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#ifndef __mvCpuCntrs_h__
#define __mvCpuCntrs_h__

#include "mvTypes.h"
#include "mvOs.h"


#define MV_CPU_CNTRS_NUM            4
#define MV_CPU_CNTRS_OPS_NUM        32

typedef enum
{
    MV_CPU_CNTRS_INVALID = 0,
    MV_CPU_CNTRS_CYCLES,
    MV_CPU_CNTRS_ICACHE_READ_MISS,
    MV_CPU_CNTRS_DCACHE_ACCESS,
    MV_CPU_CNTRS_DCACHE_READ_MISS,
    MV_CPU_CNTRS_DCACHE_READ_HIT,
    MV_CPU_CNTRS_DCACHE_WRITE_MISS,
    MV_CPU_CNTRS_DCACHE_WRITE_HIT,
    MV_CPU_CNTRS_DTLB_MISS,
    MV_CPU_CNTRS_TLB_MISS,
    MV_CPU_CNTRS_ITLB_MISS,
    MV_CPU_CNTRS_INSTRUCTIONS,
    MV_CPU_CNTRS_SINGLE_ISSUE,
    MV_CPU_CNTRS_MMU_READ_LATENCY,
    MV_CPU_CNTRS_MMU_READ_BEAT,
    MV_CPU_CNTRS_BRANCH_RETIRED,
    MV_CPU_CNTRS_BRANCH_TAKEN,
    MV_CPU_CNTRS_BRANCH_PREDICT_MISS,
    MV_CPU_CNTRS_BRANCH_PREDICT_COUNT,
    MV_CPU_CNTRS_WB_FULL_CYCLES,
    MV_CPU_CNTRS_WB_WRITE_LATENCY,
    MV_CPU_CNTRS_WB_WRITE_BEAT,
    MV_CPU_CNTRS_ICACHE_READ_LATENCY,
    MV_CPU_CNTRS_ICACHE_READ_BEAT,
    MV_CPU_CNTRS_DCACHE_READ_LATENCY,
    MV_CPU_CNTRS_DCACHE_READ_BEAT,
    MV_CPU_CNTRS_DCACHE_WRITE_LATENCY,
    MV_CPU_CNTRS_DCACHE_WRITE_BEAT,
    MV_CPU_CNTRS_LDM_STM_HOLD,
    MV_CPU_CNTRS_IS_HOLD,
    MV_CPU_CNTRS_DATA_WRITE_ACCESS,
    MV_CPU_CNTRS_DATA_READ_ACCESS,
    MV_CPU_CNTRS_BIU_SIMULT_ACCESS,
    MV_CPU_CNTRS_BIU_ANY_ACCESS,

} MV_CPU_CNTRS_OPS;

typedef struct
{
    char                name[16];
    MV_CPU_CNTRS_OPS    operation;
    int                 opIdx;
    MV_U32              overhead;
    
} MV_CPU_CNTRS_ENTRY;


typedef struct
{
    char   name[16];
    MV_U32 num_of_measurements;
    MV_U32 avg_sample_count;
    MV_U64 counters_before[MV_CPU_CNTRS_NUM];
    MV_U64 counters_after[MV_CPU_CNTRS_NUM];
    MV_U64 counters_sum[MV_CPU_CNTRS_NUM];

} MV_CPU_CNTRS_EVENT;

extern MV_CPU_CNTRS_ENTRY  mvCpuCntrsTbl[MV_CPU_CNTRS_NUM];


MV_STATUS           mvCpuCntrsProgram(int counter, MV_CPU_CNTRS_OPS op, 
                                      char* name, MV_U32 overhead);
void                mvCpuCntrsInit(void);
MV_CPU_CNTRS_EVENT* mvCpuCntrsEventCreate(char* name, MV_U32 print_threshold);
void                mvCpuCntrsEventDelete(MV_CPU_CNTRS_EVENT* event);
void                mvCpuCntrsReset(void);
void                mvCpuCntrsShow(MV_CPU_CNTRS_EVENT* pEvent);
void 		    mvCpuCntrsEventClear(MV_CPU_CNTRS_EVENT* pEvent);

