diff --git a/trunk/bootrom/build/libraries/init/ARM11/crt0.c b/trunk/bootrom/build/libraries/init/ARM11/crt0.c
index 2aa2163..397c6bb 100644
--- a/trunk/bootrom/build/libraries/init/ARM11/crt0.c
+++ b/trunk/bootrom/build/libraries/init/ARM11/crt0.c
@@ -72,6 +72,16 @@ stupStartHandlerVeneer
         cmpne   r12, #~0
 LSYM(1) beq     BSYM(1)
 
+        //---- enable performance monitor
+        mrc     p15, 0, r0, c15, c12, 0
+        ldr     r1, =HW_C15_PMN_ENABLE | HW_C15_CYCLE_COUNT_RESET | HW_C15_COUNT01_RESET | \
+                    (HW_C15_EVT_INC_EACH_CYCLE << HW_C15_COUNT0_EVT_SFT) | \
+                    (HW_C15_EVT_INC_EACH_CYCLE << HW_C15_COUNT1_EVT_SFT) | \
+                     HW_C15_CYCLE_COUNT_D64
+        orr     r0, r0, r1
+//        bic     r0, r0, #HW_C15_CYCLE_COUNT_D64
+        mcr     p15, 0, r0, c15, c12, 0
+
         //---- check CPU-ID
         mrc     p15,0, r0, c0, c0, 5
         tst     r0, #HW_C0_AP_CPU_ID_MASK
diff --git a/trunk/bootrom/include/brom/os/common/tick.h b/trunk/bootrom/include/brom/os/common/tick.h
index 78aaea8..81f2f99 100644
--- a/trunk/bootrom/include/brom/os/common/tick.h
+++ b/trunk/bootrom/include/brom/os/common/tick.h
@@ -40,14 +40,16 @@ extern  void i_osSetTick( u64 );
 
 //---- conversion tick count <-> real time count
 #ifdef SDK_ARM11
-#define OS_SYSTEM_CLOCK                HW_CPU_CLOCK
+#define OS_TICK_CLOCK                  HW_CPU_CLOCK
+#define OS_TICK_PRESCALE               1
 #define OS_TICK_HI_SHIFT               24               // 2の累乗単位でチック管理するのであれば32は指定できない（ロード値0では割り込みが発生しないため）
 #define OS_TICK_HI_LSB                 (1ULL<<OS_TICK_HI_SHIFT)
 #define OS_TICK_LO_MASK                ((u32)(OS_TICK_HI_LSB-1))
 #define OS_TICK_LO_MSB                 ((u32)(OS_TICK_HI_LSB>>1))
 #define OS_TICK_LO_LIMIT               OS_TICK_HI_LSB
 #else // SDK_ARM9
-#define OS_SYSTEM_CLOCK                HW_SYSTEM_CLOCK
+#define OS_TICK_CLOCK                  HW_SYSTEM_CLOCK
+#define OS_TICK_PRESCALE               64
 #define OS_TICK_HI_SHIFT               16               // ロード値0でも割り込み発生
 #define OS_TICK_HI_LSB                 (1ULL<<OS_TICK_HI_SHIFT)
 #define OS_TICK_LO_MASK                ((u16)(OS_TICK_HI_LSB-1))
@@ -56,104 +58,42 @@ extern  void i_osSetTick( u64 );
 #endif // SDK_ARM9
 
 //---- sec to tick
-#define  OSi_SEC_TO_TICK(    sec, prescale )   ((OSTick)(   (OS_SYSTEM_CLOCK * (u64)(sec)) / (prescale) ))
-#define  OSi_SEC_TO_TICK32(  sec, prescale )   ((OSTick32)( (OS_SYSTEM_CLOCK * (u32)(sec)) / (prescale) ))
+#define  OS_SEC_TO_TICK(    sec )   OSi_SEC_TO_TICK(   sec, OS_TICK_PRESCALE )
+#define  OS_SEC_TO_TICK32(  sec )   OSi_SEC_TO_TICK32( sec, OS_TICK_PRESCALE )
 
-#define  OSi_MSEC_TO_TICK(   msec, prescale )  ((OSTick)(   ((OS_SYSTEM_CLOCK/1000) * (u64)(msec)) / (prescale) ))
-#define  OSi_MSEC_TO_TICK32( msec, prescale )  ((OSTick32)( ((OS_SYSTEM_CLOCK/1000) * (u32)(msec)) / (prescale) ))
+#define  OS_MSEC_TO_TICK(   msec )  OSi_MSEC_TO_TICK(   msec, OS_TICK_PRESCALE )
+#define  OS_MSEC_TO_TICK32( msec )  OSi_MSEC_TO_TICK32( msec, OS_TICK_PRESCALE )
 
