armv7_pmu.c 文件参考

浏览源代码.

函数
	OS_PMU_INTS (LOSCFG_KERNEL_CORE_NUM, g_pmuIrqNr)
STATIC INLINE UINT32	Armv7PmncRead (VOID)
STATIC INLINE VOID	Armv7PmncWrite (UINT32 value)
STATIC INLINE UINT32	Armv7PmuOverflowed (UINT32 pmnc)
STATIC INLINE UINT32	Armv7PmuCntOverflowed (UINT32 pmnc, UINT32 index)
STATIC INLINE UINT32	Armv7CntValid (UINT32 index)
STATIC INLINE VOID	Armv7PmuSelCnt (UINT32 index)
STATIC INLINE VOID	Armv7PmuSetCntPeriod (UINT32 index, UINT32 period)
STATIC INLINE VOID	Armv7BindEvt2Cnt (UINT32 index, UINT32 value)
STATIC INLINE VOID	Armv7EnableCnt (UINT32 index)
STATIC INLINE VOID	Armv7DisableCnt (UINT32 index)
STATIC INLINE VOID	Armv7EnableCntInterrupt (UINT32 index)
STATIC INLINE VOID	Armv7DisableCntInterrupt (UINT32 index)
STATIC INLINE UINT32	Armv7PmuGetOverflowStatus (VOID)
STATIC VOID	Armv7EnableEvent (Event *event)
STATIC VOID	Armv7DisableEvent (Event *event)
STATIC VOID	Armv7StartAllCnt (VOID)
STATIC VOID	Armv7StopAllCnt (VOID)
STATIC VOID	Armv7ResetAllCnt (VOID)
STATIC VOID	Armv7SetEventPeriod (Event *event)
STATIC UINTPTR	Armv7ReadEventCnt (Event *event)
UINT32	Armv7PmuMapEvent (UINT32 eventType, BOOL reverse)
STATIC VOID	Armv7PmuIrqHandler (VOID)
UINT32	OsGetPmuMaxCounter (VOID)
UINT32	OsGetPmuCycleCounter (VOID)
UINT32	OsGetPmuCounter0 (VOID)
UINT32	OsHwPmuInit (VOID)

变量
STATIC HwPmu	g_armv7Pmu
STATIC const UINT32	g_armv7Map []

函数说明

Armv7BindEvt2Cnt()

STATIC INLINE VOID Armv7BindEvt2Cnt	(	UINT32	index,
		UINT32	value
	)

在文件 armv7_pmu.c 第 88 行定义.

{
    PRINT_DEBUG("bind event: %u to counter: %u\n", value, index);
    Armv7PmuSelCnt(index);
    value &= ARMV7_EVTYPE_MASK;
    __asm__ volatile("mcr p15, 0, %0, c9, c13, 1" : : "r" (value));
}

函数调用图:

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Armv7CntValid()

STATIC INLINE UINT32 Armv7CntValid

(

UINT32

index

)

在文件 armv7_pmu.c 第 64 行定义.

{
    return index <= ARMV7_IDX_COUNTER_LAST;
}

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Armv7DisableCnt()

STATIC INLINE VOID Armv7DisableCnt

(

UINT32

index

)

在文件 armv7_pmu.c 第 103 行定义.

{
    UINT32 counter = ARMV7_IDX2CNT(index);
    PRINT_DEBUG("index : %u, counter: %u\n", index, counter);
    __asm__ volatile("mcr p15, 0, %0, c9, c12, 2" : : "r" (ARMV7_CNT2BIT(counter)));
}

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Armv7DisableCntInterrupt()

STATIC INLINE VOID Armv7DisableCntInterrupt

(

UINT32

index

)

在文件 armv7_pmu.c 第 117 行定义.

{
    UINT32 counter = ARMV7_IDX2CNT(index);
    __asm__ volatile("mcr p15, 0, %0, c9, c14, 2" : : "r" (ARMV7_CNT2BIT(counter)));
    /* Clear the overflow flag in case an interrupt is pending. */
    __asm__ volatile("mcr p15, 0, %0, c9, c12, 3" : : "r" (ARMV7_CNT2BIT(counter)));
    ISB;
}

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Armv7DisableEvent()

STATIC VOID Armv7DisableEvent

(

Event *

event

)

在文件 armv7_pmu.c 第 175 行定义.

{
    UINT32 cnt = event->counter;
 
    if (!Armv7CntValid(cnt)) {
        PRINT_ERR("CPU enabling wrong PMNC counter IRQ enable %u\n", cnt);
        return;
    }
 
    UINT32 intSave = LOS_IntLock();
    Armv7DisableCnt(cnt);
    Armv7DisableCntInterrupt(cnt);
    LOS_IntRestore(intSave);
}

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Armv7EnableCnt()

STATIC INLINE VOID Armv7EnableCnt

(

UINT32

index

)

在文件 armv7_pmu.c 第 96 行定义.

