spu: make "simple" interpolation even more simple

[pcsx_rearmed.git] / frontend / pcnt.h

diff --git a/frontend/pcnt.h b/frontend/pcnt.h
index 232ae07..3969aa4 100644 (file)
--- a/frontend/pcnt.h
+++ b/frontend/pcnt.h
@@ -83,6 +83,19 @@ static inline unsigned int pcnt_get(void)
        return val;
 }
 
+static inline void pcnt_init(void)
+{
+#ifdef __ARM_ARCH_7A__
+       int v;
+       asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r"(v));
+       v |= 5; // master enable, ccnt reset
+       v &= ~8; // ccnt divider 0
+       asm volatile("mcr p15, 0, %0, c9, c12, 0" :: "r"(v));
+       // enable cycle counter
+       asm volatile("mcr p15, 0, %0, c9, c12, 1" :: "r"(1<<31));
+#endif
+}
+
 #else
 
 #define pcnt_start(id)