* proc.c
*/
#include <acess.h>
+#include <threads.h>
#include <proc.h>
#include <desctab.h>
#include <mm_virt.h>
#if USE_MP
# include <mp.h>
#endif
+#include <hal_proc.h>
+#include <arch_int.h>
// === FLAGS ===
#define DEBUG_TRACE_SWITCH 0
+#define DEBUG_DISABLE_DOUBLEFAULT 1
+#define DEBUG_VERY_SLOW_PERIOD 0
// === CONSTANTS ===
-#define SWITCH_MAGIC 0xFFFACE55 // There is no code in this area
// Base is 1193182
-#define TIMER_DIVISOR 11931 //~100Hz
+#define TIMER_BASE 1193182
+#if DEBUG_VERY_SLOW_PERIOD
+# define TIMER_DIVISOR 1193 //~10Hz switch, with 10 quantum = 1s per thread
+#else
+# define TIMER_DIVISOR 11932 //~100Hz
+#endif
+
+// === TYPES ===
+typedef struct sCPU
+{
+ Uint8 APICID;
+ Uint8 State; // 0: Unavaliable, 1: Idle, 2: Active
+ Uint16 Resvd;
+ tThread *Current;
+} tCPU;
// === IMPORTS ===
extern tGDT gGDT[];
extern tIDT gIDT[];
-extern void APStartup(); // 16-bit AP startup code
-extern Uint GetEIP(); // start.asm
+extern void APWait(void); // 16-bit AP pause code
+extern void APStartup(void); // 16-bit AP startup code
+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, Uint32 *CR3, int bNoUserClone);
extern Uint32 gaInitPageDir[1024]; // start.asm
-extern void Kernel_Stack_Top;
-extern tSpinlock glThreadListLock;
+extern char Kernel_Stack_Top[];
extern int giNumCPUs;
extern int giNextTID;
-extern int giTotalTickets;
-extern int giNumActiveThreads;
extern tThread gThreadZero;
-extern tThread *gActiveThreads;
-extern tThread *gSleepingThreads;
-extern tThread *gDeleteThreads;
-extern tThread *Threads_GetNextToRun(int CPU);
-extern void Threads_Dump();
-extern tThread *Threads_CloneTCB(Uint *Err, Uint Flags);
-extern void Isr8(); // Double Fault
-extern void Proc_ReturnToUser();
+extern tProcess gProcessZero;
+extern void Isr8(void); // Double Fault
+extern void Proc_ReturnToUser(tVAddr Handler, Uint Argument, tVAddr KernelStack);
+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 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_Start();
-tThread *Proc_GetCurThread();
-void Proc_ChangeStack();
- int Proc_Clone(Uint *Err, Uint Flags);
-void Proc_StartProcess(Uint16 SS, Uint Stack, Uint Flags, Uint16 CS, Uint IP);
-void Proc_CallFaultHandler(tThread *Thread);
-void Proc_Scheduler();
+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_Clone(Uint *Err, Uint Flags);
+Uint Proc_MakeUserStack(void);
+//void Proc_StartUser(Uint Entrypoint, Uint *Bases, int ArgC, char **ArgV, char **EnvP, int DataSize);
+void Proc_StartProcess(Uint16 SS, Uint Stack, Uint Flags, Uint16 CS, Uint IP) NORETURN;
+ int Proc_Demote(Uint *Err, int Dest, tRegs *Regs);
+//void Proc_CallFaultHandler(tThread *Thread);
+//void Proc_DumpThreadCPUState(tThread *Thread);
+void Proc_Scheduler(int CPU);
// === GLOBALS ===
// --- Multiprocessing ---
#if USE_MP
volatile int giNumInitingCPUs = 0;
tMPInfo *gMPFloatPtr = NULL;
+volatile Uint32 giMP_TimerCount; // Start Count for Local APIC Timer
tAPIC *gpMP_LocalAPIC = NULL;
Uint8 gaAPIC_to_CPU[256] = {0};
-tCPU gaCPUs[MAX_CPUS];
-#else
-tThread *gCurrentThread = NULL;
-#endif
-#if USE_PAE
-Uint32 *gPML4s[4] = NULL;
+ int giProc_BootProcessorID = 0;
+tTSS gaTSSs[MAX_CPUS]; // TSS Array
#endif
-tTSS *gTSSs = NULL;
+tCPU gaCPUs[MAX_CPUS] = {
+ {.Current = &gThreadZero}
+ };
