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Merge pull request #339 from bunnei/fixup-gsp-synch

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Fixup gsp synch
This commit is contained in:
bunnei 2014-12-25 22:52:40 -05:00
commit e5ddbfee02
7 changed files with 59 additions and 117 deletions
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6
src/core/arm/arm_interface.h
View file

@ -77,6 +77,12 @@ public:
*/
virtual u64 GetTicks() const = 0;
/**
* Advance the CPU core by the specified number of ticks (e.g. to simulate CPU execution time)
* @param ticks Number of ticks to advance the CPU core
*/
virtual void AddTicks(u64 ticks) = 0;
/**
* Saves the current CPU context
* @param ctx Thread context to save

49
src/core/arm/dyncom/arm_dyncom.cpp
View file

@ -47,68 +47,38 @@ ARM_DynCom::ARM_DynCom() : ticks(0) {
ARM_DynCom::~ARM_DynCom() {
}
/**
* Set the Program Counter to an address
* @param addr Address to set PC to
*/
void ARM_DynCom::SetPC(u32 pc) {
state->pc = state->Reg[15] = pc;
}
/*
* Get the current Program Counter
* @return Returns current PC
*/
u32 ARM_DynCom::GetPC() const {
return state->Reg[15];
}
/**
* Get an ARM register
* @param index Register index (0-15)
* @return Returns the value in the register
*/
u32 ARM_DynCom::GetReg(int index) const {
return state->Reg[index];
}
/**
* Set an ARM register
* @param index Register index (0-15)
* @param value Value to set register to
*/
void ARM_DynCom::SetReg(int index, u32 value) {
state->Reg[index] = value;
}
/**
* Get the current CPSR register
* @return Returns the value of the CPSR register
*/
u32 ARM_DynCom::GetCPSR() const {
return state->Cpsr;
}
/**
* Set the current CPSR register
* @param cpsr Value to set CPSR to
*/
void ARM_DynCom::SetCPSR(u32 cpsr) {
state->Cpsr = cpsr;
}
/**
* Returns the number of clock ticks since the last reset
* @return Returns number of clock ticks
*/
u64 ARM_DynCom::GetTicks() const {
return ticks;
}
/**
* Executes the given number of instructions
* @param num_instructions Number of instructions to executes
*/
void ARM_DynCom::AddTicks(u64 ticks) {
this->ticks += ticks;
}
void ARM_DynCom::ExecuteInstructions(int num_instructions) {
state->NumInstrsToExecute = num_instructions;
@ -118,11 +88,6 @@ void ARM_DynCom::ExecuteInstructions(int num_instructions) {
ticks += InterpreterMainLoop(state.get());
}
/**
* Saves the current CPU context
* @param ctx Thread context to save
* @todo Do we need to save Reg[15] and NextInstr?
*/
void ARM_DynCom::SaveContext(ThreadContext& ctx) {
memcpy(ctx.cpu_registers, state->Reg, sizeof(ctx.cpu_registers));
memcpy(ctx.fpu_registers, state->ExtReg, sizeof(ctx.fpu_registers));
@ -139,11 +104,6 @@ void ARM_DynCom::SaveContext(ThreadContext& ctx) {
ctx.mode = state->NextInstr;
}
/**
* Loads a CPU context
* @param ctx Thread context to load
* @param Do we need to load Reg[15] and NextInstr?
*/
void ARM_DynCom::LoadContext(const ThreadContext& ctx) {
memcpy(state->Reg, ctx.cpu_registers, sizeof(ctx.cpu_registers));
memcpy(state->ExtReg, ctx.fpu_registers, sizeof(ctx.fpu_registers));
@ -160,7 +120,6 @@ void ARM_DynCom::LoadContext(const ThreadContext& ctx) {
state->NextInstr = ctx.mode;
}
/// Prepare core for thread reschedule (if needed to correctly handle state)
void ARM_DynCom::PrepareReschedule() {
state->NumInstrsToExecute = 0;
}

