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John-K/me_wrapper.c

Last active October 6, 2020 04:07
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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;
}
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