+tTSS *gTSSs = NULL; // Pointer to TSS array
tTSS gTSS0 = {0};
// --- Error Recovery ---
-char gaDoubleFaultStack[1024];
+char gaDoubleFaultStack[1024] __attribute__ ((section(".padata")));
tTSS gDoubleFault_TSS = {
- .ESP0 = (Uint)&gaDoubleFaultStack[1023],
+ .ESP0 = (Uint)&gaDoubleFaultStack[1024],
.SS0 = 0x10,
.CR3 = (Uint)gaInitPageDir - KERNEL_BASE,
.EIP = (Uint)Isr8,
- .ESP = (Uint)&gaDoubleFaultStack[1023],
+ .ESP = (Uint)&gaDoubleFaultStack[1024],
.CS = 0x08, .SS = 0x10,
.DS = 0x10, .ES = 0x10,
.FS = 0x10, .GS = 0x10,
// === CODE ===
/**
- * \fn void ArchThreads_Init()
+ * \fn void ArchThreads_Init(void)
* \brief Starts the process scheduler
*/
-void ArchThreads_Init()
+void ArchThreads_Init(void)
{
Uint pos = 0;
{
int i;
tMPTable_Ent *ents;
+ #if DUMP_MP_TABLE
Log("gMPFloatPtr = %p", gMPFloatPtr);
Log("*gMPFloatPtr = {");
Log("\t.Sig = 0x%08x", gMPFloatPtr->Sig);
gMPFloatPtr->Features[4]
);
Log("}");
-
+ #endif
+
mptable = (void*)( KERNEL_BASE|gMPFloatPtr->MPConfig );
+ #if DUMP_MP_TABLE
Log("mptable = %p", mptable);
Log("*mptable = {");
Log("\t.Sig = 0x%08x", mptable->Sig);
Log("\t.ExtendedTableLen = 0x%04x", mptable->ExtendedTableLen);
Log("\t.ExtendedTableChecksum = 0x%02x", mptable->ExtendedTableChecksum);
Log("}");
+ #endif
- gpMP_LocalAPIC = (void*)MM_MapHWPage(mptable->LocalAPICMemMap, 1);
+ gpMP_LocalAPIC = (void*)MM_MapHWPages(mptable->LocalAPICMemMap, 1);
ents = mptable->Entries;
giNumCPUs = 0;
{
case 0: // Processor
entSize = 20;
+ #if DUMP_MP_TABLE
Log("%i: Processor", i);
Log("\t.APICID = %i", ents->Proc.APICID);
Log("\t.APICVer = 0x%02x", ents->Proc.APICVer);
Log("\t.CPUFlags = 0x%02x", ents->Proc.CPUFlags);
Log("\t.CPUSignature = 0x%08x", ents->Proc.CPUSignature);
Log("\t.FeatureFlags = 0x%08x", ents->Proc.FeatureFlags);
-
+ #endif
if( !(ents->Proc.CPUFlags & 1) ) {
Log("DISABLED");
gaCPUs[giNumCPUs].State = 0;
giNumCPUs ++;
- // Send IPI
- if( !(ents->Proc.CPUFlags & 2) )
- {
- MP_StartAP( giNumCPUs-1 );
+ // Set BSP Variable
+ if( ents->Proc.CPUFlags & 2 ) {
+ giProc_BootProcessorID = giNumCPUs-1;
}
break;
+
+ #if DUMP_MP_TABLE >= 2
case 1: // Bus
entSize = 8;
Log("%i: Bus", i);
Log("\t.ID = %i", ents->Bus.ID);
- Log("\t.TypeString = '%6c'", ents->Bus.TypeString);
+ Log("\t.TypeString = '%6C'", ents->Bus.TypeString);
break;
case 2: // I/O APIC
entSize = 8;
default:
Log("%i: Unknown (%i)", i, ents->Type);
break;
+ #endif
}
ents = (void*)( (Uint)ents + entSize );
}
Warning("Too many CPUs detected (%i), only using %i of them", giNumCPUs, MAX_CPUS);
giNumCPUs = MAX_CPUS;
}
-
- while( giNumInitingCPUs )
- MM_FinishVirtualInit();
-
- Panic("Uh oh... MP Table Parsing is unimplemented\n");
+ gTSSs = gaTSSs;
}
else {
Log("No MP Table was found, assuming uniprocessor\n");
#else
giNumCPUs = 1;
gTSSs = &gTSS0;
- MM_FinishVirtualInit();
#endif
+ #if !DEBUG_DISABLE_DOUBLEFAULT
// Initialise Double Fault TSS
- /*
- gGDT[5].LimitLow = sizeof(tTSS);
- gGDT[5].LimitHi = 0;
- gGDT[5].Access = 0x89; // Type
- gGDT[5].Flags = 0x4;
- */
gGDT[5].BaseLow = (Uint)&gDoubleFault_TSS & 0xFFFF;
gGDT[5].BaseMid = (Uint)&gDoubleFault_TSS >> 16;
gGDT[5].BaseHi = (Uint)&gDoubleFault_TSS >> 24;
- Log_Debug("Proc", "gIDT[8] = {OffsetLo:%04x, CS:%04x, Flags:%04x, OffsetHi:%04x}",
- gIDT[8].OffsetLo, gIDT[8].CS, gIDT[8].Flags, gIDT[8].OffsetHi);
