* ARM performance counter support.
*
* Copyright (C) 2009 picoChip Designs, Ltd., Jamie Iles
- *
- * ARMv7 support: Jean Pihet <jpihet@mvista.com>
- * 2010 (c) MontaVista Software, LLC.
+ * Copyright (C) 2010 ARM Ltd., Will Deacon <will.deacon@arm.com>
*
* This code is based on the sparc64 perf event code, which is in turn based
* on the x86 code. Callchain code is based on the ARM OProfile backtrace
.read = armpmu_read,
};
-/*
- * ARMv6 Performance counter handling code.
- *
- * ARMv6 has 2 configurable performance counters and a single cycle counter.
- * They all share a single reset bit but can be written to zero so we can use
- * that for a reset.
- *
- * The counters can't be individually enabled or disabled so when we remove
- * one event and replace it with another we could get spurious counts from the
- * wrong event. However, we can take advantage of the fact that the
- * performance counters can export events to the event bus, and the event bus
- * itself can be monitored. This requires that we *don't* export the events to
- * the event bus. The procedure for disabling a configurable counter is:
- * - change the counter to count the ETMEXTOUT[0] signal (0x20). This
- * effectively stops the counter from counting.
- * - disable the counter's interrupt generation (each counter has it's
- * own interrupt enable bit).
- * Once stopped, the counter value can be written as 0 to reset.
- *
- * To enable a counter:
- * - enable the counter's interrupt generation.
- * - set the new event type.
- *
- * Note: the dedicated cycle counter only counts cycles and can't be
- * enabled/disabled independently of the others. When we want to disable the
- * cycle counter, we have to just disable the interrupt reporting and start
- * ignoring that counter. When re-enabling, we have to reset the value and
- * enable the interrupt.
- */
-
-enum armv6_perf_types {
- ARMV6_PERFCTR_ICACHE_MISS = 0x0,
- ARMV6_PERFCTR_IBUF_STALL = 0x1,
- ARMV6_PERFCTR_DDEP_STALL = 0x2,
- ARMV6_PERFCTR_ITLB_MISS = 0x3,
- ARMV6_PERFCTR_DTLB_MISS = 0x4,
- ARMV6_PERFCTR_BR_EXEC = 0x5,
- ARMV6_PERFCTR_BR_MISPREDICT = 0x6,
- ARMV6_PERFCTR_INSTR_EXEC = 0x7,
- ARMV6_PERFCTR_DCACHE_HIT = 0x9,
- ARMV6_PERFCTR_DCACHE_ACCESS = 0xA,
- ARMV6_PERFCTR_DCACHE_MISS = 0xB,
- ARMV6_PERFCTR_DCACHE_WBACK = 0xC,
- ARMV6_PERFCTR_SW_PC_CHANGE = 0xD,
- ARMV6_PERFCTR_MAIN_TLB_MISS = 0xF,
- ARMV6_PERFCTR_EXPL_D_ACCESS = 0x10,
- ARMV6_PERFCTR_LSU_FULL_STALL = 0x11,
- ARMV6_PERFCTR_WBUF_DRAINED = 0x12,
- ARMV6_PERFCTR_CPU_CYCLES = 0xFF,
- ARMV6_PERFCTR_NOP = 0x20,
-};
-
-enum armv6_counters {
- ARMV6_CYCLE_COUNTER = 1,
- ARMV6_COUNTER0,
- ARMV6_COUNTER1,
-};
-
-/*
- * The hardware events that we support. We do support cache operations but
- * we have harvard caches and no way to combine instruction and data
- * accesses/misses in hardware.
- */
-static const unsigned armv6_perf_map[PERF_COUNT_HW_MAX] = {
- [PERF_COUNT_HW_CPU_CYCLES] = ARMV6_PERFCTR_CPU_CYCLES,
- [PERF_COUNT_HW_INSTRUCTIONS] = ARMV6_PERFCTR_INSTR_EXEC,
- [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED,
- [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED,
- [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV6_PERFCTR_BR_EXEC,
- [PERF_COUNT_HW_BRANCH_MISSES] = ARMV6_PERFCTR_BR_MISPREDICT,
- [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED,
-};
-
-static const unsigned armv6_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
- [PERF_COUNT_HW_CACHE_OP_MAX]
- [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
- [C(L1D)] = {
- /*
- * The performance counters don't differentiate between read
- * and write accesses/misses so this isn't strictly correct,
- * but it's the best we can do. Writes and reads get
- * combined.
- */
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = ARMV6_PERFCTR_DCACHE_ACCESS,
- [C(RESULT_MISS)] = ARMV6_PERFCTR_DCACHE_MISS,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = ARMV6_PERFCTR_DCACHE_ACCESS,
- [C(RESULT_MISS)] = ARMV6_PERFCTR_DCACHE_MISS,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
- [C(L1I)] = {
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = ARMV6_PERFCTR_ICACHE_MISS,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = ARMV6_PERFCTR_ICACHE_MISS,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
- [C(LL)] = {
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
- [C(DTLB)] = {
- /*
- * The ARM performance counters can count micro DTLB misses,
- * micro ITLB misses and main TLB misses. There isn't an event
- * for TLB misses, so use the micro misses here and if users
- * want the main TLB misses they can use a raw counter.
- */
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = ARMV6_PERFCTR_DTLB_MISS,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = ARMV6_PERFCTR_DTLB_MISS,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
- [C(ITLB)] = {
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = ARMV6_PERFCTR_ITLB_MISS,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = ARMV6_PERFCTR_ITLB_MISS,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
- [C(BPU)] = {
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
-};
-
-enum armv6mpcore_perf_types {
- ARMV6MPCORE_PERFCTR_ICACHE_MISS = 0x0,
- ARMV6MPCORE_PERFCTR_IBUF_STALL = 0x1,
- ARMV6MPCORE_PERFCTR_DDEP_STALL = 0x2,
- ARMV6MPCORE_PERFCTR_ITLB_MISS = 0x3,
- ARMV6MPCORE_PERFCTR_DTLB_MISS = 0x4,
- ARMV6MPCORE_PERFCTR_BR_EXEC = 0x5,
- ARMV6MPCORE_PERFCTR_BR_NOTPREDICT = 0x6,
- ARMV6MPCORE_PERFCTR_BR_MISPREDICT = 0x7,
- ARMV6MPCORE_PERFCTR_INSTR_EXEC = 0x8,
- ARMV6MPCORE_PERFCTR_DCACHE_RDACCESS = 0xA,
- ARMV6MPCORE_PERFCTR_DCACHE_RDMISS = 0xB,
- ARMV6MPCORE_PERFCTR_DCACHE_WRACCESS = 0xC,
- ARMV6MPCORE_PERFCTR_DCACHE_WRMISS = 0xD,
- ARMV6MPCORE_PERFCTR_DCACHE_EVICTION = 0xE,
- ARMV6MPCORE_PERFCTR_SW_PC_CHANGE = 0xF,
- ARMV6MPCORE_PERFCTR_MAIN_TLB_MISS = 0x10,
- ARMV6MPCORE_PERFCTR_EXPL_MEM_ACCESS = 0x11,
- ARMV6MPCORE_PERFCTR_LSU_FULL_STALL = 0x12,
- ARMV6MPCORE_PERFCTR_WBUF_DRAINED = 0x13,
- ARMV6MPCORE_PERFCTR_CPU_CYCLES = 0xFF,
-};
-
-/*
- * The hardware events that we support. We do support cache operations but
- * we have harvard caches and no way to combine instruction and data
- * accesses/misses in hardware.
- */
-static const unsigned armv6mpcore_perf_map[PERF_COUNT_HW_MAX] = {
- [PERF_COUNT_HW_CPU_CYCLES] = ARMV6MPCORE_PERFCTR_CPU_CYCLES,
- [PERF_COUNT_HW_INSTRUCTIONS] = ARMV6MPCORE_PERFCTR_INSTR_EXEC,
- [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED,
- [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED,
- [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV6MPCORE_PERFCTR_BR_EXEC,
- [PERF_COUNT_HW_BRANCH_MISSES] = ARMV6MPCORE_PERFCTR_BR_MISPREDICT,
- [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED,
-};
-
-static const unsigned armv6mpcore_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
- [PERF_COUNT_HW_CACHE_OP_MAX]
- [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
- [C(L1D)] = {
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] =
- ARMV6MPCORE_PERFCTR_DCACHE_RDACCESS,
- [C(RESULT_MISS)] =
- ARMV6MPCORE_PERFCTR_DCACHE_RDMISS,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] =
- ARMV6MPCORE_PERFCTR_DCACHE_WRACCESS,
- [C(RESULT_MISS)] =
- ARMV6MPCORE_PERFCTR_DCACHE_WRMISS,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
- [C(L1I)] = {
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ICACHE_MISS,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ICACHE_MISS,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
- [C(LL)] = {
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
- [C(DTLB)] = {
- /*
- * The ARM performance counters can count micro DTLB misses,
- * micro ITLB misses and main TLB misses. There isn't an event
- * for TLB misses, so use the micro misses here and if users
- * want the main TLB misses they can use a raw counter.
- */
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_DTLB_MISS,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_DTLB_MISS,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
- [C(ITLB)] = {
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ITLB_MISS,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ITLB_MISS,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
- [C(BPU)] = {
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
-};
-
-static inline unsigned long
-armv6_pmcr_read(void)
-{
- u32 val;
- asm volatile("mrc p15, 0, %0, c15, c12, 0" : "=r"(val));
- return val;
-}
-
-static inline void
-armv6_pmcr_write(unsigned long val)
-{
- asm volatile("mcr p15, 0, %0, c15, c12, 0" : : "r"(val));
-}
-
-#define ARMV6_PMCR_ENABLE (1 << 0)
-#define ARMV6_PMCR_CTR01_RESET (1 << 1)
-#define ARMV6_PMCR_CCOUNT_RESET (1 << 2)
-#define ARMV6_PMCR_CCOUNT_DIV (1 << 3)
-#define ARMV6_PMCR_COUNT0_IEN (1 << 4)
-#define ARMV6_PMCR_COUNT1_IEN (1 << 5)
-#define ARMV6_PMCR_CCOUNT_IEN (1 << 6)
-#define ARMV6_PMCR_COUNT0_OVERFLOW (1 << 8)
-#define ARMV6_PMCR_COUNT1_OVERFLOW (1 << 9)
-#define ARMV6_PMCR_CCOUNT_OVERFLOW (1 << 10)
-#define ARMV6_PMCR_EVT_COUNT0_SHIFT 20
-#define ARMV6_PMCR_EVT_COUNT0_MASK (0xFF << ARMV6_PMCR_EVT_COUNT0_SHIFT)
-#define ARMV6_PMCR_EVT_COUNT1_SHIFT 12
-#define ARMV6_PMCR_EVT_COUNT1_MASK (0xFF << ARMV6_PMCR_EVT_COUNT1_SHIFT)
-
-#define ARMV6_PMCR_OVERFLOWED_MASK \
- (ARMV6_PMCR_COUNT0_OVERFLOW | ARMV6_PMCR_COUNT1_OVERFLOW | \
- ARMV6_PMCR_CCOUNT_OVERFLOW)
-
-static inline int
-armv6_pmcr_has_overflowed(unsigned long pmcr)
-{
- return (pmcr & ARMV6_PMCR_OVERFLOWED_MASK);
-}
-
-static inline int
-armv6_pmcr_counter_has_overflowed(unsigned long pmcr,
- enum armv6_counters counter)
-{
- int ret = 0;
-
- if (ARMV6_CYCLE_COUNTER == counter)
- ret = pmcr & ARMV6_PMCR_CCOUNT_OVERFLOW;
- else if (ARMV6_COUNTER0 == counter)
- ret = pmcr & ARMV6_PMCR_COUNT0_OVERFLOW;
- else if (ARMV6_COUNTER1 == counter)
- ret = pmcr & ARMV6_PMCR_COUNT1_OVERFLOW;
- else
- WARN_ONCE(1, "invalid counter number (%d)\n", counter);
-
- return ret;
-}
-
-static inline u32
-armv6pmu_read_counter(int counter)
-{
- unsigned long value = 0;
-
- if (ARMV6_CYCLE_COUNTER == counter)
- asm volatile("mrc p15, 0, %0, c15, c12, 1" : "=r"(value));
- else if (ARMV6_COUNTER0 == counter)
- asm volatile("mrc p15, 0, %0, c15, c12, 2" : "=r"(value));
- else if (ARMV6_COUNTER1 == counter)
- asm volatile("mrc p15, 0, %0, c15, c12, 3" : "=r"(value));
- else
- WARN_ONCE(1, "invalid counter number (%d)\n", counter);
-
- return value;
-}
-
-static inline void
-armv6pmu_write_counter(int counter,
- u32 value)
-{
- if (ARMV6_CYCLE_COUNTER == counter)
- asm volatile("mcr p15, 0, %0, c15, c12, 1" : : "r"(value));
- else if (ARMV6_COUNTER0 == counter)
- asm volatile("mcr p15, 0, %0, c15, c12, 2" : : "r"(value));
- else if (ARMV6_COUNTER1 == counter)
- asm volatile("mcr p15, 0, %0, c15, c12, 3" : : "r"(value));
- else
- WARN_ONCE(1, "invalid counter number (%d)\n", counter);
-}
-
-void
-armv6pmu_enable_event(struct hw_perf_event *hwc,
- int idx)
-{
- unsigned long val, mask, evt, flags;
-
- if (ARMV6_CYCLE_COUNTER == idx) {
- mask = 0;
- evt = ARMV6_PMCR_CCOUNT_IEN;
- } else if (ARMV6_COUNTER0 == idx) {
- mask = ARMV6_PMCR_EVT_COUNT0_MASK;
- evt = (hwc->config_base << ARMV6_PMCR_EVT_COUNT0_SHIFT) |
- ARMV6_PMCR_COUNT0_IEN;
- } else if (ARMV6_COUNTER1 == idx) {
- mask = ARMV6_PMCR_EVT_COUNT1_MASK;
- evt = (hwc->config_base << ARMV6_PMCR_EVT_COUNT1_SHIFT) |
- ARMV6_PMCR_COUNT1_IEN;
- } else {
- WARN_ONCE(1, "invalid counter number (%d)\n", idx);
- return;
- }
-
- /*
- * Mask out the current event and set the counter to count the event
- * that we're interested in.
