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kernel.c
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// Copyright (c) 2019-2021 Dennis van der Boon
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
#pragma pack(push,2)
#include <proto/powerpc.h>
#include <powerpc/powerpc.h>
#include "constants.h"
#include "libstructs.h"
#include "Internalsppc.h"
#pragma pack(pop)
/********************************************************************************************
*
* Entry point after kernel.s. This directs to the correct exception code.
*
*********************************************************************************************/
PPCKERNEL void Exception_Entry(__reg("r3") struct PrivatePPCBase* PowerPCBase, __reg("r4") struct iframe* iframe)
{
PowerPCBase->pp_ExceptionMode = -1;
PowerPCBase->pp_Quantum = PowerPCBase->pp_StdQuantum;
PowerPCBase->pp_CPUSDR1 = getSDR1();
PowerPCBase->pp_CPUHID0 = getHID0();
if ((PowerPCBase->pp_DeviceID != DEVICE_MPC8343E) && (PowerPCBase->pp_DeviceID != DEVICE_MPC8314E))
{
PowerPCBase->pp_L2State = getL2State();
}
ULONG ExceptionVector = iframe->if_Context.ec_ExcID - (PPC_VECLEN * OPCODE_LEN);
iframe->if_ExcNum = ExceptionVector >> 8;
iframe->if_Context.ec_ExcID = 1 << iframe->if_ExcNum;
switch (ExceptionVector)
{
case VEC_EXTERNAL:
{
switch (PowerPCBase->pp_DeviceID)
{
case DEVICE_HARRIER:
{
if (readmemLongPPC(PPC_XCSR_BASE, XCSR_FEST) & XCSR_FEST_MIM0)
{
writememLongPPC(PPC_XCSR_BASE, XCSR_FECL, XCSR_FECL_MIM0);
CommonExcHandler(PowerPCBase, iframe, (struct List*)&PowerPCBase->pp_ExcInterrupt);
}
if (readmemLongPPC(PowerPCBase->pp_BridgeMPIC, XMPI_P0IAC) == 0xff)
{
PowerPCBase->pp_ExceptionMode = 0;
setDEC(PowerPCBase->pp_Quantum);
return;
}
struct MsgFrame* msgFrame;
while (msgFrame = KGetMsgFramePPC(PowerPCBase))
{
AddTailPPC((struct List*)&PowerPCBase->pp_MsgQueue , (struct Node*)msgFrame);
}
writememLongPPC(PowerPCBase->pp_BridgeMPIC, XMPI_P0EOI, 0);
break;
}
case DEVICE_MPC8343E:
case DEVICE_MPC8314E:
{
if (loadPCI(IMMR_ADDR_DEFAULT, IMMR_IMISR) & IMMR_IMISR_IDI)
{
storePCI(IMMR_ADDR_DEFAULT, IMMR_IDR, 1);
CommonExcHandler(PowerPCBase, iframe, (struct List*)&PowerPCBase->pp_ExcInterrupt);
}
struct MsgFrame* msgFrame;
while (msgFrame = KGetMsgFramePPC(PowerPCBase))
{
AddTailPPC((struct List*)&PowerPCBase->pp_MsgQueue, (struct Node*)msgFrame);
}
if (loadPCI(IMMR_ADDR_DEFAULT, IMMR_IMISR) & IMMR_IMISR_IM0I)
{
storePCI(IMMR_ADDR_DEFAULT, IMMR_IMISR, IMMR_IMISR_IM0I);
}
break;
}
case DEVICE_MPC107:
{
if (loadPCI(PPC_EUMB_BASE, MPC107_IMISR) & MPC107_IMISR_IM0I)
{
storePCI(PPC_EUMB_BASE, MPC107_IMISR, (MPC107_IMISR_IM0I | MPC107_IMISR_IM1I));
CommonExcHandler(PowerPCBase, iframe, (struct List*)&PowerPCBase->pp_ExcInterrupt);
}
if ((readmemLongPPC(PPC_EUMB_EPICPROC, EPIC_IACK) >> 24) == 0xff)
{
PowerPCBase->pp_ExceptionMode = 0;
setDEC(PowerPCBase->pp_Quantum);
return;
}
struct MsgFrame* msgFrame;
while (msgFrame = KGetMsgFramePPC(PowerPCBase))
{
AddTailPPC((struct List*)&PowerPCBase->pp_MsgQueue, (struct Node*)msgFrame);
}
storePCI(PPC_EUMB_BASE, MPC107_IMISR, MPC107_IMISR_IPQI);
