
+  (void)thread;
   (void)cpu;
   return false;
 }

thread/scheduler.h

@@ -22,19 +22,21 @@
  *  taken from the front of the queue.
  */
 class Scheduler {
-  /*! \brief a Dispatcher object, providing the low level context switching
-   *  routines.
-   */
-  Dispatcher dispatcher;
-
     /*! \brief Helper to retrieve next Thread
    * \return pointer of next thread
    */
   Thread* getNext();
 
+
  public:
   Scheduler();
 
+  /*! \brief a Dispatcher object, providing the low level context switching
+   *  routines.
+   */
+  Dispatcher dispatcher;
+
+
   /*! \brief Start scheduling
    *
    *  This method starts the scheduling by removing the first thread from
@@ -103,7 +105,7 @@ class Scheduler {
   Thread* active() { return dispatcher.active(); }
 
   /// \copydoc Dispatcher::isActive
-  bool isActive(const Thread* that, unsigned int* cpu = nullptr);
+  bool isActive(const Thread* thread, unsigned int* cpu = nullptr);
 
   /*! \brief Checks whether the ready queue is empty.
    *

thread/thread.cc

@@ -1,16 +1,43 @@
 // vim: set noet ts=4 sw=4:
 
 #include "thread.h"
-
+#include "../debug/output.h"
+#include "../arch/context.h"
+#include "interrupt/guard.h"
 // Alias to simplify stuff
 typedef void (*kickoff_t)(void*);
 
-void Thread::kickoff(Thread* object) { (void)object; }
+void Thread::kickoff(Thread* object) { 
+	Guard::leave();
+	object->action(); 
+}
+
+Thread::Thread(void* tos) { 
+	prepareContext(tos, context, (void(*)(void*)) &(kickoff), this);
+}
+
+#include "../thread/scheduler.h"
+void Thread::resume(Thread* next) {
+	Context *from;
+	Context *to;
+	
+
+	
+		from = &this->context;
+		to = &next->context;
+
+		//dispatcher.lifePointer[Core::getID()] = next;
+		DBG << "from: " << hex << from << endl;
+		DBG << "to  : " << hex << to << endl << flush;
 	
-Thread::Thread(void* tos) { (void)tos; }
+	context_switch(to, from);
 
-void Thread::resume(Thread* next) { (void)next; }
+}
 
-void Thread::go() {}
+void Thread::go() {
+	context_launch(&context);
+}
 
-void Thread::action() {}
+void Thread::action() {
+	while(1);
+}

thread/thread.h

@@ -16,12 +16,11 @@
 #include "../arch/context.h"
 #include "../object/queue.h"
 #include "../types.h"
-
 /*! \brief The Thread is an object used by the scheduler.
  *  \ingroup thread
  */
 class Thread {
- protected:
+ public:
   /*! \brief The thread's entry point.
    *
    *  For the first activation of a thread, we need a "return address"
@@ -36,13 +35,15 @@ class Thread {
    *
    *  \param object Thread to be started
    */
-  ///  \todo(14) Implement Method
   static void kickoff(Thread* object);
 
+  volatile bool kill_flag;
+  Context context;
+  Thread* queue_link;
+
  public:
   /*! \brief Marker for a dying thread
    */
-  volatile bool kill_flag;
 
   /*! \brief Constructor
    *  Initializes the context using \ref prepareContext with the given stack

user/app1/appl.cc

@@ -8,6 +8,10 @@
 #include "../../arch/core.h"
 #include "../../interrupt/guard.h"
 #include "../../debug/output.h"
+#include "../../arch/context.h"
+
+static uint8_t appl_cnt = 0;
+
 char text[] = "Ich mag\n\
 Saftige Pflaumen voller Aroma\n\
 Ich knuddel jede Oma ins Koma\n\
@@ -22,7 +26,8 @@ Und wacht sie aus'm Koma auf, kriegt sie von mir 'n Sticker\n\
 \n";
 
 extern Ticketlock koutlock;
-
+extern Context* test2; extern Context* test1;
+extern uint8_t test1_stack[], test2_stack[];
 void activeWaitDelay(uint64_t cycles) {
     uint64_t counter = 0; // Use volatile to prevent optimization
     for (uint64_t i = 0; i < cycles; ++i) {
@@ -34,23 +39,24 @@ void activeWaitDelay(uint64_t cycles) {
 
 void Application::action() {  // NOLINT
 	uint16_t cnt = 0;
+	uint8_t row = appl_cnt++;
 	while (1) {
 		//koutlock.lock();
 		{
 			Guarded g = Guard::enter();
 			//g.vault();
-		g.vault().kout.setPos((unsigned)0,(unsigned)Core::getID()*2+1);
+			g.vault().kout.setPos((unsigned)10*row,(unsigned)/*Core::getID()*2+*/1);
-		
 			g.vault().kout << cnt++ << flush;
 
 			//g.vault().kout << endl << flush;
 			//Guard::leave();
 			//koutlock.unlock();
 		}
-		Core::pause();
+		//Core::pause();
-		//activeWaitDelay(1000000000);
+		//activeWaitDelay(10000000);
+
 		if(cnt >= sizeof(text)-1)
 			cnt=0;
-
+		//context_switch(test2,test1);
 	}
 }

user/app1/appl.h

@@ -6,13 +6,13 @@
 
 #pragma once
 #include "../../types.h"
-
+#include "../../thread/thread.h"
 //! \brief Test application
 //!
 //! \todo(12) Create a test application
 //! \todo(14) Application should inherit from \ref Thread
 //! \todo(16) Make some noise using the \ref PIT::pcspeaker "PC Speaker"
-class Application {
+class Application:public Thread {
   // Prevent copies and assignments
   Application(const Application&) = delete;
   Application& operator=(const Application&) = delete;
@@ -24,7 +24,8 @@ class Application {
    *
    *  \todo(14) Implement Constructor
    */
-
+  Application(void* tos): Thread(tos){
+  }
   /*! \brief Contains the application code.
    *
    *  \todo(14) Implement Method