-#define  OSi_USEC_TO_TICK(   usec, prescale )  ((OSTick)(   ((OS_SYSTEM_CLOCK/1000) * (u64)(usec)) / ((prescale) * 1000) ))
-#define  OSi_USEC_TO_TICK32( usec, prescale )  ((OSTick32)( ((OS_SYSTEM_CLOCK/1000) * (u32)(usec)) / ((prescale) * 1000) ))
+#define  OS_USEC_TO_TICK(   usec )  OSi_USEC_TO_TICK(   usec, OS_TICK_PRESCALE )
+#define  OS_USEC_TO_TICK32( usec )  OSi_USEC_TO_TICK32( usec, OS_TICK_PRESCALE )
 
-#define  OS_SEC_TO_TICK(    sec )   OSi_SEC_TO_TICK(   sec, 64 )
-#define  OS_SEC_TO_TICK32(  sec )   OSi_SEC_TO_TICK32( sec, 64 )
+#define  OSi_SEC_TO_TICK(    sec, prescale )   ((OSTick)(   (OS_TICK_CLOCK * (u64)(sec)) / (prescale) ))
+#define  OSi_SEC_TO_TICK32(  sec, prescale )   ((OSTick32)( (OS_TICK_CLOCK * (u32)(sec)) / (prescale) ))
 
-#define  OS_MSEC_TO_TICK(   msec )  OSi_MSEC_TO_TICK(   msec, 64 )
-#define  OS_MSEC_TO_TICK32( msec )  OSi_MSEC_TO_TICK32( msec, 64 )
+#define  OSi_MSEC_TO_TICK(   msec, prescale )  ((OSTick)(   ((OS_TICK_CLOCK/1000) * (u64)(msec)) / (prescale) ))
+#define  OSi_MSEC_TO_TICK32( msec, prescale )  ((OSTick32)( ((OS_TICK_CLOCK/1000) * (u32)(msec)) / (prescale) ))
 
-#define  OS_USEC_TO_TICK(   usec )  OSi_USEC_TO_TICK(   usec, 64 )
-#define  OS_USEC_TO_TICK32( usec )  OSi_USEC_TO_TICK32( usec, 64 )
+#define  OSi_USEC_TO_TICK(   usec, prescale )  ((OSTick)(   ((OS_TICK_CLOCK/1000) * (u64)(usec)) / ((prescale) * 1000) ))
+#define  OSi_USEC_TO_TICK32( usec, prescale )  ((OSTick32)( ((OS_TICK_CLOCK/1000) * (u32)(usec)) / ((prescale) * 1000) ))
 
 //---- tick to sec
-#define  OSi_TICK_TO_SEC(    tick, prescale )  ( ((u64)(tick) * (prescale)) / OS_SYSTEM_CLOCK )
-#define  OSi_TICK_TO_SEC32(  tick, prescale )  ( ((u32)(tick) * (prescale)) / OS_SYSTEM_CLOCK )
+#define  OS_TICK_TO_SEC(    tick )  OSi_TICK_TO_SEC(   tick, OS_TICK_PRESCALE )
+#define  OS_TICK_TO_SEC32(  tick )  OSi_TICK_TO_SEC32( tick, OS_TICK_PRESCALE )
 
-#define  OSi_TICK_TO_MSEC(   tick, prescale )  ( ((u64)(tick) * (prescale)) / (OS_SYSTEM_CLOCK/1000) )
-#define  OSi_TICK_TO_MSEC32( tick, prescale )  ( ((u32)(tick) * (prescale)) / (OS_SYSTEM_CLOCK/1000) )
+#define  OS_TICK_TO_MSEC(   tick )  OSi_TICK_TO_MSEC(   tick, OS_TICK_PRESCALE )
+#define  OS_TICK_TO_MSEC32( tick )  OSi_TICK_TO_MSEC32( tick, OS_TICK_PRESCALE )
 
-#define  OSi_TICK_TO_USEC(   tick, prescale )  ( ((u64)(tick) * (prescale) * 1000) / (OS_SYSTEM_CLOCK/1000) )
-#define  OSi_TICK_TO_USEC32( tick, prescale )  ( ((u32)(tick) * (prescale) * 1000) / (OS_SYSTEM_CLOCK/1000) )
+#define  OS_TICK_TO_USEC(   tick )  OSi_TICK_TO_USEC(   tick, OS_TICK_PRESCALE )
+#define  OS_TICK_TO_USEC32( tick )  OSi_TICK_TO_USEC32( tick, OS_TICK_PRESCALE )
 
