3 * - By John Hodge (thePowersGang)
6 * - Low level thread management
23 #define DEBUG_TRACE_SWITCH 0
24 #define DEBUG_DISABLE_DOUBLEFAULT 1
25 #define DEBUG_VERY_SLOW_PERIOD 0
26 #define DEBUG_NOPREEMPT 1
31 #define TIMER_BASE 1193182
33 # define TIMER_DIVISOR 0xFFFF
34 #elif DEBUG_VERY_SLOW_PERIOD
35 # define TIMER_DIVISOR 1193 //~10Hz switch, with 10 quantum = 1s per thread
37 # define TIMER_DIVISOR 11932 //~100Hz
45 extern void APWait(void); // 16-bit AP pause code
46 extern void APStartup(void); // 16-bit AP startup code
47 extern void NewTaskHeader(tThread *Thread, void *Fcn, int nArgs, ...); // Actually takes cdecl args
48 extern Uint Proc_CloneInt(Uint *ESP, Uint32 *CR3, int bNoUserClone);
49 extern Uint32 gaInitPageDir[1024]; // start.asm
50 extern char Kernel_Stack_Top[];
52 extern tThread gThreadZero;
53 extern tProcess gProcessZero;
54 extern void Isr8(void); // Double Fault
55 extern void Proc_ReturnToUser(tVAddr Handler, Uint Argument, tVAddr KernelStack);
56 extern char scheduler_return[]; // Return address in SchedulerBase
57 extern char IRQCommon[]; // Common IRQ handler code
58 extern char IRQCommon_handled[]; // IRQCommon call return location
59 extern char GetEIP_Sched_ret[]; // GetEIP call return location
60 extern void Timer_CallTimers(void);
63 //void ArchThreads_Init(void);
65 void MP_StartAP(int CPU);
66 void MP_SendIPIVector(int CPU, Uint8 Vector);
67 void MP_SendIPI(Uint8 APICID, int Vector, int DeliveryMode);
69 void Proc_IdleThread(void *Ptr);
70 //void Proc_Start(void);
71 //tThread *Proc_GetCurThread(void);
72 void Proc_ChangeStack(void);
73 // int Proc_NewKThread(void (*Fcn)(void*), void *Data);
74 // int Proc_Clone(Uint *Err, Uint Flags);
75 Uint Proc_MakeUserStack(void);
76 //void Proc_StartUser(Uint Entrypoint, Uint *Bases, int ArgC, char **ArgV, char **EnvP, int DataSize);
77 void Proc_StartProcess(Uint16 SS, Uint Stack, Uint Flags, Uint16 CS, Uint IP) NORETURN;
78 void Proc_CallUser(Uint32 UserIP, Uint32 UserSP, const void *StackData, size_t StackDataLen);
79 //void Proc_CallFaultHandler(tThread *Thread);
80 //void Proc_DumpThreadCPUState(tThread *Thread);
81 void Proc_Scheduler(int CPU);
84 // --- Multiprocessing ---
86 volatile int giNumInitingCPUs = 0;
87 volatile Uint32 giMP_TimerCount; // Start Count for Local APIC Timer
88 tAPIC *gpMP_LocalAPIC = NULL;
89 Uint8 gaAPIC_to_CPU[256] = {0};
90 int giProc_BootProcessorID = 0;
91 tTSS gaTSSs[MAX_CPUS]; // TSS Array
93 tCPU gaCPUs[MAX_CPUS] = {
94 {.Current = &gThreadZero}
96 tTSS *gTSSs = NULL; // Pointer to TSS array
98 // --- Error Recovery ---
99 char gaDoubleFaultStack[1024] __attribute__ ((section(".padata")));
100 tTSS gDoubleFault_TSS = {
101 .ESP0 = (Uint)&gaDoubleFaultStack[1024],
103 .CR3 = (Uint)gaInitPageDir - KERNEL_BASE,
105 .ESP = (Uint)&gaDoubleFaultStack[1024],
106 .CS = 0x08, .SS = 0x10,
107 .DS = 0x10, .ES = 0x10,
108 .FS = 0x10, .GS = 0x10,
113 * \fn void ArchThreads_Init(void)
114 * \brief Starts the process scheduler
116 void ArchThreads_Init(void)
118 // Mark BSP as active
122 // -- Initialise Multiprocessing