- */
- spin_lock_irqsave(&pmu_lock, flags);
- val = armv6_pmcr_read();
- val &= ~mask;
- val |= evt;
- armv6_pmcr_write(val);
- spin_unlock_irqrestore(&pmu_lock, flags);
-}
-
-static irqreturn_t
-armv6pmu_handle_irq(int irq_num,
- void *dev)
-{
- unsigned long pmcr = armv6_pmcr_read();
- struct perf_sample_data data;
- struct cpu_hw_events *cpuc;
- struct pt_regs *regs;
- int idx;
-
- if (!armv6_pmcr_has_overflowed(pmcr))
- return IRQ_NONE;
-
- regs = get_irq_regs();
-
- /*
- * The interrupts are cleared by writing the overflow flags back to
- * the control register. All of the other bits don't have any effect
- * if they are rewritten, so write the whole value back.
- */
- armv6_pmcr_write(pmcr);
-
- perf_sample_data_init(&data, 0);
-
- cpuc = &__get_cpu_var(cpu_hw_events);
- for (idx = 0; idx <= armpmu->num_events; ++idx) {
- struct perf_event *event = cpuc->events[idx];
- struct hw_perf_event *hwc;
-
- if (!test_bit(idx, cpuc->active_mask))
- continue;
-
- /*
- * We have a single interrupt for all counters. Check that
- * each counter has overflowed before we process it.
- */
- if (!armv6_pmcr_counter_has_overflowed(pmcr, idx))
- continue;
-
- hwc = &event->hw;
- armpmu_event_update(event, hwc, idx);
- data.period = event->hw.last_period;
- if (!armpmu_event_set_period(event, hwc, idx))
- continue;
-
- if (perf_event_overflow(event, 0, &data, regs))
- armpmu->disable(hwc, idx);
- }
-
- /*
- * Handle the pending perf events.
- *
- * Note: this call *must* be run with interrupts disabled. For
- * platforms that can have the PMU interrupts raised as an NMI, this
- * will not work.
- */
- irq_work_run();
-
- return IRQ_HANDLED;
-}
-
-static void
-armv6pmu_start(void)
-{
- unsigned long flags, val;
-
- spin_lock_irqsave(&pmu_lock, flags);
- val = armv6_pmcr_read();
- val |= ARMV6_PMCR_ENABLE;
- armv6_pmcr_write(val);
- spin_unlock_irqrestore(&pmu_lock, flags);
-}
-
-static void
-armv6pmu_stop(void)
-{
- unsigned long flags, val;
-
- spin_lock_irqsave(&pmu_lock, flags);
- val = armv6_pmcr_read();
- val &= ~ARMV6_PMCR_ENABLE;
- armv6_pmcr_write(val);
- spin_unlock_irqrestore(&pmu_lock, flags);
-}
-
-static int
-armv6pmu_get_event_idx(struct cpu_hw_events *cpuc,
- struct hw_perf_event *event)
-{
- /* Always place a cycle counter into the cycle counter. */
- if (ARMV6_PERFCTR_CPU_CYCLES == event->config_base) {
- if (test_and_set_bit(ARMV6_CYCLE_COUNTER, cpuc->used_mask))
- return -EAGAIN;
-
- return ARMV6_CYCLE_COUNTER;
- } else {
- /*
- * For anything other than a cycle counter, try and use
- * counter0 and counter1.
- */
- if (!test_and_set_bit(ARMV6_COUNTER1, cpuc->used_mask)) {
- return ARMV6_COUNTER1;
- }
-
- if (!test_and_set_bit(ARMV6_COUNTER0, cpuc->used_mask)) {
- return ARMV6_COUNTER0;
- }
-
- /* The counters are all in use. */
- return -EAGAIN;
- }
-}
-
-static void
-armv6pmu_disable_event(struct hw_perf_event *hwc,
- int idx)
-{
- unsigned long val, mask, evt, flags;
-
- if (ARMV6_CYCLE_COUNTER == idx) {
- mask = ARMV6_PMCR_CCOUNT_IEN;
- evt = 0;
- } else if (ARMV6_COUNTER0 == idx) {
- mask = ARMV6_PMCR_COUNT0_IEN | ARMV6_PMCR_EVT_COUNT0_MASK;
- evt = ARMV6_PERFCTR_NOP << ARMV6_PMCR_EVT_COUNT0_SHIFT;
- } else if (ARMV6_COUNTER1 == idx) {
- mask = ARMV6_PMCR_COUNT1_IEN | ARMV6_PMCR_EVT_COUNT1_MASK;
- evt = ARMV6_PERFCTR_NOP << ARMV6_PMCR_EVT_COUNT1_SHIFT;
- } else {
- WARN_ONCE(1, "invalid counter number (%d)\n", idx);
- return;
- }
-
- /*
- * Mask out the current event and set the counter to count the number
- * of ETM bus signal assertion cycles. The external reporting should
- * be disabled and so this should never increment.
- */
- spin_lock_irqsave(&pmu_lock, flags);
- val = armv6_pmcr_read();
- val &= ~mask;
- val |= evt;
- armv6_pmcr_write(val);
- spin_unlock_irqrestore(&pmu_lock, flags);
-}
-
-static void
-armv6mpcore_pmu_disable_event(struct hw_perf_event *hwc,
- int idx)
-{
- unsigned long val, mask, flags, evt = 0;
-
- if (ARMV6_CYCLE_COUNTER == idx) {
- mask = ARMV6_PMCR_CCOUNT_IEN;
- } else if (ARMV6_COUNTER0 == idx) {
- mask = ARMV6_PMCR_COUNT0_IEN;
- } else if (ARMV6_COUNTER1 == idx) {
- mask = ARMV6_PMCR_COUNT1_IEN;
- } else {
- WARN_ONCE(1, "invalid counter number (%d)\n", idx);
- return;
- }
-
- /*
- * Unlike UP ARMv6, we don't have a way of stopping the counters. We
- * simply disable the interrupt reporting.
- */
- spin_lock_irqsave(&pmu_lock, flags);
- val = armv6_pmcr_read();
- val &= ~mask;
- val |= evt;
- armv6_pmcr_write(val);
- spin_unlock_irqrestore(&pmu_lock, flags);
-}
-
-static const struct arm_pmu armv6pmu = {
- .id = ARM_PERF_PMU_ID_V6,
- .name = "v6",
- .handle_irq = armv6pmu_handle_irq,
- .enable = armv6pmu_enable_event,
- .disable = armv6pmu_disable_event,
- .read_counter = armv6pmu_read_counter,
- .write_counter = armv6pmu_write_counter,
- .get_event_idx = armv6pmu_get_event_idx,
- .start = armv6pmu_start,
- .stop = armv6pmu_stop,
- .cache_map = &armv6_perf_cache_map,
- .event_map = &armv6_perf_map,
- .raw_event_mask = 0xFF,
- .num_events = 3,
- .max_period = (1LLU << 32) - 1,
-};
-
-const struct arm_pmu *__init armv6pmu_init(void)
-{
- return &armv6pmu;
-}
-
-/*
- * ARMv6mpcore is almost identical to single core ARMv6 with the exception
- * that some of the events have different enumerations and that there is no
- * *hack* to stop the programmable counters. To stop the counters we simply
- * disable the interrupt reporting and update the event. When unthrottling we
- * reset the period and enable the interrupt reporting.
- */
-static const struct arm_pmu armv6mpcore_pmu = {
- .id = ARM_PERF_PMU_ID_V6MP,
- .name = "v6mpcore",
- .handle_irq = armv6pmu_handle_irq,
- .enable = armv6pmu_enable_event,
- .disable = armv6mpcore_pmu_disable_event,
- .read_counter = armv6pmu_read_counter,
- .write_counter = armv6pmu_write_counter,
- .get_event_idx = armv6pmu_get_event_idx,
- .start = armv6pmu_start,
- .stop = armv6pmu_stop,
- .cache_map = &armv6mpcore_perf_cache_map,
- .event_map = &armv6mpcore_perf_map,
- .raw_event_mask = 0xFF,
- .num_events = 3,
- .max_period = (1LLU << 32) - 1,
-};
-
-const struct arm_pmu *__init armv6mpcore_pmu_init(void)
-{
- return &armv6mpcore_pmu;
-}
-
-/*
- * ARMv7 Cortex-A8 and Cortex-A9 Performance Events handling code.
- *
- * Copied from ARMv6 code, with the low level code inspired
- * by the ARMv7 Oprofile code.
- *
- * Cortex-A8 has up to 4 configurable performance counters and
- * a single cycle counter.
- * Cortex-A9 has up to 31 configurable performance counters and
- * a single cycle counter.
- *
- * All counters can be enabled/disabled and IRQ masked separately. The cycle
- * counter and all 4 performance counters together can be reset separately.
- */
-
-/* Common ARMv7 event types */
-enum armv7_perf_types {
- ARMV7_PERFCTR_PMNC_SW_INCR = 0x00,
- ARMV7_PERFCTR_IFETCH_MISS = 0x01,
- ARMV7_PERFCTR_ITLB_MISS = 0x02,
- ARMV7_PERFCTR_DCACHE_REFILL = 0x03,
- ARMV7_PERFCTR_DCACHE_ACCESS = 0x04,
- ARMV7_PERFCTR_DTLB_REFILL = 0x05,
- ARMV7_PERFCTR_DREAD = 0x06,
- ARMV7_PERFCTR_DWRITE = 0x07,
-
- ARMV7_PERFCTR_EXC_TAKEN = 0x09,
- ARMV7_PERFCTR_EXC_EXECUTED = 0x0A,
- ARMV7_PERFCTR_CID_WRITE = 0x0B,
- /* ARMV7_PERFCTR_PC_WRITE is equivalent to HW_BRANCH_INSTRUCTIONS.
- * It counts:
- * - all branch instructions,
- * - instructions that explicitly write the PC,
- * - exception generating instructions.