-#define  OS_TICK_TO_SEC(    tick )  OSi_TICK_TO_SEC(   tick, 64 )
-#define  OS_TICK_TO_SEC32(  tick )  OSi_TICK_TO_SEC32( tick, 64 )
+#define  OSi_TICK_TO_SEC(    tick, prescale )  ( ((u64)(tick) * (prescale)) / OS_TICK_CLOCK )
+#define  OSi_TICK_TO_SEC32(  tick, prescale )  ( ((u32)(tick) * (prescale)) / OS_TICK_CLOCK )
 
-#define  OS_TICK_TO_MSEC(   tick )  OSi_TICK_TO_MSEC(   tick, 64 )
-#define  OS_TICK_TO_MSEC32( tick )  OSi_TICK_TO_MSEC32( tick, 64 )
-
-#define  OS_TICK_TO_USEC(   tick )  OSi_TICK_TO_USEC(   tick, 64 )
-#define  OS_TICK_TO_USEC32( tick )  OSi_TICK_TO_USEC32( tick, 64 )
-
-
-static inline OSTick i_osSecToTick( u64 sec )
-{
-    return OS_SEC_TO_TICK( sec );
-}
-
-static inline OSTick32 i_osSecToTick32( u32 sec )
-{
-    return OS_SEC_TO_TICK32( sec );
-}
-
-static inline OSTick i_osMSecToTick( u64 msec )
-{
-    return OS_MSEC_TO_TICK( msec );
-}
-
-static inline OSTick32 i_osMSecToTick32( u32 msec )
-{
-    return OS_MSEC_TO_TICK32( msec );
-}
-
-static inline OSTick i_osUSecToTick( u64 usec )
-{
-    return OS_USEC_TO_TICK( usec );
-}
-
-static inline OSTick32 i_osUSecToTick32( u32 usec )
-{
-    return OS_USEC_TO_TICK32( usec );
-}
-
-static inline u64 i_osTickToSec( OSTick tick )
-{
-    return OS_TICK_TO_SEC( tick );
-}
-
-static inline u32 i_osTickToSec32( OSTick32 tick )
-{
-    return OS_TICK_TO_SEC32( tick );
-}
-
-static inline u64 i_osTickToMSec( OSTick tick )
-{
-    return OS_TICK_TO_MSEC( tick );
-}
-
-static inline u32 i_osTickToMSec32( OSTick32 tick )
-{
-    return OS_TICK_TO_MSEC32( tick );
-}
-
-static inline u64 i_osTickToUSec( OSTick tick )
-{
-    return OS_TICK_TO_USEC( tick );
-}
-
-static inline u32 i_osTickToUSec32( OSTick32 tick )
-{
-    return OS_TICK_TO_USEC32( tick );
-}
+#define  OSi_TICK_TO_MSEC(   tick, prescale )  ( ((u64)(tick) * (prescale)) / (OS_TICK_CLOCK/1000) )
+#define  OSi_TICK_TO_MSEC32( tick, prescale )  ( ((u32)(tick) * (prescale)) / (OS_TICK_CLOCK/1000) )
 
+#define  OSi_TICK_TO_USEC(   tick, prescale )  ( ((u64)(tick) * (prescale) * 1000) / (OS_TICK_CLOCK/1000) )
+#define  OSi_TICK_TO_USEC32( tick, prescale )  ( ((u32)(tick) * (prescale) * 1000) / (OS_TICK_CLOCK/1000) )
 
 
 #ifdef __cplusplus
diff --git a/trunk/include/ctr/hw/ARM11/arm11_reg.h b/trunk/include/ctr/hw/ARM11/arm11_reg.h
index ad74d71..f69b9cf 100644
--- a/trunk/include/ctr/hw/ARM11/arm11_reg.h
+++ b/trunk/include/ctr/hw/ARM11/arm11_reg.h
@@ -395,10 +395,10 @@ extern "C" {
 #define HW_C15_CYCLE_COUNT_IE       0x00000040  // Cycle Counter interrupt enable
 #define HW_C15_COUNT1_IE            0x00000020  // Count Register 1 interrupt enable
 #define HW_C15_COUNT0_IE            0x00000010  // Count Register 0 interrupt enable
-#define HW_C15_CYCLE_COUNT_DIV64    0x00000008  // Cycle Counter counts every 64th processor clock cycle
+#define HW_C15_CYCLE_COUNT_D64      0x00000008  // Cycle Counter counts every 64th processor clock cycle
 #define HW_C15_CYCLE_COUNT_RESET    0x00000004  // Cycle Counter Reset on Write
 #define HW_C15_COUNT01_RESET        0x00000002  // Counter Register 0/1 Reset on Write
-#define HW_C15_COUNT_ENABLE         0x00000001  // All three counters enable
+#define HW_C15_PMN_ENABLE           0x00000001  // All three counters enable
 
 #define HW_C15_COUNT0_EVT_SFT       20
 #define HW_C15_COUNT1_EVT_SFT       12