+ // Set double fault IDT to use the new TSS
gIDT[8].OffsetLo = 0;
gIDT[8].CS = 5<<3;
gIDT[8].Flags = 0x8500;
gIDT[8].OffsetHi = 0;
- Log_Debug("Proc", "gIDT[8] = {OffsetLo:%04x, CS:%04x, Flags:%04x, OffsetHi:%04x}",
- gIDT[8].OffsetLo, gIDT[8].CS, gIDT[8].Flags, gIDT[8].OffsetHi);
+ #endif
+
+ // Set timer frequency
+ outb(0x43, 0x34); // Set Channel 0, Low/High, Rate Generator
+ outb(0x40, TIMER_DIVISOR&0xFF); // Low Byte of Divisor
+ outb(0x40, (TIMER_DIVISOR>>8)&0xFF); // High Byte
- //__asm__ __volatile__ ("xchg %bx, %bx");
+ Log_Debug("Proc", "PIT Frequency %i.%03i Hz",
+ TIMER_BASE/TIMER_DIVISOR,
+ ((Uint64)TIMER_BASE*1000/TIMER_DIVISOR)%1000
+ );
#if USE_MP
+ // Get the count setting for APIC timer
+ Log("Determining APIC Count");
+ __asm__ __volatile__ ("sti");
+ while( giMP_TimerCount == 0 ) __asm__ __volatile__ ("hlt");
+ __asm__ __volatile__ ("cli");
+ Log("APIC Count %i", giMP_TimerCount);
+ {
+ Uint64 freq = giMP_TimerCount;
+ freq *= TIMER_BASE;
+ freq /= TIMER_DIVISOR;
+ if( (freq /= 1000) < 2*1000)
+ Log("Bus Frequency %i KHz", freq);
+ else if( (freq /= 1000) < 2*1000)
+ Log("Bus Frequency %i MHz", freq);
+ else if( (freq /= 1000) < 2*1000)
+ Log("Bus Frequency %i GHz", freq);
+ else
+ Log("Bus Frequency %i THz", freq);
+ }
+
// Initialise Normal TSS(s)
for(pos=0;pos<giNumCPUs;pos++)
{
gTSSs[pos].SS0 = 0x10;
gTSSs[pos].ESP0 = 0; // Set properly by scheduler
gGDT[6+pos].BaseLow = ((Uint)(&gTSSs[pos])) & 0xFFFF;
- gGDT[6+pos].BaseMid = ((Uint)(&gTSSs[pos])) >> 16;
+ gGDT[6+pos].BaseMid = ((Uint)(&gTSSs[pos]) >> 16) & 0xFFFF;
gGDT[6+pos].BaseHi = ((Uint)(&gTSSs[pos])) >> 24;
#if USE_MP
}
- for(pos=0;pos<giNumCPUs;pos++) {
- #endif
- __asm__ __volatile__ ("ltr %%ax"::"a"(0x30+pos*8));
- #if USE_MP
- }
#endif
- #if USE_MP
- gaCPUs[0].Current = &gThreadZero;
- #else
- gCurrentThread = &gThreadZero;
- #endif
+ // Load the BSP's TSS
+ __asm__ __volatile__ ("ltr %%ax"::"a"(0x30));
+ // Set Current Thread and CPU Number in DR0 and DR1
+ __asm__ __volatile__ ("mov %0, %%db0"::"r"(&gThreadZero));
+ __asm__ __volatile__ ("mov %0, %%db1"::"r"(0));
- #if USE_PAE
- gThreadZero.MemState.PDP[0] = 0;
- gThreadZero.MemState.PDP[1] = 0;
- gThreadZero.MemState.PDP[2] = 0;
- #else
- gThreadZero.MemState.CR3 = (Uint)gaInitPageDir - KERNEL_BASE;
- #endif
+ gaCPUs[0].Current = &gThreadZero;
+ gThreadZero.CurCPU = 0;
- // Set timer frequency
- outb(0x43, 0x34); // Set Channel 0, Low/High, Rate Generator
- outb(0x40, TIMER_DIVISOR&0xFF); // Low Byte of Divisor
- outb(0x40, (TIMER_DIVISOR>>8)&0xFF); // High Byte
+ gProcessZero.MemState.CR3 = (Uint)gaInitPageDir - KERNEL_BASE;
// Create Per-Process Data Block
- MM_Allocate(MM_PPD_CFG);
+ if( !MM_Allocate(MM_PPD_CFG) )
+ {
+ 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)&APStartup - (KERNEL_BASE|0xFFFF0);
+ *(Uint16*)(KERNEL_BASE|0x467) = (Uint)&APWait - (KERNEL_BASE|0xFFFF0);
*(Uint16*)(KERNEL_BASE|0x469) = 0xFFFF;
- outb(0x70, 0x0F); outb(0x71, 0x0A); // Warm Reset
- MP_SendIPI(gaCPUs[CPU].APICID, 0, 5);
+ outb(0x70, 0x0F); outb(0x71, 0x0A); // Set warm reset flag
+ MP_SendIPI(gaCPUs[CPU].APICID, 0, 5); // Init IPI
+
+ // Delay
+ inb(0x80); inb(0x80); inb(0x80); inb(0x80);
+
+ // TODO: Use a better address, preferably registered with the MM
+ // - MM_AllocDMA mabye?
