Use std::move where appropriate.
Subv
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// Copyright 2016 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 "common/common_types.h"
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#include "core/hle/kernel/thread.h"
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#include "core/memory.h"
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namespace Kernel {
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class ServerSession;
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// TODO(Subv): Move these declarations out of here
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static const int kCommandHeaderOffset = 0x80; ///< Offset into command buffer of header
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/**
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* Returns a pointer to the command buffer in the current thread's TLS
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* TODO(Subv): This is not entirely correct, the command buffer should be copied from
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* the thread's TLS to an intermediate buffer in kernel memory, and then copied again to
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* the service handler process' memory.
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* @param offset Optional offset into command buffer
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* @return Pointer to command buffer
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*/
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inline u32* GetCommandBuffer(const int offset = 0) {
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return (u32*)Memory::GetPointer(GetCurrentThread()->GetTLSAddress() + kCommandHeaderOffset +
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offset);
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}
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}
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namespace IPC {
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enum DescriptorType : u32 {
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// Buffer related desciptors types (mask : 0x0F)
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StaticBuffer = 0x02,
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PXIBuffer = 0x04,
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MappedBuffer = 0x08,
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// Handle related descriptors types (mask : 0x30, but need to check for buffer related
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// descriptors first )
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CopyHandle = 0x00,
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MoveHandle = 0x10,
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CallingPid = 0x20,
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};
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/**
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* @brief Creates a command header to be used for IPC
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* @param command_id ID of the command to create a header for.
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* @param normal_params Size of the normal parameters in words. Up to 63.
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* @param translate_params_size Size of the translate parameters in words. Up to 63.
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* @return The created IPC header.
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*
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* Normal parameters are sent directly to the process while the translate parameters might go
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* through modifications and checks by the kernel.
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* The translate parameters are described by headers generated with the IPC::*Desc functions.
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*
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* @note While #normal_params is equivalent to the number of normal parameters,
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* #translate_params_size includes the size occupied by the translate parameters headers.
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*/
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constexpr u32 MakeHeader(u16 command_id, unsigned int normal_params,
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unsigned int translate_params_size) {
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return (u32(command_id) << 16) | ((u32(normal_params) & 0x3F) << 6) |
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(u32(translate_params_size) & 0x3F);
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}
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union Header {
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u32 raw;
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BitField<0, 6, u32> translate_params_size;
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BitField<6, 6, u32> normal_params;
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BitField<16, 16, u32> command_id;
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};
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inline Header ParseHeader(u32 header) {
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return {header};
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}
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constexpr u32 MoveHandleDesc(u32 num_handles = 1) {
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return MoveHandle | ((num_handles - 1) << 26);
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}
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constexpr u32 CopyHandleDesc(u32 num_handles = 1) {
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return CopyHandle | ((num_handles - 1) << 26);
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}
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constexpr u32 CallingPidDesc() {
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return CallingPid;
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}
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constexpr bool isHandleDescriptor(u32 descriptor) {
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return (descriptor & 0xF) == 0x0;
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}
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constexpr u32 HandleNumberFromDesc(u32 handle_descriptor) {
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return (handle_descriptor >> 26) + 1;
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}
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constexpr u32 StaticBufferDesc(u32 size, u8 buffer_id) {
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return StaticBuffer | (size << 14) | ((buffer_id & 0xF) << 10);
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}
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union StaticBufferDescInfo {
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u32 raw;
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BitField<10, 4, u32> buffer_id;
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BitField<14, 18, u32> size;
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};
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inline StaticBufferDescInfo ParseStaticBufferDesc(const u32 desc) {
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return {desc};
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}
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/**
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* @brief Creates a header describing a buffer to be sent over PXI.
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* @param size Size of the buffer. Max 0x00FFFFFF.
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* @param buffer_id The Id of the buffer. Max 0xF.
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* @param is_read_only true if the buffer is read-only. If false, the buffer is considered to have
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* read-write access.
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* @return The created PXI buffer header.
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*
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* The next value is a phys-address of a table located in the BASE memregion.
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*/
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inline u32 PXIBufferDesc(u32 size, unsigned buffer_id, bool is_read_only) {
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u32 type = PXIBuffer;
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if (is_read_only)
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type |= 0x2;
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return type | (size << 8) | ((buffer_id & 0xF) << 4);
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}
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enum MappedBufferPermissions {
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R = 1,
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W = 2,
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RW = R | W,
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};
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constexpr u32 MappedBufferDesc(u32 size, MappedBufferPermissions perms) {
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return MappedBuffer | (size << 4) | (u32(perms) << 1);
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}
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union MappedBufferDescInfo {
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u32 raw;
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BitField<4, 28, u32> size;
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BitField<1, 2, MappedBufferPermissions> perms;
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};
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inline MappedBufferDescInfo ParseMappedBufferDesc(const u32 desc) {
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return{ desc };
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}
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inline DescriptorType GetDescriptorType(u32 descriptor) {
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// Note: Those checks must be done in this order
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if (isHandleDescriptor(descriptor))
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return (DescriptorType)(descriptor & 0x30);
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// handle the fact that the following descriptors can have rights
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if (descriptor & MappedBuffer)
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return MappedBuffer;
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if (descriptor & PXIBuffer)
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return PXIBuffer;
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return StaticBuffer;
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}
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} // namespace IPC
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