/**
* Signals that the specified interrupt type has occurred to userland code
* @param interrupt_id ID of interrupt that is being signalled
* @todo This should probably take a thread_id parameter and only signal this thread?
* @todo This probably does not belong in the GSP module, instead move to video_core
*/
void SignalInterrupt(InterruptId interrupt_id) {
if (0 == g_interrupt_event) {
LOG_WARNING(Service_GSP, "cannot synchronize until GSP event has been created!");
return;
}
if (nullptr == g_shared_memory) {
LOG_WARNING(Service_GSP, "cannot synchronize until GSP shared memory has been created!");
return;
}
for (int thread_id = 0; thread_id < 0x4; ++thread_id) {
InterruptRelayQueue* interrupt_relay_queue = GetInterruptRelayQueue(thread_id);
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->number_interrupts += 1;
interrupt_relay_queue->slot[next] = interrupt_id;
interrupt_relay_queue->error_code = 0x0; // No error
// Update framebuffer information if requested
// TODO(yuriks): Confirm where this code should be called. It is definitely updated without
// executing any GSP commands, only waiting on the event.
int screen_id = (interrupt_id == InterruptId::PDC0) ? 0 : (interrupt_id == InterruptId::PDC1) ? 1 : -1;
if (screen_id != -1) {
FrameBufferUpdate* info = GetFrameBufferInfo(thread_id, screen_id);
if (info->is_dirty) {
SetBufferSwap(screen_id, info->framebuffer_info[info->index]);
info->is_dirty = false;
}
}
}
g_interrupt_event->Signal();
}
/**
* GSP_GPU::SetBufferSwap service function
*
* Updates GPU display framebuffer configuration using the specified parameters.
*
* Inputs:
* 1 : Screen ID (0 = top screen, 1 = bottom screen)
* 2-7 : FrameBufferInfo structure
* Outputs:
* 1: Result code
*/
static void SetBufferSwap(Service::Interface* self) {
u32* cmd_buff = Kernel::GetCommandBuffer();
u32 screen_id = cmd_buff[1];
FrameBufferInfo* fb_info = (FrameBufferInfo*)&cmd_buff[2];
SetBufferSwap(screen_id, *fb_info);
cmd_buff[1] = 0; // No error
}
/// Executes the next GSP command
static void ExecuteCommand(const Command& command, u32 thread_id) {
// Utility function to convert register ID to address
auto WriteGPURegister = [](u32 id, u32 data) {
GPU::Write<u32>(0x1EF00000 + 4 * id, data);
};
switch (command.id) {
// GX request DMA - typically used for copying memory from GSP heap to VRAM
case CommandId::REQUEST_DMA:
memcpy(Memory::GetPointer(command.dma_request.dest_address),
Memory::GetPointer(command.dma_request.source_address),
command.dma_request.size);
SignalInterrupt(InterruptId::DMA);
break;
// ctrulib homebrew sends all relevant command list data with this command,
// hence we do all "interesting" stuff here and do nothing in SET_COMMAND_LIST_FIRST.
// TODO: This will need some rework in the future.
case CommandId::SET_COMMAND_LIST_LAST:
{
auto& params = command.set_command_list_last;
WriteGPURegister(GPU_REG_INDEX(command_processor_config.address), Memory::VirtualToPhysicalAddress(params.address) >> 3);
WriteGPURegister(GPU_REG_INDEX(command_processor_config.size), params.size);
// TODO: Not sure if we are supposed to always write this .. seems to trigger processing though
WriteGPURegister(GPU_REG_INDEX(command_processor_config.trigger), 1);
break;
}
// It's assumed that the two "blocks" behave equivalently.
// Presumably this is done simply to allow two memory fills to run in parallel.
case CommandId::SET_MEMORY_FILL:
{
auto& params = command.memory_fill;
WriteGPURegister(GPU_REG_INDEX(memory_fill_config[0].address_start), Memory::VirtualToPhysicalAddress(params.start1) >> 3);
WriteGPURegister(GPU_REG_INDEX(memory_fill_config[0].address_end), Memory::VirtualToPhysicalAddress(params.end1) >> 3);
WriteGPURegister(GPU_REG_INDEX(memory_fill_config[0].size), params.end1 - params.start1);
WriteGPURegister(GPU_REG_INDEX(memory_fill_config[0].value), params.value1);
WriteGPURegister(GPU_REG_INDEX(memory_fill_config[1].address_start), Memory::VirtualToPhysicalAddress(params.start2) >> 3);
WriteGPURegister(GPU_REG_INDEX(memory_fill_config[1].address_end), Memory::VirtualToPhysicalAddress(params.end2) >> 3);
WriteGPURegister(GPU_REG_INDEX(memory_fill_config[1].size), params.end2 - params.start2);
WriteGPURegister(GPU_REG_INDEX(memory_fill_config[1].value), params.value2);
SignalInterrupt(InterruptId::PSC0);
break;
}
case CommandId::SET_DISPLAY_TRANSFER:
{
auto& params = command.image_copy;
WriteGPURegister(GPU_REG_INDEX(display_transfer_config.input_address), Memory::VirtualToPhysicalAddress(params.in_buffer_address) >> 3);
WriteGPURegister(GPU_REG_INDEX(display_transfer_config.output_address), Memory::VirtualToPhysicalAddress(params.out_buffer_address) >> 3);
WriteGPURegister(GPU_REG_INDEX(display_transfer_config.input_size), params.in_buffer_size);
WriteGPURegister(GPU_REG_INDEX(display_transfer_config.output_size), params.out_buffer_size);
WriteGPURegister(GPU_REG_INDEX(display_transfer_config.flags), params.flags);
WriteGPURegister(GPU_REG_INDEX(display_transfer_config.trigger), 1);
// TODO(bunnei): Determine if these interrupts should be signalled here.
SignalInterrupt(InterruptId::PSC1);
SignalInterrupt(InterruptId::PPF);
// Update framebuffer information if requested
for (int screen_id = 0; screen_id < 2; ++screen_id) {
FrameBufferUpdate* info = GetFrameBufferInfo(thread_id, screen_id);
if (info->is_dirty)
SetBufferSwap(screen_id, info->framebuffer_info[info->index]);
info->is_dirty = false;
}
break;
}
// TODO: Check if texture copies are implemented correctly..
case CommandId::SET_TEXTURE_COPY:
{
auto& params = command.image_copy;
WriteGPURegister(GPU_REG_INDEX(display_transfer_config.input_address), Memory::VirtualToPhysicalAddress(params.in_buffer_address) >> 3);
WriteGPURegister(GPU_REG_INDEX(display_transfer_config.output_address), Memory::VirtualToPhysicalAddress(params.out_buffer_address) >> 3);
WriteGPURegister(GPU_REG_INDEX(display_transfer_config.input_size), params.in_buffer_size);
WriteGPURegister(GPU_REG_INDEX(display_transfer_config.output_size), params.out_buffer_size);
WriteGPURegister(GPU_REG_INDEX(display_transfer_config.flags), params.flags);
// TODO: Should this register be set to 1 or should instead its value be OR-ed with 1?
WriteGPURegister(GPU_REG_INDEX(display_transfer_config.trigger), 1);
break;
}
// TODO: Figure out what exactly SET_COMMAND_LIST_FIRST and SET_COMMAND_LIST_LAST
// are supposed to do.
case CommandId::SET_COMMAND_LIST_FIRST:
{
break;
}
default:
ERROR_LOG(GSP, "unknown command 0x%08X", (int)command.id.Value());
}
}