{
    UINT32 counter = ARMV7_IDX2CNT(index);
    PRINT_DEBUG("index : %u, counter: %u\n", index, counter);
    __asm__ volatile("mcr p15, 0, %0, c9, c12, 1" : : "r" (ARMV7_CNT2BIT(counter)));
}

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Armv7EnableCntInterrupt()

STATIC INLINE VOID Armv7EnableCntInterrupt

(

UINT32

index

)

在文件 armv7_pmu.c 第 110 行定义.

{
    UINT32 counter = ARMV7_IDX2CNT(index);
    __asm__ volatile("mcr p15, 0, %0, c9, c14, 1" : : "r" (ARMV7_CNT2BIT(counter)));
    ISB;
}

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Armv7EnableEvent()

STATIC VOID Armv7EnableEvent

(

Event *

event

)

在文件 armv7_pmu.c 第 137 行定义.

{
    UINT32 cnt = event->counter;
 
    if (!Armv7CntValid(cnt)) {
        PRINT_ERR("CPU enabling wrong PMNC counter IRQ enable %u\n", cnt);
        return;
    }
 
    if (event->period == 0) {
        PRINT_INFO("event period value not valid, counter: %u\n", cnt);
        return;
    }
    /*
     * Enable counter and interrupt, and set the counter to count
     * the event that we're interested in.
     */
    UINT32 intSave = LOS_IntLock();
 
    Armv7DisableCnt(cnt);
 
    /*
     * Set event (if destined for PMNx counters)
     * We only need to set the event for the cycle counter if we
     * have the ability to perform event filtering.
     */
    if (cnt != ARMV7_IDX_CYCLE_COUNTER) {
        Armv7BindEvt2Cnt(cnt, event->eventId);
    }
 
    /* Enable interrupt for this counter */
    Armv7EnableCntInterrupt(cnt);
    Armv7EnableCnt(cnt);
    LOS_IntRestore(intSave);
 
    PRINT_DEBUG("enabled event: %u cnt: %u\n", event->eventId, cnt);
}

函数调用图:

Armv7PmncRead()

STATIC INLINE UINT32 Armv7PmncRead

(

VOID

)

在文件 armv7_pmu.c 第 40 行定义.

{
    UINT32 value = 0;
    __asm__ volatile("mrc p15, 0, %0, c9, c12, 0" : "=r"(value));
    return value;
}

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Armv7PmncWrite()

STATIC INLINE VOID Armv7PmncWrite

(

UINT32

value

)

在文件 armv7_pmu.c 第 47 行定义.

{
    value &= ARMV7_PMNC_MASK;
    __asm__ volatile("mcr p15, 0, %0, c9, c12, 0" : : "r"(value));
    ISB;
}

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Armv7PmuCntOverflowed()

STATIC INLINE UINT32 Armv7PmuCntOverflowed	(	UINT32	pmnc,
		UINT32	index
	)

在文件 armv7_pmu.c 第 59 行定义.

{
    return pmnc & ARMV7_CNT2BIT(ARMV7_IDX2CNT(index));
}

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Armv7PmuGetOverflowStatus()

STATIC INLINE UINT32 Armv7PmuGetOverflowStatus

(

VOID

)

在文件 armv7_pmu.c 第 126 行定义.

{
    UINT32 value;
 
    __asm__ volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (value));
    value &= ARMV7_FLAG_MASK;
    __asm__ volatile("mcr p15, 0, %0, c9, c12, 3" : : "r" (value));
 
    return value;
}

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Armv7PmuIrqHandler()

STATIC VOID Armv7PmuIrqHandler

(

VOID

)

在文件 armv7_pmu.c 第 292 行定义.

{
    UINT32 index;
    PerfRegs regs;
 
    PerfEvent *events = &(g_armv7Pmu.pmu.events);
    UINT32 eventNum = events->nr;
 
    /* Get and reset the IRQ flags */
    UINT32 pmnc = Armv7PmuGetOverflowStatus();
    if (!Armv7PmuOverflowed(pmnc)) {
        return;
    }
 
    (VOID)memset_s(&regs, sizeof(PerfRegs), 0, sizeof(PerfRegs));
    OsPerfFetchIrqRegs(&regs);
 
    Armv7StopAllCnt();
 
    for (index = 0; index < eventNum; index++) {
        Event *event = &(events->per[index]);
        /*
         * We have a single interrupt for all counters. Check that
         * each counter has overflowed before we process it.
         */
        if (!Armv7PmuCntOverflowed(pmnc, event->counter) || (event->period == 0)) {
            continue;
        }
 
        Armv7PmuSetCntPeriod(event->counter, PERIOD_CALC(event->period));
 
        OsPerfUpdateEventCount(event, event->period);
        OsPerfHandleOverFlow(event, &regs);
    }
    Armv7StartAllCnt();
}

函数调用图:

这是这个函数的调用关系图:

Armv7PmuMapEvent()

UINT32 Armv7PmuMapEvent	(	UINT32	eventType,
		BOOL	reverse
	)

在文件 armv7_pmu.c 第 274 行定义.

