changed hw_lcd to use ARM core correct tick counter instead of [what was actually] just an instruction count. this seems to fix timing issues with the 3DS_Homebrew_Pong3Dv2 demo.
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ed15feebf1
3 changed files with 48 additions and 8 deletions
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@ -24,32 +24,65 @@
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#pragma once
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#include "common.h"
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#include "common_types.h"
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/// Generic ARM11 CPU interface
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class ARM_Interface {
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public:
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ARM_Interface() {
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num_instructions_ = 0;
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}
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~ARM_Interface() {
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}
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/// Step CPU by one instruction
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void Step() {
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ExecuteInstruction();
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ticks_++;
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num_instructions_++;
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}
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virtual void SetPC(u32 pc) = 0;
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/**
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* Set the Program Counter to an address
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* @param addr Address to set PC to
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*/
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virtual void SetPC(u32 addr) = 0;
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/*
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* Get the current Program Counter
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* @return Returns current PC
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*/
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virtual u32 PC() = 0;
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/**
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* Get an ARM register
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* @param index Register index (0-15)
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* @return Returns the value in the register
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*/
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virtual u32 Reg(int index) = 0;
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/**
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* Get the current CPSR register
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* @return Returns the value of the CPSR register
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*/
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virtual u32 CPSR() = 0;
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u64 ticks() { return ticks_; }
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/**
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* Returns the number of clock ticks since the last rese
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* @return Returns number of clock ticks
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*/
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virtual u64 GetTicks() = 0;
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/// Getter for num_instructions_
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u64 num_instructions() { return num_instructions_; }
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private:
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/// Execture next instruction
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virtual void ExecuteInstruction() = 0;
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u64 ticks_;
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u64 num_instructions_; ///< Number of instructions executed
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DISALLOW_COPY_AND_ASSIGN(ARM_Interface);
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};
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@ -24,6 +24,7 @@
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#pragma once
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#include "common.h"
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#include "common_types.h"
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#include "arm/arm_interface.h"
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@ -45,6 +46,12 @@ public:
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u32 CPSR();
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u64 GetTicks() {
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return ARMul_Time(state);
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}
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private:
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ARMul_State* state;
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DISALLOW_COPY_AND_ASSIGN(ARM_Interpreter);
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};
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@ -28,7 +28,7 @@
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namespace LCD {
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static const u32 kFrameTicks = 268123480 / 30; // 268MHz / 30 frames per second
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static const u32 kFrameTicks = 268123480 / 60; ///< 268MHz / 60 frames per second
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u64 g_last_ticks = 0; ///< Last CPU ticks
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@ -42,7 +42,7 @@ inline void Write(u32 addr, const T data) {
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/// Update hardware
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void Update() {
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u64 current_ticks = Core::g_app_core->ticks();
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u64 current_ticks = Core::g_app_core->GetTicks();
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if ((current_ticks - g_last_ticks) >= kFrameTicks) {
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g_last_ticks = current_ticks;
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@ -52,7 +52,7 @@ void Update() {
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/// Initialize hardware
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void Init() {
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g_last_ticks = Core::g_app_core->ticks();
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g_last_ticks = Core::g_app_core->GetTicks();
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NOTICE_LOG(LCD, "LCD initialized OK");
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}
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