+ // Create a far jump
+ *(Uint8*)(KERNEL_BASE|0x11000) = 0xEA; // Far JMP
+ *(Uint16*)(KERNEL_BASE|0x11001) = (Uint)&APStartup - (KERNEL_BASE|0xFFFF0); // IP
+ *(Uint16*)(KERNEL_BASE|0x11003) = 0xFFFF; // CS
+ // Send a Startup-IPI to make the CPU execute at 0x11000 (which we
+ // just filled)
+ MP_SendIPI(gaCPUs[CPU].APICID, 0x11, 6); // StartupIPI
+
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
+ * \note 3A 10.5 "APIC/Handling Local Interrupts"
+ */
void MP_SendIPI(Uint8 APICID, int Vector, int DeliveryMode)
{
- Uint32 addr = (Uint)gpMP_LocalAPIC + 0x300;
Uint32 val;
// Hi
val = (Uint)APICID << 24;
- Log("*%p = 0x%08x", addr+0x10, val);
- *(Uint32*)(addr+0x10) = 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", addr, val);
- *(Uint32*)addr = val;
+// Log("%p = 0x%08x", &gpMP_LocalAPIC->ICR[0], val);
+ gpMP_LocalAPIC->ICR[0].Val = val;
}
#endif
+void Proc_IdleThread(void *Ptr)
+{
+ 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(;;) {
+ __asm__ __volatile__ ("sti"); // Make sure interrupts are enabled
+ __asm__ __volatile__ ("hlt"); // Make sure interrupts are enabled
+ Proc_Reschedule();
+ }
+}
+
/**
- * \fn void Proc_Start()
+ * \fn void Proc_Start(void)
* \brief Start process scheduler
*/
-void Proc_Start()
+void Proc_Start(void)
{
+ int tid;
+ #if USE_MP
+ int i;
+ #endif
+
+ #if USE_MP
+ // Start APs
+ for( i = 0; i < giNumCPUs; i ++ )
+ {
+ if(i) gaCPUs[i].Current = NULL;
+
+ // Create Idle Task
+ tid = Proc_NewKThread(Proc_IdleThread, &gaCPUs[i]);
+
+ // Start the AP
+ if( i != giProc_BootProcessorID ) {
+ MP_StartAP( i );
+ }
+ }
+
+ // BSP still should run the current task
+ gaCPUs[0].Current = &gThreadZero;
+
+ // Start interrupts and wait for APs to come up
+ 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);
+
+ // Set current task
+ gaCPUs[0].Current = &gThreadZero;
+
// Start Interrupts (and hence scheduler)
__asm__ __volatile__("sti");
+ #endif
+ MM_FinishVirtualInit();
}
/**
- * \fn tThread *Proc_GetCurThread()
+ * \fn tThread *Proc_GetCurThread(void)
* \brief Gets the current thread
*/
-tThread *Proc_GetCurThread()
+tThread *Proc_GetCurThread(void)
{
#if USE_MP
- return gaCPUs[ gaAPIC_to_CPU[gpMP_LocalAPIC->ID.Val&0xFF] ].Current;
+ return gaCPUs[ GetCPUNum() ].Current;
#else
- return gCurrentThread;
+ return gaCPUs[ 0 ].Current;
#endif
}
/**
- * \fn void Proc_ChangeStack()
+ * \fn void Proc_ChangeStack(void)
* \brief Swaps the current stack for a new one (in the proper stack reigon)
*/
-void Proc_ChangeStack()
+void Proc_ChangeStack(void)
{
Uint esp, ebp;
Uint tmpEbp, oldEsp;
__asm__ __volatile__ ("mov %0, %%ebp"::"r"(ebp));
}
+void Proc_ClearProcess(tProcess *Process)
+{
+ MM_ClearSpace(Process->MemState.CR3);
+}
+
+void Proc_ClearThread(tThread *Thread)
+{
+ if(Thread->SavedState.SSE) {
+ free(Thread->SavedState.SSE);
+ Thread->SavedState.SSE = NULL;
+ }
+}
+
+tTID Proc_NewKThread(void (*Fcn)(void*), void *Data)
+{
+ Uint esp;
+ tThread *newThread, *cur;
+
+ cur = Proc_GetCurThread();
+ newThread = Threads_CloneTCB(0);
+ if(!newThread) return -1;
+
+ // Create new KStack
+ newThread->KernelStack = MM_NewKStack();
+ // Check for errors
+ if(newThread->KernelStack == 0) {
+ free(newThread);
+ return -1;
+ }
+
+ esp = newThread->KernelStack;
+ *(Uint*)(esp-=4) = (Uint)Data; // Data (shadowed)
+ *(Uint*)(esp-=4) = 1; // Number of params
+ *(Uint*)(esp-=4) = (Uint)Fcn; // Function to call
+ *(Uint*)(esp-=4) = (Uint)newThread; // Thread ID
