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GSP: Cleaned up command buffer decoding.

Browse source 
GSP: Cleaned up code and added additional comments.

GSP: Removed unnecessary TODO comment.

GSP: Changed u32 iterators in TriggerCmdReqQueue to unsigned.
This commit is contained in:
bunnei 2014-07-23 00:10:37 -04:00
parent 36fd1c169e
commit cad2f21985
2 changed files with 68 additions and 60 deletions
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82
src/core/hle/service/gsp.cpp
View file

@ -23,21 +23,23 @@ GraphicsDebugger g_debugger;
namespace GSP_GPU {
Handle g_event = 0;
Handle g_shared_memory = 0;
Handle g_interrupt_event = 0; ///< Handle to event triggered when GSP interrupt has been signalled
Handle g_shared_memory = 0; ///< Handle to GSP shared memorys
u32 g_thread_id = 1; ///< Thread index into interrupt relay queue, 1 is arbitrary
u32 g_thread_id = 1;
/// Gets a pointer to a thread command buffer in GSP shared memory
static inline u8* GetCommandBuffer(u32 thread_id) {
if (0 == g_shared_memory)
return nullptr;
/// Gets a pointer to the start (header) of a command buffer in GSP shared memory
static inline u8* GetCmdBufferPointer(u32 thread_id, u32 offset=0) {
if (0 == g_shared_memory) return nullptr;
return Kernel::GetSharedMemoryPointer(g_shared_memory, 0x800 + (thread_id * 0x200) + offset);
return Kernel::GetSharedMemoryPointer(g_shared_memory,
0x800 + (thread_id * sizeof(CommandBuffer)));
}
/// Gets a pointer to the start (header) of a command buffer in GSP shared memory
static inline InterruptQueue* GetInterruptQueue(u32 thread_id) {
return (InterruptQueue*)Kernel::GetSharedMemoryPointer(g_shared_memory, sizeof(InterruptQueue) * thread_id);
/// Gets a pointer to the interrupt relay queue for a given thread index
static inline InterruptRelayQueue* GetInterruptRelayQueue(u32 thread_id) {
return (InterruptRelayQueue*)Kernel::GetSharedMemoryPointer(g_shared_memory,
sizeof(InterruptRelayQueue) * thread_id);
}
/// Write a GSP GPU hardware register
@ -111,15 +113,15 @@ void ReadHWRegs(Service::Interface* self) {
void RegisterInterruptRelayQueue(Service::Interface* self) {
u32* cmd_buff = Service::GetCommandBuffer();
u32 flags = cmd_buff[1];
g_event = cmd_buff[3];
g_interrupt_event = cmd_buff[3];
g_shared_memory = Kernel::CreateSharedMemory("GSPSharedMem");
_assert_msg_(GSP, (g_event != 0), "handle is not valid!");
_assert_msg_(GSP, (g_interrupt_event != 0), "handle is not valid!");
cmd_buff[2] = g_thread_id++; // ThreadID
cmd_buff[4] = g_shared_memory; // GSP shared memory
Kernel::SignalEvent(GSP_GPU::g_event); // TODO(bunnei): Is this correct?
Kernel::SignalEvent(g_interrupt_event); // TODO(bunnei): Is this correct?
}
/**
@ -127,7 +129,7 @@ void RegisterInterruptRelayQueue(Service::Interface* self) {
* @param interrupt_id ID of interrupt that is being signalled
*/
void SignalInterrupt(InterruptId interrupt_id) {
if (0 == GSP_GPU::g_event) {
if (0 == g_interrupt_event) {
WARN_LOG(GSP, "cannot synchronize until GSP event has been created!");
return;
}
@ -136,34 +138,26 @@ void SignalInterrupt(InterruptId interrupt_id) {
return;
}
for (int thread_id = 0; thread_id < 0x4; ++thread_id) {
InterruptQueue* interrupt_queue = GetInterruptQueue(thread_id);
interrupt_queue->number_interrupts = interrupt_queue->number_interrupts + 1;
u8 next = interrupt_queue->index;
next += interrupt_queue->number_interrupts;
next = next % 0x34;
InterruptRelayQueue* interrupt_relay_queue = GetInterruptRelayQueue(thread_id);
interrupt_relay_queue->number_interrupts = interrupt_relay_queue->number_interrupts + 1;
interrupt_queue->slot[next] = interrupt_id;
interrupt_queue->error_code = 0x0; // No error
u8 next = interrupt_relay_queue->index;
next += interrupt_relay_queue->number_interrupts;
next = next % 0x34; // 0x34 is the number of interrupt slots
interrupt_relay_queue->slot[next] = interrupt_id;
interrupt_relay_queue->error_code = 0x0; // No error
}
Kernel::SignalEvent(GSP_GPU::g_event);
Kernel::SignalEvent(g_interrupt_event);
}
/// Executes the next GSP command
void ExecuteCommand(u32 thread_id, u32 command_index) {
void ExecuteCommand(const Command& command) {
// Utility function to convert register ID to address
auto WriteGPURegister = [](u32 id, u32 data) {
GPU::Write<u32>(0x1EF00000 + 4 * id, data);
};
CmdBufferHeader* header = (CmdBufferHeader*)GetCmdBufferPointer(thread_id);
auto& command = *(const Command*)GetCmdBufferPointer(thread_id, (command_index + 1) * 0x20);
g_debugger.GXCommandProcessed(GetCmdBufferPointer(thread_id, 0x20 + (header->index * 0x20)));
NOTICE_LOG(GSP, "decoding command 0x%08X", (int)command.id.Value());
switch (command.id) {
// GX request DMA - typically used for copying memory from GSP heap to VRAM
@ -181,7 +175,9 @@ void ExecuteCommand(u32 thread_id, u32 command_index) {
auto& params = command.set_command_list_last;
WriteGPURegister(GPU::Regs::CommandProcessor + 2, params.address >> 3);
WriteGPURegister(GPU::Regs::CommandProcessor, params.size >> 3);
WriteGPURegister(GPU::Regs::CommandProcessor + 4, 1); // TODO: Not sure if we are supposed to always write this .. seems to trigger processing though
// TODO: Not sure if we are supposed to always write this .. seems to trigger processing though
WriteGPURegister(GPU::Regs::CommandProcessor + 4, 1);
// TODO: Move this to GPU
// TODO: Not sure what units the size is measured in
@ -246,20 +242,24 @@ void ExecuteCommand(u32 thread_id, u32 command_index) {
default:
ERROR_LOG(GSP, "unknown command 0x%08X", (int)command.id.Value());
}
header->number_commands = header->number_commands - 1; // Indicates that command has completed
}
/// This triggers handling of the GX command written to the command buffer in shared memory.
void TriggerCmdReqQueue(Service::Interface* self) {
// Iterate through each thread's command queue...
for (u32 thread_id = 0; thread_id < 0x4; ++thread_id) {
CmdBufferHeader* header = (CmdBufferHeader*)GetCmdBufferPointer(thread_id);
for (unsigned thread_id = 0; thread_id < 0x4; ++thread_id) {
CommandBuffer* command_buffer = (CommandBuffer*)GetCommandBuffer(thread_id);
// Iterate through each command...
for (u32 command_index = 0; command_index < header->number_commands; ++command_index) {
ExecuteCommand(thread_id, command_index);
for (unsigned i = 0; i < command_buffer->number_commands; ++i) {
g_debugger.GXCommandProcessed((u8*)&command_buffer->commands[i]);
// Decode and execute command
ExecuteCommand(command_buffer->commands[i]);
// Indicates that command has completed
command_buffer->number_commands = command_buffer->number_commands - 1;
}
}
}
@ -303,7 +303,7 @@ const Interface::FunctionInfo FunctionTable[] = {
Interface::Interface() {
Register(FunctionTable, ARRAY_SIZE(FunctionTable));
g_event = 0;
g_interrupt_event = 0;
g_shared_memory = 0;
g_thread_id = 1;
}