- */
- ARMV7_PERFCTR_PC_WRITE = 0x0C,
- ARMV7_PERFCTR_PC_IMM_BRANCH = 0x0D,
- ARMV7_PERFCTR_UNALIGNED_ACCESS = 0x0F,
- ARMV7_PERFCTR_PC_BRANCH_MIS_PRED = 0x10,
- ARMV7_PERFCTR_CLOCK_CYCLES = 0x11,
-
- ARMV7_PERFCTR_PC_BRANCH_MIS_USED = 0x12,
-
- ARMV7_PERFCTR_CPU_CYCLES = 0xFF
-};
-
-/* ARMv7 Cortex-A8 specific event types */
-enum armv7_a8_perf_types {
- ARMV7_PERFCTR_INSTR_EXECUTED = 0x08,
-
- ARMV7_PERFCTR_PC_PROC_RETURN = 0x0E,
-
- ARMV7_PERFCTR_WRITE_BUFFER_FULL = 0x40,
- ARMV7_PERFCTR_L2_STORE_MERGED = 0x41,
- ARMV7_PERFCTR_L2_STORE_BUFF = 0x42,
- ARMV7_PERFCTR_L2_ACCESS = 0x43,
- ARMV7_PERFCTR_L2_CACH_MISS = 0x44,
- ARMV7_PERFCTR_AXI_READ_CYCLES = 0x45,
- ARMV7_PERFCTR_AXI_WRITE_CYCLES = 0x46,
- ARMV7_PERFCTR_MEMORY_REPLAY = 0x47,
- ARMV7_PERFCTR_UNALIGNED_ACCESS_REPLAY = 0x48,
- ARMV7_PERFCTR_L1_DATA_MISS = 0x49,
- ARMV7_PERFCTR_L1_INST_MISS = 0x4A,
- ARMV7_PERFCTR_L1_DATA_COLORING = 0x4B,
- ARMV7_PERFCTR_L1_NEON_DATA = 0x4C,
- ARMV7_PERFCTR_L1_NEON_CACH_DATA = 0x4D,
- ARMV7_PERFCTR_L2_NEON = 0x4E,
- ARMV7_PERFCTR_L2_NEON_HIT = 0x4F,
- ARMV7_PERFCTR_L1_INST = 0x50,
- ARMV7_PERFCTR_PC_RETURN_MIS_PRED = 0x51,
- ARMV7_PERFCTR_PC_BRANCH_FAILED = 0x52,
- ARMV7_PERFCTR_PC_BRANCH_TAKEN = 0x53,
- ARMV7_PERFCTR_PC_BRANCH_EXECUTED = 0x54,
- ARMV7_PERFCTR_OP_EXECUTED = 0x55,
- ARMV7_PERFCTR_CYCLES_INST_STALL = 0x56,
- ARMV7_PERFCTR_CYCLES_INST = 0x57,
- ARMV7_PERFCTR_CYCLES_NEON_DATA_STALL = 0x58,
- ARMV7_PERFCTR_CYCLES_NEON_INST_STALL = 0x59,
- ARMV7_PERFCTR_NEON_CYCLES = 0x5A,
-
- ARMV7_PERFCTR_PMU0_EVENTS = 0x70,
- ARMV7_PERFCTR_PMU1_EVENTS = 0x71,
- ARMV7_PERFCTR_PMU_EVENTS = 0x72,
-};
-
-/* ARMv7 Cortex-A9 specific event types */
-enum armv7_a9_perf_types {
- ARMV7_PERFCTR_JAVA_HW_BYTECODE_EXEC = 0x40,
- ARMV7_PERFCTR_JAVA_SW_BYTECODE_EXEC = 0x41,
- ARMV7_PERFCTR_JAZELLE_BRANCH_EXEC = 0x42,
-
- ARMV7_PERFCTR_COHERENT_LINE_MISS = 0x50,
- ARMV7_PERFCTR_COHERENT_LINE_HIT = 0x51,
-
- ARMV7_PERFCTR_ICACHE_DEP_STALL_CYCLES = 0x60,
- ARMV7_PERFCTR_DCACHE_DEP_STALL_CYCLES = 0x61,
- ARMV7_PERFCTR_TLB_MISS_DEP_STALL_CYCLES = 0x62,
- ARMV7_PERFCTR_STREX_EXECUTED_PASSED = 0x63,
- ARMV7_PERFCTR_STREX_EXECUTED_FAILED = 0x64,
- ARMV7_PERFCTR_DATA_EVICTION = 0x65,
- ARMV7_PERFCTR_ISSUE_STAGE_NO_INST = 0x66,
- ARMV7_PERFCTR_ISSUE_STAGE_EMPTY = 0x67,
- ARMV7_PERFCTR_INST_OUT_OF_RENAME_STAGE = 0x68,
-
- ARMV7_PERFCTR_PREDICTABLE_FUNCT_RETURNS = 0x6E,
-
- ARMV7_PERFCTR_MAIN_UNIT_EXECUTED_INST = 0x70,
- ARMV7_PERFCTR_SECOND_UNIT_EXECUTED_INST = 0x71,
- ARMV7_PERFCTR_LD_ST_UNIT_EXECUTED_INST = 0x72,
- ARMV7_PERFCTR_FP_EXECUTED_INST = 0x73,
- ARMV7_PERFCTR_NEON_EXECUTED_INST = 0x74,
-
- ARMV7_PERFCTR_PLD_FULL_DEP_STALL_CYCLES = 0x80,
- ARMV7_PERFCTR_DATA_WR_DEP_STALL_CYCLES = 0x81,
- ARMV7_PERFCTR_ITLB_MISS_DEP_STALL_CYCLES = 0x82,
- ARMV7_PERFCTR_DTLB_MISS_DEP_STALL_CYCLES = 0x83,
- ARMV7_PERFCTR_MICRO_ITLB_MISS_DEP_STALL_CYCLES = 0x84,
- ARMV7_PERFCTR_MICRO_DTLB_MISS_DEP_STALL_CYCLES = 0x85,
- ARMV7_PERFCTR_DMB_DEP_STALL_CYCLES = 0x86,
-
- ARMV7_PERFCTR_INTGR_CLK_ENABLED_CYCLES = 0x8A,
- ARMV7_PERFCTR_DATA_ENGINE_CLK_EN_CYCLES = 0x8B,
-
- ARMV7_PERFCTR_ISB_INST = 0x90,
- ARMV7_PERFCTR_DSB_INST = 0x91,
- ARMV7_PERFCTR_DMB_INST = 0x92,
- ARMV7_PERFCTR_EXT_INTERRUPTS = 0x93,
-
- ARMV7_PERFCTR_PLE_CACHE_LINE_RQST_COMPLETED = 0xA0,
- ARMV7_PERFCTR_PLE_CACHE_LINE_RQST_SKIPPED = 0xA1,
- ARMV7_PERFCTR_PLE_FIFO_FLUSH = 0xA2,
- ARMV7_PERFCTR_PLE_RQST_COMPLETED = 0xA3,
- ARMV7_PERFCTR_PLE_FIFO_OVERFLOW = 0xA4,
- ARMV7_PERFCTR_PLE_RQST_PROG = 0xA5
-};
-
-/*
- * Cortex-A8 HW events mapping
- *
- * The hardware events that we support. We do support cache operations but
- * we have harvard caches and no way to combine instruction and data
- * accesses/misses in hardware.
- */
-static const unsigned armv7_a8_perf_map[PERF_COUNT_HW_MAX] = {
- [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES,
- [PERF_COUNT_HW_INSTRUCTIONS] = ARMV7_PERFCTR_INSTR_EXECUTED,
- [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED,
- [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED,
- [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE,
- [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
- [PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_CLOCK_CYCLES,
-};
-
-static const unsigned armv7_a8_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
- [PERF_COUNT_HW_CACHE_OP_MAX]
- [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
- [C(L1D)] = {
- /*
- * The performance counters don't differentiate between read
- * and write accesses/misses so this isn't strictly correct,
- * but it's the best we can do. Writes and reads get
- * combined.
- */
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS,
- [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS,
- [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
- [C(L1I)] = {
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_INST,
- [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_INST_MISS,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_INST,
- [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_INST_MISS,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
- [C(LL)] = {
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L2_ACCESS,
- [C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACH_MISS,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L2_ACCESS,
- [C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACH_MISS,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
- [C(DTLB)] = {
- /*
- * Only ITLB misses and DTLB refills are supported.
- * If users want the DTLB refills misses a raw counter
- * must be used.
- */
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
- [C(ITLB)] = {
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
- [C(BPU)] = {
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE,
- [C(RESULT_MISS)]
- = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE,
- [C(RESULT_MISS)]
- = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
-};
-
-/*
- * Cortex-A9 HW events mapping
- */
-static const unsigned armv7_a9_perf_map[PERF_COUNT_HW_MAX] = {
- [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES,
- [PERF_COUNT_HW_INSTRUCTIONS] =
- ARMV7_PERFCTR_INST_OUT_OF_RENAME_STAGE,
- [PERF_COUNT_HW_CACHE_REFERENCES] = ARMV7_PERFCTR_COHERENT_LINE_HIT,
- [PERF_COUNT_HW_CACHE_MISSES] = ARMV7_PERFCTR_COHERENT_LINE_MISS,
- [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE,
- [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
- [PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_CLOCK_CYCLES,
-};
-
-static const unsigned armv7_a9_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
- [PERF_COUNT_HW_CACHE_OP_MAX]
- [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
- [C(L1D)] = {
- /*
- * The performance counters don't differentiate between read
- * and write accesses/misses so this isn't strictly correct,
- * but it's the best we can do. Writes and reads get
- * combined.
- */
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS,
- [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS,
- [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
- [C(L1I)] = {
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = ARMV7_PERFCTR_IFETCH_MISS,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = ARMV7_PERFCTR_IFETCH_MISS,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
- [C(LL)] = {
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
- [C(DTLB)] = {
- /*
- * Only ITLB misses and DTLB refills are supported.
- * If users want the DTLB refills misses a raw counter
- * must be used.
- */
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
- [C(ITLB)] = {
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
- [C(BPU)] = {
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE,
- [C(RESULT_MISS)]
- = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE,
- [C(RESULT_MISS)]
- = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
-};
-
-/*
- * Perf Events counters
- */
-enum armv7_counters {
- ARMV7_CYCLE_COUNTER = 1, /* Cycle counter */
- ARMV7_COUNTER0 = 2, /* First event counter */
-};
-
-/*
- * The cycle counter is ARMV7_CYCLE_COUNTER.
- * The first event counter is ARMV7_COUNTER0.
- * The last event counter is (ARMV7_COUNTER0 + armpmu->num_events - 1).
- */
-#define ARMV7_COUNTER_LAST (ARMV7_COUNTER0 + armpmu->num_events - 1)
-
-/*
- * ARMv7 low level PMNC access
- */
-
-/*
- * Per-CPU PMNC: config reg
- */
-#define ARMV7_PMNC_E (1 << 0) /* Enable all counters */
-#define ARMV7_PMNC_P (1 << 1) /* Reset all counters */
-#define ARMV7_PMNC_C (1 << 2) /* Cycle counter reset */
-#define ARMV7_PMNC_D (1 << 3) /* CCNT counts every 64th cpu cycle */
-#define ARMV7_PMNC_X (1 << 4) /* Export to ETM */
-#define ARMV7_PMNC_DP (1 << 5) /* Disable CCNT if non-invasive debug*/
-#define ARMV7_PMNC_N_SHIFT 11 /* Number of counters supported */
-#define ARMV7_PMNC_N_MASK 0x1f
-#define ARMV7_PMNC_MASK 0x3f /* Mask for writable bits */
-
-/*
- * Available counters
- */
-#define ARMV7_CNT0 0 /* First event counter */
-#define ARMV7_CCNT 31 /* Cycle counter */
-
-/* Perf Event to low level counters mapping */
-#define ARMV7_EVENT_CNT_TO_CNTx (ARMV7_COUNTER0 - ARMV7_CNT0)
-
-/*
- * CNTENS: counters enable reg
- */
-#define ARMV7_CNTENS_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
-#define ARMV7_CNTENS_C (1 << ARMV7_CCNT)
-
-/*
- * CNTENC: counters disable reg
- */
-#define ARMV7_CNTENC_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
-#define ARMV7_CNTENC_C (1 << ARMV7_CCNT)
-
-/*
- * INTENS: counters overflow interrupt enable reg
- */
-#define ARMV7_INTENS_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
-#define ARMV7_INTENS_C (1 << ARMV7_CCNT)
-
-/*
- * INTENC: counters overflow interrupt disable reg
- */
-#define ARMV7_INTENC_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
-#define ARMV7_INTENC_C (1 << ARMV7_CCNT)
-
-/*
- * EVTSEL: Event selection reg
- */
-#define ARMV7_EVTSEL_MASK 0xff /* Mask for writable bits */
-
-/*
- * SELECT: Counter selection reg
- */
-#define ARMV7_SELECT_MASK 0x1f /* Mask for writable bits */
-
-/*
- * FLAG: counters overflow flag status reg
- */
-#define ARMV7_FLAG_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
-#define ARMV7_FLAG_C (1 << ARMV7_CCNT)
-#define ARMV7_FLAG_MASK 0xffffffff /* Mask for writable bits */
-#define ARMV7_OVERFLOWED_MASK ARMV7_FLAG_MASK
-
-static inline unsigned long armv7_pmnc_read(void)
-{
- u32 val;
- asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r"(val));
- return val;
-}
-
-static inline void armv7_pmnc_write(unsigned long val)
-{
- val &= ARMV7_PMNC_MASK;
- asm volatile("mcr p15, 0, %0, c9, c12, 0" : : "r"(val));
-}
-
-static inline int armv7_pmnc_has_overflowed(unsigned long pmnc)