14
src/core/arm/dyncom/arm_dyncom.h
View file

@ -27,14 +27,14 @@ public:
* Get the current Program Counter
* @return Returns current PC
*/
u32 GetPC() const;
u32 GetPC() const override;
/**
* Get an ARM register
* @param index Register index (0-15)
* @return Returns the value in the register
*/
u32 GetReg(int index) const;
u32 GetReg(int index) const override;
/**
* Set an ARM register
@ -47,7 +47,7 @@ public:
* Get the current CPSR register
* @return Returns the value of the CPSR register
*/
u32 GetCPSR() const;
u32 GetCPSR() const override;
/**
* Set the current CPSR register
@ -59,7 +59,13 @@ public:
* Returns the number of clock ticks since the last reset
* @return Returns number of clock ticks
*/
u64 GetTicks() const;
u64 GetTicks() const override;
/**
* Advance the CPU core by the specified number of ticks (e.g. to simulate CPU execution time)
* @param ticks Number of ticks to advance the CPU core
*/
void AddTicks(u64 ticks) override;
/**
* Saves the current CPU context

51
src/core/arm/interpreter/arm_interpreter.cpp
View file

@ -38,78 +38,43 @@ ARM_Interpreter::~ARM_Interpreter() {
delete state;
}
/**
* Set the Program Counter to an address
* @param addr Address to set PC to
*/
void ARM_Interpreter::SetPC(u32 pc) {
state->pc = state->Reg[15] = pc;
}
/*
* Get the current Program Counter
* @return Returns current PC
*/
u32 ARM_Interpreter::GetPC() const {
return state->pc;
}
/**
* Get an ARM register
* @param index Register index (0-15)
* @return Returns the value in the register
*/
u32 ARM_Interpreter::GetReg(int index) const {
return state->Reg[index];
}
/**
* Set an ARM register
* @param index Register index (0-15)
* @param value Value to set register to
*/
void ARM_Interpreter::SetReg(int index, u32 value) {
state->Reg[index] = value;
}
/**
* Get the current CPSR register
* @return Returns the value of the CPSR register
*/
u32 ARM_Interpreter::GetCPSR() const {
return state->Cpsr;
}
/**
* Set the current CPSR register
* @param cpsr Value to set CPSR to
*/
void ARM_Interpreter::SetCPSR(u32 cpsr) {
state->Cpsr = cpsr;
}
/**
* Returns the number of clock ticks since the last reset
* @return Returns number of clock ticks
*/
u64 ARM_Interpreter::GetTicks() const {
return ARMul_Time(state);
return state->NumInstrs;
}
void ARM_Interpreter::AddTicks(u64 ticks) {
state->NumInstrs += ticks;
}
/**
* Executes the given number of instructions
* @param num_instructions Number of instructions to executes
*/
void ARM_Interpreter::ExecuteInstructions(int num_instructions) {
state->NumInstrsToExecute = num_instructions - 1;
ARMul_Emulate32(state);
}
/**
* Saves the current CPU context
* @param ctx Thread context to save
* @todo Do we need to save Reg[15] and NextInstr?
*/
void ARM_Interpreter::SaveContext(ThreadContext& ctx) {
memcpy(ctx.cpu_registers, state->Reg, sizeof(ctx.cpu_registers));
memcpy(ctx.fpu_registers, state->ExtReg, sizeof(ctx.fpu_registers));
@ -126,11 +91,6 @@ void ARM_Interpreter::SaveContext(ThreadContext& ctx) {
ctx.mode = state->NextInstr;
}
/**
* Loads a CPU context
* @param ctx Thread context to load
* @param Do we need to load Reg[15] and NextInstr?
*/
void ARM_Interpreter::LoadContext(const ThreadContext& ctx) {
memcpy(state->Reg, ctx.cpu_registers, sizeof(ctx.cpu_registers));
memcpy(state->ExtReg, ctx.fpu_registers, sizeof(ctx.fpu_registers));
@ -147,7 +107,6 @@ void ARM_Interpreter::LoadContext(const ThreadContext& ctx) {
state->NextInstr = ctx.mode;
}
/// Prepare core for thread reschedule (if needed to correctly handle state)
void ARM_Interpreter::PrepareReschedule() {
state->NumInstrsToExecute = 0;
}

6
src/core/arm/interpreter/arm_interpreter.h
View file

@ -60,6 +60,12 @@ public:
*/
u64 GetTicks() const override;
/**
* Advance the CPU core by the specified number of ticks (e.g. to simulate CPU execution time)
* @param ticks Number of ticks to advance the CPU core
*/
void AddTicks(u64 ticks) override;
/**
* Saves the current CPU context
* @param ctx Thread context to save

