#include <hal_proc.h>
// === FLAGS ===
-#define DEBUG_TRACE_SWITCH 0
+#define DEBUG_TRACE_SWITCH 1
#define DEBUG_DISABLE_DOUBLEFAULT 1
#define DEBUG_VERY_SLOW_SWITCH 0
Uint8 State; // 0: Unavaliable, 1: Idle, 2: Active
Uint16 Resvd;
tThread *Current;
- tThread *IdleThread;
} tCPU;
// === IMPORTS ===
extern Uint GetEIP(void); // start.asm
extern Uint GetEIP_Sched(void); // proc.asm
extern void NewTaskHeader(tThread *Thread, void *Fcn, int nArgs, ...); // Actually takes cdecl args
-extern Uint Proc_CloneInt(Uint *ESP, Uint *CR3);
+extern Uint Proc_CloneInt(Uint *ESP, Uint32 *CR3);
extern Uint32 gaInitPageDir[1024]; // start.asm
extern char Kernel_Stack_Top[];
-extern tShortSpinlock glThreadListLock;
extern int giNumCPUs;
extern int giNextTID;
extern tThread gThreadZero;
extern void Isr8(void); // Double Fault
extern void Proc_ReturnToUser(tVAddr Handler, Uint Argument, tVAddr KernelStack);
-extern void scheduler_return; // Return address in SchedulerBase
-extern void IRQCommon; // Common IRQ handler code
-extern void IRQCommon_handled; // IRQCommon call return location
-extern void GetEIP_Sched_ret; // GetEIP call return location
-extern void Threads_AddToDelete(tThread *Thread);
+extern char scheduler_return[]; // Return address in SchedulerBase
+extern char IRQCommon[]; // Common IRQ handler code
+extern char IRQCommon_handled[]; // IRQCommon call return location
+extern char GetEIP_Sched_ret[]; // GetEIP call return location
extern void SwitchTasks(Uint NewSP, Uint *OldSP, Uint NewIP, Uint *OldIO, Uint CR3);
+extern void Proc_InitialiseSSE(void);
+extern void Proc_SaveSSE(Uint DestPtr);
+extern void Proc_DisableSSE(void);
// === PROTOTYPES ===
//void ArchThreads_Init(void);
#if USE_MP
void MP_StartAP(int CPU);
+void MP_SendIPIVector(int CPU, Uint8 Vector);
void MP_SendIPI(Uint8 APICID, int Vector, int DeliveryMode);
#endif
void Proc_IdleThread(void *Ptr);
//void Proc_Start(void);
//tThread *Proc_GetCurThread(void);
void Proc_ChangeStack(void);
- int Proc_NewKThread(void (*Fcn)(void*), void *Data);
+// int Proc_NewKThread(void (*Fcn)(void*), void *Data);
// int Proc_Clone(Uint *Err, Uint Flags);
Uint Proc_MakeUserStack(void);
//void Proc_StartUser(Uint Entrypoint, Uint *Bases, int ArgC, char **ArgV, char **EnvP, int DataSize);
int giProc_BootProcessorID = 0;
tTSS gaTSSs[MAX_CPUS]; // TSS Array
#endif
-tCPU gaCPUs[MAX_CPUS];
+tCPU gaCPUs[MAX_CPUS] = {
+ {.Current = &gThreadZero}
+ };
tTSS *gTSSs = NULL; // Pointer to TSS array
tTSS gTSS0 = {0};
// --- Error Recovery ---
outb(0x40, TIMER_DIVISOR&0xFF); // Low Byte of Divisor
outb(0x40, (TIMER_DIVISOR>>8)&0xFF); // High Byte
- Log("Timer Frequency %i.%03i Hz",
+ Log_Debug("Proc", "PIT Frequency %i.%03i Hz",
TIMER_BASE/TIMER_DIVISOR,
((Uint64)TIMER_BASE*1000/TIMER_DIVISOR)%1000
);
Log("APIC Count %i", giMP_TimerCount);
{
Uint64 freq = giMP_TimerCount;
- freq /= TIMER_DIVISOR;
freq *= TIMER_BASE;
+ freq /= TIMER_DIVISOR;
if( (freq /= 1000) < 2*1000)
Log("Bus Frequency %i KHz", freq);
else if( (freq /= 1000) < 2*1000)
{
Panic("OOM - No space for initial Per-Process Config");
}
+
+ // Initialise SSE support
+ Proc_InitialiseSSE();
// Change Stacks
Proc_ChangeStack();
}
#if USE_MP
+/**
+ * \brief Start an AP
+ */
void MP_StartAP(int CPU)
{
- Log("Starting AP %i (APIC %i)", CPU, gaCPUs[CPU].APICID);
+ Log_Log("Proc", "Starting AP %i (APIC %i)", CPU, gaCPUs[CPU].APICID);
// Set location of AP startup code and mark for a warm restart
*(Uint16*)(KERNEL_BASE|0x467) = (Uint)&APWait - (KERNEL_BASE|0xFFFF0);
giNumInitingCPUs ++;
}
+void MP_SendIPIVector(int CPU, Uint8 Vector)
+{
+ MP_SendIPI(gaCPUs[CPU].APICID, Vector, 0);
+}
+
/**
* \brief Send an Inter-Processor Interrupt
* \param APICID Processor's Local APIC ID
* \param Vector Argument of some kind
- * \param DeliveryMode Type of signal?
