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308 lines
8.4 KiB
C++
308 lines
8.4 KiB
C++
// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <cstddef>
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#include <memory>
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#include <boost/serialization/shared_ptr.hpp>
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#include <boost/serialization/split_member.hpp>
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#include <boost/serialization/version.hpp>
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#include "common/common_types.h"
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#include "core/arm/skyeye_common/arm_regformat.h"
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#include "core/arm/skyeye_common/vfp/asm_vfp.h"
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#include "core/core_timing.h"
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#include "core/memory.h"
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namespace Memory {
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struct PageTable;
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};
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namespace Core {
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/// Generic ARM11 CPU interface
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class ARM_Interface : NonCopyable {
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public:
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explicit ARM_Interface(u32 id, std::shared_ptr<Core::Timing::Timer> timer)
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: timer(timer), id(id){};
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virtual ~ARM_Interface() {}
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struct ThreadContext {
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u32 GetStackPointer() const {
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return cpu_registers[13];
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}
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void SetStackPointer(u32 value) {
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cpu_registers[13] = value;
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}
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u32 GetLinkRegister() const {
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return cpu_registers[14];
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}
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void SetLinkRegister(u32 value) {
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cpu_registers[14] = value;
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}
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u32 GetProgramCounter() const {
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return cpu_registers[15];
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}
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void SetProgramCounter(u32 value) {
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cpu_registers[15] = value;
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}
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std::array<u32, 16> cpu_registers{};
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u32 cpsr{};
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std::array<u32, 64> fpu_registers{};
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u32 fpscr{};
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u32 fpexc{};
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private:
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friend class boost::serialization::access;
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template <class Archive>
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void serialize(Archive& ar, const unsigned int file_version) {
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ar& cpu_registers;
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ar& fpu_registers;
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ar& cpsr;
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ar& fpscr;
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ar& fpexc;
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}
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};
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/// Runs the CPU until an event happens
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virtual void Run() = 0;
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/// Step CPU by one instruction
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virtual void Step() = 0;
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/// Clear all instruction cache
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virtual void ClearInstructionCache() = 0;
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/**
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* Invalidate the code cache at a range of addresses.
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* @param start_address The starting address of the range to invalidate.
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* @param length The length (in bytes) of the range to invalidate.
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*/
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virtual void InvalidateCacheRange(u32 start_address, std::size_t length) = 0;
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/// Clears the exclusive monitor's state.
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virtual void ClearExclusiveState() = 0;
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/// Notify CPU emulation that page tables have changed
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virtual void SetPageTable(const std::shared_ptr<Memory::PageTable>& page_table) = 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 GetPC() const = 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 GetReg(int index) const = 0;
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/**
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* Set an ARM register
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* @param index Register index (0-15)
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* @param value Value to set register to
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*/
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virtual void SetReg(int index, u32 value) = 0;
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/**
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* Gets the value of a VFP register
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* @param index Register index (0-31)
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* @return Returns the value in the register
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*/
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virtual u32 GetVFPReg(int index) const = 0;
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/**
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* Sets a VFP register to the given value
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* @param index Register index (0-31)
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* @param value Value to set register to
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*/
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virtual void SetVFPReg(int index, u32 value) = 0;
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/**
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* Gets the current value within a given VFP system register
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* @param reg The VFP system register
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* @return The value within the VFP system register
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*/
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virtual u32 GetVFPSystemReg(VFPSystemRegister reg) const = 0;
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/**
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* Sets the VFP system register to the given value
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* @param reg The VFP system register
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* @param value Value to set the VFP system register to
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*/
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virtual void SetVFPSystemReg(VFPSystemRegister reg, u32 value) = 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 GetCPSR() const = 0;
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/**
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* Set the current CPSR register
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* @param cpsr Value to set CPSR to
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*/
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virtual void SetCPSR(u32 cpsr) = 0;
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/**
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* Gets the value stored in a CP15 register.
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* @param reg The CP15 register to retrieve the value from.
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* @return the value stored in the given CP15 register.
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*/
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virtual u32 GetCP15Register(CP15Register reg) const = 0;
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/**
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* Stores the given value into the indicated CP15 register.
