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authorLectem <lectem@gmail.com>2016-12-26 13:39:45 +0100
committerLectem <lectem@gmail.com>2016-12-26 14:07:29 +0100
commit8f2b642415a488064e214a1a6428fec422dd8374 (patch)
tree08274248fa268366cbf8f29282942f504d9b57df /src/core/hle
parentMerge pull request #2369 from MerryMage/core-frontend (diff)
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Diffstat (limited to 'src/core/hle')
-rw-r--r--src/core/hle/ipc.h111
-rw-r--r--src/core/hle/ipc_helpers.h259
2 files changed, 322 insertions, 48 deletions
diff --git a/src/core/hle/ipc.h b/src/core/hle/ipc.h
index 4e094faa7..4f7e5d050 100644
--- a/src/core/hle/ipc.h
+++ b/src/core/hle/ipc.h
@@ -18,12 +18,26 @@ static const int kCommandHeaderOffset = 0x80; ///< Offset into command buffer of
* 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
+ * @param offset Optional offset into command buffer (in bytes)
* @return Pointer to command buffer
*/
inline u32* GetCommandBuffer(const int offset = 0) {
return (u32*)Memory::GetPointer(GetCurrentThread()->GetTLSAddress() + kCommandHeaderOffset +
offset);
}
+
+static const int kStaticBuffersOffset =
+ 0x100; ///< Offset into static buffers, relative to command buffer header
+
+/**
+ * Returns a pointer to the static buffers area in the current thread's TLS
+ * TODO(Subv): cf. GetCommandBuffer
+ * @param offset Optional offset into static buffers area (in bytes)
+ * @return Pointer to static buffers area
+ */
+inline u32* GetStaticBuffers(const int offset = 0) {
+ return GetCommandBuffer(kStaticBuffersOffset + offset);
+}
}
namespace IPC {
@@ -40,35 +54,34 @@ enum DescriptorType : u32 {
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);
-}
-
union Header {
u32 raw;
BitField<0, 6, u32> translate_params_size;
- BitField<6, 6, u32> normal_params;
+ BitField<6, 6, u32> normal_params_size;
BitField<16, 16, u32> command_id;
};
-inline Header ParseHeader(u32 header) {
- return {header};
+/**
+* @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 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_size is equivalent to the number of normal parameters,
+* #translate_params_size includes the size occupied by the translate parameters headers.
+*/
+inline u32 MakeHeader(u16 command_id, unsigned int normal_params_size,
+ unsigned int translate_params_size) {
+ Header header;
+ header.command_id.Assign(command_id);
+ header.normal_params_size.Assign(normal_params_size);
+ header.translate_params_size.Assign(translate_params_size);
+ return header.raw;
}
constexpr u32 MoveHandleDesc(u32 num_handles = 1) {
@@ -83,7 +96,7 @@ constexpr u32 CallingPidDesc() {
return CallingPid;
}
-constexpr bool isHandleDescriptor(u32 descriptor) {
+constexpr bool IsHandleDescriptor(u32 descriptor) {
return (descriptor & 0xF) == 0x0;
}
@@ -91,30 +104,31 @@ constexpr u32 HandleNumberFromDesc(u32 handle_descriptor) {
return (handle_descriptor >> 26) + 1;
}
-constexpr u32 StaticBufferDesc(u32 size, u8 buffer_id) {
- return StaticBuffer | (size << 14) | ((buffer_id & 0xF) << 10);
-}
-
union StaticBufferDescInfo {
u32 raw;
+ BitField<0, 4, u32> descriptor_type;
BitField<10, 4, u32> buffer_id;
BitField<14, 18, u32> size;
};
-inline StaticBufferDescInfo ParseStaticBufferDesc(const u32 desc) {
- return {desc};
+inline u32 StaticBufferDesc(u32 size, u8 buffer_id) {
+ StaticBufferDescInfo info;
+ info.descriptor_type.Assign(StaticBuffer);
+ info.buffer_id.Assign(buffer_id);
+ info.size.Assign(size);
+ return info.raw;
}
/**
- * @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.