-{
- return pmnc & ARMV7_OVERFLOWED_MASK;
-}
-
-static inline int armv7_pmnc_counter_has_overflowed(unsigned long pmnc,
- enum armv7_counters counter)
-{
- int ret = 0;
-
- if (counter == ARMV7_CYCLE_COUNTER)
- ret = pmnc & ARMV7_FLAG_C;
- else if ((counter >= ARMV7_COUNTER0) && (counter <= ARMV7_COUNTER_LAST))
- ret = pmnc & ARMV7_FLAG_P(counter);
- else
- pr_err("CPU%u checking wrong counter %d overflow status\n",
- smp_processor_id(), counter);
-
- return ret;
-}
-
-static inline int armv7_pmnc_select_counter(unsigned int idx)
-{
- u32 val;
-
- if ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST)) {
- pr_err("CPU%u selecting wrong PMNC counter"
- " %d\n", smp_processor_id(), idx);
- return -1;
- }
-
- val = (idx - ARMV7_EVENT_CNT_TO_CNTx) & ARMV7_SELECT_MASK;
- asm volatile("mcr p15, 0, %0, c9, c12, 5" : : "r" (val));
-
- return idx;
-}
-
-static inline u32 armv7pmu_read_counter(int idx)
-{
- unsigned long value = 0;
-
- if (idx == ARMV7_CYCLE_COUNTER)
- asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (value));
- else if ((idx >= ARMV7_COUNTER0) && (idx <= ARMV7_COUNTER_LAST)) {
- if (armv7_pmnc_select_counter(idx) == idx)
- asm volatile("mrc p15, 0, %0, c9, c13, 2"
- : "=r" (value));
- } else
- pr_err("CPU%u reading wrong counter %d\n",
- smp_processor_id(), idx);
-
- return value;
-}
-
-static inline void armv7pmu_write_counter(int idx, u32 value)
-{
- if (idx == ARMV7_CYCLE_COUNTER)
- asm volatile("mcr p15, 0, %0, c9, c13, 0" : : "r" (value));
- else if ((idx >= ARMV7_COUNTER0) && (idx <= ARMV7_COUNTER_LAST)) {
- if (armv7_pmnc_select_counter(idx) == idx)
- asm volatile("mcr p15, 0, %0, c9, c13, 2"
- : : "r" (value));
- } else
- pr_err("CPU%u writing wrong counter %d\n",
- smp_processor_id(), idx);
-}
-
-static inline void armv7_pmnc_write_evtsel(unsigned int idx, u32 val)
-{
- if (armv7_pmnc_select_counter(idx) == idx) {
- val &= ARMV7_EVTSEL_MASK;
- asm volatile("mcr p15, 0, %0, c9, c13, 1" : : "r" (val));
- }
-}
-
-static inline u32 armv7_pmnc_enable_counter(unsigned int idx)
-{
- u32 val;
-
- if ((idx != ARMV7_CYCLE_COUNTER) &&
- ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) {
- pr_err("CPU%u enabling wrong PMNC counter"
- " %d\n", smp_processor_id(), idx);
- return -1;
- }
-
- if (idx == ARMV7_CYCLE_COUNTER)
- val = ARMV7_CNTENS_C;
- else
- val = ARMV7_CNTENS_P(idx);
-
- asm volatile("mcr p15, 0, %0, c9, c12, 1" : : "r" (val));
-
- return idx;
-}
-
-static inline u32 armv7_pmnc_disable_counter(unsigned int idx)
-{
- u32 val;
-
-
- if ((idx != ARMV7_CYCLE_COUNTER) &&
- ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) {
- pr_err("CPU%u disabling wrong PMNC counter"
- " %d\n", smp_processor_id(), idx);
- return -1;
- }
-
- if (idx == ARMV7_CYCLE_COUNTER)
- val = ARMV7_CNTENC_C;
- else
- val = ARMV7_CNTENC_P(idx);
-
- asm volatile("mcr p15, 0, %0, c9, c12, 2" : : "r" (val));
-
- return idx;
-}
-
-static inline u32 armv7_pmnc_enable_intens(unsigned int idx)
-{
- u32 val;
-
- if ((idx != ARMV7_CYCLE_COUNTER) &&
- ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) {
- pr_err("CPU%u enabling wrong PMNC counter"
- " interrupt enable %d\n", smp_processor_id(), idx);
- return -1;
- }
-
- if (idx == ARMV7_CYCLE_COUNTER)
- val = ARMV7_INTENS_C;
- else
- val = ARMV7_INTENS_P(idx);
-
- asm volatile("mcr p15, 0, %0, c9, c14, 1" : : "r" (val));
-
- return idx;
-}
-
-static inline u32 armv7_pmnc_disable_intens(unsigned int idx)
-{
- u32 val;
-
- if ((idx != ARMV7_CYCLE_COUNTER) &&
- ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) {
- pr_err("CPU%u disabling wrong PMNC counter"
- " interrupt enable %d\n", smp_processor_id(), idx);
- return -1;
- }
-
- if (idx == ARMV7_CYCLE_COUNTER)
- val = ARMV7_INTENC_C;
- else
- val = ARMV7_INTENC_P(idx);
-
- asm volatile("mcr p15, 0, %0, c9, c14, 2" : : "r" (val));
-
- return idx;
-}
-
-static inline u32 armv7_pmnc_getreset_flags(void)
-{
- u32 val;
-
- /* Read */
- asm volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (val));
-
- /* Write to clear flags */
- val &= ARMV7_FLAG_MASK;
- asm volatile("mcr p15, 0, %0, c9, c12, 3" : : "r" (val));
-
- return val;
-}
-
-#ifdef DEBUG
-static void armv7_pmnc_dump_regs(void)
-{
- u32 val;
- unsigned int cnt;
-
- printk(KERN_INFO "PMNC registers dump:\n");
-
- asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r" (val));
- printk(KERN_INFO "PMNC =0x%08x\n", val);
-
- asm volatile("mrc p15, 0, %0, c9, c12, 1" : "=r" (val));
- printk(KERN_INFO "CNTENS=0x%08x\n", val);
-
- asm volatile("mrc p15, 0, %0, c9, c14, 1" : "=r" (val));
- printk(KERN_INFO "INTENS=0x%08x\n", val);
-
- asm volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (val));
- printk(KERN_INFO "FLAGS =0x%08x\n", val);
-
- asm volatile("mrc p15, 0, %0, c9, c12, 5" : "=r" (val));
- printk(KERN_INFO "SELECT=0x%08x\n", val);
-
- asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (val));
- printk(KERN_INFO "CCNT =0x%08x\n", val);
-
- for (cnt = ARMV7_COUNTER0; cnt < ARMV7_COUNTER_LAST; cnt++) {
- armv7_pmnc_select_counter(cnt);
- asm volatile("mrc p15, 0, %0, c9, c13, 2" : "=r" (val));
- printk(KERN_INFO "CNT[%d] count =0x%08x\n",
- cnt-ARMV7_EVENT_CNT_TO_CNTx, val);
- asm volatile("mrc p15, 0, %0, c9, c13, 1" : "=r" (val));
- printk(KERN_INFO "CNT[%d] evtsel=0x%08x\n",
- cnt-ARMV7_EVENT_CNT_TO_CNTx, val);
- }
-}
-#endif
-
-void armv7pmu_enable_event(struct hw_perf_event *hwc, int idx)
-{
- unsigned long flags;
-
- /*
- * Enable counter and interrupt, and set the counter to count
- * the event that we're interested in.
- */
- spin_lock_irqsave(&pmu_lock, flags);
-
- /*
- * Disable counter
- */
- armv7_pmnc_disable_counter(idx);
-
- /*
- * Set event (if destined for PMNx counters)
- * We don't need to set the event if it's a cycle count
- */
- if (idx != ARMV7_CYCLE_COUNTER)
- armv7_pmnc_write_evtsel(idx, hwc->config_base);
-
- /*
- * Enable interrupt for this counter
- */
- armv7_pmnc_enable_intens(idx);
-
- /*
- * Enable counter
- */
- armv7_pmnc_enable_counter(idx);
-
- spin_unlock_irqrestore(&pmu_lock, flags);
-}
-
-static void armv7pmu_disable_event(struct hw_perf_event *hwc, int idx)
-{
- unsigned long flags;
-
- /*
- * Disable counter and interrupt
- */
- spin_lock_irqsave(&pmu_lock, flags);
-
- /*
- * Disable counter
- */
- armv7_pmnc_disable_counter(idx);
-
- /*
- * Disable interrupt for this counter
- */
- armv7_pmnc_disable_intens(idx);
-
- spin_unlock_irqrestore(&pmu_lock, flags);
-}
-
-static irqreturn_t armv7pmu_handle_irq(int irq_num, void *dev)
-{
- unsigned long pmnc;
- struct perf_sample_data data;
- struct cpu_hw_events *cpuc;
- struct pt_regs *regs;
- int idx;
-
- /*
- * Get and reset the IRQ flags
- */
- pmnc = armv7_pmnc_getreset_flags();
-
- /*
- * Did an overflow occur?
- */
- if (!armv7_pmnc_has_overflowed(pmnc))
- return IRQ_NONE;
-
- /*
- * Handle the counter(s) overflow(s)
- */
- regs = get_irq_regs();
-
- perf_sample_data_init(&data, 0);
-
- cpuc = &__get_cpu_var(cpu_hw_events);
- for (idx = 0; idx <= armpmu->num_events; ++idx) {
- struct perf_event *event = cpuc->events[idx];
- struct hw_perf_event *hwc;
-
- if (!test_bit(idx, cpuc->active_mask))
- continue;
-
- /*
- * We have a single interrupt for all counters. Check that
- * each counter has overflowed before we process it.
- */
- if (!armv7_pmnc_counter_has_overflowed(pmnc, idx))
- continue;
-
- hwc = &event->hw;
- armpmu_event_update(event, hwc, idx);
- data.period = event->hw.last_period;
- if (!armpmu_event_set_period(event, hwc, idx))
- continue;
-
- if (perf_event_overflow(event, 0, &data, regs))
- armpmu->disable(hwc, idx);
- }
-
- /*
- * Handle the pending perf events.
- *
- * Note: this call *must* be run with interrupts disabled. For
- * platforms that can have the PMU interrupts raised as an NMI, this
- * will not work.
- */
- irq_work_run();
-
- return IRQ_HANDLED;
-}
-
-static void armv7pmu_start(void)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&pmu_lock, flags);
- /* Enable all counters */
- armv7_pmnc_write(armv7_pmnc_read() | ARMV7_PMNC_E);
- spin_unlock_irqrestore(&pmu_lock, flags);
-}
-
-static void armv7pmu_stop(void)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&pmu_lock, flags);
- /* Disable all counters */
- armv7_pmnc_write(armv7_pmnc_read() & ~ARMV7_PMNC_E);
- spin_unlock_irqrestore(&pmu_lock, flags);
-}
-
-static int armv7pmu_get_event_idx(struct cpu_hw_events *cpuc,
- struct hw_perf_event *event)
-{
- int idx;
-
- /* Always place a cycle counter into the cycle counter. */
- if (event->config_base == ARMV7_PERFCTR_CPU_CYCLES) {
- if (test_and_set_bit(ARMV7_CYCLE_COUNTER, cpuc->used_mask))
- return -EAGAIN;
-
- return ARMV7_CYCLE_COUNTER;
- } else {
- /*
- * For anything other than a cycle counter, try and use
- * the events counters
- */
- for (idx = ARMV7_COUNTER0; idx <= armpmu->num_events; ++idx) {
- if (!test_and_set_bit(idx, cpuc->used_mask))
- return idx;
- }
-
- /* The counters are all in use. */
- return -EAGAIN;
- }
-}
-
-static struct arm_pmu armv7pmu = {
- .handle_irq = armv7pmu_handle_irq,
- .enable = armv7pmu_enable_event,
- .disable = armv7pmu_disable_event,
- .read_counter = armv7pmu_read_counter,
- .write_counter = armv7pmu_write_counter,
- .get_event_idx = armv7pmu_get_event_idx,
- .start = armv7pmu_start,
- .stop = armv7pmu_stop,
- .raw_event_mask = 0xFF,
- .max_period = (1LLU << 32) - 1,
-};
-
-static u32 __init armv7_reset_read_pmnc(void)
-{
- u32 nb_cnt;
-
- /* Initialize & Reset PMNC: C and P bits */
- armv7_pmnc_write(ARMV7_PMNC_P | ARMV7_PMNC_C);
-
- /* Read the nb of CNTx counters supported from PMNC */
- nb_cnt = (armv7_pmnc_read() >> ARMV7_PMNC_N_SHIFT) & ARMV7_PMNC_N_MASK;
-
- /* Add the CPU cycles counter and return */
- return nb_cnt + 1;
-}
-
-const struct arm_pmu *__init armv7_a8_pmu_init(void)
-{
- armv7pmu.id = ARM_PERF_PMU_ID_CA8;
- armv7pmu.name = "ARMv7 Cortex-A8";
- armv7pmu.cache_map = &armv7_a8_perf_cache_map;
- armv7pmu.event_map = &armv7_a8_perf_map;
- armv7pmu.num_events = armv7_reset_read_pmnc();
- return &armv7pmu;
-}
-
-const struct arm_pmu *__init armv7_a9_pmu_init(void)
-{
- armv7pmu.id = ARM_PERF_PMU_ID_CA9;
- armv7pmu.name = "ARMv7 Cortex-A9";
- armv7pmu.cache_map = &armv7_a9_perf_cache_map;
- armv7pmu.event_map = &armv7_a9_perf_map;
- armv7pmu.num_events = armv7_reset_read_pmnc();
- return &armv7pmu;
-}
-
-
-/*
- * ARMv5 [xscale] Performance counter handling code.
- *
- * Based on xscale OProfile code.
- *
- * There are two variants of the xscale PMU that we support:
- * - xscale1pmu: 2 event counters and a cycle counter
- * - xscale2pmu: 4 event counters and a cycle counter
- * The two variants share event definitions, but have different
- * PMU structures.
