piwalker/dolphin
1
0
Fork 0
mirror of https://github.com/dolphin-emu/dolphin.git synced 2025-07-23 06:09:50 -06:00
Code Issues Packages Projects Releases Wiki Activity

IOS: Emulate IOS boot timings

Browse Source
This commit is contained in:
Léo Lam
2021-02-26 15:21:36 +01:00
parent 820c4836d7
commit a658cbce16
3 changed files with 32 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

34
Source/Core/Core/IOS/IOS.cpp
View File

@ -67,6 +67,7 @@ constexpr u64 ENQUEUE_REQUEST_FLAG = 0x100000000ULL;
static CoreTiming::EventType* s_event_enqueue;
static CoreTiming::EventType* s_event_sdio_notify;
static CoreTiming::EventType* s_event_finish_ppc_bootstrap;
static CoreTiming::EventType* s_event_finish_ios_boot;
constexpr u32 ADDR_MEM1_SIZE = 0x3100;
constexpr u32 ADDR_MEM1_SIM_SIZE = 0x3104;
@ -410,6 +411,21 @@ private:
std::vector<u8> m_bytes;
};
static void FinishIOSBoot(u64 ios_title_id)
{
// Shut down the active IOS first before switching to the new one.
s_ios.reset();
s_ios = std::make_unique<EmulationKernel>(ios_title_id);
}
static constexpr SystemTimers::TimeBaseTick GetIOSBootTicks(u32 version)
{
// Older IOS versions are monolithic so the main ELF is much larger and takes longer to load.
if (version < 28)
return 16'000'000_tbticks;
return 2'600'000_tbticks;
}
// Similar to syscall 0x42 (ios_boot); this is used to change the current active IOS.
// IOS writes the new version to 0x3140 before restarting, but it does *not* poke any
// of the other constants to the memory. Warning: this resets the kernel instance.
@ -419,6 +435,10 @@ private:
// on the NAND, or the call will fail like on a Wii.
bool Kernel::BootIOS(const u64 ios_title_id, const std::string& boot_content_path)
{
// IOS suspends regular PPC<->ARM IPC before loading a new IOS.
// IPC is not resumed if the boot fails for any reason.
m_ipc_paused = true;
if (!boot_content_path.empty())
{
// Load the ARM binary to memory (if possible).
@ -433,9 +453,11 @@ bool Kernel::BootIOS(const u64 ios_title_id, const std::string& boot_content_pat
return false;
}
// Shut down the active IOS first before switching to the new one.
s_ios.reset();
s_ios = std::make_unique<EmulationKernel>(ios_title_id);
if (Core::IsRunningAndStarted())
CoreTiming::ScheduleEvent(GetIOSBootTicks(GetVersion()), s_event_finish_ios_boot, ios_title_id);
else
FinishIOSBoot(ios_title_id);
return true;
}
@ -707,7 +729,7 @@ void Kernel::HandleIPCEvent(u64 userdata)
void Kernel::UpdateIPC()
{
if (!IsReady())
if (m_ipc_paused || !IsReady())
return;
if (!m_request_queue.empty())
@ -761,6 +783,7 @@ void Kernel::DoState(PointerWrap& p)
p.Do(m_request_queue);
p.Do(m_reply_queue);
p.Do(m_last_reply_time);
p.Do(m_ipc_paused);
p.Do(m_title_id);
p.Do(m_ppc_uid);
p.Do(m_ppc_gid);
@ -858,6 +881,9 @@ void Init()
s_event_finish_ppc_bootstrap =
CoreTiming::RegisterEvent("IOSFinishPPCBootstrap", FinishPPCBootstrap);
s_event_finish_ios_boot = CoreTiming::RegisterEvent(
"IOSFinishIOSBoot", [](u64 ios_title_id, s64) { FinishIOSBoot(ios_title_id); });
DIDevice::s_finish_executing_di_command =
CoreTiming::RegisterEvent("FinishDICommand", DIDevice::FinishDICommandCallback);