+
+ newThread->SavedState.ESP = esp;
+ newThread->SavedState.EIP = (Uint)&NewTaskHeader;
+ newThread->SavedState.SSE = NULL;
+// Log("New (KThread) %p, esp = %p", newThread->SavedState.EIP, newThread->SavedState.ESP);
+
+// MAGIC_BREAK();
+ Threads_AddActive(newThread);
+
+ return newThread->TID;
+}
+
/**
* \fn int Proc_Clone(Uint *Err, Uint Flags)
* \brief Clone the current process
*/
-int Proc_Clone(Uint *Err, Uint Flags)
+tPID Proc_Clone(Uint Flags)
{
tThread *newThread;
tThread *cur = Proc_GetCurThread();
- Uint eip, esp, ebp;
-
- __asm__ __volatile__ ("mov %%esp, %0": "=r"(esp));
- __asm__ __volatile__ ("mov %%ebp, %0": "=r"(ebp));
-
- newThread = Threads_CloneTCB(Err, Flags);
- if(!newThread) return -1;
-
- // Initialise Memory Space (New Addr space or kernel stack)
- if(Flags & CLONE_VM) {
- newThread->MemState.CR3 = MM_Clone();
- newThread->KernelStack = cur->KernelStack;
- } else {
- Uint tmpEbp, oldEsp = esp;
-
- // Set CR3
- newThread->MemState.CR3 = cur->MemState.CR3;
-
- // Create new KStack
- newThread->KernelStack = MM_NewKStack();
- // Check for errors
- if(newThread->KernelStack == 0) {
- free(newThread);
- return -1;
- }
+ Uint eip;
- // Get ESP as a used size
- esp = cur->KernelStack - esp;
- // Copy used stack
- memcpy( (void*)(newThread->KernelStack - esp), (void*)(cur->KernelStack - esp), esp );
- // Get ESP as an offset in the new stack
- esp = newThread->KernelStack - esp;
- // Adjust EBP
- ebp = newThread->KernelStack - (cur->KernelStack - ebp);
-
- // Repair EBPs & Stack Addresses
- // Catches arguments also, but may trash stack-address-like values
- for(tmpEbp = esp; tmpEbp < newThread->KernelStack; tmpEbp += 4)
- {
- if(oldEsp < *(Uint*)tmpEbp && *(Uint*)tmpEbp < cur->KernelStack)
- *(Uint*)tmpEbp += newThread->KernelStack - cur->KernelStack;
- }
+ // Sanity, please
+ if( !(Flags & CLONE_VM) ) {
+ Log_Error("Proc", "Proc_Clone: Don't leave CLONE_VM unset, use Proc_NewKThread instead");
+ return -1;
}
- // Save core machine state
- newThread->SavedState.ESP = esp;
- newThread->SavedState.EBP = ebp;
- eip = GetEIP();
- if(eip == SWITCH_MAGIC) {
- outb(0x20, 0x20); // ACK Timer and return as child
+ // New thread
+ newThread = Threads_CloneTCB(Flags);
+ if(!newThread) return -1;
+
+ newThread->KernelStack = cur->KernelStack;
+
+ // Clone state
+ eip = Proc_CloneInt(&newThread->SavedState.ESP, &newThread->Process->MemState.CR3, Flags & CLONE_NOUSER);
+ if( eip == 0 ) {
return 0;
}
-
- // Set EIP as parent
newThread->SavedState.EIP = eip;
+ newThread->SavedState.SSE = NULL;
+ newThread->SavedState.bSSEModified = 0;
- // Lock list and add to active
+ // Check for errors
+ if( newThread->Process->MemState.CR3 == 0 ) {
+ Log_Error("Proc", "Proc_Clone: MM_Clone failed");
+ Threads_Delete(newThread);
+ return -1;
+ }
+
+ // Add the new thread to the run queue
Threads_AddActive(newThread);
-
return newThread->TID;
}
/**
- * \fn int Proc_SpawnWorker()
+ * \fn int Proc_SpawnWorker(void)
* \brief Spawns a new worker thread
*/
-int Proc_SpawnWorker()
+int Proc_SpawnWorker(void (*Fcn)(void*), void *Data)
{
- tThread *new, *cur;
- Uint eip, esp, ebp;
-
- cur = Proc_GetCurThread();
+ tThread *new;
+ Uint stack_contents[4];
// Create new thread
- new = malloc( sizeof(tThread) );
+ new = Threads_CloneThreadZero();
if(!new) {
Warning("Proc_SpawnWorker - Out of heap space!\n");
return -1;
}
- memcpy(new, &gThreadZero, sizeof(tThread));
- // Set Thread ID
