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Support for loading Ancast images

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This commit is contained in:
GaryOderNichts
2022-10-21 23:19:40 +02:00
parent 79e09c3731
commit 82d20ce352
5 changed files with 215 additions and 2 deletions
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23
Source/Core/Core/IOS/IOS.cpp
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@ -17,6 +17,7 @@
#include "Common/CommonTypes.h"
#include "Common/Logging/Log.h"
#include "Common/Timer.h"
#include "Core/Boot/AncastTypes.h"
#include "Core/Boot/DolReader.h"
#include "Core/Boot/ElfReader.h"
#include "Core/CommonTitles.h"
@ -206,6 +207,15 @@ static void ReleasePPC()
PC = 0x3400;
}
static void ReleasePPCAncast()
{
Memory::Write_U32(0, 0);
// On a real console the Espresso verifies and decrypts the Ancast image,
// then jumps to the decrypted ancast body.
// The Ancast loader already did this, so just jump to the decrypted body.
PC = ESPRESSO_ANCAST_LOCATION_VIRT + sizeof(EspressoAncastHeader);
}
void RAMOverrideForIOSMemoryValues(MemorySetupType setup_type)
{
// Don't touch anything if the feature isn't enabled.
@ -393,11 +403,14 @@ bool Kernel::BootstrapPPC(const std::string& boot_content_path)
// Reset the PPC and pause its execution until we're ready.
ResetAndPausePPC();
if (dol.IsAncast())
INFO_LOG_FMT(IOS, "BootstrapPPC: Loading ancast image");
if (!dol.LoadIntoMemory())
return false;
INFO_LOG_FMT(IOS, "BootstrapPPC: {}", boot_content_path);
CoreTiming::ScheduleEvent(ticks, s_event_finish_ppc_bootstrap);
CoreTiming::ScheduleEvent(ticks, s_event_finish_ppc_bootstrap, dol.IsAncast());
return true;
}
@ -865,7 +878,13 @@ IOSC& Kernel::GetIOSC()
static void FinishPPCBootstrap(u64 userdata, s64 cycles_late)
{
ReleasePPC();
// See Kernel::BootstrapPPC
const bool is_ancast = userdata == 1;
if (is_ancast)
ReleasePPCAncast();
else
ReleasePPC();
SConfig::OnNewTitleLoad();
INFO_LOG_FMT(IOS, "Bootstrapping done.");
}