1 files changed, 20 insertions, 16 deletions

diff --git a/src/common/wall_clock.h b/src/common/wall_clock.h
index fcfdd637c..f45d3d8c5 100644
--- a/src/common/wall_clock.h
+++ b/src/common/wall_clock.h
@@ -13,8 +13,9 @@ namespace Common {
 
 class WallClock {
 public:
-    static constexpr u64 CNTFRQ = 19'200'000;       // CNTPCT_EL0 Frequency = 19.2 MHz
-    static constexpr u64 GPUTickFreq = 614'400'000; // GM20B GPU Tick Frequency = 614.4 MHz
+    static constexpr u64 CNTFRQ = 19'200'000;         // CNTPCT_EL0 Frequency = 19.2 MHz
+    static constexpr u64 GPUTickFreq = 614'400'000;   // GM20B GPU Tick Frequency = 614.4 MHz
+    static constexpr u64 CPUTickFreq = 1'020'000'000; // T210/4 A57 CPU Tick Frequency = 1020.0 MHz
 
     virtual ~WallClock() = default;
 
@@ -46,28 +47,26 @@ public:
         return ns * NsToCNTPCTRatio::num / NsToCNTPCTRatio::den;
     }
 
-    static inline u64 USToCNTPCT(u64 us) {
-        return us * UsToCNTPCTRatio::num / UsToCNTPCTRatio::den;
-    }
-
     static inline u64 NSToGPUTick(u64 ns) {
         return ns * NsToGPUTickRatio::num / NsToGPUTickRatio::den;
     }
 
-    static inline u64 CNTPCTToNS(u64 cntpct) {
-        return cntpct * NsToCNTPCTRatio::den / NsToCNTPCTRatio::num;
+    // Cycle Timing
+
+    static inline u64 CPUTickToNS(u64 cpu_tick) {
+        return cpu_tick * CPUTickToNsRatio::num / CPUTickToNsRatio::den;
     }
 
-    static inline u64 CNTPCTToUS(u64 cntpct) {
-        return cntpct * UsToCNTPCTRatio::den / UsToCNTPCTRatio::num;
+    static inline u64 CPUTickToUS(u64 cpu_tick) {
+        return cpu_tick * CPUTickToUsRatio::num / CPUTickToUsRatio::den;
     }
 
-    static inline u64 GPUTickToNS(u64 gpu_tick) {
-        return gpu_tick * NsToGPUTickRatio::den / NsToGPUTickRatio::num;
+    static inline u64 CPUTickToCNTPCT(u64 cpu_tick) {
+        return cpu_tick * CPUTickToCNTPCTRatio::num / CPUTickToCNTPCTRatio::den;
     }
 
-    static inline u64 CNTPCTToGPUTick(u64 cntpct) {
-        return cntpct * CNTPCTToGPUTickRatio::num / CNTPCTToGPUTickRatio::den;
+    static inline u64 CPUTickToGPUTick(u64 cpu_tick) {
+        return cpu_tick * CPUTickToGPUTickRatio::num / CPUTickToGPUTickRatio::den;
     }
 
 protected:
@@ -78,9 +77,14 @@ protected:
     using NsToUsRatio = std::ratio_divide<std::nano, std::micro>;
     using NsToMsRatio = std::ratio_divide<std::nano, std::milli>;
     using NsToCNTPCTRatio = std::ratio<CNTFRQ, std::nano::den>;
-    using UsToCNTPCTRatio = std::ratio<CNTFRQ, std::micro::den>;
     using NsToGPUTickRatio = std::ratio<GPUTickFreq, std::nano::den>;
-    using CNTPCTToGPUTickRatio = std::ratio<GPUTickFreq, CNTFRQ>;
+
+    // Cycle Timing
+
+    using CPUTickToNsRatio = std::ratio<std::nano::den, CPUTickFreq>;
+    using CPUTickToUsRatio = std::ratio<std::micro::den, CPUTickFreq>;
+    using CPUTickToCNTPCTRatio = std::ratio<CNTFRQ, CPUTickFreq>;
+    using CPUTickToGPUTickRatio = std::ratio<GPUTickFreq, CPUTickFreq>;
 };
 
 std::unique_ptr<WallClock> CreateOptimalClock();