- */
-
-enum xscale_perf_types {
- XSCALE_PERFCTR_ICACHE_MISS = 0x00,
- XSCALE_PERFCTR_ICACHE_NO_DELIVER = 0x01,
- XSCALE_PERFCTR_DATA_STALL = 0x02,
- XSCALE_PERFCTR_ITLB_MISS = 0x03,
- XSCALE_PERFCTR_DTLB_MISS = 0x04,
- XSCALE_PERFCTR_BRANCH = 0x05,
- XSCALE_PERFCTR_BRANCH_MISS = 0x06,
- XSCALE_PERFCTR_INSTRUCTION = 0x07,
- XSCALE_PERFCTR_DCACHE_FULL_STALL = 0x08,
- XSCALE_PERFCTR_DCACHE_FULL_STALL_CONTIG = 0x09,
- XSCALE_PERFCTR_DCACHE_ACCESS = 0x0A,
- XSCALE_PERFCTR_DCACHE_MISS = 0x0B,
- XSCALE_PERFCTR_DCACHE_WRITE_BACK = 0x0C,
- XSCALE_PERFCTR_PC_CHANGED = 0x0D,
- XSCALE_PERFCTR_BCU_REQUEST = 0x10,
- XSCALE_PERFCTR_BCU_FULL = 0x11,
- XSCALE_PERFCTR_BCU_DRAIN = 0x12,
- XSCALE_PERFCTR_BCU_ECC_NO_ELOG = 0x14,
- XSCALE_PERFCTR_BCU_1_BIT_ERR = 0x15,
- XSCALE_PERFCTR_RMW = 0x16,
- /* XSCALE_PERFCTR_CCNT is not hardware defined */
- XSCALE_PERFCTR_CCNT = 0xFE,
- XSCALE_PERFCTR_UNUSED = 0xFF,
-};
-
-enum xscale_counters {
- XSCALE_CYCLE_COUNTER = 1,
- XSCALE_COUNTER0,
- XSCALE_COUNTER1,
- XSCALE_COUNTER2,
- XSCALE_COUNTER3,
-};
-
-static const unsigned xscale_perf_map[PERF_COUNT_HW_MAX] = {
- [PERF_COUNT_HW_CPU_CYCLES] = XSCALE_PERFCTR_CCNT,
- [PERF_COUNT_HW_INSTRUCTIONS] = XSCALE_PERFCTR_INSTRUCTION,
- [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED,
- [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED,
- [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = XSCALE_PERFCTR_BRANCH,
- [PERF_COUNT_HW_BRANCH_MISSES] = XSCALE_PERFCTR_BRANCH_MISS,
- [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED,
-};
-
-static const unsigned xscale_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
- [PERF_COUNT_HW_CACHE_OP_MAX]
- [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
- [C(L1D)] = {
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = XSCALE_PERFCTR_DCACHE_ACCESS,
- [C(RESULT_MISS)] = XSCALE_PERFCTR_DCACHE_MISS,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = XSCALE_PERFCTR_DCACHE_ACCESS,
- [C(RESULT_MISS)] = XSCALE_PERFCTR_DCACHE_MISS,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
- [C(L1I)] = {
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = XSCALE_PERFCTR_ICACHE_MISS,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = XSCALE_PERFCTR_ICACHE_MISS,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
- [C(LL)] = {
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
- [C(DTLB)] = {
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = XSCALE_PERFCTR_DTLB_MISS,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = XSCALE_PERFCTR_DTLB_MISS,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
- [C(ITLB)] = {
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = XSCALE_PERFCTR_ITLB_MISS,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = XSCALE_PERFCTR_ITLB_MISS,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
- [C(BPU)] = {
- [C(OP_READ)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- [C(OP_WRITE)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- [C(OP_PREFETCH)] = {
- [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
- [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
- },
- },
-};
-
-#define XSCALE_PMU_ENABLE 0x001
-#define XSCALE_PMN_RESET 0x002
-#define XSCALE_CCNT_RESET 0x004
-#define XSCALE_PMU_RESET (CCNT_RESET | PMN_RESET)
-#define XSCALE_PMU_CNT64 0x008
-
-#define XSCALE1_OVERFLOWED_MASK 0x700
-#define XSCALE1_CCOUNT_OVERFLOW 0x400
-#define XSCALE1_COUNT0_OVERFLOW 0x100
-#define XSCALE1_COUNT1_OVERFLOW 0x200
-#define XSCALE1_CCOUNT_INT_EN 0x040
-#define XSCALE1_COUNT0_INT_EN 0x010
-#define XSCALE1_COUNT1_INT_EN 0x020
-#define XSCALE1_COUNT0_EVT_SHFT 12
-#define XSCALE1_COUNT0_EVT_MASK (0xff << XSCALE1_COUNT0_EVT_SHFT)
-#define XSCALE1_COUNT1_EVT_SHFT 20
-#define XSCALE1_COUNT1_EVT_MASK (0xff << XSCALE1_COUNT1_EVT_SHFT)
-
-static inline u32
-xscale1pmu_read_pmnc(void)
-{
- u32 val;
- asm volatile("mrc p14, 0, %0, c0, c0, 0" : "=r" (val));
- return val;
-}
-
-static inline void
-xscale1pmu_write_pmnc(u32 val)
-{
- /* upper 4bits and 7, 11 are write-as-0 */
- val &= 0xffff77f;
- asm volatile("mcr p14, 0, %0, c0, c0, 0" : : "r" (val));
-}
-
-static inline int
-xscale1_pmnc_counter_has_overflowed(unsigned long pmnc,
- enum xscale_counters counter)
-{
- int ret = 0;
-
- switch (counter) {
- case XSCALE_CYCLE_COUNTER:
- ret = pmnc & XSCALE1_CCOUNT_OVERFLOW;
- break;
- case XSCALE_COUNTER0:
- ret = pmnc & XSCALE1_COUNT0_OVERFLOW;
- break;
- case XSCALE_COUNTER1:
- ret = pmnc & XSCALE1_COUNT1_OVERFLOW;
- break;
- default:
- WARN_ONCE(1, "invalid counter number (%d)\n", counter);
- }
-
- return ret;
-}
-
-static irqreturn_t
-xscale1pmu_handle_irq(int irq_num, void *dev)
-{
- unsigned long pmnc;
- struct perf_sample_data data;
- struct cpu_hw_events *cpuc;
- struct pt_regs *regs;
- int idx;
-
- /*
- * NOTE: there's an A stepping erratum that states if an overflow
- * bit already exists and another occurs, the previous
- * Overflow bit gets cleared. There's no workaround.
- * Fixed in B stepping or later.
- */
- pmnc = xscale1pmu_read_pmnc();
-
- /*
- * Write the value back to clear the overflow flags. Overflow
- * flags remain in pmnc for use below. We also disable the PMU
- * while we process the interrupt.
- */
- xscale1pmu_write_pmnc(pmnc & ~XSCALE_PMU_ENABLE);
-
- if (!(pmnc & XSCALE1_OVERFLOWED_MASK))
- return IRQ_NONE;
-
- regs = get_irq_regs();
-
- perf_sample_data_init(&data, 0);
-
- cpuc = &__get_cpu_var(cpu_hw_events);
- for (idx = 0; idx <= armpmu->num_events; ++idx) {
- struct perf_event *event = cpuc->events[idx];
- struct hw_perf_event *hwc;
-
- if (!test_bit(idx, cpuc->active_mask))
- continue;
-
- if (!xscale1_pmnc_counter_has_overflowed(pmnc, idx))
- continue;
-
- hwc = &event->hw;
- armpmu_event_update(event, hwc, idx);
- data.period = event->hw.last_period;
- if (!armpmu_event_set_period(event, hwc, idx))
- continue;
-
- if (perf_event_overflow(event, 0, &data, regs))
- armpmu->disable(hwc, idx);
- }
-
- irq_work_run();
-
- /*
- * Re-enable the PMU.
- */
- pmnc = xscale1pmu_read_pmnc() | XSCALE_PMU_ENABLE;
- xscale1pmu_write_pmnc(pmnc);
-
- return IRQ_HANDLED;
-}
-
-static void
-xscale1pmu_enable_event(struct hw_perf_event *hwc, int idx)
-{
- unsigned long val, mask, evt, flags;
-
- switch (idx) {
- case XSCALE_CYCLE_COUNTER:
- mask = 0;
- evt = XSCALE1_CCOUNT_INT_EN;
- break;
- case XSCALE_COUNTER0:
- mask = XSCALE1_COUNT0_EVT_MASK;
- evt = (hwc->config_base << XSCALE1_COUNT0_EVT_SHFT) |
- XSCALE1_COUNT0_INT_EN;
- break;
- case XSCALE_COUNTER1:
- mask = XSCALE1_COUNT1_EVT_MASK;
- evt = (hwc->config_base << XSCALE1_COUNT1_EVT_SHFT) |
- XSCALE1_COUNT1_INT_EN;
- break;
- default:
- WARN_ONCE(1, "invalid counter number (%d)\n", idx);
- return;
- }
-
- spin_lock_irqsave(&pmu_lock, flags);
- val = xscale1pmu_read_pmnc();
- val &= ~mask;
- val |= evt;
- xscale1pmu_write_pmnc(val);
- spin_unlock_irqrestore(&pmu_lock, flags);
-}
-
-static void
-xscale1pmu_disable_event(struct hw_perf_event *hwc, int idx)
-{
- unsigned long val, mask, evt, flags;
-
- switch (idx) {
- case XSCALE_CYCLE_COUNTER:
- mask = XSCALE1_CCOUNT_INT_EN;
- evt = 0;
- break;
- case XSCALE_COUNTER0:
- mask = XSCALE1_COUNT0_INT_EN | XSCALE1_COUNT0_EVT_MASK;
- evt = XSCALE_PERFCTR_UNUSED << XSCALE1_COUNT0_EVT_SHFT;
- break;
- case XSCALE_COUNTER1:
- mask = XSCALE1_COUNT1_INT_EN | XSCALE1_COUNT1_EVT_MASK;
- evt = XSCALE_PERFCTR_UNUSED << XSCALE1_COUNT1_EVT_SHFT;
- break;
- default:
- WARN_ONCE(1, "invalid counter number (%d)\n", idx);
- return;
- }
-
- spin_lock_irqsave(&pmu_lock, flags);
- val = xscale1pmu_read_pmnc();
- val &= ~mask;
- val |= evt;
- xscale1pmu_write_pmnc(val);
- spin_unlock_irqrestore(&pmu_lock, flags);
-}
-
-static int
-xscale1pmu_get_event_idx(struct cpu_hw_events *cpuc,
- struct hw_perf_event *event)
-{
- if (XSCALE_PERFCTR_CCNT == event->config_base) {
- if (test_and_set_bit(XSCALE_CYCLE_COUNTER, cpuc->used_mask))
- return -EAGAIN;
-
- return XSCALE_CYCLE_COUNTER;
- } else {
- if (!test_and_set_bit(XSCALE_COUNTER1, cpuc->used_mask)) {
- return XSCALE_COUNTER1;
- }
-
- if (!test_and_set_bit(XSCALE_COUNTER0, cpuc->used_mask)) {
- return XSCALE_COUNTER0;
- }
-
- return -EAGAIN;
- }
-}
-
-static void
-xscale1pmu_start(void)
-{
- unsigned long flags, val;
-
- spin_lock_irqsave(&pmu_lock, flags);
- val = xscale1pmu_read_pmnc();
- val |= XSCALE_PMU_ENABLE;
- xscale1pmu_write_pmnc(val);
- spin_unlock_irqrestore(&pmu_lock, flags);
-}
-
-static void
-xscale1pmu_stop(void)
-{
- unsigned long flags, val;
-
- spin_lock_irqsave(&pmu_lock, flags);
- val = xscale1pmu_read_pmnc();
- val &= ~XSCALE_PMU_ENABLE;
- xscale1pmu_write_pmnc(val);
- spin_unlock_irqrestore(&pmu_lock, flags);
-}
-
-static inline u32
-xscale1pmu_read_counter(int counter)
-{
- u32 val = 0;
-
- switch (counter) {
- case XSCALE_CYCLE_COUNTER:
- asm volatile("mrc p14, 0, %0, c1, c0, 0" : "=r" (val));
- break;
- case XSCALE_COUNTER0:
- asm volatile("mrc p14, 0, %0, c2, c0, 0" : "=r" (val));
- break;
- case XSCALE_COUNTER1:
- asm volatile("mrc p14, 0, %0, c3, c0, 0" : "=r" (val));
- break;
- }
-
- return val;
-}
-
-static inline void
-xscale1pmu_write_counter(int counter, u32 val)
-{
- switch (counter) {
- case XSCALE_CYCLE_COUNTER:
- asm volatile("mcr p14, 0, %0, c1, c0, 0" : : "r" (val));
- break;
- case XSCALE_COUNTER0:
- asm volatile("mcr p14, 0, %0, c2, c0, 0" : : "r" (val));
- break;
- case XSCALE_COUNTER1:
- asm volatile("mcr p14, 0, %0, c3, c0, 0" : : "r" (val));
- break;
- }
-}
-
-static const struct arm_pmu xscale1pmu = {
- .id = ARM_PERF_PMU_ID_XSCALE1,
- .name = "xscale1",
- .handle_irq = xscale1pmu_handle_irq,
- .enable = xscale1pmu_enable_event,
- .disable = xscale1pmu_disable_event,
- .read_counter = xscale1pmu_read_counter,
- .write_counter = xscale1pmu_write_counter,
