yuzu/src/core/arm/arm_interface.h
Lioncash 70624e1c1d core/arm: Remove obsolete Unicorn memory mapping
This was initially necessary when AArch64 JIT emulation was in its
infancy and all memory-related instructions weren't implemented.

Given the JIT now has all of these facilities implemented, we can remove
these functions from the CPU interface.
2019-07-11 05:35:46 -04:00

169 lines
4.5 KiB
C++

// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <array>
#include <vector>
#include "common/common_types.h"
namespace Common {
struct PageTable;
}
namespace Kernel {
enum class VMAPermission : u8;
}
namespace Core {
/// Generic ARMv8 CPU interface
class ARM_Interface : NonCopyable {
public:
virtual ~ARM_Interface() {}
struct ThreadContext {
std::array<u64, 31> cpu_registers;
u64 sp;
u64 pc;
u32 pstate;
std::array<u8, 4> padding;
std::array<u128, 32> vector_registers;
u32 fpcr;
u32 fpsr;
u64 tpidr;
};
// Internally within the kernel, it expects the AArch64 version of the
// thread context to be 800 bytes in size.
static_assert(sizeof(ThreadContext) == 0x320);
/// Runs the CPU until an event happens
virtual void Run() = 0;
/// Step CPU by one instruction
virtual void Step() = 0;
/// Clear all instruction cache
virtual void ClearInstructionCache() = 0;
/// Notifies CPU emulation that the current page table has changed.
///
/// @param new_page_table The new page table.
/// @param new_address_space_size_in_bits The new usable size of the address space in bits.
/// This can be either 32, 36, or 39 on official software.
///
virtual void PageTableChanged(Common::PageTable& new_page_table,
std::size_t new_address_space_size_in_bits) = 0;
/**
* Set the Program Counter to an address
* @param addr Address to set PC to
*/
virtual void SetPC(u64 addr) = 0;
/*
* Get the current Program Counter
* @return Returns current PC
*/
virtual u64 GetPC() const = 0;
/**
* Get an ARM register
* @param index Register index
* @return Returns the value in the register
*/
virtual u64 GetReg(int index) const = 0;
/**
* Set an ARM register
* @param index Register index
* @param value Value to set register to
*/
virtual void SetReg(int index, u64 value) = 0;
/**
* Gets the value of a specified vector register.
*
* @param index The index of the vector register.
* @return the value within the vector register.
*/
virtual u128 GetVectorReg(int index) const = 0;
/**
* Sets a given value into a vector register.
*
* @param index The index of the vector register.
* @param value The new value to place in the register.
*/
virtual void SetVectorReg(int index, u128 value) = 0;
/**
* Get the current PSTATE register
* @return Returns the value of the PSTATE register
*/
virtual u32 GetPSTATE() const = 0;
/**
* Set the current PSTATE register
* @param pstate Value to set PSTATE to
*/
virtual void SetPSTATE(u32 pstate) = 0;
virtual VAddr GetTlsAddress() const = 0;
virtual void SetTlsAddress(VAddr address) = 0;
/**
* Gets the value within the TPIDR_EL0 (read/write software thread ID) register.
*
* @return the value within the register.
*/
virtual u64 GetTPIDR_EL0() const = 0;
/**
* Sets a new value within the TPIDR_EL0 (read/write software thread ID) register.
*
* @param value The new value to place in the register.
*/
virtual void SetTPIDR_EL0(u64 value) = 0;
/**
* Saves the current CPU context
* @param ctx Thread context to save
*/
virtual void SaveContext(ThreadContext& ctx) = 0;
/**
* Loads a CPU context
* @param ctx Thread context to load
*/
virtual void LoadContext(const ThreadContext& ctx) = 0;
/// Clears the exclusive monitor's state.
virtual void ClearExclusiveState() = 0;
/// Prepare core for thread reschedule (if needed to correctly handle state)
virtual void PrepareReschedule() = 0;
struct BacktraceEntry {
std::string module;
u64 address;
u64 original_address;
u64 offset;
std::string name;
};
std::vector<BacktraceEntry> GetBacktrace() const;
/// fp (= r29) points to the last frame record.
/// Note that this is the frame record for the *previous* frame, not the current one.
/// Note we need to subtract 4 from our last read to get the proper address
/// Frame records are two words long:
/// fp+0 : pointer to previous frame record
/// fp+8 : value of lr for frame
void LogBacktrace() const;
};
} // namespace Core