- new->TID = giNextTID++;
- // Create a new worker stack (in PID0's address space)
- // The stack is relocated by this code
- new->KernelStack = MM_NewWorkerStack();
- // Get ESP and EBP based in the new stack
- __asm__ __volatile__ ("mov %%esp, %0": "=r"(esp));
- __asm__ __volatile__ ("mov %%ebp, %0": "=r"(ebp));
- esp = new->KernelStack - (cur->KernelStack - esp);
- ebp = new->KernelStack - (cur->KernelStack - ebp);
+ // Create the stack contents
+ stack_contents[3] = (Uint)Data;
+ stack_contents[2] = 1;
+ stack_contents[1] = (Uint)Fcn;
+ stack_contents[0] = (Uint)new;
+ // Create a new worker stack (in PID0's address space)
+ new->KernelStack = MM_NewWorkerStack(stack_contents, sizeof(stack_contents));
+
// Save core machine state
- new->SavedState.ESP = esp;
- new->SavedState.EBP = ebp;
- eip = GetEIP();
- if(eip == SWITCH_MAGIC) {
- outb(0x20, 0x20); // ACK Timer and return as child
- return 0;
- }
+ new->SavedState.ESP = new->KernelStack - sizeof(stack_contents);
+ new->SavedState.EIP = (Uint)NewTaskHeader;
+ new->SavedState.SSE = NULL;
+ new->SavedState.bSSEModified = 0;
- // Set EIP as parent
- new->SavedState.EIP = eip;
// Mark as active
- new->Status = THREAD_STAT_ACTIVE;
+ new->Status = THREAD_STAT_PREINIT;
Threads_AddActive( new );
return new->TID;
}
/**
- * \fn Uint Proc_MakeUserStack()
+ * \fn Uint Proc_MakeUserStack(void)
* \brief Creates a new user stack
*/
-Uint Proc_MakeUserStack()
+Uint Proc_MakeUserStack(void)
{
int i;
Uint base = USER_STACK_TOP - USER_STACK_SZ;
if(i != -1) return 0;
// Allocate Stack - Allocate incrementally to clean up MM_Dump output
- for( i = 0; i < USER_STACK_SZ/4069; i++ )
- MM_Allocate( base + (i<<12) );
+ for( i = 0; i < USER_STACK_SZ/0x1000; i++ )
+ {
+ if( !MM_Allocate( base + (i<<12) ) )
+ {
+ Warning("OOM: Proc_MakeUserStack");
+ return 0;
+ }
+ }
return base + USER_STACK_SZ;
}
-
-/**
- * \fn void Proc_StartUser(Uint Entrypoint, Uint *Bases, int ArgC, char **ArgV, char **EnvP, int DataSize)
- * \brief Starts a user task
- */
-void Proc_StartUser(Uint Entrypoint, Uint *Bases, int ArgC, char **ArgV, char **EnvP, int DataSize)
+void Proc_StartUser(Uint Entrypoint, Uint Base, int ArgC, const char **ArgV, int DataSize)
{
- Uint *stack = (void*)Proc_MakeUserStack();
+ Uint *stack;
int i;
- Uint delta;
+ const char **envp = NULL;
Uint16 ss, cs;
- LOG("stack = 0x%x", stack);
-
- // Copy Arguments
- stack = (void*)( (Uint)stack - DataSize );
+ // Copy data to the user stack and free original buffer
+ stack = (void*)Proc_MakeUserStack();
+ stack -= (DataSize+sizeof(*stack)-1)/sizeof(*stack);
memcpy( stack, ArgV, DataSize );
+ free(ArgV);
// Adjust Arguments and environment
- delta = (Uint)stack - (Uint)ArgV;
- ArgV = (char**)stack;
- for( i = 0; ArgV[i]; i++ ) ArgV[i] += delta;
- i ++;
- EnvP = &ArgV[i];
- for( i = 0; EnvP[i]; i++ ) EnvP[i] += delta;
+ if( DataSize )
+ {
+ Uint delta = (Uint)stack - (Uint)ArgV;
+ ArgV = (const char**)stack;
+ for( i = 0; ArgV[i]; i++ ) ArgV[i] += delta;
+ envp = &ArgV[i+1];
+ for( i = 0; envp[i]; i++ ) envp[i] += delta;
+ }
// User Mode Segments
ss = 0x23; cs = 0x1B;
// Arguments
- *--stack = (Uint)EnvP;
+ *--stack = (Uint)envp;
*--stack = (Uint)ArgV;
*--stack = (Uint)ArgC;
- while(*Bases)
- *--stack = *Bases++;
- *--stack = 0; // Return Address
+ *--stack = Base;
Proc_StartProcess(ss, (Uint)stack, 0x202, cs, Entrypoint);
}
{
// Rewinds the stack and calls the user function
// Never returns