- .get_event_idx = xscale1pmu_get_event_idx,
- .start = xscale1pmu_start,
- .stop = xscale1pmu_stop,
- .cache_map = &xscale_perf_cache_map,
- .event_map = &xscale_perf_map,
- .raw_event_mask = 0xFF,
- .num_events = 3,
- .max_period = (1LLU << 32) - 1,
-};
-
-const struct arm_pmu *__init xscale1pmu_init(void)
-{
- return &xscale1pmu;
-}
-
-#define XSCALE2_OVERFLOWED_MASK 0x01f
-#define XSCALE2_CCOUNT_OVERFLOW 0x001
-#define XSCALE2_COUNT0_OVERFLOW 0x002
-#define XSCALE2_COUNT1_OVERFLOW 0x004
-#define XSCALE2_COUNT2_OVERFLOW 0x008
-#define XSCALE2_COUNT3_OVERFLOW 0x010
-#define XSCALE2_CCOUNT_INT_EN 0x001
-#define XSCALE2_COUNT0_INT_EN 0x002
-#define XSCALE2_COUNT1_INT_EN 0x004
-#define XSCALE2_COUNT2_INT_EN 0x008
-#define XSCALE2_COUNT3_INT_EN 0x010
-#define XSCALE2_COUNT0_EVT_SHFT 0
-#define XSCALE2_COUNT0_EVT_MASK (0xff << XSCALE2_COUNT0_EVT_SHFT)
-#define XSCALE2_COUNT1_EVT_SHFT 8
-#define XSCALE2_COUNT1_EVT_MASK (0xff << XSCALE2_COUNT1_EVT_SHFT)
-#define XSCALE2_COUNT2_EVT_SHFT 16
-#define XSCALE2_COUNT2_EVT_MASK (0xff << XSCALE2_COUNT2_EVT_SHFT)
-#define XSCALE2_COUNT3_EVT_SHFT 24
-#define XSCALE2_COUNT3_EVT_MASK (0xff << XSCALE2_COUNT3_EVT_SHFT)
-
-static inline u32
-xscale2pmu_read_pmnc(void)
-{
- u32 val;
- asm volatile("mrc p14, 0, %0, c0, c1, 0" : "=r" (val));
- /* bits 1-2 and 4-23 are read-unpredictable */
- return val & 0xff000009;
-}
-
-static inline void
-xscale2pmu_write_pmnc(u32 val)
-{
- /* bits 4-23 are write-as-0, 24-31 are write ignored */
- val &= 0xf;
- asm volatile("mcr p14, 0, %0, c0, c1, 0" : : "r" (val));
-}
-
-static inline u32
-xscale2pmu_read_overflow_flags(void)
-{
- u32 val;
- asm volatile("mrc p14, 0, %0, c5, c1, 0" : "=r" (val));
- return val;
-}
-
-static inline void
-xscale2pmu_write_overflow_flags(u32 val)
-{
- asm volatile("mcr p14, 0, %0, c5, c1, 0" : : "r" (val));
-}
-
-static inline u32
-xscale2pmu_read_event_select(void)
-{
- u32 val;
- asm volatile("mrc p14, 0, %0, c8, c1, 0" : "=r" (val));
- return val;
-}
-
-static inline void
-xscale2pmu_write_event_select(u32 val)
-{
- asm volatile("mcr p14, 0, %0, c8, c1, 0" : : "r"(val));
-}
-
-static inline u32
-xscale2pmu_read_int_enable(void)
-{
- u32 val;
- asm volatile("mrc p14, 0, %0, c4, c1, 0" : "=r" (val));
- return val;
-}
-
-static void
-xscale2pmu_write_int_enable(u32 val)
-{
- asm volatile("mcr p14, 0, %0, c4, c1, 0" : : "r" (val));
-}
-
-static inline int
-xscale2_pmnc_counter_has_overflowed(unsigned long of_flags,
- enum xscale_counters counter)
-{
- int ret = 0;
-
- switch (counter) {
- case XSCALE_CYCLE_COUNTER:
- ret = of_flags & XSCALE2_CCOUNT_OVERFLOW;
- break;
- case XSCALE_COUNTER0:
- ret = of_flags & XSCALE2_COUNT0_OVERFLOW;
- break;
- case XSCALE_COUNTER1:
- ret = of_flags & XSCALE2_COUNT1_OVERFLOW;
- break;
- case XSCALE_COUNTER2:
- ret = of_flags & XSCALE2_COUNT2_OVERFLOW;
- break;
- case XSCALE_COUNTER3:
- ret = of_flags & XSCALE2_COUNT3_OVERFLOW;
- break;
- default:
- WARN_ONCE(1, "invalid counter number (%d)\n", counter);
- }
-
- return ret;
-}
-
-static irqreturn_t
-xscale2pmu_handle_irq(int irq_num, void *dev)
-{
- unsigned long pmnc, of_flags;
- struct perf_sample_data data;
- struct cpu_hw_events *cpuc;
- struct pt_regs *regs;
- int idx;
-
- /* Disable the PMU. */
- pmnc = xscale2pmu_read_pmnc();
- xscale2pmu_write_pmnc(pmnc & ~XSCALE_PMU_ENABLE);
-
- /* Check the overflow flag register. */
- of_flags = xscale2pmu_read_overflow_flags();
- if (!(of_flags & XSCALE2_OVERFLOWED_MASK))
- return IRQ_NONE;
-
- /* Clear the overflow bits. */
- xscale2pmu_write_overflow_flags(of_flags);
-
- regs = get_irq_regs();
-
- perf_sample_data_init(&data, 0);
-
- cpuc = &__get_cpu_var(cpu_hw_events);
- for (idx = 0; idx <= armpmu->num_events; ++idx) {
- struct perf_event *event = cpuc->events[idx];
- struct hw_perf_event *hwc;
-
- if (!test_bit(idx, cpuc->active_mask))
- continue;
-
- if (!xscale2_pmnc_counter_has_overflowed(pmnc, idx))
- continue;
-
- hwc = &event->hw;
- armpmu_event_update(event, hwc, idx);
- data.period = event->hw.last_period;
- if (!armpmu_event_set_period(event, hwc, idx))
- continue;
-
- if (perf_event_overflow(event, 0, &data, regs))
- armpmu->disable(hwc, idx);
- }
-
- irq_work_run();
-
- /*
- * Re-enable the PMU.
- */
- pmnc = xscale2pmu_read_pmnc() | XSCALE_PMU_ENABLE;
- xscale2pmu_write_pmnc(pmnc);
-
- return IRQ_HANDLED;
-}
-
-static void
-xscale2pmu_enable_event(struct hw_perf_event *hwc, int idx)
-{
- unsigned long flags, ien, evtsel;
-
- ien = xscale2pmu_read_int_enable();
- evtsel = xscale2pmu_read_event_select();
-
- switch (idx) {
- case XSCALE_CYCLE_COUNTER:
- ien |= XSCALE2_CCOUNT_INT_EN;
- break;
- case XSCALE_COUNTER0:
- ien |= XSCALE2_COUNT0_INT_EN;
- evtsel &= ~XSCALE2_COUNT0_EVT_MASK;
- evtsel |= hwc->config_base << XSCALE2_COUNT0_EVT_SHFT;
- break;
- case XSCALE_COUNTER1:
- ien |= XSCALE2_COUNT1_INT_EN;
- evtsel &= ~XSCALE2_COUNT1_EVT_MASK;
- evtsel |= hwc->config_base << XSCALE2_COUNT1_EVT_SHFT;
- break;
- case XSCALE_COUNTER2:
- ien |= XSCALE2_COUNT2_INT_EN;
- evtsel &= ~XSCALE2_COUNT2_EVT_MASK;
- evtsel |= hwc->config_base << XSCALE2_COUNT2_EVT_SHFT;
- break;
- case XSCALE_COUNTER3:
- ien |= XSCALE2_COUNT3_INT_EN;
- evtsel &= ~XSCALE2_COUNT3_EVT_MASK;
- evtsel |= hwc->config_base << XSCALE2_COUNT3_EVT_SHFT;
- break;
- default:
- WARN_ONCE(1, "invalid counter number (%d)\n", idx);
- return;
- }
-
- spin_lock_irqsave(&pmu_lock, flags);
- xscale2pmu_write_event_select(evtsel);
- xscale2pmu_write_int_enable(ien);
- spin_unlock_irqrestore(&pmu_lock, flags);
-}
-
-static void
-xscale2pmu_disable_event(struct hw_perf_event *hwc, int idx)
-{
- unsigned long flags, ien, evtsel;
-
- ien = xscale2pmu_read_int_enable();
- evtsel = xscale2pmu_read_event_select();
-
- switch (idx) {
- case XSCALE_CYCLE_COUNTER:
- ien &= ~XSCALE2_CCOUNT_INT_EN;
- break;
- case XSCALE_COUNTER0:
- ien &= ~XSCALE2_COUNT0_INT_EN;
- evtsel &= ~XSCALE2_COUNT0_EVT_MASK;
- evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT0_EVT_SHFT;
- break;
- case XSCALE_COUNTER1:
- ien &= ~XSCALE2_COUNT1_INT_EN;
- evtsel &= ~XSCALE2_COUNT1_EVT_MASK;
- evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT1_EVT_SHFT;
- break;
- case XSCALE_COUNTER2:
- ien &= ~XSCALE2_COUNT2_INT_EN;
- evtsel &= ~XSCALE2_COUNT2_EVT_MASK;
- evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT2_EVT_SHFT;
- break;
- case XSCALE_COUNTER3:
- ien &= ~XSCALE2_COUNT3_INT_EN;
- evtsel &= ~XSCALE2_COUNT3_EVT_MASK;
- evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT3_EVT_SHFT;
- break;
- default:
- WARN_ONCE(1, "invalid counter number (%d)\n", idx);
- return;
- }
-
- spin_lock_irqsave(&pmu_lock, flags);
- xscale2pmu_write_event_select(evtsel);
- xscale2pmu_write_int_enable(ien);
- spin_unlock_irqrestore(&pmu_lock, flags);
-}
-
-static int
-xscale2pmu_get_event_idx(struct cpu_hw_events *cpuc,
- struct hw_perf_event *event)
-{
- int idx = xscale1pmu_get_event_idx(cpuc, event);
- if (idx >= 0)
- goto out;
-
- if (!test_and_set_bit(XSCALE_COUNTER3, cpuc->used_mask))
- idx = XSCALE_COUNTER3;
- else if (!test_and_set_bit(XSCALE_COUNTER2, cpuc->used_mask))
- idx = XSCALE_COUNTER2;
-out:
- return idx;
-}
-
-static void
-xscale2pmu_start(void)
-{
- unsigned long flags, val;
-
- spin_lock_irqsave(&pmu_lock, flags);
- val = xscale2pmu_read_pmnc() & ~XSCALE_PMU_CNT64;
- val |= XSCALE_PMU_ENABLE;
- xscale2pmu_write_pmnc(val);
- spin_unlock_irqrestore(&pmu_lock, flags);
-}
-
-static void
-xscale2pmu_stop(void)
-{
- unsigned long flags, val;
-
- spin_lock_irqsave(&pmu_lock, flags);
- val = xscale2pmu_read_pmnc();
- val &= ~XSCALE_PMU_ENABLE;
- xscale2pmu_write_pmnc(val);
- spin_unlock_irqrestore(&pmu_lock, flags);
-}
-
-static inline u32
-xscale2pmu_read_counter(int counter)
-{
- u32 val = 0;
-
- switch (counter) {
- case XSCALE_CYCLE_COUNTER:
- asm volatile("mrc p14, 0, %0, c1, c1, 0" : "=r" (val));
- break;
- case XSCALE_COUNTER0:
- asm volatile("mrc p14, 0, %0, c0, c2, 0" : "=r" (val));
- break;
- case XSCALE_COUNTER1:
- asm volatile("mrc p14, 0, %0, c1, c2, 0" : "=r" (val));
- break;
- case XSCALE_COUNTER2:
- asm volatile("mrc p14, 0, %0, c2, c2, 0" : "=r" (val));
- break;
- case XSCALE_COUNTER3:
- asm volatile("mrc p14, 0, %0, c3, c2, 0" : "=r" (val));
- break;
- }
-
- return val;
-}
-
-static inline void
-xscale2pmu_write_counter(int counter, u32 val)
-{
- switch (counter) {
- case XSCALE_CYCLE_COUNTER:
- asm volatile("mcr p14, 0, %0, c1, c1, 0" : : "r" (val));
- break;
- case XSCALE_COUNTER0:
- asm volatile("mcr p14, 0, %0, c0, c2, 0" : : "r" (val));
- break;
- case XSCALE_COUNTER1:
- asm volatile("mcr p14, 0, %0, c1, c2, 0" : : "r" (val));
- break;
- case XSCALE_COUNTER2:
- asm volatile("mcr p14, 0, %0, c2, c2, 0" : : "r" (val));
- break;
- case XSCALE_COUNTER3:
- asm volatile("mcr p14, 0, %0, c3, c2, 0" : : "r" (val));
- break;
- }
-}
-
-static const struct arm_pmu xscale2pmu = {
- .id = ARM_PERF_PMU_ID_XSCALE2,
- .name = "xscale2",
- .handle_irq = xscale2pmu_handle_irq,
- .enable = xscale2pmu_enable_event,
- .disable = xscale2pmu_disable_event,
- .read_counter = xscale2pmu_read_counter,
- .write_counter = xscale2pmu_write_counter,
- .get_event_idx = xscale2pmu_get_event_idx,
- .start = xscale2pmu_start,
- .stop = xscale2pmu_stop,
- .cache_map = &xscale_perf_cache_map,
- .event_map = &xscale_perf_map,
- .raw_event_mask = 0xFF,
- .num_events = 5,
- .max_period = (1LLU << 32) - 1,
-};
-
-const struct arm_pmu *__init xscale2pmu_init(void)
-{
- return &xscale2pmu;
-}
+/* Include the PMU-specific implementations. */
+#include "perf_event_xscale.c"
+#include "perf_event_v6.c"
+#include "perf_event_v7.c"
static int __init
init_hw_perf_events(void)
--- /dev/null
+/*
+ * ARMv6 Performance counter handling code.