writememLongPPC(PPC_EUMB_EPICPROC, EPIC_EOI, 0);
break;
}
}
CPUStats(PowerPCBase);
ULONG currAddress = iframe->if_Context.ec_UPC.ec_SRR0;
if ((PowerPCBase->pp_LowerLimit <= currAddress) && (currAddress < PowerPCBase->pp_UpperLimit))
{
PowerPCBase->pp_Quantum = 0x1000;
break;
}
if ((PowerPCBase->pp_Mutex) || (PowerPCBase->pp_FlagForbid))
{
PowerPCBase->pp_Quantum = 0x1000;
break;
}
struct TaskPPC* currTask = PowerPCBase->pp_ThisPPCProc;
if (currTask)
{
if (currTask->tp_Task.tc_State == TS_ATOMIC)
{
break;
}
}
HandleMsgs(PowerPCBase);
TaskCheck(PowerPCBase);
SwitchPPC(PowerPCBase, iframe);
break;
}
case VEC_DECREMENTER:
{
CommonExcHandler(PowerPCBase, iframe, (struct List*)&PowerPCBase->pp_ExcDecrementer);
struct ExcData* eData;
while (eData = (struct ExcData*)RemHeadPPC((struct List*)&PowerPCBase->pp_ReadyExc))
{
if (eData->ed_ExcID & EXCF_MCHECK)
EnqueuePPC((struct List*)&PowerPCBase->pp_ExcMCheck, (struct Node*)eData);
if (eData->ed_ExcID & EXCF_DACCESS)
EnqueuePPC((struct List*)&PowerPCBase->pp_ExcDAccess, (struct Node*)eData);
if (eData->ed_ExcID & EXCF_IACCESS)
EnqueuePPC((struct List*)&PowerPCBase->pp_ExcIAccess, (struct Node*)eData);
if (eData->ed_ExcID & EXCF_INTERRUPT)
EnqueuePPC((struct List*)&PowerPCBase->pp_ExcInterrupt, (struct Node*)eData);
if (eData->ed_ExcID & EXCF_ALIGN)
EnqueuePPC((struct List*)&PowerPCBase->pp_ExcAlign, (struct Node*)eData);
if (eData->ed_ExcID & EXCF_PROGRAM)
EnqueuePPC((struct List*)&PowerPCBase->pp_ExcProgram, (struct Node*)eData);
if (eData->ed_ExcID & EXCF_FPUN)
EnqueuePPC((struct List*)&PowerPCBase->pp_ExcFPUn, (struct Node*)eData);
if (eData->ed_ExcID & EXCF_DECREMENTER)
EnqueuePPC((struct List*)&PowerPCBase->pp_ExcDecrementer, (struct Node*)eData);
if (eData->ed_ExcID & EXCF_SC)
EnqueuePPC((struct List*)&PowerPCBase->pp_ExcSystemCall, (struct Node*)eData);
if (eData->ed_ExcID & EXCF_TRACE)
EnqueuePPC((struct List*)&PowerPCBase->pp_ExcTrace, (struct Node*)eData);
if (eData->ed_ExcID & EXCF_PERFMON)
EnqueuePPC((struct List*)&PowerPCBase->pp_ExcPerfMon, (struct Node*)eData);
if (eData->ed_ExcID & EXCF_IABR)
EnqueuePPC((struct List*)&PowerPCBase->pp_ExcIABR, (struct Node*)eData);
eData->ed_Flags |= EXCF_ACTIVE;
}
while (eData = (struct ExcData*)RemHeadPPC((struct List*)&PowerPCBase->pp_RemovedExc))
{
ULONG nodeAddr = (ULONG)&eData->ed_LastExc;
for (int i=0; i<12; i++)
{
nodeAddr += 4;
ULONG actNode = *((ULONG*)(nodeAddr));
if (actNode)
{
RemovePPC((struct Node*)actNode);
}
}
struct ExcData* lastExc = eData->ed_LastExc;
lastExc->ed_Flags &= ~EXCF_ACTIVE;
}
CPUStats(PowerPCBase);
ULONG currAddress = iframe->if_Context.ec_UPC.ec_SRR0;
if ((PowerPCBase->pp_LowerLimit <= currAddress) && (currAddress < PowerPCBase->pp_UpperLimit))
{
PowerPCBase->pp_Quantum = 0x1000;
break;
}
if ((PowerPCBase->pp_Mutex) || (PowerPCBase->pp_FlagForbid))
{
PowerPCBase->pp_Quantum = 0x1000;
break;
}
struct TaskPPC* currTask = PowerPCBase->pp_ThisPPCProc;
if (currTask)
{
if (currTask->tp_Task.tc_State == TS_ATOMIC)
{
break;
}
}
HandleMsgs(PowerPCBase);
TaskCheck(PowerPCBase);