+ * \param DeliveryMode Type of signal
+ * \note 3A 10.5 "APIC/Handling Local Interrupts"
*/
void MP_SendIPI(Uint8 APICID, int Vector, int DeliveryMode)
{
// Hi
val = (Uint)APICID << 24;
- Log("*%p = 0x%08x", &gpMP_LocalAPIC->ICR[1], val);
+// Log("%p = 0x%08x", &gpMP_LocalAPIC->ICR[1], val);
gpMP_LocalAPIC->ICR[1].Val = val;
// Low (and send)
val = ((DeliveryMode & 7) << 8) | (Vector & 0xFF);
- Log("*%p = 0x%08x", &gpMP_LocalAPIC->ICR[0], val);
+// Log("%p = 0x%08x", &gpMP_LocalAPIC->ICR[0], val);
gpMP_LocalAPIC->ICR[0].Val = val;
}
#endif
void Proc_IdleThread(void *Ptr)
{
- tCPU *cpu = Ptr;
- cpu->IdleThread->ThreadName = strdup("Idle Thread");
- Threads_SetPriority( cpu->IdleThread, -1 ); // Never called randomly
- cpu->IdleThread->Quantum = 1; // 1 slice quantum
+ tCPU *cpu = &gaCPUs[GetCPUNum()];
+ cpu->Current->ThreadName = strdup("Idle Thread");
+ Threads_SetPriority( cpu->Current, -1 ); // Never called randomly
+ cpu->Current->Quantum = 1; // 1 slice quantum
for(;;) {
- HALT();
+ __asm__ __volatile__ ("sti"); // Make sure interrupts are enabled
+ __asm__ __volatile__ ("hlt"); // Make sure interrupts are enabled
Proc_Reschedule();
}
}
// Create Idle Task
tid = Proc_NewKThread(Proc_IdleThread, &gaCPUs[i]);
- gaCPUs[i].IdleThread = Threads_GetThread(tid);
// Start the AP
if( i != giProc_BootProcessorID ) {
gaCPUs[0].Current = &gThreadZero;
// Start interrupts and wait for APs to come up
- Log("Waiting for APs to come up\n");
+ Log_Debug("Proc", "Waiting for APs to come up");
__asm__ __volatile__ ("sti");
while( giNumInitingCPUs ) __asm__ __volatile__ ("hlt");
#else
// Create Idle Task
tid = Proc_NewKThread(Proc_IdleThread, &gaCPUs[0]);
- gaCPUs[0].IdleThread = Threads_GetThread(tid);
+// gaCPUs[0].IdleThread = Threads_GetThread(tid);
// Set current task
gaCPUs[0].Current = &gThreadZero;
-// while( gaCPUs[0].IdleThread == NULL )
-// Threads_Yield();
-
// Start Interrupts (and hence scheduler)
__asm__ __volatile__("sti");
#endif
__asm__ __volatile__ ("mov %0, %%ebp"::"r"(ebp));
}
+void Proc_ClearThread(tThread *Thread)
+{
+ Log_Warning("Proc", "TODO: Nuke address space etc");
+ if(Thread->SavedState.SSE) {
+ free(Thread->SavedState.SSE);
+ Thread->SavedState.SSE = NULL;
+ }
+}
+
int Proc_NewKThread(void (*Fcn)(void*), void *Data)
{
Uint esp;
newThread->SavedState.ESP = esp;
newThread->SavedState.EIP = (Uint)&NewTaskHeader;
- Log("New (KThread) %p, esp = %p\n", newThread->SavedState.EIP, newThread->SavedState.ESP);
+ newThread->SavedState.SSE = NULL;
+// Log("New (KThread) %p, esp = %p", newThread->SavedState.EIP, newThread->SavedState.ESP);
// MAGIC_BREAK();
Threads_AddActive(newThread);
return 0;
}
newThread->SavedState.EIP = eip;
+ newThread->SavedState.SSE = NULL;
+ newThread->SavedState.bSSEModified = 0;
// Check for errors
if( newThread->MemState.CR3 == 0 ) {
Log_Error("Proc", "Proc_Clone: MM_Clone failed");