- __asm__ __volatile__ ("mov %0, %%ebp;\n\tcall Proc_ReturnToUser" :: "r"(Thread->FaultHandler));
+ Proc_ReturnToUser( Thread->FaultHandler, Thread->CurFaultNum, Thread->KernelStack );
for(;;);
}
-/**
- * \fn void Proc_Scheduler(int CPU)
- * \brief Swap current thread and clears dead threads
- */
-void Proc_Scheduler(int CPU)
+void Proc_DumpThreadCPUState(tThread *Thread)
{
- Uint esp, ebp, eip;
- tThread *thread;
-
- // If the spinlock is set, let it complete
- if(IS_LOCKED(&glThreadListLock)) return;
-
- // Clear Delete Queue
- while(gDeleteThreads)
+ if( Thread->CurCPU > -1 )
{
- thread = gDeleteThreads->Next;
- if(gDeleteThreads->IsLocked) { // Only free if structure is unused
- gDeleteThreads->Status = THREAD_STAT_NULL;
- free( gDeleteThreads );
+ int maxBacktraceDistance = 6;
+ tRegs *regs = NULL;
+ Uint32 *stack;
+
+ if( Thread->CurCPU != GetCPUNum() ) {
+ Log(" Currently running");
+ return ;
}
- gDeleteThreads = thread;
- }
-
- // Check if there is any tasks running
- if(giNumActiveThreads == 0) {
- Log("No Active threads, sleeping");
- __asm__ __volatile__ ("hlt");
- return;
+
+ // Backtrace to find the IRQ entrypoint
+ // - This will usually only be called by an IRQ, so this should
+ // work
+ __asm__ __volatile__ ("mov %%ebp, %0" : "=r" (stack));
+ while( maxBacktraceDistance -- )
+ {
+ // [ebp] = oldEbp
+ // [ebp+4] = retaddr
+
+ if( stack[1] == (tVAddr)&IRQCommon_handled ) {
+ regs = (void*)stack[2];
+ break;
+ }
+
+ stack = (void*)stack[0];
+ }
+
+ if( !regs ) {
+ Log(" Unable to find IRQ Entry");
+ return ;
+ }
+
+ Log(" at %04x:%08x", regs->cs, regs->eip);
+ return ;
}
- // Get current thread
- #if USE_MP
- thread = gaCPUs[CPU].Current;
- #else
- thread = gCurrentThread;
- #endif
-
- // Reduce remaining quantum and continue timeslice if non-zero
- if(thread->Remaining--) return;
- // Reset quantum for next call
- thread->Remaining = thread->Quantum;
-
- // Get machine state
- __asm__ __volatile__ ("mov %%esp, %0":"=r"(esp));
- __asm__ __volatile__ ("mov %%ebp, %0":"=r"(ebp));
- eip = GetEIP();
- if(eip == SWITCH_MAGIC) return; // Check if a switch happened
+ tVAddr diffFromScheduler = Thread->SavedState.EIP - (tVAddr)SwitchTasks;
+ tVAddr diffFromClone = Thread->SavedState.EIP - (tVAddr)Proc_CloneInt;
+ tVAddr diffFromSpawn = Thread->SavedState.EIP - (tVAddr)NewTaskHeader;
- // Save machine state
- thread->SavedState.ESP = esp;
- thread->SavedState.EBP = ebp;
- thread->SavedState.EIP = eip;
+ if( diffFromClone > 0 && diffFromClone < 40 ) // When I last checked, .newTask was at .+27
+ {
+ Log(" Creating process");
+ return ;
+ }
- // Get next thread
- thread = Threads_GetNextToRun(CPU);
+ if( diffFromSpawn == 0 )
+ {
+ Log(" Creating thread");
+ return ;
+ }
- // Error Check
- if(thread == NULL) {
- Warning("Hmm... Threads_GetNextToRun returned NULL, I don't think this should happen.\n");
- return;
+ if( diffFromScheduler > 0 && diffFromScheduler < 128 ) // When I last checked, GetEIP was at .+0x30
+ {
+ // Scheduled out
+ Log(" At %04x:%08x", Thread->SavedState.UserCS, Thread->SavedState.UserEIP);
+ return ;
}
- #if DEBUG_TRACE_SWITCH
- Log("Switching to task %i, CR3 = 0x%x, EIP = %p",
- thread->TID,
- thread->MemState.CR3,
- thread->SavedState.EIP
- );
- #endif
+ Log(" Just created (unknown %p)", Thread->SavedState.EIP);
+}
+
+void Proc_Reschedule(void)
+{
+ tThread *nextthread, *curthread;
+ int cpu = GetCPUNum();
+
+ // TODO: Wait for the lock?