/* internal */
void 		    program_counter(int counter, int op);

static INLINE MV_U64 mvCpuCntrsRead(const int counter)
{
    MV_U32 low = 0, high = 0;
    MV_U32 ll = 0;
    
    switch(counter)
    {
        case 0:
            MV_ASM  ("mcr p15, 0, %0, c15, c12, 0" : : "r" (ll));
            MV_ASM  ("mrc p15, 0, %0, c15, c13, 0" : "=r" (low));
            MV_ASM  ("mrc p15, 0, %0, c15, c13, 1" : "=r" (high));
         break;

        case 1:
            MV_ASM  ("mcr p15, 0, %0, c15, c12, 1" : : "r" (ll));
            MV_ASM  ("mrc p15, 0, %0, c15, c13, 2" : "=r" (low));
            MV_ASM  ("mrc p15, 0, %0, c15, c13, 3" : "=r" (high));
         break;

        case 2:
            MV_ASM  ("mcr p15, 0, %0, c15, c12, 2" : : "r" (ll));
            MV_ASM  ("mrc p15, 0, %0, c15, c13, 4" : "=r" (low));
            MV_ASM  ("mrc p15, 0, %0, c15, c13, 5" : "=r" (high));
         break;

        case 3:
            MV_ASM  ("mcr p15, 0, %0, c15, c12, 3" : : "r" (ll));
            MV_ASM  ("mrc p15, 0, %0, c15, c13, 6" : "=r" (low));
            MV_ASM  ("mrc p15, 0, %0, c15, c13, 7" : "=r" (high));
         break;

        default:
            mvOsPrintf("mv_cpu_cntrs_read: bad counter number (%d)\n", counter);
    }
    program_counter(counter, mvCpuCntrsTbl[counter].opIdx);
    return (((MV_U64)high << 32 ) | low);

}


static INLINE void mvCpuCntrsReadBefore(MV_CPU_CNTRS_EVENT* pEvent)
{
#if 0
    int i;

    /* order is important - we want to measure the cycle count last here! */
    for(i=0; i<MV_CPU_CNTRS_NUM; i++)
        pEvent->counters_before[i] = mvCpuCntrsRead(i);
#else
    pEvent->counters_before[1] = mvCpuCntrsRead(1);
    pEvent->counters_before[3] = mvCpuCntrsRead(3);
    pEvent->counters_before[0] = mvCpuCntrsRead(0);
    pEvent->counters_before[2] = mvCpuCntrsRead(2);
#endif
}

static INLINE void mvCpuCntrsReadAfter(MV_CPU_CNTRS_EVENT* pEvent)
{
    int i;

#if 0
    /* order is important - we want to measure the cycle count first here! */
    for(i=0; i<MV_CPU_CNTRS_NUM; i++)
        pEvent->counters_after[i] = mvCpuCntrsRead(i);
#else
    pEvent->counters_after[2] = mvCpuCntrsRead(2);
    pEvent->counters_after[0] = mvCpuCntrsRead(0);
    pEvent->counters_after[3] = mvCpuCntrsRead(3);
    pEvent->counters_after[1] = mvCpuCntrsRead(1);
#endif 

    for(i=0; i<MV_CPU_CNTRS_NUM; i++)
    {
        pEvent->counters_sum[i] += (pEvent->counters_after[i] - pEvent->counters_before[i]);	
    }
    pEvent->num_of_measurements++;
}


#ifdef CONFIG_MV_CPU_PERF_CNTRS

#define MV_CPU_CNTRS_READ(counter)  mvCpuCntrsRead(counter)

#define MV_CPU_CNTRS_START(event)	mvCpuCntrsReadBefore(event)

#define MV_CPU_CNTRS_STOP(event)	mvCpuCntrsReadAfter(event)
			
#define MV_CPU_CNTRS_SHOW(event)	mvCpuCntrsShow(event)

#else

#define MV_CPU_CNTRS_READ(counter)
#define MV_CPU_CNTRS_START(event)
#define MV_CPU_CNTRS_STOP(event)
#define MV_CPU_CNTRS_SHOW(event)

#endif /* CONFIG_MV_CPU_PERF_CNTRS */


#endif /* __mvCpuCntrs_h__ */