// === CONSTANTS ===
#define SWITCH_MAGIC 0xFFFACE55 // There is no code in this area
+// Base is 1193182
#define TIMER_DIVISOR 11931 //~100Hz
// === IMPORTS ===
extern tGDT gGDT[];
+extern void APStartup(); // 16-bit AP startup code
extern Uint GetEIP(); // start.asm
extern Uint32 gaInitPageDir[1024]; // start.asm
extern void Kernel_Stack_Top;
// === PROTOTYPES ===
void ArchThreads_Init();
+#if USE_MP
+void MP_StartAP(int CPU);
+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_Scheduler();
// === GLOBALS ===
-// --- Current State ---
-#if USE_MP
-tThread *gCurrentThread[MAX_CPUS] = {NULL};
-#else
-tThread *gCurrentThread = NULL;
-#endif
// --- Multiprocessing ---
#if USE_MP
+volatile int giNumInitingCPUs = 0;
tMPInfo *gMPFloatPtr = NULL;
+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;
#if USE_MP
tMPTable *mptable;
+ // Mark BSP as active
+ gaCPUs[0].State = 2;
+
// -- Initialise Multiprocessing
// Find MP Floating Table
// - EBDA/Last 1Kib (640KiB)
// If the MP Table Exists, parse it
if(gMPFloatPtr)
{
+ int i;
+ tMPTable_Ent *ents;
Log("gMPFloatPtr = %p", gMPFloatPtr);
Log("*gMPFloatPtr = {");
Log("\t.Sig = 0x%08x", gMPFloatPtr->Sig);
Log("\t.Checksum = 0x%02x", mptable->Checksum);
Log("\t.OEMID = '%8c'", mptable->OemID);
Log("\t.ProductID = '%8c'", mptable->ProductID);
+ Log("\t.OEMTablePtr = %p'", mptable->OEMTablePtr);
+ Log("\t.OEMTableSize = 0x%04x", mptable->OEMTableSize);
+ Log("\t.EntryCount = 0x%04x", mptable->EntryCount);
+ Log("\t.LocalAPICMemMap = 0x%08x", mptable->LocalAPICMemMap);
+ Log("\t.ExtendedTableLen = 0x%04x", mptable->ExtendedTableLen);
+ Log("\t.ExtendedTableChecksum = 0x%02x", mptable->ExtendedTableChecksum);
Log("}");
+ gpMP_LocalAPIC = (void*)MM_MapHWPage(mptable->LocalAPICMemMap, 1);
+
+ ents = mptable->Entries;
+ giNumCPUs = 0;
+
+ for( i = 0; i < mptable->EntryCount; i ++ )
+ {
+ int entSize = 0;
+ switch( ents->Type )
+ {
+ case 0: // Processor
+ entSize = 20;
+ 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);
+
+
+ if( !(ents->Proc.CPUFlags & 1) ) {
+ Log("DISABLED");
+ break;
+ }
+
+ // Check if there is too many processors
+ if(giNumCPUs >= MAX_CPUS) {
+ giNumCPUs ++; // If `giNumCPUs` > MAX_CPUS later, it will be clipped
+ break;
+ }
+
+ // Initialise CPU Info
+ gaAPIC_to_CPU[ents->Proc.APICID] = giNumCPUs;
+ gaCPUs[giNumCPUs].APICID = ents->Proc.APICID;
+ gaCPUs[giNumCPUs].State = 0;
+ giNumCPUs ++;
+
+ // Send IPI
+ if( !(ents->Proc.CPUFlags & 2) )
+ {
+ MP_StartAP( giNumCPUs-1 );
+ }
+
+ break;
+ case 1: // Bus
+ entSize = 8;
+ Log("%i: Bus", i);
+ Log("\t.ID = %i", ents->Bus.ID);
+ Log("\t.TypeString = '%6c'", ents->Bus.TypeString);
+ break;
+ case 2: // I/O APIC
+ entSize = 8;
+ Log("%i: I/O APIC", i);
+ Log("\t.ID = %i", ents->IOAPIC.ID);
+ Log("\t.Version = 0x%02x", ents->IOAPIC.Version);
+ Log("\t.Flags = 0x%02x", ents->IOAPIC.Flags);
+ Log("\t.Addr = 0x%08x", ents->IOAPIC.Addr);
+ break;
+ case 3: // I/O Interrupt Assignment
+ entSize = 8;
+ Log("%i: I/O Interrupt Assignment", i);
+ Log("\t.IntType = %i", ents->IOInt.IntType);
+ Log("\t.Flags = 0x%04x", ents->IOInt.Flags);
+ Log("\t.SourceBusID = 0x%02x", ents->IOInt.SourceBusID);
+ Log("\t.SourceBusIRQ = 0x%02x", ents->IOInt.SourceBusIRQ);
+ Log("\t.DestAPICID = 0x%02x", ents->IOInt.DestAPICID);
+ Log("\t.DestAPICIRQ = 0x%02x", ents->IOInt.DestAPICIRQ);
+ break;
+ case 4: // Local Interrupt Assignment
+ entSize = 8;
+ Log("%i: Local Interrupt Assignment", i);
+ Log("\t.IntType = %i", ents->LocalInt.IntType);
+ Log("\t.Flags = 0x%04x", ents->LocalInt.Flags);
+ Log("\t.SourceBusID = 0x%02x", ents->LocalInt.SourceBusID);
+ Log("\t.SourceBusIRQ = 0x%02x", ents->LocalInt.SourceBusIRQ);
+ Log("\t.DestLocalAPICID = 0x%02x", ents->LocalInt.DestLocalAPICID);
+ Log("\t.DestLocalAPICIRQ = 0x%02x", ents->LocalInt.DestLocalAPICIRQ);
+ break;
+ default:
+ Log("%i: Unknown (%i)", i, ents->Type);
+ break;
+ }
+ ents = (void*)( (Uint)ents + entSize );
+ }
+
+ if( giNumCPUs > MAX_CPUS ) {
+ 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");
}
else {
#else
giNumCPUs = 1;
gTSSs = &gTSS0;
+ MM_FinishVirtualInit();
#endif
// Initialise Double Fault TSS
gGDT[6+pos].BaseLow = ((Uint)(&gTSSs[pos])) & 0xFFFF;
gGDT[6+pos].BaseMid = ((Uint)(&gTSSs[pos])) >> 16;
gGDT[6+pos].BaseHi = ((Uint)(&gTSSs[pos])) >> 24;
- /*
- gGDT[6+pos].LimitLow = sizeof(tTSS);
- gGDT[6+pos].LimitHi = 0;
- gGDT[6+pos].Access = 0x89; // Type
- gGDT[6+pos].Flags = 0x4;
- */
#if USE_MP
}
for(pos=0;pos<giNumCPUs;pos++) {
#endif
#if USE_MP
- gCurrentThread[0] = &gThreadZero;
+ gaCPUs[0].Current = &gThreadZero;
#else
gCurrentThread = &gThreadZero;
#endif
Proc_ChangeStack();
}
+#if USE_MP
+void MP_StartAP(int CPU)
+{
+ Log("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|0x469) = 0xFFFF;
+ outb(0x70, 0x0F); outb(0x71, 0x0A); // Warm Reset
+ MP_SendIPI(gaCPUs[CPU].APICID, 0, 5);
+ giNumInitingCPUs ++;
+}
+
+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;
+ // Low (and send)
+ val = ((DeliveryMode & 7) << 8) | (Vector & 0xFF);
+ Log("*%p = 0x%08x", addr, val);
+ *(Uint32*)addr = val;
+}
+#endif
+
/**
* \fn void Proc_Start()
* \brief Start process scheduler
tThread *Proc_GetCurThread()
{
#if USE_MP
- return NULL;
+ return gaCPUs[ gaAPIC_to_CPU[gpMP_LocalAPIC->ID.Val&0xFF] ].Current;
#else
return gCurrentThread;
#endif
while(*Bases)
*--stack = *Bases++;
*--stack = 0; // Return Address
- delta = (Uint)stack; // Reuse delta to save SP
- *--stack = ss; //Stack Segment
- *--stack = delta; //Stack Pointer
- *--stack = 0x0202; //EFLAGS (Resvd (0x2) and IF (0x20))
- *--stack = cs; //Code Segment
- *--stack = Entrypoint; //EIP
+ Proc_StartProcess(ss, (Uint)stack, 0x202, cs, Entrypoint);
+}
+
+void Proc_StartProcess(Uint16 SS, Uint Stack, Uint Flags, Uint16 CS, Uint IP)
+{
+ Uint *stack = (void*)Stack;
+ *--stack = SS; //Stack Segment
+ *--stack = Stack; //Stack Pointer
+ *--stack = Flags; //EFLAGS (Resvd (0x2) and IF (0x20))
+ *--stack = CS; //Code Segment
+ *--stack = IP; //EIP
//PUSHAD
*--stack = 0xAAAAAAAA; // eax
*--stack = 0xCCCCCCCC; // ecx
*--stack = 0x51515151; // esi
*--stack = 0xB4B4B4B4; // ebp
//Individual PUSHs
- *--stack = ss; // ds
- *--stack = ss; // es
- *--stack = ss; // fs
- *--stack = ss; // gs
+ *--stack = SS; // ds
+ *--stack = SS; // es
+ *--stack = SS; // fs
+ *--stack = SS; // gs
__asm__ __volatile__ (
"mov %%eax,%%esp;\n\t" // Set stack pointer
// Get current thread
#if USE_MP
- thread = gCurrentThread[CPU];
+ thread = gaCPUs[CPU].Current;
#else
- curThread = gCurrentThread;
+ thread = gCurrentThread;
#endif
// Reduce remaining quantum and continue timeslice if non-zero
// Set current thread
#if USE_MP
- gCurrentThread[CPU] = thread;
+ gaCPUs[CPU].Current = thread;
#else
gCurrentThread = thread;
#endif
// Update Kernel Stack pointer
- gTSSs[CPU].ESP0 = thread->KernelStack;
+ gTSSs[CPU].ESP0 = thread->KernelStack-4;
// Set address space
#if USE_PAE
git.ucc.asn.au / tpg / acess2.git / blobdiff
UCC git Repository :: git.ucc.asn.au