+ if(IS_LOCKED(&glThreadListLock)) return;
- // Set current thread
- #if USE_MP
- gaCPUs[CPU].Current = thread;
- #else
- gCurrentThread = thread;
+ curthread = Proc_GetCurThread();
+
+ nextthread = Threads_GetNextToRun(cpu, curthread);
+
+ if(!nextthread || nextthread == curthread)
+ return ;
+
+ #if DEBUG_TRACE_SWITCH
+ // 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->Process->MemState.CR3,
+ nextthread->SavedState.EIP,
+ nextthread->SavedState.ESP
+ );
+ LogF("OldCR3 = %P\n", curthread->Process->MemState.CR3);
+ }
#endif
+
+ // Update CPU state
+ gaCPUs[cpu].Current = nextthread;
+ 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();
+ }
+
+ if( curthread )
+ {
+ SwitchTasks(
+ nextthread->SavedState.ESP, &curthread->SavedState.ESP,
+ nextthread->SavedState.EIP, &curthread->SavedState.EIP,
+ nextthread->Process->MemState.CR3
+ );
+ }
+ else
+ {
+ SwitchTasks(
+ nextthread->SavedState.ESP, 0,
+ nextthread->SavedState.EIP, 0,
+ nextthread->Process->MemState.CR3
+ );
+ }
+
+ return ;
+}
+
+/**
+ * \fn void Proc_Scheduler(int CPU)
+ * \brief Swap current thread and clears dead threads
+ */
+void Proc_Scheduler(int CPU)
+{
+#if 0
+ tThread *thread;
- // Update Kernel Stack pointer
- gTSSs[CPU].ESP0 = thread->KernelStack-4;
+ // If the spinlock is set, let it complete
+ if(IS_LOCKED(&glThreadListLock)) return;
- // Set address space
- #if USE_PAE
- # error "Todo: Implement PAE Address space switching"
- #else
- __asm__ __volatile__ ("mov %0, %%cr3"::"a"(thread->MemState.CR3));
- #endif
+ // Get current thread
+ thread = gaCPUs[CPU].Current;
- #if 0
- if(thread->SavedState.ESP > 0xC0000000
- && thread->SavedState.ESP < thread->KernelStack-0x2000) {
- Log_Warning("Proc", "Possible bad ESP %p (PID %i)", thread->SavedState.ESP);
+ if( thread )
+ {
+ tRegs *regs;
+ Uint ebp;
+ // Reduce remaining quantum and continue timeslice if non-zero
+ if( thread->Remaining-- )
+ return;
+ // Reset quantum for next call
+ thread->Remaining = thread->Quantum;
+
+ // TODO: Make this more stable somehow
+ __asm__ __volatile__("mov %%ebp, %0" : "=r" (ebp));
+ regs = (tRegs*)(ebp+(2+2)*4); // EBP,Ret + CPU,CurThread
+ thread->SavedState.UserCS = regs->cs;
+ thread->SavedState.UserEIP = regs->eip;
+
+ if(thread->bInstrTrace) {
+ regs->eflags |= 0x100; // Set TF
+ Log("%p De-scheduled", thread);
+ }
+ else
+ regs->eflags &= ~0x100; // Clear TF
}
+
+ // TODO: Ack timer?
+ #if USE_MP
+ if( GetCPUNum() )
+ gpMP_LocalAPIC->EOI.Val = 0;
+ else
#endif
-
- // Switch threads
- __asm__ __volatile__ (
- "mov %1, %%esp\n\t" // Restore ESP
- "mov %2, %%ebp\n\t" // and EBP
- "jmp *%3" : : // And return to where we saved state (Proc_Clone or Proc_Scheduler)
- "a"(SWITCH_MAGIC), "b"(thread->SavedState.ESP),
- "d"(thread->SavedState.EBP), "c"(thread->SavedState.EIP)
- );
- for(;;); // Shouldn't reach here
+ outb(0x20, 0x20);
+ __asm__ __volatile__ ("sti");
+ Proc_Reschedule();
+#endif
}
// === EXPORTS ===
git.ucc.asn.au / tpg / acess2.git / blobdiff
UCC git Repository :: git.ucc.asn.au