8
src/core/hle/hle.cpp
View file

@ -43,7 +43,15 @@ void CallSVC(u32 opcode) {
void Reschedule(const char *reason) {
_dbg_assert_msg_(Kernel, reason != 0 && strlen(reason) < 256, "Reschedule: Invalid or too long reason.");
// TODO(bunnei): It seems that games depend on some CPU execution time elapsing during HLE
// routines. This simulates that time by artificially advancing the number of CPU "ticks".
// The value was chosen empirically, it seems to work well enough for everything tested, but
// is likely not ideal. We should find a more accurate way to simulate timing with HLE.
Core::g_app_core->AddTicks(4000);
Core::g_app_core->PrepareReschedule();
g_reschedule = true;
}

38
src/core/hw/gpu.cpp
View file

@ -21,12 +21,10 @@ namespace GPU {
Regs g_regs;
u32 g_cur_line = 0; ///< Current vertical screen line
u64 g_last_line_ticks = 0; ///< CPU tick count from last vertical screen line
u64 g_last_frame_ticks = 0; ///< CPU tick count from last frame
static u32 kFrameCycles = 0; ///< 268MHz / 60 frames per second
static u32 kFrameTicks = 0; ///< Approximate number of instructions/frame
static u64 frame_ticks = 0; ///< 268MHz / 60 frames per second
static u32 cur_line = 0; ///< Current vertical screen line
static u64 last_frame_ticks = 0; ///< CPU tick count from last frame
static u64 last_update_tick = 0; ///< CPU ticl count from last GPU update
template <typename T>
inline void Read(T &var, const u32 raw_addr) {
@ -179,7 +177,6 @@ template void Write<u8>(u32 addr, const u8 data);
/// Update hardware
void Update() {
auto& framebuffer_top = g_regs.framebuffer_config[0];
u64 current_ticks = Core::g_app_core->GetTicks();
// Update the frame after a certain number of CPU ticks have elapsed. This assumes that the
// active frame in memory is always complete to render. There also may be issues with this
@ -189,9 +186,9 @@ void Update() {
// primitive homebrew relies on a vertical blank interrupt to happen inevitably (regardless of a
// threading reschedule).
if ((current_ticks - g_last_frame_ticks) > GPU::kFrameTicks) {
if ((Core::g_app_core->GetTicks() - last_frame_ticks) > (GPU::frame_ticks)) {
VideoCore::g_renderer->SwapBuffers();
g_last_frame_ticks = current_ticks;
last_frame_ticks = Core::g_app_core->GetTicks();
}
// Synchronize GPU on a thread reschedule: Because we cannot accurately predict a vertical
@ -199,17 +196,20 @@ void Update() {
// accurately when this is signalled between thread switches.
if (HLE::g_reschedule) {
u64 current_ticks = Core::g_app_core->GetTicks();
u64 line_ticks = (GPU::frame_ticks / framebuffer_top.height) * 16;
// Synchronize line...
if ((current_ticks - g_last_line_ticks) >= GPU::kFrameTicks / framebuffer_top.height) {
//// Synchronize line...
if ((current_ticks - last_update_tick) >= line_ticks) {
GSP_GPU::SignalInterrupt(GSP_GPU::InterruptId::PDC0);
g_cur_line++;
g_last_line_ticks = current_ticks;
cur_line++;
last_update_tick += line_ticks;
}
// Synchronize frame...
if (g_cur_line >= framebuffer_top.height) {
g_cur_line = 0;
if (cur_line >= framebuffer_top.height) {
cur_line = 0;
VideoCore::g_renderer->SwapBuffers();
GSP_GPU::SignalInterrupt(GSP_GPU::InterruptId::PDC1);
}
}
@ -217,11 +217,9 @@ void Update() {
/// Initialize hardware
void Init() {
kFrameCycles = 268123480 / Settings::values.gpu_refresh_rate;
kFrameTicks = kFrameCycles / 3;
g_cur_line = 0;
g_last_frame_ticks = g_last_line_ticks = Core::g_app_core->GetTicks();
frame_ticks = 268123480 / Settings::values.gpu_refresh_rate;
cur_line = 0;
last_update_tick = last_frame_ticks = Core::g_app_core->GetTicks();
auto& framebuffer_top = g_regs.framebuffer_config[0];
auto& framebuffer_sub = g_regs.framebuffer_config[1];