- */
+* @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)
@@ -122,29 +136,30 @@ inline u32 PXIBufferDesc(u32 size, unsigned buffer_id, bool is_read_only) {
return type | (size << 8) | ((buffer_id & 0xF) << 4);
}
-enum MappedBufferPermissions {
+enum MappedBufferPermissions : u32 {
R = 1,
W = 2,
RW = R | W,
};
-constexpr u32 MappedBufferDesc(u32 size, MappedBufferPermissions perms) {
- return MappedBuffer | (size << 4) | (u32(perms) << 1);
-}
-
union MappedBufferDescInfo {
u32 raw;
- BitField<4, 28, u32> size;
+ BitField<0, 4, u32> flags;
BitField<1, 2, MappedBufferPermissions> perms;
+ BitField<4, 28, u32> size;
};
-inline MappedBufferDescInfo ParseMappedBufferDesc(const u32 desc) {
- return {desc};
+inline u32 MappedBufferDesc(u32 size, MappedBufferPermissions perms) {
+ MappedBufferDescInfo info;
+ info.flags.Assign(MappedBuffer);
+ info.perms.Assign(perms);
+ info.size.Assign(size);
+ return info.raw;
}
inline DescriptorType GetDescriptorType(u32 descriptor) {
// Note: Those checks must be done in this order
- if (isHandleDescriptor(descriptor))
+ if (IsHandleDescriptor(descriptor))
return (DescriptorType)(descriptor & 0x30);
// handle the fact that the following descriptors can have rights
diff --git a/src/core/hle/ipc_helpers.h b/src/core/hle/ipc_helpers.h
new file mode 100644
index 000000000..6089c39c7
--- /dev/null
+++ b/src/core/hle/ipc_helpers.h
@@ -0,0 +1,259 @@
+// Copyright 2016 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+#include "core/hle/ipc.h"
+#include "core/hle/kernel/kernel.h"
+
+namespace IPC {
+
+class RequestHelperBase {
+protected:
+ u32* cmdbuf;
+ ptrdiff_t index = 1;
+ Header header;
+
+public:
+ RequestHelperBase(u32* command_buffer, Header command_header)
+ : cmdbuf(command_buffer), header(command_header) {}
+
+ /// Returns the total size of the request in words
+ size_t TotalSize() const {
+ return 1 /* command header */ + header.normal_params_size + header.translate_params_size;
+ }
+
+ void ValidateHeader() {
+ DEBUG_ASSERT_MSG(index == TotalSize(), "Operations do not match the header (cmd 0x%x)",
+ header.raw);
+ }
+};
+
+class RequestBuilder : public RequestHelperBase {
+public:
+ RequestBuilder(u32* command_buffer, Header command_header)
+ : RequestHelperBase(command_buffer, command_header) {
+ cmdbuf[0] = header.raw;
+ }
+ explicit RequestBuilder(u32* command_buffer, u32 command_header)
+ : RequestBuilder(command_buffer, Header{command_header}) {}
+ RequestBuilder(u32* command_buffer, u16 command_id, unsigned normal_params_size,
+ unsigned translate_params_size)
+ : RequestBuilder(command_buffer,
+ MakeHeader(command_id, normal_params_size, translate_params_size)) {}
+
+ // Validate on destruction, as there shouldn't be any case where we don't want it
+ ~RequestBuilder() {
+ ValidateHeader();
+ }
+
+ template <typename T>
+ void Push(T value);
+
+ template <>
+ void Push(u32);
+
+ template <typename First, class... Other>
+ void Push(First first_value, const Other&... other_values) {
+ Push(first_value);
+ Push(other_values...);
+ }
+
+ /**
+ * @brief Copies the content of the given trivially copyable class to the buffer as a normal
+ * param
+ * @note: The input class must be correctly packed/padded to fit hardware layout.
