mirror of
https://github.com/yuzu-mirror/yuzu.git
synced 2024-11-19 10:17:33 +01:00
118 lines
3.9 KiB
C++
118 lines
3.9 KiB
C++
// Copyright 2014 Citra Emulator Project
|
|
// Licensed under GPLv2 or any later version
|
|
// Refer to the license.txt file included.
|
|
|
|
#pragma once
|
|
|
|
#include <string>
|
|
|
|
#include "common/assert.h"
|
|
#include "common/common_types.h"
|
|
|
|
#include "core/hle/kernel/kernel.h"
|
|
#include "core/hle/kernel/thread.h"
|
|
#include "core/hle/result.h"
|
|
#include "core/memory.h"
|
|
|
|
namespace IPC {
|
|
|
|
inline u32 MakeHeader(u16 command_id, unsigned int regular_params, unsigned int translate_params) {
|
|
return ((u32)command_id << 16) | (((u32)regular_params & 0x3F) << 6) | (((u32)translate_params & 0x3F) << 0);
|
|
}
|
|
|
|
inline u32 MoveHandleDesc(unsigned int num_handles = 1) {
|
|
return 0x0 | ((num_handles - 1) << 26);
|
|
}
|
|
|
|
inline u32 CopyHandleDesc(unsigned int num_handles = 1) {
|
|
return 0x10 | ((num_handles - 1) << 26);
|
|
}
|
|
|
|
inline u32 CallingPidDesc() {
|
|
return 0x20;
|
|
}
|
|
|
|
inline u32 StaticBufferDesc(u32 size, unsigned int buffer_id) {
|
|
return 0x2 | (size << 14) | ((buffer_id & 0xF) << 10);
|
|
}
|
|
|
|
enum MappedBufferPermissions {
|
|
R = 2,
|
|
W = 4,
|
|
RW = R | W,
|
|
};
|
|
|
|
inline u32 MappedBufferDesc(u32 size, MappedBufferPermissions perms) {
|
|
return 0x8 | (size << 4) | (u32)perms;
|
|
}
|
|
|
|
}
|
|
|
|
namespace Kernel {
|
|
|
|
static const int kCommandHeaderOffset = 0x80; ///< Offset into command buffer of header
|
|
|
|
/**
|
|
* Returns a pointer to the command buffer in the current thread's TLS
|
|
* TODO(Subv): This is not entirely correct, the command buffer should be copied from
|
|
* the thread's TLS to an intermediate buffer in kernel memory, and then copied again to
|
|
* the service handler process' memory.
|
|
* @param offset Optional offset into command buffer
|
|
* @return Pointer to command buffer
|
|
*/
|
|
inline static u32* GetCommandBuffer(const int offset = 0) {
|
|
return (u32*)Memory::GetPointer(GetCurrentThread()->GetTLSAddress() + kCommandHeaderOffset + offset);
|
|
}
|
|
|
|
/**
|
|
* Kernel object representing the client endpoint of an IPC session. Sessions are the basic CTR-OS
|
|
* primitive for communication between different processes, and are used to implement service calls
|
|
* to the various system services.
|
|
*
|
|
* To make a service call, the client must write the command header and parameters to the buffer
|
|
* located at offset 0x80 of the TLS (Thread-Local Storage) area, then execute a SendSyncRequest
|
|
* SVC call with its Session handle. The kernel will read the command header, using it to marshall
|
|
* the parameters to the process at the server endpoint of the session. After the server replies to
|
|
* the request, the response is marshalled back to the caller's TLS buffer and control is
|
|
* transferred back to it.
|
|
*
|
|
* In Citra, only the client endpoint is currently implemented and only HLE calls, where the IPC
|
|
* request is answered by C++ code in the emulator, are supported. When SendSyncRequest is called
|
|
* with the session handle, this class's SyncRequest method is called, which should read the TLS
|
|
* buffer and emulate the call accordingly. Since the code can directly read the emulated memory,
|
|
* no parameter marshalling is done.
|
|
*
|
|
* In the long term, this should be turned into the full-fledged IPC mechanism implemented by
|
|
* CTR-OS so that IPC calls can be optionally handled by the real implementations of processes, as
|
|
* opposed to HLE simulations.
|
|
*/
|
|
class Session : public WaitObject {
|
|
public:
|
|
Session();
|
|
~Session() override;
|
|
|
|
std::string GetTypeName() const override { return "Session"; }
|
|
|
|
static const HandleType HANDLE_TYPE = HandleType::Session;
|
|
HandleType GetHandleType() const override { return HANDLE_TYPE; }
|
|
|
|
/**
|
|
* Handles a synchronous call to this session using HLE emulation. Emulated <-> emulated calls
|
|
* aren't supported yet.
|
|
*/
|
|
virtual ResultVal<bool> SyncRequest() = 0;
|
|
|
|
// TODO(bunnei): These functions exist to satisfy a hardware test with a Session object
|
|
// passed into WaitSynchronization. Figure out the meaning of them.
|
|
|
|
bool ShouldWait() override {
|
|
return true;
|
|
}
|
|
|
|
void Acquire() override {
|
|
ASSERT_MSG(!ShouldWait(), "object unavailable!");
|
|
}
|
|
};
|
|
|
|
}
|