me_wrapper.prx

me_wrapper.c

// func_00002070
// sceMeWrapper_driver_0x24317CD0
int module_start(void) {
  int tachyonVersion;
  float pllFreq;
  undefined4 local_20;
  int local_1c;
  
  initMEAtomicsAndInterruptHandler();
  sceLfatfsWaitReady();
  sceMeBootStart660(2);
  pllFreq = (float)sceSysregPllGetFrequency();
  _DAT_bfc00710 = (int)pllFreq;
  sceKernelRegisterSysEventHandler();
  sceMePowerControlAvcPower(0);
  tachyonVersion = sceSysregGetTachyonVersion();
  if (0x4fffff < tachyonVersion) {
    local_20 = 0x10;
    tachyonVersion = sceKernelQueryMemoryPartitionInfo(4,&local_20);
    if ((tachyonVersion < 0) || (local_1c != -0x77d00000)) {
      sceKernelAllocPartitionMemory(1,"old ME partition",2,0x100000,0x88300000);
    }
  }
  return 0;
}

// func_000014e0
void * initMEAtomicsAndInterruptHandler(void) {
  void *pvVar1;
  
  pvVar1 = (void *)sceKernelCreateMutex("SceMediaEngineRpc",0x101,0,0);
  SceMediaEngineRpc_Mutex = pvVar1;
  if (-1 < (int)pvVar1) {
    pvVar1 = (void *)sceKernelCreateSema("SceMediaEngineAvcPower",0x101,1,1,0);
    SceMediaEngineAvcPower_Sema = pvVar1;
    if (-1 < (int)pvVar1) {
      pvVar1 = (void *)sceKernelCreateEventFlag("SceMediaEngineRpcWait",0x201,0,0);
      SceMediaEngineRpcWait_Flag = pvVar1;
      if (-1 < (int)pvVar1) {
        sceSysregIntrEnd();
        pvVar1 = (void *)sceKernelRegisterIntrHandler
                                   (0x1f,2,RpcWaitIntrHandler,SceMediaEngineRpcWait_Flag,(void *)0x0
                                   );
        if (-1 < (int)pvVar1) {
          pvVar1 = (void *)sceKernelEnableIntr(0x1f);
        }
      }
    }
  }
  return pvVar1;
}

// func_00001acc
int RpcWaitIntrHandler(void *unk,SceUID flag) {
  sceKernelSetEventFlag(flag,1);
  return -1;
}

// func_00001d6c
int sceMeBootStart660(int param_1) {
  SceUID fd;
  int iVar1;
  int iVar2;
  char *file;
  u32 offset;
  uint local_s6_336;
  SceOff SVar3;
  
  iVar2 = -0x7ffffefe;
  if (param_1 - 1U < 4) {
    iVar2 = sceSysregGetTachyonVersion();
    if ((0x4fffff < iVar2) && (param_1 != 2)) {
      param_1 = 3;
    }
    iVar2 = 0;
    if ((DAT_0000004c != param_1) && (iVar2 = FUN_0000172c(), -1 < iVar2)) {
      if (((param_1 != 3) || (DAT_0000004c != 2)) && ((param_1 != 2 || (DAT_0000004c != 3)))) {
        iVar2 = sceSysregGetTachyonVersion();
        file = "flash0:/kd/resource/me_t2img.img"; //load this file on Slim models or later
        if ((iVar2 < 0x500000) && // Tachyon 0x500000 is Slim, so load one of the following on Fat PSPs
           ((file = "flash0:/kd/resource/me_sdimg.img", param_1 != 1 &&
            (file = "flash0:/kd/resource/me_blimg.img", param_1 != 4)))) {
          file = "flash0:/kd/resource/meimg.img";
        }
        offset = 0x4000001;
        fd = sceIoOpen(file,0x4000001,0);
        if (fd < 0) {
          unlockRPCMutex();
          return fd;
        }
        SVar3 = sceIoLseek(fd,offset,0);
        iVar2 = (int)((ulonglong)SVar3 >> 0x20);
        sceIoLseek(fd,offset,0);
        if (0x63fff < iVar2) {
          sceIoClose(fd);
          unlockRPCMutex();
          return 0x80000022;
        }
        sceSysregMeResetEnable();
        local_s6_336 = 0x883ff000 - iVar2;
        iVar1 = sceIoRead(fd,local_s6_336,iVar2);
        sceIoClose(fd);
        if (iVar1 != iVar2) {
          unlockRPCMutex();
          if (-1 < iVar1) {
            return 0x80000022;
          }
          return iVar1;
        }
        maybeDecryptDecompressMEFW(local_s6_336,iVar1);
        bootME(local_s6_336,1);
      }
      DAT_0000004c = param_1;
      unlockRPCMutex();
      sceMeRequest(0x185,(uint)(param_1 != 2));
      iVar2 = 0;
    }
  }
  return iVar2;
}