+ */
+ template <typename T>
+ void PushRaw(const T& value) {
+ static_assert(std::is_trivially_copyable<T>(), "Raw types should be trivially copyable");
+ std::memcpy(cmdbuf + index, &value, sizeof(T));
+ index += (sizeof(T) + 3) / 4; // round up to word length
+ }
+
+ // TODO : ensure that translate params are added after all regular params
+ template <typename... H>
+ void PushCopyHandles(H... handles) {
+ Push(CopyHandleDesc(sizeof...(H)));
+ Push(static_cast<Kernel::Handle>(handles)...);
+ }
+
+ template <typename... H>
+ void PushMoveHandles(H... handles) {
+ Push(MoveHandleDesc(sizeof...(H)));
+ Push(static_cast<Kernel::Handle>(handles)...);
+ }
+
+ void PushCurrentPIDHandle() {
+ Push(CallingPidDesc());
+ Push<u32>(0);
+ }
+
+ void PushStaticBuffer(VAddr buffer_vaddr, u32 size, u8 buffer_id) {
+ Push(StaticBufferDesc(size, buffer_id));
+ Push(buffer_vaddr);
+ }
+
+ void PushMappedBuffer(VAddr buffer_vaddr, u32 size, MappedBufferPermissions perms) {
+ Push(MappedBufferDesc(size, perms));
+ Push(buffer_vaddr);
+ }
+};
+
+class RequestParser : public RequestHelperBase {
+public:
+ RequestParser(u32* command_buffer, Header command_header)
+ : RequestHelperBase(command_buffer, command_header) {}
+ explicit RequestParser(u32* command_buffer, u32 command_header)
+ : RequestParser(command_buffer, Header{command_header}) {}
+ RequestParser(u32* command_buffer, u16 command_id, unsigned normal_params_size,
+ unsigned translate_params_size)
+ : RequestParser(command_buffer,
+ MakeHeader(command_id, normal_params_size, translate_params_size)) {}
+
+ RequestBuilder MakeBuilder(u32 normal_params_size, u32 translate_params_size,
+ bool validateHeader = true) {
+ if (validateHeader)
+ ValidateHeader();
+ Header builderHeader{
+ MakeHeader(header.command_id, normal_params_size, translate_params_size)};
+ return {cmdbuf, builderHeader};
+ }
+
+ template <typename T>
+ T Pop();
+
+ template <>
+ u32 Pop<u32>();
+
+ template <typename T>
+ void Pop(T& value) {
+ value = Pop<T>();
+ }
+
+ template <typename First, class... Other>
+ void Pop(First& first_value, Other&... other_values) {
+ first_value = Pop<First>();
+ Pop(other_values...);
+ }
+
+ Kernel::Handle PopHandle() {
+ const u32 handle_descriptor = Pop<u32>();
+ DEBUG_ASSERT_MSG(IsHandleDescriptor(handle_descriptor),
+ "Tried to pop handle(s) but the descriptor is not a handle descriptor");
+ DEBUG_ASSERT_MSG(HandleNumberFromDesc(handle_descriptor) == 1,
+ "Descriptor indicates that there isn't exactly one handle");
+ return Pop<Kernel::Handle>();
+ }
+
+ template <typename... H>
+ void PopHandles(H&... handles) {
+ const u32 handle_descriptor = Pop<u32>();
+ const int handles_number = sizeof...(H);
+ DEBUG_ASSERT_MSG(IsHandleDescriptor(handle_descriptor),
+ "Tried to pop handle(s) but the descriptor is not a handle descriptor");
+ DEBUG_ASSERT_MSG(handles_number == HandleNumberFromDesc(handle_descriptor),
+ "Number of handles doesn't match the descriptor");
+ Pop(static_cast<Kernel::Handle&>(handles)...);
+ }
+
+ /**
+ * @brief Pops the static buffer vaddr
+ * @return The virtual address of the buffer
+ * @param[out] data_size If non-null, the pointed value will be set to the size of the data
+ * @param[out] useStaticBuffersToGetVaddr Indicates if we should read the vaddr from the static
+ * buffers (which is the correct thing to do, but no service presently implement it) instead of
+ * using the same value as the process who sent the request
+ * given by the source process
+ *
+ * Static buffers must be set up before any IPC request using those is sent.