SwitchPPC(PowerPCBase, iframe);
break;
}
case VEC_DATASTORAGE:
{
if (PowerPCBase->pp_EnDAccessExc) //not standard WOS behaviour
{
CommonExcHandler(PowerPCBase, iframe, (struct List*)&PowerPCBase->pp_ExcDAccess);
}
if ((iframe->if_Context.ec_DAR == 4) || ((iframe->if_Context.ec_DAR < 0xfffff800) && (iframe->if_Context.ec_DAR > 0x800)))
{
if (iframe->if_Context.ec_UPC.ec_SRR0 > 0x10000)
{
if(!(PowerPCBase->pp_DataExcLow += 1))
{
PowerPCBase->pp_DataExcHigh += 1;
}
struct DataMsg myData;
ULONG Status = DoDataStore(iframe, iframe->if_Context.ec_UPC.ec_SRR0, &myData);
if (Status)
{
struct MsgFrame* myFrame = KCreateMsgFramePPC(PowerPCBase);
myFrame->mf_Identifier = myData.dm_Type;
myFrame->mf_Arg[1] = myData.dm_Address;
myFrame->mf_Arg[0] = myData.dm_Value;
KSendMsgFramePPC(PowerPCBase, myFrame);
if (!(myData.dm_LoadFlag))
{
while (myFrame->mf_Identifier != ID_DONE);
#ifdef DEBUG
if (myFrame->mf_Arg[0] == ERR_EMEM)
{
CommonExcError(PowerPCBase, iframe);
break;
}
#endif
if (!(FinDataStore(myFrame->mf_Arg[0], iframe, iframe->if_Context.ec_UPC.ec_SRR0, &myData)))
{
CommonExcError(PowerPCBase, iframe);
break;
}
}
iframe->if_Context.ec_UPC.ec_SRR0 += 4;
//PowerPCBase->pp_Quantum = getDEC() + 1000; //Do not start quantum all over
break;
}
}
}
CommonExcError(PowerPCBase, iframe);
break;
}
case VEC_PROGRAM:
{
if (iframe->if_Context.ec_GPR[4] == SUPERKEY)
{
iframe->if_Context.ec_UPC.ec_SRR0 += 4;
iframe->if_Context.ec_SRR1 &= ~PSL_PR;
iframe->if_Context.ec_GPR[3] = 0; //Set SuperKey
//PowerPCBase->pp_Quantum = getDEC() + 1000;
}
else
{
CommonExcHandler(PowerPCBase, iframe, (struct List*)&PowerPCBase->pp_ExcProgram);
}
break;
}
case VEC_ALIGNMENT:
{
if ((PowerPCBase->pp_EnAlignExc) || (iframe->if_Context.ec_DAR < 0x200000))
{
CommonExcHandler(PowerPCBase, iframe, (struct List*)&PowerPCBase->pp_ExcAlign);
}
else
{
if (DoAlign(iframe, iframe->if_Context.ec_UPC.ec_SRR0))
{
iframe->if_Context.ec_UPC.ec_SRR0 += 4;
if (!(PowerPCBase->pp_AlignmentExcLow += 1))
{
PowerPCBase->pp_AlignmentExcHigh += 1;
}
//PowerPCBase->pp_Quantum = getDEC() + 1000;
}
else
{
CommonExcHandler(PowerPCBase, iframe, (struct List*)&PowerPCBase->pp_ExcAlign);
}
}
break;
}
case VEC_ALTIVECUNAV:
{
iframe->if_Context.ec_ExcID = EXCF_ALTIVECUNAV;
iframe->if_ExcNum = EXCB_ALTIVECUNAV;
if (PowerPCBase->pp_EnAltivec)
{
iframe->if_Context.ec_SRR1 |= PSL_VEC;
}
else
{
CommonExcError(PowerPCBase, iframe);
}
break;
}
case VEC_MACHINECHECK:
{
CommonExcHandler(PowerPCBase, iframe, (struct List*)&PowerPCBase->pp_ExcMCheck);
break;
}
case VEC_INSTSTORAGE:
{
CommonExcHandler(PowerPCBase, iframe, (struct List*)&PowerPCBase->pp_ExcIAccess);
break;
}
case VEC_FPUNAVAILABLE:
{
CommonExcHandler(PowerPCBase, iframe, (struct List*)&PowerPCBase->pp_ExcFPUn);
break;
}
case VEC_SYSTEMCALL:
{
struct SysCall* sc = (struct SysCall*)iframe->if_Context.ec_GPR[3]; //no checking of valid address
switch (sc->sc_Function)
{
case SC_CREATEMSG:
{
iframe->if_Context.ec_GPR[3] = (ULONG)KCreateMsgFramePPC(PowerPCBase);
break;
}
case SC_GETMSG:
{
iframe->if_Context.ec_GPR[3] = (ULONG)KGetMsgFramePPC(PowerPCBase);