- Threads_AddToDelete(newThread);
+ Threads_Delete(newThread);
return -1;
}
// Save core machine state
new->SavedState.ESP = new->KernelStack - sizeof(stack_contents);
- new->SavedState.EBP = 0;
new->SavedState.EIP = (Uint)NewTaskHeader;
+ new->SavedState.SSE = NULL;
+ new->SavedState.bSSEModified = 0;
// Mark as active
new->Status = THREAD_STAT_PREINIT;
return ;
}
- #if 1
tVAddr diffFromScheduler = Thread->SavedState.EIP - (tVAddr)SwitchTasks;
tVAddr diffFromClone = Thread->SavedState.EIP - (tVAddr)Proc_CloneInt;
tVAddr diffFromSpawn = Thread->SavedState.EIP - (tVAddr)NewTaskHeader;
}
if( diffFromScheduler > 0 && diffFromScheduler < 128 ) // When I last checked, GetEIP was at .+0x30
- #else
- Uint32 data[3];
- MM_ReadFromAddrSpace(Thread->MemState.CR3, Thread->SavedState.EBP, data, 12);
- if( data[1] == (Uint32)&IRQCommon + 25 )
- {
- tRegs *regs = (void *) data[2];
- Log(" oldebp = 0x%08x, ret = 0x%08x, regs = 0x%x",
- data[0], data[1], data[2]
- );
- // [EBP] = old EBP
- // [EBP+0x04] = Return Addr
- // [EBP+0x08] = Arg 1 (CPU Number)
- // [EBP+0x0C] = Arg 2 (Thread)
- // [EBP+0x10] = GS (start of tRegs)
- Log(" IRQ%i from %02x:%08x", regs->int_num regs->cs, regs->eip);
- }
- if( stack[1] == (Uint32)&scheduler_return )
- #endif
{
// Scheduled out
Log(" At %04x:%08x", Thread->SavedState.UserCS, Thread->SavedState.UserEIP);
tThread *nextthread, *curthread;
int cpu = GetCPUNum();
- // TODO: Wait for it?
+ // TODO: Wait for the lock?
if(IS_LOCKED(&glThreadListLock)) return;
curthread = Proc_GetCurThread();
nextthread = Threads_GetNextToRun(cpu, curthread);
- if(!nextthread)
- nextthread = gaCPUs[cpu].IdleThread;
if(!nextthread || nextthread == curthread)
return ;
#if DEBUG_TRACE_SWITCH
- LogF("\nSwitching to task %i, CR3 = 0x%x, EIP = %p, ESP = %p\n",
- nextthread->TID,
- nextthread->MemState.CR3,
- nextthread->SavedState.EIP,
- nextthread->SavedState.ESP
- );
+ // HACK: Ignores switches to the idle threads
+ if( nextthread->TID == 0 || nextthread->TID > giNumCPUs )
+ {
+ LogF("\nSwitching CPU %i to %p (%i %s) - CR3 = 0x%x, EIP = %p, ESP = %p\n",
+ GetCPUNum(),
+ nextthread, nextthread->TID, nextthread->ThreadName,
+ nextthread->MemState.CR3,
+ nextthread->SavedState.EIP,
+ nextthread->SavedState.ESP
+ );
+ }
#endif
// Update CPU state
gTSSs[cpu].ESP0 = nextthread->KernelStack-4;
__asm__ __volatile__("mov %0, %%db0\n\t" : : "r"(nextthread) );
+ // Save FPU/MMX/XMM/SSE state
+ if( curthread && curthread->SavedState.SSE )
+ {
+ Proc_SaveSSE( ((Uint)curthread->SavedState.SSE + 0xF) & ~0xF );
+ curthread->SavedState.bSSEModified = 0;
+ Proc_DisableSSE();
+ }
+
SwitchTasks(
nextthread->SavedState.ESP, &curthread->SavedState.ESP,
nextthread->SavedState.EIP, &curthread->SavedState.EIP,
nextthread->MemState.CR3
);
+
return ;
}
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