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DSP: Create backing memory for entire DSP RAM

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Also move address space mapping out of video_core.
This commit is contained in:
Yuri Kunde Schlesner 2017-04-30 21:36:00 -07:00
parent 2af0a2a4b7
commit 03ad0ec0e5
5 changed files with 42 additions and 32 deletions
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14
src/audio_core/hle/dsp.cpp
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@ -16,31 +16,33 @@ namespace HLE {
// Region management
std::array<SharedMemory, 2> g_regions;
DspMemory g_dsp_memory;
static size_t CurrentRegionIndex() {
// The region with the higher frame counter is chosen unless there is wraparound.
// This function only returns a 0 or 1.
u16 frame_counter_0 = g_dsp_memory.region_0.frame_counter;
u16 frame_counter_1 = g_dsp_memory.region_1.frame_counter;
if (g_regions[0].frame_counter == 0xFFFFu && g_regions[1].frame_counter != 0xFFFEu) {
if (frame_counter_0 == 0xFFFFu && frame_counter_1 != 0xFFFEu) {
// Wraparound has occurred.
return 1;
}
if (g_regions[1].frame_counter == 0xFFFFu && g_regions[0].frame_counter != 0xFFFEu) {
if (frame_counter_1 == 0xFFFFu && frame_counter_0 != 0xFFFEu) {
// Wraparound has occurred.
return 0;
}
return (g_regions[0].frame_counter > g_regions[1].frame_counter) ? 0 : 1;
return (frame_counter_0 > frame_counter_1) ? 0 : 1;
}
static SharedMemory& ReadRegion() {
return g_regions[CurrentRegionIndex()];
return CurrentRegionIndex() == 0 ? g_dsp_memory.region_0 : g_dsp_memory.region_1;
}
static SharedMemory& WriteRegion() {
return g_regions[1 - CurrentRegionIndex()];
return CurrentRegionIndex() != 0 ? g_dsp_memory.region_0 : g_dsp_memory.region_1;
}
// Audio processing and mixing