break;
}
case SC_SENDMSG:
{
KSendMsgFramePPC(PowerPCBase, (struct MsgFrame*)sc->sc_Arg[0]);
break;
}
case SC_FREEMSG:
{
KFreeMsgFramePPC(PowerPCBase, (struct MsgFrame*)sc->sc_Arg[0]);
break;
}
case SC_SETCACHE:
{
KSetCache(PowerPCBase, sc->sc_Arg[0], (APTR)sc->sc_Arg[1], sc->sc_Arg[2]);
break;
}
default:
{
CommonExcHandler(PowerPCBase, iframe, (struct List*)&PowerPCBase->pp_ExcSystemCall);
break;
}
}
break;
}
case VEC_TRACE:
{
CommonExcHandler(PowerPCBase, iframe, (struct List*)&PowerPCBase->pp_ExcTrace);
break;
}
case VEC_PERFMONITOR:
{
CommonExcHandler(PowerPCBase, iframe, (struct List*)&PowerPCBase->pp_ExcPerfMon);
break;
}
case VEC_IBREAKPOINT:
{
CommonExcHandler(PowerPCBase, iframe, (struct List*)&PowerPCBase->pp_ExcIABR);
break;
}
default:
{
CommonExcError(PowerPCBase, iframe);
}
}
PowerPCBase->pp_ExceptionMode = 0;
setDEC(PowerPCBase->pp_Quantum);
return;
}
/********************************************************************************************
*
*
*
*********************************************************************************************/
PPCFUNCTION void TaskCheck(__reg("r3") struct PrivatePPCBase* PowerPCBase)
{
ULONG mask;
struct TaskPPC* currTask = PowerPCBase->pp_ThisPPCProc;
if(currTask)
{
if ((PowerPCBase->pp_TaskExcept) && (PowerPCBase->pp_TaskExcept == currTask) &&
(currTask->tp_Task.tc_ExceptData) && (mask = currTask->tp_Task.tc_SigRecvd & currTask->tp_Task.tc_SigExcept))
{
currTask->tp_Task.tc_SigRecvd &= ~mask;
currTask->tp_Task.tc_SigExcept &= ~mask;
ULONG (*ExcHandler)(__reg("r2") ULONG, __reg("r3") ULONG) = currTask->tp_Task.tc_ExceptCode;
ULONG tempR2 = getR2();
ULONG signal = ExcHandler((ULONG)currTask->tp_Task.tc_ExceptData, mask);
storeR2(tempR2);
currTask->tp_Task.tc_SigExcept |= signal;
}
}
if (!(PowerPCBase->pp_FlagWait))
{
struct WaitTime* currWait = (struct WaitTime*)PowerPCBase->pp_WaitTime.mlh_Head;
struct WaitTime* nxtWait;
while (nxtWait = (struct WaitTime*)currWait->wt_Node.ln_Succ)
{
if ((currWait->wt_TimeUpper < getTBU()) || ((currWait->wt_TimeUpper == getTBU()) && (currWait->wt_TimeLower < getTBL())))
{
if ((currTask) && (currTask == currWait->wt_Task))
{
currWait->wt_Task->tp_Task.tc_State = TS_RUN;
}
else
{
currWait->wt_Task->tp_Task.tc_State = TS_READY;
}
currWait->wt_Task->tp_Task.tc_SigRecvd |= SIGF_WAIT;
RemovePPC((struct Node*)currWait);
}
currWait = nxtWait;
}
}
struct TaskPPC* currWTask = (struct TaskPPC*)PowerPCBase->pp_WaitingTasks.mlh_Head;
struct TaskPPC* nxtWTask;
while (nxtWTask = (struct TaskPPC*)currWTask->tp_Task.tc_Node.ln_Succ)
{
if ((currWTask->tp_Task.tc_State == TS_READY) || (currWTask->tp_Task.tc_SigWait & currWTask->tp_Task.tc_SigRecvd))
{
currWTask->tp_Task.tc_State = TS_READY;
RemovePPC((struct Node*)currWTask);
AddTailPPC((struct List*)&PowerPCBase->pp_ReadyTasks, (struct Node*)currWTask); //Enqueue on pri?
}
currWTask = nxtWTask;
}
return;
}
/********************************************************************************************
*
* This function dispatches new PPC tasks, switches between tasks and redirect signals.
