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author | Lectem <lectem@gmail.com> | 2016-07-30 18:19:00 +0200 |
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committer | Lectem <lectem@gmail.com> | 2016-08-02 16:45:15 +0200 |
commit | a94fb932ff8a326a2e85ab3814663af565313ec5 (patch) | |
tree | a56b18ae8e62bfe3dff6a2948264e1918eafcada /src/core/hle/kernel/session.h | |
parent | Input GUI: Add tab to remap controls (#1900) (diff) | |
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Diffstat (limited to '')
-rw-r--r-- | src/core/hle/kernel/session.h | 118 |
1 files changed, 103 insertions, 15 deletions
diff --git a/src/core/hle/kernel/session.h b/src/core/hle/kernel/session.h index 26b086f87..8ec889967 100644 --- a/src/core/hle/kernel/session.h +++ b/src/core/hle/kernel/session.h @@ -16,42 +16,130 @@ namespace IPC { -constexpr 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); +enum DescriptorType : u32 { + // Buffer related desciptors types (mask : 0x0F) + StaticBuffer = 0x02, + PXIBuffer = 0x04, + MappedBuffer = 0x08, + // Handle related descriptors types (mask : 0x30, but need to check for buffer related descriptors first ) + CopyHandle = 0x00, + MoveHandle = 0x10, + CallingPid = 0x20, +}; + +/** + * @brief Creates a command header to be used for IPC + * @param command_id ID of the command to create a header for. + * @param normal_params Size of the normal parameters in words. Up to 63. + * @param translate_params_size Size of the translate parameters in words. Up to 63. + * @return The created IPC header. + * + * Normal parameters are sent directly to the process while the translate parameters might go through modifications and checks by the kernel. + * The translate parameters are described by headers generated with the IPC::*Desc functions. + * + * @note While #normal_params is equivalent to the number of normal parameters, #translate_params_size includes the size occupied by the translate parameters headers. + */ +constexpr u32 MakeHeader(u16 command_id, unsigned int normal_params, unsigned int translate_params_size) { + return (u32(command_id) << 16) | ((u32(normal_params) & 0x3F) << 6) | (u32(translate_params_size) & 0x3F); } -constexpr u32 MoveHandleDesc(unsigned int num_handles = 1) { - return 0x0 | ((num_handles - 1) << 26); +union Header { + u32 raw; + BitField< 0, 6, u32> translate_params_size; + BitField< 6, 6, u32> normal_params; + BitField<16, 16, u32> command_id; +}; + +inline Header ParseHeader(u32 header) { + return{ header }; } -constexpr u32 CopyHandleDesc(unsigned int num_handles = 1) { - return 0x10 | ((num_handles - 1) << 26); +constexpr u32 MoveHandleDesc(u32 num_handles = 1) { + return MoveHandle | ((num_handles - 1) << 26); +} + +constexpr u32 CopyHandleDesc(u32 num_handles = 1) { + return CopyHandle | ((num_handles - 1) << 26); } constexpr u32 CallingPidDesc() { - return 0x20; + return CallingPid; +} + +constexpr bool isHandleDescriptor(u32 descriptor) { + return (descriptor & 0xF) == 0x0; } -constexpr u32 TransferHandleDesc() { - return 0x20; +constexpr u32 HandleNumberFromDesc(u32 handle_descriptor) { + return (handle_descriptor >> 26) + 1; } -constexpr u32 StaticBufferDesc(u32 size, unsigned int buffer_id) { - return 0x2 | (size << 14) | ((buffer_id & 0xF) << 10); +constexpr u32 StaticBufferDesc(u32 size, u8 buffer_id) { + return StaticBuffer | (size << 14) | ((buffer_id & 0xF) << 10); +} + +union StaticBufferDescInfo { + u32 raw; + BitField< 10, 4, u32> buffer_id; + BitField< 14, 18, u32> size; +}; + +inline StaticBufferDescInfo ParseStaticBufferDesc(const u32 desc) { + return{ desc }; +} + +/** + * @brief Creates a header describing a buffer to be sent over PXI. + * @param size Size of the buffer. Max 0x00FFFFFF. + * @param buffer_id The Id of the buffer. Max 0xF. + * @param is_read_only true if the buffer is read-only. If false, the buffer is considered to have read-write access. + * @return The created PXI buffer header. + * + * The next value is a phys-address of a table located in the BASE memregion. + */ +inline u32 PXIBufferDesc(u32 size, unsigned buffer_id, bool is_read_only) { + u32 type = PXIBuffer; + if (is_read_only) type |= 0x2; + return type | (size << 8) | ((buffer_id & 0xF) << 4); } enum MappedBufferPermissions { - R = 2, - W = 4, + R = 1, + W = 2, RW = R | W, }; constexpr u32 MappedBufferDesc(u32 size, MappedBufferPermissions perms) { - return 0x8 | (size << 4) | (u32)perms; + return MappedBuffer | (size << 4) | (u32(perms) << 1); +} + +union MappedBufferDescInfo { + u32 raw; + BitField< 4, 28, u32> size; + BitField< 1, 2, MappedBufferPermissions> perms; +}; + +inline MappedBufferDescInfo ParseMappedBufferDesc(const u32 desc) { + return{ desc }; } +inline DescriptorType GetDescriptorType(u32 descriptor) { + // Note: Those checks must be done in this order + if (isHandleDescriptor(descriptor)) + return (DescriptorType)(descriptor & 0x30); + + // handle the fact that the following descriptors can have rights + if (descriptor & MappedBuffer) + return MappedBuffer; + + if (descriptor & PXIBuffer) + return PXIBuffer; + + return StaticBuffer; } +} // namespace IPC + namespace Kernel { static const int kCommandHeaderOffset = 0x80; ///< Offset into command buffer of header @@ -64,7 +152,7 @@ static const int kCommandHeaderOffset = 0x80; ///< Offset into command buffer of * @param offset Optional offset into command buffer * @return Pointer to command buffer */ -inline static u32* GetCommandBuffer(const int offset = 0) { +inline u32* GetCommandBuffer(const int offset = 0) { return (u32*)Memory::GetPointer(GetCurrentThread()->GetTLSAddress() + kCommandHeaderOffset + offset); } |