move some gpu status handling to core

this removes need to update each gpu plugin when this stuff is changed

1 files changed, 20 insertions, 0 deletions

diff --git a/libpcsxcore/gpu.h b/libpcsxcore/gpu.h
new file mode 100644
index 0000000..d02dca4
--- /dev/null
+++ b/libpcsxcore/gpu.h
@@ -0,0 +1,20 @@
+
+/*
+ * q: Why bother with GPU stuff in a plugin-based emu core?
+ * a: mostly because of busy bits, we have all the needed timing info
+ *    that GPU plugin doesn't.
+ */
+
+#define PSXGPU_LCF   (1<<31)
+#define PSXGPU_nBUSY (1<<26)
+#define PSXGPU_ILACE (1<<22)
+
+#define HW_GPU_STATUS psxHu32ref(0x1814)
+
+// TODO: handle com too
+#define PSXGPU_TIMING_BITS (PSXGPU_LCF | PSXGPU_nBUSY)
+
+#define gpuSyncPluginSR() { \
+	HW_GPU_STATUS &= PSXGPU_TIMING_BITS; \
+	HW_GPU_STATUS |= GPU_readStatus() & ~PSXGPU_TIMING_BITS; \
+}