*
*********************************************************************************************/
PPCKERNEL void HandleMsgs(__reg("r3") struct PrivatePPCBase* PowerPCBase)
{
struct MsgFrame* currMsg = (struct MsgFrame*)PowerPCBase->pp_MsgQueue.mlh_Head;
struct MsgFrame* nxtMsg;
while (nxtMsg = (struct MsgFrame*)currMsg->mf_Message.mn_Node.ln_Succ)
{
switch (currMsg->mf_Identifier)
{
case ID_TPPC:
case ID_DONE:
case ID_END:
case ID_DNLL:
{
struct TaskPPC* myTask = currMsg->mf_PPCTask;
if ((currMsg->mf_Identifier == ID_TPPC) && (!(myTask)))
{
RemovePPC((struct Node*)currMsg);
AddTailPPC((struct List*)&PowerPCBase->pp_NewTasks, (struct Node*)currMsg);
}
else
{
struct MsgPortPPC* myPort = myTask->tp_Msgport;
if (myPort->mp_Semaphore.ssppc_SS.ss_QueueCount == -1)
{
RemovePPC((struct Node*)currMsg);
ULONG signal = 1 << (myPort->mp_Port.mp_SigBit);
myTask->tp_Task.tc_SigRecvd |= signal;
AddTailPPC(&myPort->mp_Port.mp_MsgList, (struct Node*)currMsg);
if (currMsg->mf_Identifier == ID_DONE)
{
myTask->tp_Task.tc_SigAlloc = currMsg->mf_Arg[1];
}
if (myTask == PowerPCBase->pp_ThisPPCProc)
{
myTask->tp_Task.tc_State = TS_RUN;
}
else
{
myTask->tp_Task.tc_State = TS_READY;
}
}
}
break;
}
case ID_XMSG:
{
struct MsgPortPPC* myPort = (struct MsgPortPPC*)currMsg->mf_Message.mn_ReplyPort;
if (myPort->mp_Semaphore.ssppc_SS.ss_QueueCount != -1)
{
break;
}
struct MsgFrame* oldMsg = (struct MsgFrame*)currMsg->mf_Arg[0];
RemovePPC((struct Node*)currMsg);
KFreeMsgFramePPC(PowerPCBase, currMsg);
myPort = (struct MsgPortPPC*)oldMsg->mf_Message.mn_ReplyPort;
struct TaskPPC* sigTask = (struct TaskPPC*)myPort->mp_Port.mp_SigTask;
if (!(sigTask))
{
break;
}
ULONG signal = 1 << (myPort->mp_Port.mp_SigBit);
sigTask->tp_Task.tc_SigRecvd |= signal;
AddTailPPC(&myPort->mp_Port.mp_MsgList, (struct Node*)oldMsg);
if (sigTask == PowerPCBase->pp_ThisPPCProc)
{
sigTask->tp_Task.tc_State = TS_RUN;
}
else
{
sigTask->tp_Task.tc_State = TS_READY;
}
break;
}
case ID_XPPC:
{
struct MsgPortPPC* myPort = (struct MsgPortPPC*)currMsg->mf_Arg[0];
if (myPort->mp_Semaphore.ssppc_SS.ss_QueueCount != -1)
{
break;
}
struct Node* xMsg = (struct Node*)currMsg->mf_Arg[1];
RemovePPC((struct Node*)currMsg);
KFreeMsgFramePPC(PowerPCBase, currMsg);
struct TaskPPC* sigTask = (struct TaskPPC*)myPort->mp_Port.mp_SigTask;
if (!(sigTask))
{
break;
}
ULONG signal = 1 << (myPort->mp_Port.mp_SigBit);
sigTask->tp_Task.tc_SigRecvd |= signal;
AddTailPPC(&myPort->mp_Port.mp_MsgList, xMsg);
if (sigTask == PowerPCBase->pp_ThisPPCProc)
{
sigTask->tp_Task.tc_State = TS_RUN;
}
else
{
sigTask->tp_Task.tc_State = TS_READY;
}
break;
}
case ID_LLPP:
{
struct PrivateTask* myTask = (struct PrivateTask*)PowerPCBase->pp_ThisPPCProc;
if ((myTask) && (myTask->pt_Mirror68K == (struct Task*)currMsg->mf_Arg[0]))
{
myTask->pt_Task.tp_Task.tc_State = TS_RUN;
myTask->pt_Task.tp_Task.tc_SigRecvd |= currMsg->mf_Signals;
}
else
{
struct PrivateTask* nxtTask;
struct PrivateTask* currTask = (struct PrivateTask*)PowerPCBase->pp_WaitingTasks.mlh_Head;
while (nxtTask = (struct PrivateTask*)currTask->pt_Task.tp_Task.tc_Node.ln_Succ)
{
if (currTask->pt_Mirror68K == (struct Task*)currMsg->mf_Arg[0])
{
currTask->pt_Task.tp_Task.tc_State = TS_READY;
currTask->pt_Task.tp_Task.tc_SigRecvd |= currMsg->mf_Signals;
break;
}
currTask = nxtTask;
}
if (!(nxtTask))
{
currTask = (struct PrivateTask*)PowerPCBase->pp_ReadyTasks.mlh_Head;
while (nxtTask = (struct PrivateTask*)currTask->pt_Task.tp_Task.tc_Node.ln_Succ)
{
if (currTask->pt_Mirror68K == (struct Task*)currMsg->mf_Arg[0])
{
