Psyqo GPU tweaks

src/mips/psyqo/gpu.hh

@@ -63,10 +63,14 @@ namespace timer_literals {
  * `gpu().armPeriodicTimer(1_s, callback)` will create a timer that
  * fires every second.
  */
-constexpr uint32_t operator""_ns(unsigned long long int value) { return value / 1'000; }
-constexpr uint32_t operator""_us(unsigned long long int value) { return value; }
-constexpr uint32_t operator""_ms(unsigned long long int value) { return value * 1'000; }
-constexpr uint32_t operator""_s(unsigned long long int value) { return value * 1'000'000; }
+consteval uint32_t operator""_ns(unsigned long long int value) { return value / 1'000; }
+consteval uint32_t operator""_us(unsigned long long int value) { return value; }
+consteval uint32_t operator""_ms(unsigned long long int value) { return value * 1'000; }
+consteval uint32_t operator""_s(unsigned long long int value) { return value * 1'000'000; }
+consteval uint32_t operator""_ns(long double value) { return value / 1'000; }
+consteval uint32_t operator""_us(long double value) { return value; }
+consteval uint32_t operator""_ms(long double value) { return value * 1'000; }
+consteval uint32_t operator""_s(long double value) { return value * 1'000'000; }
 
 }  // namespace timer_literals
 
@@ -85,6 +89,7 @@ class GPU {
     enum class VideoMode { AUTO, NTSC, PAL };
     enum class ColorMode { C15BITS, C24BITS };
     enum class Interlace { PROGRESSIVE, INTERLACED };
+    enum class MiscSetting { CLEAR_VRAM, KEEP_VRAM };
     void initialize(const Configuration &config);
 
     static constexpr uint32_t US_PER_HBLANK = 64;

src/mips/psyqo/internal/gpu/configuration.hh

@@ -80,6 +80,17 @@ struct psyqo::GPU::Configuration {
         config.vResolution = interlace == Interlace::INTERLACED ? VR_480 : VR_240;
         return *this;
     }
+    Configuration &set(MiscSetting setting) {
+        switch (setting) {
+            case MiscSetting::CLEAR_VRAM:
+                clearVRAM = true;
+                break;
+            case MiscSetting::KEEP_VRAM:
+                clearVRAM = false;
+                break;
+        }
+        return *this;
+    }
 
   private:
     enum HResolution {
@@ -125,5 +136,7 @@ struct psyqo::GPU::Configuration {
     };
 
     DisplayModeConfig config = {};
+    bool clearVRAM = true;
+
     friend class GPU;
 };

src/mips/psyqo/src/gpu.cpp

@@ -117,9 +117,11 @@
     syscall_enableEvent(event);
     syscall_enableTimerIRQ(3);
     syscall_setTimerAutoAck(3, 1);
-    Prim::FastFill ff;
-    ff.rect = Rect{0, 0, 1024, 512};
-    sendPrimitive(ff);
+    if (config.clearVRAM) {
+        Prim::FastFill ff;
+        ff.rect = Rect{0, 0, 1024, 512};
+        sendPrimitive(ff);
+    }
     // Enable Display
     Hardware::GPU::Ctrl = 0x03000000;
     Kernel::enableDma(Kernel::DMA::GPU);