{
    if (!reverse) {  /* Common event to armv7 real event */
        if (eventType < ARRAY_SIZE(g_armv7Map)) {
            return g_armv7Map[eventType];
        }
        return eventType;
    } else {        /* Armv7 real event to common event */
        UINT32 i;
        for (i = 0; i < ARRAY_SIZE(g_armv7Map); i++) {
            if (g_armv7Map[i] == eventType) {
                return i;
            }
        }
        return PERF_HW_INVALID_EVENT_TYPE;
    }
}

Armv7PmuOverflowed()

STATIC INLINE UINT32 Armv7PmuOverflowed

(

UINT32

pmnc

)

在文件 armv7_pmu.c 第 54 行定义.

{
    return pmnc & ARMV7_OVERFLOWED_MASK;
}

这是这个函数的调用关系图:

Armv7PmuSelCnt()

STATIC INLINE VOID Armv7PmuSelCnt

(

UINT32

index

)

在文件 armv7_pmu.c 第 69 行定义.

{
    UINT32 counter = ARMV7_IDX2CNT(index);
    __asm__ volatile("mcr p15, 0, %0, c9, c12, 5" : : "r" (counter));
    ISB;
}

这是这个函数的调用关系图:

Armv7PmuSetCntPeriod()

STATIC INLINE VOID Armv7PmuSetCntPeriod	(	UINT32	index,
		UINT32	period
	)

在文件 armv7_pmu.c 第 76 行定义.

{
    if (!Armv7CntValid(index)) {
        PRINT_ERR("CPU writing wrong counter %u\n", index);
    } else if (index == ARMV7_IDX_CYCLE_COUNTER) {
        __asm__ volatile("mcr p15, 0, %0, c9, c13, 0" : : "r" (period));
    } else {
        Armv7PmuSelCnt(index);
        __asm__ volatile("mcr p15, 0, %0, c9, c13, 2" : : "r" (period));
    }
}

函数调用图:

这是这个函数的调用关系图:

Armv7ReadEventCnt()

STATIC UINTPTR Armv7ReadEventCnt

(

Event *

event

)

在文件 armv7_pmu.c 第 239 行定义.

{
    UINT32 value = 0;
    UINT32 index = event->counter;
 
    if (!Armv7CntValid(index)) {
        PRINT_ERR("CPU reading wrong counter %u\n", index);
    } else if (index == ARMV7_IDX_CYCLE_COUNTER) {
        __asm__ volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (value));
    } else {
        Armv7PmuSelCnt(index);
        __asm__ volatile("mrc p15, 0, %0, c9, c13, 2" : "=r" (value));
    }
 
    if (value < PERIOD_CALC(event->period)) {
        if (Armv7PmuCntOverflowed(Armv7PmuGetOverflowStatus(), event->counter)) {
            value += event->period;
        }
    } else {
        value -= PERIOD_CALC(event->period);
    }
    return value;
}

函数调用图:

Armv7ResetAllCnt()

STATIC VOID Armv7ResetAllCnt

(

VOID

)

在文件 armv7_pmu.c 第 216 行定义.

{
    UINT32 index;
 
    /* The counter and interrupt enable registers are unknown at reset. */
    for (index = ARMV7_IDX_CYCLE_COUNTER; index < ARMV7_IDX_MAX_COUNTER; index++) {
        Armv7DisableCnt(index);
        Armv7DisableCntInterrupt(index);
    }
 
    /* Initialize & Reset PMNC: C and P bits and D bits */
    UINT32 reg = ARMV7_PMNC_P | ARMV7_PMNC_C | (g_armv7Pmu.cntDivided ? ARMV7_PMNC_D : 0);
    Armv7PmncWrite(reg);
}

函数调用图:

Armv7SetEventPeriod()

STATIC VOID Armv7SetEventPeriod

(

Event *

event

)

在文件 armv7_pmu.c 第 231 行定义.