currTask->pt_Task.tp_Task.tc_SigRecvd |= currMsg->mf_Signals;
break;
}
currTask = nxtTask;
}
}
}
RemovePPC((struct Node*)currMsg);
KFreeMsgFramePPC(PowerPCBase, currMsg);
break;
}
default:
{
RemovePPC((struct Node*)currMsg);
KFreeMsgFramePPC(PowerPCBase, currMsg);
}
}
currMsg = nxtMsg;
}
return;
}
/********************************************************************************************
*
*
*
*********************************************************************************************/
PPCKERNEL void SwitchPPC(__reg("r3") struct PrivatePPCBase* PowerPCBase, __reg("r4") struct iframe* iframe)
{
struct TaskPPC* currTask = PowerPCBase->pp_ThisPPCProc;
while (1)
{
if (!(currTask))
{
if (currTask = (struct TaskPPC*)RemHeadPPC((struct List*)&PowerPCBase->pp_NewTasks))
{
DispatchPPC(PowerPCBase, (struct MsgFrame*)currTask);
break;
}
if (currTask = (struct TaskPPC*)RemHeadPPC((struct List*)&PowerPCBase->pp_ReadyTasks))
{
currTask->tp_Task.tc_State = TS_RUN;
PowerPCBase->pp_ThisPPCProc = currTask;
iframe = (struct iframe*)currTask->tp_ContextMem;
currTask->tp_Task.tc_SPReg = (APTR)iframe->if_Context.ec_GPR[1];
break;
}
break;
}
if (currTask->tp_Task.tc_State == TS_REMOVED)
{
AddTailPPC((struct List*)&PowerPCBase->pp_RemovedTasks, (struct Node*)currTask);
currTask = NULL;
PowerPCBase->pp_ThisPPCProc = currTask;
iframe->if_Context.ec_SRR1 = MACHINESTATE_DEFAULT;
iframe->if_Context.ec_UPC.ec_SRR0 = (PowerPCBase->pp_PPCMemBase) + OFFSET_SYSMEM;
}
else if (currTask->tp_Task.tc_State == TS_CHANGING)
{
currTask->tp_Task.tc_State = TS_WAIT;
AddTailPPC((struct List*)&PowerPCBase->pp_WaitingTasks, (struct Node*)currTask);
currTask = NULL;
PowerPCBase->pp_ThisPPCProc = currTask;
}
else
{
if (currTask = (struct TaskPPC*)RemHeadPPC((struct List*)&PowerPCBase->pp_NewTasks))
{
struct TaskPPC* oldTask = PowerPCBase->pp_ThisPPCProc;
oldTask->tp_Task.tc_State = TS_READY;
AddTailPPC((struct List*)&PowerPCBase->pp_ReadyTasks, (struct Node*)oldTask);
DispatchPPC(PowerPCBase, (struct MsgFrame*)currTask);
}
else if (currTask = (struct TaskPPC*)RemHeadPPC((struct List*)&PowerPCBase->pp_ReadyTasks))
{
struct TaskPPC* oldTask = PowerPCBase->pp_ThisPPCProc;
oldTask->tp_Task.tc_State = TS_READY;
currTask->tp_Task.tc_State = TS_RUN;
AddTailPPC((struct List*)&PowerPCBase->pp_ReadyTasks, (struct Node*)oldTask);
PowerPCBase->pp_ThisPPCProc = currTask;
iframe = (struct iframe*)currTask->tp_ContextMem;
currTask->tp_Task.tc_SPReg = (APTR)iframe->if_Context.ec_GPR[1];
}
break;
}
}
return;
}
/********************************************************************************************
*
*
*
*********************************************************************************************/
PPCKERNEL void DispatchPPC(__reg("r3") struct PrivatePPCBase* PowerPCBase, __reg("r4") struct MsgFrame* myFrame)
{
struct NewTask* newTask = (struct NewTask*)myFrame->mf_Arg[0];
PowerPCBase->pp_IdUsrTasks += 1;
newTask->nt_Task.pt_Task.tp_Id = PowerPCBase->pp_IdUsrTasks;
newTask->nt_Task.pt_Task.tp_PowerPCBase = PowerPCBase;
newTask->nt_Task.pt_Task.tp_Task.tc_Node.ln_Type = NT_PPCTASK;
newTask->nt_Task.pt_Task.tp_Task.tc_State = TS_RUN;
newTask->nt_Task.pt_Task.tp_ContextMem = &newTask->nt_Context;
newTask->nt_Task.pt_Task.tp_BATStorage = &newTask->nt_BatStore;
newTask->nt_Task.pt_Task.tp_Link.tl_Task = newTask;
newTask->nt_Task.pt_Task.tp_Link.tl_Sig = 0xfff;
newTask->nt_Task.pt_Task.tp_StackMem = (APTR)(myFrame->mf_Arg[0] + 2048);
newTask->nt_Task.pt_Mirror68K = (struct Task*)myFrame->mf_Arg[2];
newTask->nt_Task.pt_MirrorPort = myFrame->mf_MirrorPort;
