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)
33 Threads_SetPriority(gpIdleThread, -1);
34 Threads_SetName("Idle Thread");
36 __asm__ __volatile__ ("wfi");
45 tid = Proc_NewKThread( Proc_IdleThread, NULL );
46 gpIdleThread = Threads_GetThread(tid);
54 tThread *Proc_GetCurThread(void)
56 return gpCurrentThread;
59 tTID Proc_Clone(Uint Flags)
64 void Proc_StartUser(Uint Entrypoint, Uint *Bases, int ArgC, char **ArgV, char **EnvP, int DataSize)
68 tTID Proc_SpawnWorker( void (*Fnc)(void*), void *Ptr )
73 new = Threads_CloneTCB(NULL, 0);
76 new->KernelStack = MM_NewKStack(1);
77 if(!new->KernelStack) {
78 // TODO: Delete thread
79 Log_Error("Proc", "Unable to allocate kernel stack");
83 sp = new->KernelStack;
85 *(Uint32*)(sp -= 4) = (Uint)Ptr;
86 *(Uint32*)(sp -= 4) = 1;
87 *(Uint32*)(sp -= 4) = (Uint)Fnc;
88 *(Uint32*)(sp -= 4) = (Uint)new;
90 new->SavedState.SP = sp;
91 new->SavedState.IP = (Uint)KernelThreadHeader;
93 Threads_AddActive(new);
98 tTID Proc_NewKThread( void (*Fnc)(void*), void *Ptr )
103 new = Threads_CloneTCB(NULL, 0);
106 // TODO: Non-shared stack
107 new->KernelStack = MM_NewKStack(1);
108 if(!new->KernelStack) {
109 // TODO: Delete thread
110 Log_Error("Proc", "Unable to allocate kernel stack");
114 sp = new->KernelStack;
116 *(Uint32*)(sp -= 4) = (Uint)Ptr;
117 *(Uint32*)(sp -= 4) = 1;
118 *(Uint32*)(sp -= 4) = (Uint)Fnc;
119 *(Uint32*)(sp -= 4) = (Uint)new;
121 new->SavedState.SP = sp;
122 new->SavedState.IP = (Uint)KernelThreadHeader;
124 Threads_AddActive(new);
129 void Proc_CallFaultHandler(tThread *Thread)
134 void Proc_Reschedule(void)
138 cur = gpCurrentThread;
140 next = Threads_GetNextToRun(0, cur);
141 if(!next) next = gpIdleThread;
142 if(!next || next == cur) return;
144 Log("Switching to %p (%i %s) IP=%p SP=%p", next, next->TID, next->ThreadName, next->SavedState.IP, next->SavedState.SP);
145 Log("Requested by %p", __builtin_return_address(0));
147 gpCurrentThread = next;
148 // TODO: Change kernel stack?
151 next->SavedState.SP, &cur->SavedState.SP,
152 next->SavedState.IP, &cur->SavedState.IP,
158 void Proc_DumpThreadCPUState(tThread *Thread)