{
    if (event->period != 0) {
        PRINT_INFO("counter: %u, period: 0x%x\n", event->counter, event->period);
        Armv7PmuSetCntPeriod(event->counter, PERIOD_CALC(event->period));
    }
}

函数调用图:

Armv7StartAllCnt()

STATIC VOID Armv7StartAllCnt

(

VOID

)

在文件 armv7_pmu.c 第 191 行定义.

{
    PRINT_DEBUG("starting pmu...\n");
 
    /* Enable all counters */
    UINT32 reg = Armv7PmncRead() | ARMV7_PMNC_E;
    if (g_armv7Pmu.cntDivided) {
        reg |= ARMV7_PMNC_D;
    } else {
        reg &= ~ARMV7_PMNC_D;
    }
 
    Armv7PmncWrite(reg);
    HalIrqUnmask(g_pmuIrqNr[ArchCurrCpuid()]);
}

函数调用图:

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Armv7StopAllCnt()

STATIC VOID Armv7StopAllCnt

(

VOID

)

在文件 armv7_pmu.c 第 207 行定义.

{
    PRINT_DEBUG("stopping pmu...\n");
    /* Disable all counters */
    Armv7PmncWrite(Armv7PmncRead() & ~ARMV7_PMNC_E);
 
    HalIrqMask(g_pmuIrqNr[ArchCurrCpuid()]);
}

函数调用图:

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OS_PMU_INTS()

OS_PMU_INTS	(	LOSCFG_KERNEL_CORE_NUM	,
		g_pmuIrqNr
	)

OsGetPmuCounter0()

UINT32 OsGetPmuCounter0

(

VOID

)

在文件 armv7_pmu.c 第 339 行定义.

{
    return ARMV7_IDX_COUNTER0;
}

这是这个函数的调用关系图:

OsGetPmuCycleCounter()

UINT32 OsGetPmuCycleCounter

(

VOID

)

在文件 armv7_pmu.c 第 334 行定义.

{
    return ARMV7_IDX_CYCLE_COUNTER;
}

这是这个函数的调用关系图:

OsGetPmuMaxCounter()

UINT32 OsGetPmuMaxCounter

(

VOID

)

在文件 armv7_pmu.c 第 329 行定义.

{
    return ARMV7_IDX_MAX_COUNTER;
}

这是这个函数的调用关系图:

OsHwPmuInit()

UINT32 OsHwPmuInit

(

VOID

)

在文件 armv7_pmu.c 第 356 行定义.

{
    UINT32 ret;
    UINT32 index;
 
    for (index = 0; index < LOSCFG_KERNEL_CORE_NUM; index++) {
        ret = LOS_HwiCreate(g_pmuIrqNr[index], 0, 0, Armv7PmuIrqHandler, 0);
        if (ret != LOS_OK) {
            PRINT_ERR("pmu %u irq handler register failed\n", g_pmuIrqNr[index]);
            return ret;
        }
#ifdef LOSCFG_KERNEL_SMP
        HalIrqSetAffinity(g_pmuIrqNr[index], CPUID_TO_AFFI_MASK(index));
#endif
    }
    ret = OsPerfHwInit(&g_armv7Pmu);
    return ret;
}

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变量说明

g_armv7Map

STATIC const UINT32 g_armv7Map[]

初始值:

= {
    [PERF_COUNT_HW_CPU_CYCLES]          = ARMV7_PERF_HW_CYCLES,
    [PERF_COUNT_HW_INSTRUCTIONS]        = ARMV7_PERF_HW_INSTRUCTIONS,
    [PERF_COUNT_HW_DCACHE_REFERENCES]   = ARMV7_PERF_HW_DCACHES,
    [PERF_COUNT_HW_DCACHE_MISSES]       = ARMV7_PERF_HW_DCACHE_MISSES,
    [PERF_COUNT_HW_ICACHE_REFERENCES]   = ARMV7_PERF_HW_ICACHES,
    [PERF_COUNT_HW_ICACHE_MISSES]       = ARMV7_PERF_HW_ICACHE_MISSES,
    [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERF_HW_BRANCHES,
    [PERF_COUNT_HW_BRANCH_MISSES]       = ARMV7_PERF_HW_BRANCE_MISSES,
}

在文件 armv7_pmu.c 第 263 行定义.

g_armv7Pmu

STATIC HwPmu g_armv7Pmu

初始值:

= {
    .canDivided = TRUE,
    .enable     = Armv7EnableEvent,
    .disable    = Armv7DisableEvent,
    .start      = Armv7StartAllCnt,
    .stop       = Armv7StopAllCnt,
    .clear      = Armv7ResetAllCnt,
    .setPeriod  = Armv7SetEventPeriod,
    .readCnt    = Armv7ReadEventCnt,
    .mapEvent   = Armv7PmuMapEvent,
}

在文件 armv7_pmu.c 第 38 行定义.