+ * It is the duty of the process (usually services) to allocate and set up the receiving static
+ * buffer information
+ * Please note that the setup uses virtual addresses.
+ */
+ VAddr PopStaticBuffer(size_t* data_size = nullptr, bool useStaticBuffersToGetVaddr = false) {
+ const u32 sbuffer_descriptor = Pop<u32>();
+ StaticBufferDescInfo bufferInfo{sbuffer_descriptor};
+ if (data_size != nullptr)
+ *data_size = bufferInfo.size;
+ if (!useStaticBuffersToGetVaddr)
+ return Pop<VAddr>();
+ else {
+ ASSERT_MSG(0, "remove the assert if multiprocess/IPC translation are implemented.");
+ // The buffer has already been copied to the static buffer by the kernel during
+ // translation
+ Pop<VAddr>(); // Pop the calling process buffer address
+ // and get the vaddr from the static buffers
+ return cmdbuf[(0x100 >> 2) + bufferInfo.buffer_id * 2 + 1];
+ }
+ }
+
+ /**
+ * @brief Pops the mapped buffer vaddr
+ * @return The virtual address of the buffer
+ * @param[out] data_size If non-null, the pointed value will be set to the size of the data
+ * given by the source process
+ * @param[out] buffer_perms If non-null, the pointed value will be set to the permissions of the
+ * buffer
+ */
+ VAddr PopMappedBuffer(size_t* data_size = nullptr,
+ MappedBufferPermissions* buffer_perms = nullptr) {
+ const u32 sbuffer_descriptor = Pop<u32>();
+ MappedBufferDescInfo bufferInfo{sbuffer_descriptor};
+ if (data_size != nullptr)
+ *data_size = bufferInfo.size;
+ if (buffer_perms != nullptr)
+ *buffer_perms = bufferInfo.perms;
+ return Pop<VAddr>();
+ }
+
+ /**
+ * @brief Reads the next normal parameters as a struct, by copying it
+ * @note: The output class must be correctly packed/padded to fit hardware layout.
+ */
+ template <typename T>
+ void PopRaw(T& value) {
+ static_assert(std::is_trivially_copyable<T>(), "Raw types should be trivially copyable");
+ std::memcpy(&value, cmdbuf + index, sizeof(T));
+ index += (sizeof(T) + 3) / 4; // round up to word length
+ }
+};
+
+/// Pop ///
+
+template <>
+inline u32 RequestParser::Pop<u32>() {
+ return cmdbuf[index++];
+}
+
+template <>
+inline u64 RequestParser::Pop<u64>() {
+ const u64 lsw = Pop<u32>();
+ const u64 msw = Pop<u32>();
+ return msw << 32 | lsw;
+}
+
+template <>
+inline ResultCode RequestParser::Pop<ResultCode>() {
+ return ResultCode{Pop<u32>()};
+}
+
+/// Push ///
+
+template <>
+inline void RequestBuilder::Push<u32>(u32 value) {
+ cmdbuf[index++] = value;
+}
+
+template <>
+inline void RequestBuilder::Push<u64>(u64 value) {
+ Push(static_cast<u32>(value));
+ Push(static_cast<u32>(value >> 32));
+}
+
+template <>
+inline void RequestBuilder::Push<ResultCode>(ResultCode value) {
+ Push(value.raw);
+}
+
+} // namespace IPC