+ *
+ * Copyright (C) 2009 picoChip Designs, Ltd., Jamie Iles
+ *
+ * ARMv6 has 2 configurable performance counters and a single cycle counter.
+ * They all share a single reset bit but can be written to zero so we can use
+ * that for a reset.
+ *
+ * The counters can't be individually enabled or disabled so when we remove
+ * one event and replace it with another we could get spurious counts from the
+ * wrong event. However, we can take advantage of the fact that the
+ * performance counters can export events to the event bus, and the event bus
+ * itself can be monitored. This requires that we *don't* export the events to
+ * the event bus. The procedure for disabling a configurable counter is:
+ * - change the counter to count the ETMEXTOUT[0] signal (0x20). This
+ * effectively stops the counter from counting.
+ * - disable the counter's interrupt generation (each counter has it's
+ * own interrupt enable bit).
+ * Once stopped, the counter value can be written as 0 to reset.
+ *
+ * To enable a counter:
+ * - enable the counter's interrupt generation.
+ * - set the new event type.
+ *
+ * Note: the dedicated cycle counter only counts cycles and can't be
+ * enabled/disabled independently of the others. When we want to disable the
+ * cycle counter, we have to just disable the interrupt reporting and start
+ * ignoring that counter. When re-enabling, we have to reset the value and
+ * enable the interrupt.
+ */
+
+#ifdef CONFIG_CPU_V6
+enum armv6_perf_types {
+ ARMV6_PERFCTR_ICACHE_MISS = 0x0,
+ ARMV6_PERFCTR_IBUF_STALL = 0x1,
+ ARMV6_PERFCTR_DDEP_STALL = 0x2,
+ ARMV6_PERFCTR_ITLB_MISS = 0x3,
+ ARMV6_PERFCTR_DTLB_MISS = 0x4,
+ ARMV6_PERFCTR_BR_EXEC = 0x5,
+ ARMV6_PERFCTR_BR_MISPREDICT = 0x6,
+ ARMV6_PERFCTR_INSTR_EXEC = 0x7,
+ ARMV6_PERFCTR_DCACHE_HIT = 0x9,
+ ARMV6_PERFCTR_DCACHE_ACCESS = 0xA,
+ ARMV6_PERFCTR_DCACHE_MISS = 0xB,
+ ARMV6_PERFCTR_DCACHE_WBACK = 0xC,
+ ARMV6_PERFCTR_SW_PC_CHANGE = 0xD,
+ ARMV6_PERFCTR_MAIN_TLB_MISS = 0xF,
+ ARMV6_PERFCTR_EXPL_D_ACCESS = 0x10,
+ ARMV6_PERFCTR_LSU_FULL_STALL = 0x11,
+ ARMV6_PERFCTR_WBUF_DRAINED = 0x12,
+ ARMV6_PERFCTR_CPU_CYCLES = 0xFF,
+ ARMV6_PERFCTR_NOP = 0x20,
+};
+
+enum armv6_counters {
+ ARMV6_CYCLE_COUNTER = 1,
+ ARMV6_COUNTER0,
+ ARMV6_COUNTER1,
+};
+
+/*
+ * The hardware events that we support. We do support cache operations but
+ * we have harvard caches and no way to combine instruction and data
+ * accesses/misses in hardware.
+ */
+static const unsigned armv6_perf_map[PERF_COUNT_HW_MAX] = {
+ [PERF_COUNT_HW_CPU_CYCLES] = ARMV6_PERFCTR_CPU_CYCLES,
+ [PERF_COUNT_HW_INSTRUCTIONS] = ARMV6_PERFCTR_INSTR_EXEC,
+ [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED,
+ [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED,
+ [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV6_PERFCTR_BR_EXEC,
+ [PERF_COUNT_HW_BRANCH_MISSES] = ARMV6_PERFCTR_BR_MISPREDICT,
+ [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED,
+};
+
+static const unsigned armv6_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
+ [PERF_COUNT_HW_CACHE_OP_MAX]
+ [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
+ [C(L1D)] = {
+ /*
+ * The performance counters don't differentiate between read
+ * and write accesses/misses so this isn't strictly correct,
+ * but it's the best we can do. Writes and reads get
+ * combined.
+ */
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = ARMV6_PERFCTR_DCACHE_ACCESS,
+ [C(RESULT_MISS)] = ARMV6_PERFCTR_DCACHE_MISS,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = ARMV6_PERFCTR_DCACHE_ACCESS,
+ [C(RESULT_MISS)] = ARMV6_PERFCTR_DCACHE_MISS,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(L1I)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = ARMV6_PERFCTR_ICACHE_MISS,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = ARMV6_PERFCTR_ICACHE_MISS,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(LL)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(DTLB)] = {
+ /*
+ * The ARM performance counters can count micro DTLB misses,
+ * micro ITLB misses and main TLB misses. There isn't an event
+ * for TLB misses, so use the micro misses here and if users
+ * want the main TLB misses they can use a raw counter.
+ */
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = ARMV6_PERFCTR_DTLB_MISS,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = ARMV6_PERFCTR_DTLB_MISS,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(ITLB)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = ARMV6_PERFCTR_ITLB_MISS,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = ARMV6_PERFCTR_ITLB_MISS,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(BPU)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+};
+
+enum armv6mpcore_perf_types {
+ ARMV6MPCORE_PERFCTR_ICACHE_MISS = 0x0,
+ ARMV6MPCORE_PERFCTR_IBUF_STALL = 0x1,
+ ARMV6MPCORE_PERFCTR_DDEP_STALL = 0x2,
+ ARMV6MPCORE_PERFCTR_ITLB_MISS = 0x3,
+ ARMV6MPCORE_PERFCTR_DTLB_MISS = 0x4,
+ ARMV6MPCORE_PERFCTR_BR_EXEC = 0x5,
+ ARMV6MPCORE_PERFCTR_BR_NOTPREDICT = 0x6,
+ ARMV6MPCORE_PERFCTR_BR_MISPREDICT = 0x7,
+ ARMV6MPCORE_PERFCTR_INSTR_EXEC = 0x8,
+ ARMV6MPCORE_PERFCTR_DCACHE_RDACCESS = 0xA,
+ ARMV6MPCORE_PERFCTR_DCACHE_RDMISS = 0xB,
+ ARMV6MPCORE_PERFCTR_DCACHE_WRACCESS = 0xC,
+ ARMV6MPCORE_PERFCTR_DCACHE_WRMISS = 0xD,
+ ARMV6MPCORE_PERFCTR_DCACHE_EVICTION = 0xE,
+ ARMV6MPCORE_PERFCTR_SW_PC_CHANGE = 0xF,
+ ARMV6MPCORE_PERFCTR_MAIN_TLB_MISS = 0x10,
+ ARMV6MPCORE_PERFCTR_EXPL_MEM_ACCESS = 0x11,
+ ARMV6MPCORE_PERFCTR_LSU_FULL_STALL = 0x12,
+ ARMV6MPCORE_PERFCTR_WBUF_DRAINED = 0x13,
+ ARMV6MPCORE_PERFCTR_CPU_CYCLES = 0xFF,
+};
+
+/*
+ * The hardware events that we support. We do support cache operations but
+ * we have harvard caches and no way to combine instruction and data
+ * accesses/misses in hardware.
+ */
+static const unsigned armv6mpcore_perf_map[PERF_COUNT_HW_MAX] = {
+ [PERF_COUNT_HW_CPU_CYCLES] = ARMV6MPCORE_PERFCTR_CPU_CYCLES,
+ [PERF_COUNT_HW_INSTRUCTIONS] = ARMV6MPCORE_PERFCTR_INSTR_EXEC,
+ [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED,
+ [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED,
+ [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV6MPCORE_PERFCTR_BR_EXEC,
+ [PERF_COUNT_HW_BRANCH_MISSES] = ARMV6MPCORE_PERFCTR_BR_MISPREDICT,
+ [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED,
+};
+
+static const unsigned armv6mpcore_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
+ [PERF_COUNT_HW_CACHE_OP_MAX]
+ [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
+ [C(L1D)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] =
+ ARMV6MPCORE_PERFCTR_DCACHE_RDACCESS,
+ [C(RESULT_MISS)] =
+ ARMV6MPCORE_PERFCTR_DCACHE_RDMISS,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] =
+ ARMV6MPCORE_PERFCTR_DCACHE_WRACCESS,
+ [C(RESULT_MISS)] =
+ ARMV6MPCORE_PERFCTR_DCACHE_WRMISS,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(L1I)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ICACHE_MISS,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ICACHE_MISS,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(LL)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(DTLB)] = {
+ /*
+ * The ARM performance counters can count micro DTLB misses,
+ * micro ITLB misses and main TLB misses. There isn't an event
+ * for TLB misses, so use the micro misses here and if users
+ * want the main TLB misses they can use a raw counter.
+ */
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_DTLB_MISS,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_DTLB_MISS,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(ITLB)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ITLB_MISS,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ITLB_MISS,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(BPU)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+};
+
+static inline unsigned long
+armv6_pmcr_read(void)
+{
+ u32 val;
+ asm volatile("mrc p15, 0, %0, c15, c12, 0" : "=r"(val));
+ return val;
+}
+
+static inline void
+armv6_pmcr_write(unsigned long val)
+{
+ asm volatile("mcr p15, 0, %0, c15, c12, 0" : : "r"(val));
+}
+
+#define ARMV6_PMCR_ENABLE (1 << 0)
+#define ARMV6_PMCR_CTR01_RESET (1 << 1)
+#define ARMV6_PMCR_CCOUNT_RESET (1 << 2)
+#define ARMV6_PMCR_CCOUNT_DIV (1 << 3)
+#define ARMV6_PMCR_COUNT0_IEN (1 << 4)
+#define ARMV6_PMCR_COUNT1_IEN (1 << 5)
+#define ARMV6_PMCR_CCOUNT_IEN (1 << 6)
+#define ARMV6_PMCR_COUNT0_OVERFLOW (1 << 8)
+#define ARMV6_PMCR_COUNT1_OVERFLOW (1 << 9)
+#define ARMV6_PMCR_CCOUNT_OVERFLOW (1 << 10)
+#define ARMV6_PMCR_EVT_COUNT0_SHIFT 20
+#define ARMV6_PMCR_EVT_COUNT0_MASK (0xFF << ARMV6_PMCR_EVT_COUNT0_SHIFT)
+#define ARMV6_PMCR_EVT_COUNT1_SHIFT 12
+#define ARMV6_PMCR_EVT_COUNT1_MASK (0xFF << ARMV6_PMCR_EVT_COUNT1_SHIFT)
+
+#define ARMV6_PMCR_OVERFLOWED_MASK \
+ (ARMV6_PMCR_COUNT0_OVERFLOW | ARMV6_PMCR_COUNT1_OVERFLOW | \
+ ARMV6_PMCR_CCOUNT_OVERFLOW)
+
+static inline int
+armv6_pmcr_has_overflowed(unsigned long pmcr)
+{
+ return pmcr & ARMV6_PMCR_OVERFLOWED_MASK;
+}
+
+static inline int
+armv6_pmcr_counter_has_overflowed(unsigned long pmcr,
+ enum armv6_counters counter)
+{
+ int ret = 0;
+
+ if (ARMV6_CYCLE_COUNTER == counter)
+ ret = pmcr & ARMV6_PMCR_CCOUNT_OVERFLOW;
+ else if (ARMV6_COUNTER0 == counter)
+ ret = pmcr & ARMV6_PMCR_COUNT0_OVERFLOW;
+ else if (ARMV6_COUNTER1 == counter)
+ ret = pmcr & ARMV6_PMCR_COUNT1_OVERFLOW;
+ else
+ WARN_ONCE(1, "invalid counter number (%d)\n", counter);
+
+ return ret;
+}
+
+static inline u32
+armv6pmu_read_counter(int counter)
+{
+ unsigned long value = 0;
+
+ if (ARMV6_CYCLE_COUNTER == counter)
+ asm volatile("mrc p15, 0, %0, c15, c12, 1" : "=r"(value));
+ else if (ARMV6_COUNTER0 == counter)
+ asm volatile("mrc p15, 0, %0, c15, c12, 2" : "=r"(value));
+ else if (ARMV6_COUNTER1 == counter)
+ asm volatile("mrc p15, 0, %0, c15, c12, 3" : "=r"(value));
+ else
+ WARN_ONCE(1, "invalid counter number (%d)\n", counter);
+
+ return value;
+}
+
+static inline void
+armv6pmu_write_counter(int counter,
+ u32 value)
+{
+ if (ARMV6_CYCLE_COUNTER == counter)
+ asm volatile("mcr p15, 0, %0, c15, c12, 1" : : "r"(value));
+ else if (ARMV6_COUNTER0 == counter)
+ asm volatile("mcr p15, 0, %0, c15, c12, 2" : : "r"(value));
+ else if (ARMV6_COUNTER1 == counter)
+ asm volatile("mcr p15, 0, %0, c15, c12, 3" : : "r"(value));
+ else
+ WARN_ONCE(1, "invalid counter number (%d)\n", counter);
+}
+
+void
+armv6pmu_enable_event(struct hw_perf_event *hwc,
+ int idx)
+{
+ unsigned long val, mask, evt, flags;
+
+ if (ARMV6_CYCLE_COUNTER == idx) {
+ mask = 0;
+ evt = ARMV6_PMCR_CCOUNT_IEN;
+ } else if (ARMV6_COUNTER0 == idx) {
+ mask = ARMV6_PMCR_EVT_COUNT0_MASK;
+ evt = (hwc->config_base << ARMV6_PMCR_EVT_COUNT0_SHIFT) |
+ ARMV6_PMCR_COUNT0_IEN;
+ } else if (ARMV6_COUNTER1 == idx) {
+ mask = ARMV6_PMCR_EVT_COUNT1_MASK;
+ evt = (hwc->config_base << ARMV6_PMCR_EVT_COUNT1_SHIFT) |
+ ARMV6_PMCR_COUNT1_IEN;
+ } else {
+ WARN_ONCE(1, "invalid counter number (%d)\n", idx);
+ return;
+ }
+
+ /*
+ * Mask out the current event and set the counter to count the event
+ * that we're interested in.