newTask->nt_Task.pt_Task.tp_Task.tc_Node.ln_Name = (APTR)&newTask->nt_Name;
newTask->nt_Task.pt_Task.tp_StackSize = (ULONG)myFrame->mf_Message.mn_Node.ln_Name;
newTask->nt_Task.pt_Task.tp_Task.tc_SPLower = newTask->nt_Task.pt_Task.tp_StackMem;
newTask->nt_Task.pt_Task.tp_Task.tc_SPUpper = (APTR)((ULONG)newTask->nt_Task.pt_Task.tp_StackMem + newTask->nt_Task.pt_Task.tp_StackSize);
newTask->nt_Task.pt_Task.tp_Task.tc_SPReg = (APTR)((ULONG)newTask->nt_Task.pt_Task.tp_Task.tc_SPUpper - 32);
NewListPPC((struct List*)&newTask->nt_Task.pt_Task.tp_Task.tc_MemEntry);
newTask->nt_Task.pt_Task.tp_Task.tc_SigAlloc = myFrame->mf_Arg[1];
PowerPCBase->pp_ThisPPCProc = (struct TaskPPC*)newTask;
newTask->nt_Task.pt_Task.tp_TaskPtr = &newTask->nt_TaskPtr;
newTask->nt_TaskPtr.tptr_Task = (struct TaskPPC*)newTask;
newTask->nt_TaskPtr.tptr_Node.ln_Name = newTask->nt_Task.pt_Task.tp_Task.tc_Node.ln_Name;
AddTailPPC((struct List*)&PowerPCBase->pp_AllTasks, (struct Node*)&newTask->nt_TaskPtr);
PowerPCBase->pp_NumAllTasks += 1;
NewListPPC((struct List*)&newTask->nt_Task.pt_Task.tp_TaskPools);
NewListPPC((struct List*)&newTask->nt_Port.mp_IntMsg);
NewListPPC((struct List*)&newTask->nt_Port.mp_Port.mp_MsgList);
newTask->nt_Port.mp_Port.mp_SigBit = SIGB_DOS;
NewListPPC((struct List*)&newTask->nt_Port.mp_Semaphore.ssppc_SS.ss_WaitQueue);
newTask->nt_Port.mp_Semaphore.ssppc_SS.ss_Owner = NULL;
newTask->nt_Port.mp_Semaphore.ssppc_SS.ss_NestCount = 0;
newTask->nt_Port.mp_Semaphore.ssppc_SS.ss_QueueCount = -1;
newTask->nt_Port.mp_Semaphore.ssppc_reserved = &newTask->nt_SSReserved1;
newTask->nt_Port.mp_Port.mp_SigTask = newTask;
newTask->nt_Port.mp_Port.mp_Flags = PA_SIGNAL;
newTask->nt_Port.mp_Port.mp_Node.ln_Type = NT_MSGPORTPPC;
newTask->nt_Task.pt_Task.tp_Msgport = &newTask->nt_Port;
struct iframe* newFrame = (struct iframe*)&newTask->nt_Context;
newFrame->if_Context.ec_SRR1 = MACHINESTATE_DEFAULT;
newFrame->if_Context.ec_UPC.ec_SRR0 = *((ULONG*)((ULONG)PowerPCBase + 2 + _LVOStartTask));
newFrame->if_Context.ec_GPR[1] = (ULONG)newTask->nt_Task.pt_Task.tp_Task.tc_SPReg;
newFrame->if_Context.ec_GPR[2] = NULL;
newFrame->if_Context.ec_GPR[3] = (ULONG)PowerPCBase;
newFrame->if_Context.ec_GPR[4] = (ULONG)myFrame;
ULONG* EndofStack = (APTR)newFrame->if_Context.ec_GPR[1];
EndofStack[0] = 0; //Clear end of stack chain for SwapStack
CopyMemPPC(&PowerPCBase->pp_SystemBATs, &newFrame->if_BATs, sizeof(struct BATArray) * 4);
CopyMemPPC(&PowerPCBase->pp_SystemBATs, newTask->nt_Task.pt_Task.tp_BATStorage, sizeof(struct BATArray) * 4);
for (int i = 0; i < 16; i++)
{
newFrame->if_Segments[i] = PowerPCBase->pp_SystemSegs[i];
}
return;
}
/********************************************************************************************
*
*
*
*********************************************************************************************/
PPCKERNEL void CommonExcHandler(__reg("r3") struct PrivatePPCBase* PowerPCBase, __reg("r4") struct iframe* iframe, __reg("r5") struct List* excList)
{
struct ExcData* nxtNode;
struct ExcData* currNode = (struct ExcData*)excList->lh_Head;
ULONG status = EXCRETURN_NORMAL;
while (nxtNode = (struct ExcData*)currNode->ed_Node.ln_Succ)
{
if (currNode->ed_ExcID & iframe->if_Context.ec_ExcID)
{
if ((currNode->ed_Flags & EXCF_GLOBAL) || ((currNode->ed_Flags & EXCF_LOCAL) && (currNode->ed_Task) && (currNode->ed_Task == PowerPCBase->pp_ThisPPCProc)))
{
if (currNode->ed_Flags & EXCF_LARGECONTEXT)
{
ULONG (*ExcHandler)(__reg("r2") ULONG, __reg("r3") struct EXCContext*) = currNode->ed_Code;
ULONG tempR2 = getR2();