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* @param reg The CP15 register to store the value into.
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* @param value The value to store into the CP15 register.
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*/
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virtual void SetCP15Register(CP15Register reg, u32 value) = 0;
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/**
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* Saves the current CPU context
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* @param ctx Thread context to save
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*/
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virtual void SaveContext(ThreadContext& ctx) = 0;
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/**
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* Loads a CPU context
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* @param ctx Thread context to load
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*/
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virtual void LoadContext(const ThreadContext& ctx) = 0;
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/// Prepare core for thread reschedule (if needed to correctly handle state)
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virtual void PrepareReschedule() = 0;
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Core::Timing::Timer& GetTimer() {
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return *timer;
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}
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const Core::Timing::Timer& GetTimer() const {
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return *timer;
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}
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u32 GetID() const {
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return id;
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}
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protected:
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// This us used for serialization. Returning nullptr is valid if page tables are not used.
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virtual std::shared_ptr<Memory::PageTable> GetPageTable() const = 0;
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std::shared_ptr<Core::Timing::Timer> timer;
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private:
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u32 id;
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friend class boost::serialization::access;
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template <class Archive>
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void save(Archive& ar, const unsigned int file_version) const {
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ar << timer;
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ar << id;
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const auto page_table = GetPageTable();
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ar << page_table;
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for (int i = 0; i < 15; i++) {
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const auto r = GetReg(i);
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ar << r;
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}
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const auto pc = GetPC();
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ar << pc;
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const auto cpsr = GetCPSR();
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ar << cpsr;
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for (int i = 0; i < 64; i++) {
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const auto r = GetVFPReg(i);
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ar << r;
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}
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for (std::size_t i = 0; i < VFPSystemRegister::VFP_SYSTEM_REGISTER_COUNT; i++) {
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const auto reg = static_cast<VFPSystemRegister>(i);
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u32 r = 0;
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switch (reg) {
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case VFP_FPSCR:
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case VFP_FPEXC:
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r = GetVFPSystemReg(reg);
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default:
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break;
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}
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ar << r;
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}
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for (std::size_t i = 0; i < CP15Register::CP15_REGISTER_COUNT; i++) {
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const auto reg = static_cast<CP15Register>(i);
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u32 r = 0;
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switch (reg) {
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case CP15_THREAD_UPRW:
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case CP15_THREAD_URO:
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r = GetCP15Register(reg);
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default:
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break;
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}
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ar << r;
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}
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}
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template <class Archive>
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void load(Archive& ar, const unsigned int file_version) {
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ClearInstructionCache();
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ar >> timer;
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ar >> id;
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std::shared_ptr<Memory::PageTable> page_table{};
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ar >> page_table;
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SetPageTable(page_table);
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u32 r;
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for (int i = 0; i < 15; i++) {
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ar >> r;
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SetReg(i, r);
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}
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ar >> r;
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SetPC(r);
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ar >> r;
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SetCPSR(r);
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for (int i = 0; i < 64; i++) {
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ar >> r;
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SetVFPReg(i, r);
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}
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for (std::size_t i = 0; i < VFPSystemRegister::VFP_SYSTEM_REGISTER_COUNT; i++) {
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ar >> r;
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const auto reg = static_cast<VFPSystemRegister>(i);
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switch (reg) {
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case VFP_FPSCR:
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case VFP_FPEXC:
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SetVFPSystemReg(reg, r);
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default:
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break;
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}
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}
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for (std::size_t i = 0; i < CP15Register::CP15_REGISTER_COUNT; i++) {
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ar >> r;
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const auto reg = static_cast<CP15Register>(i);
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switch (reg) {
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case CP15_THREAD_UPRW:
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case CP15_THREAD_URO:
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SetCP15Register(reg, r);
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default:
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break;
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}
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}
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}
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BOOST_SERIALIZATION_SPLIT_MEMBER()
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};
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} // namespace Core
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BOOST_CLASS_VERSION(Core::ARM_Interface, 1)
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BOOST_CLASS_VERSION(Core::ARM_Interface::ThreadContext, 1)
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