123 const void *mpfloatptr = MPTable_LocateFloatPtr();
126 giNumCPUs = MPTable_FillCPUs(mpfloatptr, gaCPUs, MAX_CPUS, &giProc_BootProcessorID);
127 for( int i = 0; i < giNumCPUs; i ++ )
129 // TODO: Determine if there's an overlap
130 gaAPIC_to_CPU[gaCPUs[i].APICID] = i;
136 Log("No MP Table was found, assuming uniprocessor");
145 #if !DEBUG_DISABLE_DOUBLEFAULT
146 // Initialise Double Fault TSS
147 gGDT[5].BaseLow = (Uint)&gDoubleFault_TSS & 0xFFFF;
148 gGDT[5].BaseMid = (Uint)&gDoubleFault_TSS >> 16;
149 gGDT[5].BaseHi = (Uint)&gDoubleFault_TSS >> 24;
151 // Set double fault IDT to use the new TSS
152 gIDT[8].OffsetLo = 0;
154 gIDT[8].Flags = 0x8500;
155 gIDT[8].OffsetHi = 0;
158 // Set timer frequency
159 outb(0x43, 0x34); // Set Channel 0, Low/High, Rate Generator
160 outb(0x40, TIMER_DIVISOR&0xFF); // Low Byte of Divisor
161 outb(0x40, (TIMER_DIVISOR>>8)&0xFF); // High Byte
163 Log_Debug("Proc", "PIT Frequency %i.%03i Hz",
164 TIMER_BASE/TIMER_DIVISOR,
165 ((Uint64)TIMER_BASE*1000/TIMER_DIVISOR)%1000
169 // Get the count setting for APIC timer
170 Log("Determining APIC Count");
171 __asm__ __volatile__ ("sti");
172 while( giMP_TimerCount == 0 ) __asm__ __volatile__ ("hlt");
173 __asm__ __volatile__ ("cli");
174 Log("APIC Count %i", giMP_TimerCount);
176 Uint64 freq = giMP_TimerCount;
178 freq /= TIMER_DIVISOR;
179 if( (freq /= 1000) < 2*1000)
180 Log("Bus Frequency %i KHz", freq);
181 else if( (freq /= 1000) < 2*1000)
182 Log("Bus Frequency %i MHz", freq);
183 else if( (freq /= 1000) < 2*1000)
184 Log("Bus Frequency %i GHz", freq);
186 Log("Bus Frequency %i THz", freq);
189 // Initialise Normal TSS(s)
190 for(int pos=0;pos<giNumCPUs;pos++)
195 gTSSs[pos].SS0 = 0x10;
196 gTSSs[pos].ESP0 = 0; // Set properly by scheduler
197 gGDT[6+pos].BaseLow = ((Uint)(&gTSSs[pos])) & 0xFFFF;
198 gGDT[6+pos].BaseMid = ((Uint)(&gTSSs[pos]) >> 16) & 0xFFFF;
199 gGDT[6+pos].BaseHi = ((Uint)(&gTSSs[pos])) >> 24;
204 // Load the BSP's TSS
205 __asm__ __volatile__ ("ltr %%ax"::"a"(0x30));
206 // Set Current Thread and CPU Number in DR0 and DR1
207 __asm__ __volatile__ ("mov %0, %%db0"::"r"(&gThreadZero));
208 __asm__ __volatile__ ("mov %0, %%db1"::"r"(0));
210 gaCPUs[0].Current = &gThreadZero;
211 gThreadZero.CurCPU = 0;
213 gProcessZero.MemState.CR3 = (Uint)gaInitPageDir - KERNEL_BASE;
215 // Create Per-Process Data Block
216 if( MM_Allocate( (void*)MM_PPD_CFG ) == 0 )
218 Panic("OOM - No space for initial Per-Process Config");
221 // Initialise SSE support
222 Proc_InitialiseSSE();
232 void MP_StartAP(int CPU)
234 Log_Log("Proc", "Starting AP %i (APIC %i)", CPU, gaCPUs[CPU].APICID);
236 // Set location of AP startup code and mark for a warm restart
237 *(Uint16*)(KERNEL_BASE|0x467) = (Uint)&APWait - (KERNEL_BASE|0xFFFF0);
238 *(Uint16*)(KERNEL_BASE|0x469) = 0xFFFF;
239 outb(0x70, 0x0F); outb(0x71, 0x0A); // Set warm reset flag
240 MP_SendIPI(gaCPUs[CPU].APICID, 0, 5); // Init IPI
242 // Take a quick nap (20ms)
245 // TODO: Use a better address, preferably registered with the MM
246 // - MM_AllocDMA mabye?
248 *(Uint8*)(KERNEL_BASE|0x11000) = 0xEA; // Far JMP
249 *(Uint16*)(KERNEL_BASE|0x11001) = (Uint16)(tVAddr)&APStartup + 0x10; // IP
250 *(Uint16*)(KERNEL_BASE|0x11003) = 0xFFFF; // CS
254 // Send a Startup-IPI to make the CPU execute at 0x11000 (which we
256 MP_SendIPI(gaCPUs[CPU].APICID, 0x11, 6); // StartupIPI
258 tTime timeout = now() + 2;
259 while( giNumInitingCPUs && now() > timeout )
262 if( giNumInitingCPUs == 0 )
265 // First S-IPI failed, send again
266 MP_SendIPI(gaCPUs[CPU].APICID, 0x11, 6);
268 while( giNumInitingCPUs && now() > timeout )
270 if( giNumInitingCPUs == 0 )
273 Log_Notice("Proc", "CPU %i (APIC %x) didn't come up", CPU, gaCPUs[CPU].APICID);
276 giNumInitingCPUs = 0;
279 void MP_SendIPIVector(int CPU, Uint8 Vector)
281 MP_SendIPI(gaCPUs[CPU].APICID, Vector, 0);
285 * \brief Send an Inter-Processor Interrupt
286 * \param APICID Processor's Local APIC ID
287 * \param Vector Argument of some kind
288 * \param DeliveryMode Type of signal
289 * \note 3A 10.5 "APIC/Handling Local Interrupts"
291 void MP_SendIPI(Uint8 APICID, int Vector, int DeliveryMode)
296 val = (Uint)APICID << 24;
297 gpMP_LocalAPIC->ICR[1].Val = val;
299 val = ((DeliveryMode & 7) << 8) | (Vector & 0xFF);
300 gpMP_LocalAPIC->ICR[0].Val = val;
304 void Proc_IdleThread(void *Ptr)
306 tCPU *cpu = &gaCPUs[GetCPUNum()];
307 cpu->Current->ThreadName = strdup("Idle Thread");
308 Threads_SetPriority( cpu->Current, -1 ); // Never called randomly
309 cpu->Current->Quantum = 1; // 1 slice quantum
311 __asm__ __volatile__ ("sti"); // Make sure interrupts are enabled
312 __asm__ __volatile__ ("hlt");
318 * \fn void Proc_Start(void)
319 * \brief Start process scheduler
321 void Proc_Start(void)
324 // BSP still should run the current task
325 gaCPUs[giProc_BootProcessorID].Current = &gThreadZero;
327 __asm__ __volatile__ ("sti");
330 for( int i = 0; i < giNumCPUs; i ++ )
332 if(i != giProc_BootProcessorID)
333 gaCPUs[i].Current = NULL;
336 Proc_NewKThread(Proc_IdleThread, &gaCPUs[i]);
339 if( i != giProc_BootProcessorID ) {
345 Proc_NewKThread(Proc_IdleThread, &gaCPUs[0]);
348 gaCPUs[0].Current = &gThreadZero;
350 // Start Interrupts (and hence scheduler)
351 __asm__ __volatile__("sti");
353 MM_FinishVirtualInit();
357 * \fn tThread *Proc_GetCurThread(void)
358 * \brief Gets the current thread
360 tThread *Proc_GetCurThread(void)
363 return gaCPUs[ GetCPUNum() ].Current;
365 return gaCPUs[ 0 ].Current;
370 * \fn void Proc_ChangeStack(void)
371 * \brief Swaps the current stack for a new one (in the proper stack reigon)
373 void Proc_ChangeStack(void)
377 Uint curBase, newBase;
379 __asm__ __volatile__ ("mov %%esp, %0":"=r"(esp));
380 __asm__ __volatile__ ("mov %%ebp, %0":"=r"(ebp));
385 newBase = MM_NewKStack();
388 Panic("What the?? Unable to allocate space for initial kernel stack");
392 curBase = (Uint)&Kernel_Stack_Top;
394 LOG("curBase = 0x%x, newBase = 0x%x", curBase, newBase);
396 // Get ESP as a used size
398 LOG("memcpy( %p, %p, 0x%x )", (void*)(newBase - esp), (void*)(curBase - esp), esp );
400 memcpy( (void*)(newBase - esp), (void*)(curBase - esp), esp );
401 // Get ESP as an offset in the new stack
404 ebp = newBase - (curBase - ebp);
406 // Repair EBPs & Stack Addresses
407 // Catches arguments also, but may trash stack-address-like values
408 for(tmpEbp = esp; tmpEbp < newBase; tmpEbp += 4)
410 if(oldEsp < *(Uint*)tmpEbp && *(Uint*)tmpEbp < curBase)
411 *(Uint*)tmpEbp += newBase - curBase;
414 Proc_GetCurThread()->KernelStack = newBase;
416 __asm__ __volatile__ ("mov %0, %%esp"::"r"(esp));
417 __asm__ __volatile__ ("mov %0, %%ebp"::"r"(ebp));
420 void Proc_ClearProcess(tProcess *Process)
422 MM_ClearSpace(Process->MemState.CR3);
425 void Proc_ClearThread(tThread *Thread)
427 if(Thread->SavedState.SSE) {
428 free(Thread->SavedState.SSE);
429 Thread->SavedState.SSE = NULL;
433 tTID Proc_NewKThread(void (*Fcn)(void*), void *Data)
438 newThread = Threads_CloneTCB(0);
439 if(!newThread) return -1;
442 newThread->KernelStack = MM_NewKStack();
444 if(newThread->KernelStack == 0) {
449 esp = newThread->KernelStack;
450 *(Uint*)(esp-=4) = (Uint)Data; // Data (shadowed)
451 *(Uint*)(esp-=4) = 1; // Number of params
452 *(Uint*)(esp-=4) = (Uint)Fcn; // Function to call
453 *(Uint*)(esp-=4) = (Uint)newThread; // Thread ID
455 newThread->SavedState.ESP = esp;
456 newThread->SavedState.EIP = (Uint)&NewTaskHeader;
457 newThread->SavedState.SSE = NULL;
458 // Log("New (KThread) %p, esp = %p", newThread->SavedState.EIP, newThread->SavedState.ESP);
461 Threads_AddActive(newThread);
463 return newThread->TID;
467 tPID Proc_NewProcess(Uint Flags, void (*Fcn)(void*), size_t SaveSize, const void *Data)
469 tThread *newThread = Threads_CloneTCB(CLONE_VM);
475 * \fn int Proc_Clone(Uint *Err, Uint Flags)
476 * \brief Clone the current process
478 tPID Proc_Clone(Uint Flags)
481 tThread *cur = Proc_GetCurThread();
484 Log_Warning("Proc", "Proc_Clone is deprecated");
486 if( !(Flags & CLONE_VM) ) {
487 Log_Error("Proc", "Proc_Clone: Don't leave CLONE_VM unset, use Proc_NewKThread instead");
492 newThread = Threads_CloneTCB(Flags);
493 if(!newThread) return -1;
494 ASSERT(newThread->Process);
495 //ASSERT(CheckMem(newThread->Process, sizeof(tProcess)));
496 //LOG("newThread->Process = %p", newThread->Process);
498 newThread->KernelStack = cur->KernelStack;
501 eip = Proc_CloneInt(&newThread->SavedState.ESP, &newThread->Process->MemState.CR3, Flags & CLONE_NOUSER);
505 //ASSERT(newThread->Process);
506 //ASSERT(CheckMem(newThread->Process, sizeof(tProcess)));
507 //LOG("newThread->Process = %p", newThread->Process);
508 newThread->SavedState.EIP = eip;
509 newThread->SavedState.SSE = NULL;
510 newThread->SavedState.bSSEModified = 0;
513 if( newThread->Process->MemState.CR3 == 0 ) {
514 Log_Error("Proc", "Proc_Clone: MM_Clone failed");
515 Threads_Delete(newThread);
519 // Add the new thread to the run queue
520 Threads_AddActive(newThread);
521 return newThread->TID;
525 * \fn int Proc_SpawnWorker(void)
526 * \brief Spawns a new worker thread
528 tThread *Proc_SpawnWorker(void (*Fcn)(void*), void *Data)
530 Uint stack_contents[4];
531 LOG("(Fcn=%p,Data=%p)", Fcn, Data);
534 tThread *new = Threads_CloneThreadZero();
537 Warning("Proc_SpawnWorker - Out of heap space!\n");
541 // Create the stack contents
542 stack_contents[3] = (Uint)Data;
543 stack_contents[2] = 1;
544 stack_contents[1] = (Uint)Fcn;
545 stack_contents[0] = (Uint)new;
547 // Create a new worker stack (in PID0's address space)