46
src/core/hle/service/gsp.h
View file

@ -41,8 +41,8 @@ enum class CommandId : u32 {
SET_COMMAND_LIST_FIRST = 0x05,
};
/// GSP thread interrupt queue header
struct InterruptQueue {
/// GSP thread interrupt relay queue
struct InterruptRelayQueue {
union {
u32 hex;
@ -61,23 +61,8 @@ struct InterruptQueue {
InterruptId slot[0x34]; ///< Interrupt ID slots
};
static_assert(sizeof(InterruptQueue) == 0x40, "InterruptQueue struct has incorrect size");
/// GSP shared memory GX command buffer header
union CmdBufferHeader {
u32 hex;
// Current command index. This index is updated by GSP module after loading the command data,
// right before the command is processed. When this index is updated by GSP module, the total
// commands field is decreased by one as well.
BitField<0,8,u32> index;
// Total commands to process, must not be value 0 when GSP module handles commands. This must be
// <=15 when writing a command to shared memory. This is incremented by the application when
// writing a command to shared memory, after increasing this value TriggerCmdReqQueue is only
// used if this field is value 1.
BitField<8,8,u32> number_commands;
};
static_assert(sizeof(InterruptRelayQueue) == 0x40,
"InterruptRelayQueue struct has incorrect size");
/// GSP command
struct Command {
@ -117,6 +102,29 @@ struct Command {
};
static_assert(sizeof(Command) == 0x20, "Command struct has incorrect size");
/// GSP shared memory GX command buffer header
struct CommandBuffer {
union {
u32 hex;
// Current command index. This index is updated by GSP module after loading the command
// data, right before the command is processed. When this index is updated by GSP module,
// the total commands field is decreased by one as well.
BitField<0,8,u32> index;
// Total commands to process, must not be value 0 when GSP module handles commands. This
// must be <=15 when writing a command to shared memory. This is incremented by the
// application when writing a command to shared memory, after increasing this value
// TriggerCmdReqQueue is only used if this field is value 1.
BitField<8,8,u32> number_commands;
};
u32 unk[7];
Command commands[0xF];
};
static_assert(sizeof(CommandBuffer) == 0x200, "CommandBuffer struct has incorrect size");
/// Interface to "srv:" service
class Interface : public Service::Interface {
public: