3 * - By John Hodge (thePowersGang)
6 * - ARM7 Process Switching
9 #include <threads_int.h>
13 extern tThread gThreadZero;
14 extern void SwitchTask(Uint32 NewSP, Uint32 *OldSP, Uint32 NewIP, Uint32 *OldIP, Uint32 MemPtr);
15 extern void KernelThreadHeader(void); // Actually takes args on stack
16 extern tVAddr MM_NewKStack(int bGlobal); // TODO: Move out into a header
19 void Proc_IdleThread(void *unused);
20 tTID Proc_NewKThread(void (*Fnc)(void*), void *Ptr);
23 tThread *gpCurrentThread = &gThreadZero;
24 tThread *gpIdleThread = NULL;
27 void ArchThreads_Init(void)
31 void Proc_IdleThread(void *unused)
34 __asm__ __volatile__ ("wfi");
43 tid = Proc_NewKThread( Proc_IdleThread, NULL );
44 gpIdleThread = Threads_GetThread(tid);
52 tThread *Proc_GetCurThread(void)
54 return gpCurrentThread;
57 tTID Proc_Clone(Uint Flags)
62 void Proc_StartUser(Uint Entrypoint, Uint *Bases, int ArgC, char **ArgV, char **EnvP, int DataSize)
66 tTID Proc_SpawnWorker( void (*Fnc)(void*), void *Ptr )
71 tTID Proc_NewKThread( void (*Fnc)(void*), void *Ptr )
76 new = Threads_CloneTCB(NULL, 0);
79 new->KernelStack = MM_NewKStack(1);
80 if(!new->KernelStack) {
81 // TODO: Delete thread
82 Log_Error("Proc", "Unable to allocate kernel stack");
86 sp = new->KernelStack;
88 *(Uint32*)(sp -= 4) = (Uint)new;
89 *(Uint32*)(sp -= 4) = (Uint)Fnc;
90 *(Uint32*)(sp -= 4) = 1;
91 *(Uint32*)(sp -= 4) = (Uint)Ptr;
93 new->SavedState.SP = sp;
94 new->SavedState.IP = (Uint)KernelThreadHeader;
96 Threads_AddActive(new);
101 void Proc_CallFaultHandler(tThread *Thread)
106 void Proc_Reschedule(void)
110 cur = gpCurrentThread;
112 next = Threads_GetNextToRun(0, cur);
113 if(!next) next = gpIdleThread;
114 if(!next || next == cur) return;
116 Log("Switching to %p (%i) IP=%p SP=%p", next, next->TID, next->SavedState.IP, next->SavedState.SP);
118 gpCurrentThread = next;
119 // TODO: Change kernel stack?
122 next->SavedState.SP, &cur->SavedState.SP,
123 next->SavedState.IP, &cur->SavedState.IP,
129 void Proc_DumpThreadCPUState(tThread *Thread)