548 new->KernelStack = MM_NewWorkerStack(stack_contents, sizeof(stack_contents));
549 LOG("new->KernelStack = %p", new->KernelStack);
551 // Save core machine state
552 new->SavedState.ESP = new->KernelStack - sizeof(stack_contents);
553 new->SavedState.EIP = (Uint)NewTaskHeader;
554 new->SavedState.SSE = NULL;
555 new->SavedState.bSSEModified = 0;
558 new->Status = THREAD_STAT_PREINIT;
559 Threads_AddActive( new );
560 LOG("Added to active");
566 * \fn Uint Proc_MakeUserStack(void)
567 * \brief Creates a new user stack
569 Uint Proc_MakeUserStack(void)
571 tPage *base = (void*)(USER_STACK_TOP - USER_STACK_SZ);
573 // Check Prospective Space
574 for( Uint i = USER_STACK_SZ/PAGE_SIZE; i--; )
576 if( MM_GetPhysAddr( base + i ) != 0 )
578 Warning("Proc_MakeUserStack: Address %p in use", base + i);
582 // Allocate Stack - Allocate incrementally to clean up MM_Dump output
583 for( Uint i = 0; i < USER_STACK_SZ/PAGE_SIZE; i++ )
585 if( MM_Allocate( base + i ) == 0 )
587 Warning("OOM: Proc_MakeUserStack");
592 return (tVAddr)( base + USER_STACK_SZ/PAGE_SIZE );
595 void Proc_StartUser(Uint Entrypoint, Uint Base, int ArgC, const char **ArgV, int DataSize)
599 const char **envp = NULL;
602 // Copy data to the user stack and free original buffer
603 stack = (void*)Proc_MakeUserStack();
604 stack -= (DataSize+sizeof(*stack)-1)/sizeof(*stack);
605 memcpy( stack, ArgV, DataSize );
608 // Adjust Arguments and environment
611 Uint delta = (Uint)stack - (Uint)ArgV;
612 ArgV = (const char**)stack;
613 for( i = 0; ArgV[i]; i++ ) ArgV[i] += delta;
615 for( i = 0; envp[i]; i++ ) envp[i] += delta;
618 // User Mode Segments
619 ss = 0x23; cs = 0x1B;
622 *--stack = (Uint)envp;
623 *--stack = (Uint)ArgV;
624 *--stack = (Uint)ArgC;
627 Proc_StartProcess(ss, (Uint)stack, 0x202, cs, Entrypoint);
630 void Proc_StartProcess(Uint16 SS, Uint Stack, Uint Flags, Uint16 CS, Uint IP)
632 Uint *stack = (void*)Stack;
633 *--stack = SS; //Stack Segment
634 *--stack = Stack; //Stack Pointer
635 *--stack = Flags; //EFLAGS (Resvd (0x2) and IF (0x20))
636 *--stack = CS; //Code Segment
639 *--stack = 0xAAAAAAAA; // eax
640 *--stack = 0xCCCCCCCC; // ecx
641 *--stack = 0xDDDDDDDD; // edx
642 *--stack = 0xBBBBBBBB; // ebx
643 *--stack = 0xD1D1D1D1; // edi
644 *--stack = 0x54545454; // esp - NOT POPED
645 *--stack = 0x51515151; // esi
646 *--stack = 0xB4B4B4B4; // ebp
653 __asm__ __volatile__ (
654 "mov %%eax,%%esp;\n\t" // Set stack pointer
660 "iret;\n\t" : : "a" (stack));
664 void Proc_CallUser(Uint32 UserIP, Uint32 UserSP, const void *StackData, size_t StackDataLen)
666 if( UserSP < StackDataLen )
668 if( !CheckMem( (void*)(UserSP - StackDataLen), StackDataLen ) )
670 memcpy( (void*)(UserSP - StackDataLen), StackData, StackDataLen );
672 __asm__ __volatile__ (
673 "mov $0x23,%%ax;\n\t"
674 "mov %%ax, %%ds;\n\t"
675 "mov %%ax, %%es;\n\t"
676 "mov %%ax, %%fs;\n\t"
677 "mov %%ax, %%gs;\n\t"
685 : "r" (UserIP), "r" (UserSP - StackDataLen)
693 * \brief Calls a signal handler in user mode
694 * \note Used for signals
696 void Proc_CallFaultHandler(tThread *Thread)
698 // Rewinds the stack and calls the user function
700 Proc_ReturnToUser( Thread->FaultHandler, Thread->CurFaultNum, Thread->KernelStack );
704 void Proc_DumpThreadCPUState(tThread *Thread)
706 if( Thread->CurCPU > -1 )