status = ExcHandler(currNode->ed_Data, &iframe->if_Context);
storeR2(tempR2);
}
else if (currNode->ed_Flags & EXCF_SMALLCONTEXT)
{
status = SmallExcHandler(currNode, iframe);
}
if (status == EXCRETURN_ABORT)
{
break;
}
}
}
currNode = nxtNode;
}
if ((status == EXCRETURN_NORMAL) && (iframe->if_Context.ec_ExcID != EXCF_DACCESS))
{
CommonExcError(PowerPCBase, iframe);
}
return;
}
/********************************************************************************************
*
*
*
*********************************************************************************************/
PPCKERNEL VOID CPUStats(__reg("r3") struct PrivatePPCBase* PowerPCBase)
{
ULONG currentTBL = getTBL();
ULONG prevTBL = PowerPCBase->pp_CurrentTBL;
PowerPCBase->pp_CurrentTBL = currentTBL;
if (prevTBL)
{
ULONG systemLoad = 0;
ULONG cpuLoad = 0;
ULONG cpuUsage = 0;
ULONG cpuTime = currentTBL - prevTBL;
struct TaskPtr* currTask = (struct TaskPtr*)PowerPCBase->pp_AllTasks.mlh_Head;
struct TaskPtr* nextTask;
while (nextTask = (struct TaskPtr*)currTask->tptr_Node.ln_Succ)
{
struct TaskPPC* ppcTask = (struct TaskPPC*)currTask->tptr_Task;
ppcTask->tp_Totalelapsed += cpuTime;
if ((ppcTask->tp_Task.tc_State == TS_RUN) || (ppcTask->tp_Task.tc_State == TS_CHANGING))
{
ppcTask->tp_Elapsed += cpuTime;
}
else if (ppcTask->tp_Task.tc_State == TS_WAIT)
{
ppcTask->tp_Elapsed2 += cpuTime;
}
if (!(PowerPCBase->pp_BusyCounter))
{
ULONG elapsed = ppcTask->tp_Elapsed;
ULONG elapsed2 = ppcTask->tp_Elapsed2;
ULONG total = ppcTask->tp_Totalelapsed;
ULONG activity = (elapsed + elapsed2) >> 10;
ULONG actelps = (elapsed >> 10) * 10000;
if (activity)
{
activity = actelps / activity;
}
ppcTask->tp_Activity = activity;
LONG busy = (total >> 10) - (elapsed2 >> 10);
if (busy < 0)
{
busy = 0;
}
busy = (busy * 10000) / (total >> 10);
ppcTask->tp_Busy = busy;
systemLoad += busy;
ULONG total10 = total >> 10;
if (total10)
{
cpuUsage = actelps / total10;
}
if (cpuUsage > 10000)
{
cpuUsage = 10000;
}
ppcTask->tp_CPUusage = cpuUsage;
cpuLoad += cpuUsage;
ppcTask->tp_Elapsed = 0;
ppcTask->tp_Elapsed2 = 0;
ppcTask->tp_Totalelapsed = 0;
}
currTask = nextTask;
}
if (!(PowerPCBase->pp_BusyCounter))
{
PowerPCBase->pp_BusyCounter = 25;
PowerPCBase->pp_SystemLoad = systemLoad;
PowerPCBase->pp_CPULoad = cpuLoad;
}
PowerPCBase->pp_BusyCounter -= 1;
}
return;
}
#if 0
/********************************************************************************************
*
*
*
*********************************************************************************************/
PPCKERNEL VOID writememLongPPC(__reg("r3") ULONG Base, __reg("r4") ULONG offset, __reg("r5") ULONG value)
{
*((ULONG*)(Base + offset)) = value;
return;
}
/********************************************************************************************
*
*
*
*********************************************************************************************/
PPCKERNEL ULONG readmemLongPPC(__reg("r3") ULONG Base, __reg("r4") ULONG offset)
{
ULONG res;
res = *((ULONG*)(Base + offset));
return res;
}
#endif
/********************************************************************************************
*
*
*
*********************************************************************************************/
PPCKERNEL struct MsgFrame* KCreateMsgFramePPC(__reg("r3") struct PrivatePPCBase* PowerPCBase)
{
ULONG msgFrame = 0;
switch (PowerPCBase->pp_DeviceID)
{
case DEVICE_HARRIER:
{
ULONG msgOffset = readmemLongPPC(PPC_XCSR_BASE, XCSR_MIOFT);
msgFrame = readmemLongPPC(msgOffset, 0);
writememLongPPC(PPC_XCSR_BASE, XCSR_MIOFT, (msgOffset + 4) & 0xffff3fff);
break;
}