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 void Proc_CloneInt(Uint32 *SP, Uint32 *MemPtr);
17 extern tVAddr MM_NewKStack(int bGlobal); // TODO: Move out into a header
20 void Proc_IdleThread(void *unused);
21 tTID Proc_NewKThread(void (*Fnc)(void*), void *Ptr);
24 tThread *gpCurrentThread = &gThreadZero;
25 tThread *gpIdleThread = NULL;
28 void ArchThreads_Init(void)
32 void Proc_IdleThread(void *unused)
34 Threads_SetPriority(gpIdleThread, -1);
35 Threads_SetName("Idle Thread");
38 __asm__ __volatile__ ("wfi");
46 tid = Proc_NewKThread( Proc_IdleThread, NULL );
47 gpIdleThread = Threads_GetThread(tid);
55 tThread *Proc_GetCurThread(void)
57 return gpCurrentThread;
60 void Proc_StartUser(Uint Entrypoint, Uint *Bases, int ArgC, char **ArgV, char **EnvP, int DataSize)
62 Log_Debug("Proc", "Proc_StartUser: (Entrypoint=%p, Bases=%p, ArgC=%i, ...)",
63 Entrypoint, Bases, ArgC);
66 tTID Proc_Clone(Uint Flags)
70 new = Threads_CloneTCB(Flags);
73 Log_Error("Proc", "TODO: Implement Proc_Clone");
78 tTID Proc_SpawnWorker( void (*Fnc)(void*), void *Ptr )
83 new = Threads_CloneThreadZero();
86 new->KernelStack = MM_NewKStack(1);
87 if(!new->KernelStack) {
88 // TODO: Delete thread
89 Log_Error("Proc", "Unable to allocate kernel stack");
93 sp = new->KernelStack;
95 *(Uint32*)(sp -= 4) = (Uint)Ptr;
96 *(Uint32*)(sp -= 4) = 1;
97 *(Uint32*)(sp -= 4) = (Uint)Fnc;
98 *(Uint32*)(sp -= 4) = (Uint)new;
100 new->SavedState.SP = sp;
101 new->SavedState.IP = (Uint)KernelThreadHeader;
103 Threads_AddActive(new);
108 tTID Proc_NewKThread( void (*Fnc)(void*), void *Ptr )
113 new = Threads_CloneTCB(0);
116 // TODO: Non-shared stack
117 new->KernelStack = MM_NewKStack(1);
118 if(!new->KernelStack) {
119 // TODO: Delete thread
120 Log_Error("Proc", "Unable to allocate kernel stack");
124 sp = new->KernelStack;
126 *(Uint32*)(sp -= 4) = (Uint)Ptr;
127 *(Uint32*)(sp -= 4) = 1;
128 *(Uint32*)(sp -= 4) = (Uint)Fnc;
129 *(Uint32*)(sp -= 4) = (Uint)new;
131 new->SavedState.SP = sp;
132 new->SavedState.IP = (Uint)KernelThreadHeader;
134 Threads_AddActive(new);
139 void Proc_CallFaultHandler(tThread *Thread)
144 void Proc_Reschedule(void)
148 cur = gpCurrentThread;
150 next = Threads_GetNextToRun(0, cur);
151 if(!next) next = gpIdleThread;
152 if(!next || next == cur) return;
154 Log("Switching to %p (%i %s) IP=%p SP=%p", next, next->TID, next->ThreadName, next->SavedState.IP, next->SavedState.SP);
155 Log("Requested by %p", __builtin_return_address(0));
157 gpCurrentThread = next;
158 // TODO: Change kernel stack?
161 next->SavedState.SP, &cur->SavedState.SP,
162 next->SavedState.IP, &cur->SavedState.IP,
168 void Proc_DumpThreadCPUState(tThread *Thread)