708 int maxBacktraceDistance = 6;
712 if( Thread->CurCPU != GetCPUNum() ) {
713 Log(" Currently running");
717 // Backtrace to find the IRQ entrypoint
718 // - This will usually only be called by an IRQ, so this should
720 __asm__ __volatile__ ("mov %%ebp, %0" : "=r" (stack));
721 while( maxBacktraceDistance -- )
723 if( !CheckMem(stack, 8) ) {
730 if( stack[1] == (tVAddr)&IRQCommon_handled ) {
731 regs = (void*)stack[2];
735 stack = (void*)stack[0];
739 Log(" Unable to find IRQ Entry");
743 Log(" at %04x:%08x [EAX:%x]", regs->cs, regs->eip, regs->eax);
744 Error_Backtrace(regs->eip, regs->ebp);
748 Log(" Saved = %p (SP=%p)", Thread->SavedState.EIP, Thread->SavedState.ESP);
750 tVAddr diffFromScheduler = Thread->SavedState.EIP - (tVAddr)SwitchTasks;
751 tVAddr diffFromClone = Thread->SavedState.EIP - (tVAddr)Proc_CloneInt;
752 tVAddr diffFromSpawn = Thread->SavedState.EIP - (tVAddr)NewTaskHeader;
754 if( diffFromClone > 0 && diffFromClone < 40 ) // When I last checked, .newTask was at .+27
756 Log(" Creating process");
760 if( diffFromSpawn == 0 )
762 Log(" Creating thread");
766 if( diffFromScheduler > 0 && diffFromScheduler < 128 ) // When I last checked, GetEIP was at .+0x30
769 Log(" At %04x:%08x", Thread->SavedState.UserCS, Thread->SavedState.UserEIP);
773 Log(" Just created (unknown %p)", Thread->SavedState.EIP);
776 void Proc_Reschedule(void)
778 tThread *nextthread, *curthread;
779 int cpu = GetCPUNum();
781 // TODO: Wait for the lock?
782 if(IS_LOCKED(&glThreadListLock)) return;
784 curthread = Proc_GetCurThread();
786 nextthread = Threads_GetNextToRun(cpu, curthread);
788 if(!nextthread || nextthread == curthread)
791 #if DEBUG_TRACE_SWITCH
792 // HACK: Ignores switches to the idle threads
793 if( nextthread->TID == 0 || nextthread->TID > giNumCPUs )
795 LogF("\nSwitching CPU %i to %p (%i %s) - CR3 = 0x%x, EIP = %p, ESP = %p\n",
797 nextthread, nextthread->TID, nextthread->ThreadName,
798 nextthread->Process->MemState.CR3,
799 nextthread->SavedState.EIP,
800 nextthread->SavedState.ESP
802 LogF("OldCR3 = %P\n", curthread->Process->MemState.CR3);
807 gaCPUs[cpu].Current = nextthread;
808 gaCPUs[cpu].LastTimerThread = NULL;
809 gTSSs[cpu].ESP0 = nextthread->KernelStack-4;
810 __asm__ __volatile__("mov %0, %%db0\n\t" : : "r"(nextthread) );
812 // Save FPU/MMX/XMM/SSE state
813 if( curthread && curthread->SavedState.SSE )
815 Proc_SaveSSE( ((Uint)curthread->SavedState.SSE + 0xF) & ~0xF );
816 curthread->SavedState.bSSEModified = 0;
823 nextthread->SavedState.ESP, &curthread->SavedState.ESP,
824 nextthread->SavedState.EIP, &curthread->SavedState.EIP,
825 nextthread->Process->MemState.CR3
831 nextthread->SavedState.ESP, 0,
832 nextthread->SavedState.EIP, 0,
833 nextthread->Process->MemState.CR3
841 * \fn void Proc_Scheduler(int CPU)
842 * \brief Swap current thread and clears dead threads
844 void Proc_Scheduler(int CPU)
848 gpMP_LocalAPIC->EOI.Val = 0;
852 __asm__ __volatile__ ("sti");
854 // Call the timer update code
858 // If two ticks happen within the same task, and it's not an idle task, swap
859 if( gaCPUs[CPU].Current->TID > giNumCPUs && gaCPUs[CPU].Current == gaCPUs[CPU].LastTimerThread )
864 gaCPUs[CPU].LastTimerThread = gaCPUs[CPU].Current;
869 EXPORT(Proc_SpawnWorker);