// func_00001754
void unlockRPCMutex(void) {
  sceKernelUnlockMutex(SceMediaEngineRpc_Mutex,1);
  return;
}

// func_00001c04
u32 maybeDecryptDecompressMEFW(void *param_1,u32 param_2) {
  u32 uVar1;
  u32 local_20 [4];
  
  uVar1 = sceWmd_driver_0x7A0E484C(param_1,param_2,local_20);
  if ((int)uVar1 < 0) {
    local_20[0] = uVar1;
  }
  return local_20[0];
}

// func_00001c30
int bootME(uint param_1,int param_2) {
  sceSysregMeResetEnable();
  sceSysregMeBusClockEnable();
  memcpy(0xbfc00040,0,0xd4);
  _DAT_bfc00060 = _DAT_bfc00060 | _DAT_bc100040 & 3;
  _DAT_bfc00064 = _DAT_bfc00064 | param_1 >> 0x10;
  _DAT_bfc00068 = _DAT_bfc00068 | param_1 & 0xffff;
  sceKernelDcacheWritebackInvalidateAll();
  sceDdrFlush(4);
  if (param_2 != 0) {
    _DAT_bfc0070c = 0x1ff01ff;
    _DAT_bfc00714 = 2;
  }
  _DAT_bfc00700 = -3;
  sceSysregVmeResetDisable();
  sceSysregMeResetDisable();
  if (param_2 != 0) {
    while (_DAT_bfc00700 == -3) {
      sceKernelDelayThread(1000);
    }
  }
  _DAT_bfc00700 = 0;
  sceSysregAvcResetDisable();
  sceDdrFlush(8);
  return 0;
}

// func_00001778
int sceMeRequest(undefined4 param_1,undefined4 param_2,undefined4 param_3,undefined4 param_4,
                undefined4 param_5,undefined4 param_6,undefined4 param_7,undefined4 param_8,
                undefined4 param_9) {
  int iVar1;
  
  iVar1 = sceKernelLockMutex(SceMediaEngineRpc_Mutex,1,0);
  if (-1 < iVar1) {
    _DAT_bfc00624 = param_9;
    _DAT_bfc00600 = param_1;
    _DAT_bfc00608 = param_2;
    _DAT_bfc0060c = param_3;
    _DAT_bfc00610 = param_4;
    _DAT_bfc00614 = param_5;
    _DAT_bfc00618 = param_6;
    _DAT_bfc0061c = param_7;
    _DAT_bfc00620 = param_8;
    sceDdrFlush(5);
    sceSysregInterruptToOther();
    sceKernelWaitEventFlag(SceMediaEngineRpcWait_Flag,1,0x20,(u32 *)0x0,(SceUInt *)0x0);
    iVar1 = _DAT_bfc00628;
    sceKernelUnlockMutex(SceMediaEngineRpc_Mutex,1);
  }
  return iVar1;
}

// func_00001890
void sceMeRequestWithDcacheInvalidate
               (undefined4 param_1,undefined4 param_2,undefined4 param_3,undefined4 param_4,
               undefined4 param_5,undefined4 param_6,undefined4 param_7,undefined4 param_8,
               undefined4 param_9) {
  sceKernelDcacheWritebackInvalidateAll();
  sceMeRequest(param_1,param_2,param_3,param_4,param_5,param_6,param_7,param_8,param_9);
  return;
}