+ */
+ spin_lock_irqsave(&pmu_lock, flags);
+ val = armv6_pmcr_read();
+ val &= ~mask;
+ val |= evt;
+ armv6_pmcr_write(val);
+ spin_unlock_irqrestore(&pmu_lock, flags);
+}
+
+static irqreturn_t
+armv6pmu_handle_irq(int irq_num,
+ void *dev)
+{
+ unsigned long pmcr = armv6_pmcr_read();
+ struct perf_sample_data data;
+ struct cpu_hw_events *cpuc;
+ struct pt_regs *regs;
+ int idx;
+
+ if (!armv6_pmcr_has_overflowed(pmcr))
+ return IRQ_NONE;
+
+ regs = get_irq_regs();
+
+ /*
+ * The interrupts are cleared by writing the overflow flags back to
+ * the control register. All of the other bits don't have any effect
+ * if they are rewritten, so write the whole value back.
+ */
+ armv6_pmcr_write(pmcr);
+
+ perf_sample_data_init(&data, 0);
+
+ cpuc = &__get_cpu_var(cpu_hw_events);
+ for (idx = 0; idx <= armpmu->num_events; ++idx) {
+ struct perf_event *event = cpuc->events[idx];
+ struct hw_perf_event *hwc;
+
+ if (!test_bit(idx, cpuc->active_mask))
+ continue;
+
+ /*
+ * We have a single interrupt for all counters. Check that
+ * each counter has overflowed before we process it.
+ */
+ if (!armv6_pmcr_counter_has_overflowed(pmcr, idx))
+ continue;
+
+ hwc = &event->hw;
+ armpmu_event_update(event, hwc, idx);
+ data.period = event->hw.last_period;
+ if (!armpmu_event_set_period(event, hwc, idx))
+ continue;
+
+ if (perf_event_overflow(event, 0, &data, regs))
+ armpmu->disable(hwc, idx);
+ }
+
+ /*
+ * Handle the pending perf events.
+ *
+ * Note: this call *must* be run with interrupts disabled. For
+ * platforms that can have the PMU interrupts raised as an NMI, this
+ * will not work.
+ */
+ irq_work_run();
+
+ return IRQ_HANDLED;
+}
+
+static void
+armv6pmu_start(void)
+{
+ unsigned long flags, val;
+
+ spin_lock_irqsave(&pmu_lock, flags);
+ val = armv6_pmcr_read();
+ val |= ARMV6_PMCR_ENABLE;
+ armv6_pmcr_write(val);
+ spin_unlock_irqrestore(&pmu_lock, flags);
+}
+
+static void
+armv6pmu_stop(void)
+{
+ unsigned long flags, val;
+
+ spin_lock_irqsave(&pmu_lock, flags);
+ val = armv6_pmcr_read();
+ val &= ~ARMV6_PMCR_ENABLE;
+ armv6_pmcr_write(val);
+ spin_unlock_irqrestore(&pmu_lock, flags);
+}
+
+static int
+armv6pmu_get_event_idx(struct cpu_hw_events *cpuc,
+ struct hw_perf_event *event)
+{
+ /* Always place a cycle counter into the cycle counter. */
+ if (ARMV6_PERFCTR_CPU_CYCLES == event->config_base) {
+ if (test_and_set_bit(ARMV6_CYCLE_COUNTER, cpuc->used_mask))
+ return -EAGAIN;
+
+ return ARMV6_CYCLE_COUNTER;
+ } else {
+ /*
+ * For anything other than a cycle counter, try and use
+ * counter0 and counter1.
+ */
+ if (!test_and_set_bit(ARMV6_COUNTER1, cpuc->used_mask))
+ return ARMV6_COUNTER1;
+
+ if (!test_and_set_bit(ARMV6_COUNTER0, cpuc->used_mask))
+ return ARMV6_COUNTER0;
+
+ /* The counters are all in use. */
+ return -EAGAIN;
+ }
+}
+
+static void
+armv6pmu_disable_event(struct hw_perf_event *hwc,
+ int idx)
+{
+ unsigned long val, mask, evt, flags;
+
+ if (ARMV6_CYCLE_COUNTER == idx) {
+ mask = ARMV6_PMCR_CCOUNT_IEN;
+ evt = 0;
+ } else if (ARMV6_COUNTER0 == idx) {
+ mask = ARMV6_PMCR_COUNT0_IEN | ARMV6_PMCR_EVT_COUNT0_MASK;
+ evt = ARMV6_PERFCTR_NOP << ARMV6_PMCR_EVT_COUNT0_SHIFT;
+ } else if (ARMV6_COUNTER1 == idx) {
+ mask = ARMV6_PMCR_COUNT1_IEN | ARMV6_PMCR_EVT_COUNT1_MASK;
+ evt = ARMV6_PERFCTR_NOP << ARMV6_PMCR_EVT_COUNT1_SHIFT;
+ } else {
+ WARN_ONCE(1, "invalid counter number (%d)\n", idx);
+ return;
+ }
+
+ /*
+ * Mask out the current event and set the counter to count the number
+ * of ETM bus signal assertion cycles. The external reporting should
+ * be disabled and so this should never increment.
+ */
+ spin_lock_irqsave(&pmu_lock, flags);
+ val = armv6_pmcr_read();
+ val &= ~mask;
+ val |= evt;
+ armv6_pmcr_write(val);
+ spin_unlock_irqrestore(&pmu_lock, flags);
+}
+
+static void
+armv6mpcore_pmu_disable_event(struct hw_perf_event *hwc,
+ int idx)
+{
+ unsigned long val, mask, flags, evt = 0;
+
+ if (ARMV6_CYCLE_COUNTER == idx) {
+ mask = ARMV6_PMCR_CCOUNT_IEN;
+ } else if (ARMV6_COUNTER0 == idx) {
+ mask = ARMV6_PMCR_COUNT0_IEN;
+ } else if (ARMV6_COUNTER1 == idx) {
+ mask = ARMV6_PMCR_COUNT1_IEN;
+ } else {
+ WARN_ONCE(1, "invalid counter number (%d)\n", idx);
+ return;
+ }
+
+ /*
+ * Unlike UP ARMv6, we don't have a way of stopping the counters. We
+ * simply disable the interrupt reporting.
+ */
+ spin_lock_irqsave(&pmu_lock, flags);
+ val = armv6_pmcr_read();
+ val &= ~mask;
+ val |= evt;
+ armv6_pmcr_write(val);
+ spin_unlock_irqrestore(&pmu_lock, flags);
+}
+
+static const struct arm_pmu armv6pmu = {
+ .id = ARM_PERF_PMU_ID_V6,
+ .name = "v6",
+ .handle_irq = armv6pmu_handle_irq,
+ .enable = armv6pmu_enable_event,
+ .disable = armv6pmu_disable_event,
+ .read_counter = armv6pmu_read_counter,
+ .write_counter = armv6pmu_write_counter,
+ .get_event_idx = armv6pmu_get_event_idx,
+ .start = armv6pmu_start,
+ .stop = armv6pmu_stop,
+ .cache_map = &armv6_perf_cache_map,
+ .event_map = &armv6_perf_map,
+ .raw_event_mask = 0xFF,
+ .num_events = 3,
+ .max_period = (1LLU << 32) - 1,
+};
+
+const struct arm_pmu *__init armv6pmu_init(void)
+{
+ return &armv6pmu;
+}
+
+/*
+ * ARMv6mpcore is almost identical to single core ARMv6 with the exception
+ * that some of the events have different enumerations and that there is no
+ * *hack* to stop the programmable counters. To stop the counters we simply
+ * disable the interrupt reporting and update the event. When unthrottling we
+ * reset the period and enable the interrupt reporting.
+ */
+static const struct arm_pmu armv6mpcore_pmu = {
+ .id = ARM_PERF_PMU_ID_V6MP,
+ .name = "v6mpcore",
+ .handle_irq = armv6pmu_handle_irq,
+ .enable = armv6pmu_enable_event,
+ .disable = armv6mpcore_pmu_disable_event,
+ .read_counter = armv6pmu_read_counter,
+ .write_counter = armv6pmu_write_counter,
+ .get_event_idx = armv6pmu_get_event_idx,
+ .start = armv6pmu_start,
+ .stop = armv6pmu_stop,
+ .cache_map = &armv6mpcore_perf_cache_map,
+ .event_map = &armv6mpcore_perf_map,
+ .raw_event_mask = 0xFF,
+ .num_events = 3,
+ .max_period = (1LLU << 32) - 1,
+};
+
+const struct arm_pmu *__init armv6mpcore_pmu_init(void)
+{
+ return &armv6mpcore_pmu;
+}
+#else
+const struct arm_pmu *__init armv6pmu_init(void)
+{
+ return NULL;
+}
+
+const struct arm_pmu *__init armv6mpcore_pmu_init(void)
+{
+ return NULL;
+}
+#endif /* CONFIG_CPU_V6 */
--- /dev/null
+/*
+ * ARMv7 Cortex-A8 and Cortex-A9 Performance Events handling code.
+ *
+ * ARMv7 support: Jean Pihet <jpihet@mvista.com>
+ * 2010 (c) MontaVista Software, LLC.
+ *
+ * Copied from ARMv6 code, with the low level code inspired
+ * by the ARMv7 Oprofile code.
+ *
+ * Cortex-A8 has up to 4 configurable performance counters and
+ * a single cycle counter.
+ * Cortex-A9 has up to 31 configurable performance counters and
+ * a single cycle counter.
+ *
+ * All counters can be enabled/disabled and IRQ masked separately. The cycle
+ * counter and all 4 performance counters together can be reset separately.
+ */
+
+#ifdef CONFIG_CPU_V7
+/* Common ARMv7 event types */
+enum armv7_perf_types {
+ ARMV7_PERFCTR_PMNC_SW_INCR = 0x00,
+ ARMV7_PERFCTR_IFETCH_MISS = 0x01,
+ ARMV7_PERFCTR_ITLB_MISS = 0x02,
+ ARMV7_PERFCTR_DCACHE_REFILL = 0x03,
+ ARMV7_PERFCTR_DCACHE_ACCESS = 0x04,
+ ARMV7_PERFCTR_DTLB_REFILL = 0x05,
+ ARMV7_PERFCTR_DREAD = 0x06,
+ ARMV7_PERFCTR_DWRITE = 0x07,
+
+ ARMV7_PERFCTR_EXC_TAKEN = 0x09,
+ ARMV7_PERFCTR_EXC_EXECUTED = 0x0A,
+ ARMV7_PERFCTR_CID_WRITE = 0x0B,
+ /* ARMV7_PERFCTR_PC_WRITE is equivalent to HW_BRANCH_INSTRUCTIONS.
+ * It counts:
+ * - all branch instructions,
+ * - instructions that explicitly write the PC,
+ * - exception generating instructions.
+ */
+ ARMV7_PERFCTR_PC_WRITE = 0x0C,
+ ARMV7_PERFCTR_PC_IMM_BRANCH = 0x0D,
+ ARMV7_PERFCTR_UNALIGNED_ACCESS = 0x0F,
+ ARMV7_PERFCTR_PC_BRANCH_MIS_PRED = 0x10,
+ ARMV7_PERFCTR_CLOCK_CYCLES = 0x11,
+
+ ARMV7_PERFCTR_PC_BRANCH_MIS_USED = 0x12,
+
+ ARMV7_PERFCTR_CPU_CYCLES = 0xFF
+};
+
+/* ARMv7 Cortex-A8 specific event types */
+enum armv7_a8_perf_types {
+ ARMV7_PERFCTR_INSTR_EXECUTED = 0x08,
+
+ ARMV7_PERFCTR_PC_PROC_RETURN = 0x0E,
+
+ ARMV7_PERFCTR_WRITE_BUFFER_FULL = 0x40,
+ ARMV7_PERFCTR_L2_STORE_MERGED = 0x41,
+ ARMV7_PERFCTR_L2_STORE_BUFF = 0x42,
+ ARMV7_PERFCTR_L2_ACCESS = 0x43,
+ ARMV7_PERFCTR_L2_CACH_MISS = 0x44,
+ ARMV7_PERFCTR_AXI_READ_CYCLES = 0x45,
+ ARMV7_PERFCTR_AXI_WRITE_CYCLES = 0x46,
+ ARMV7_PERFCTR_MEMORY_REPLAY = 0x47,
+ ARMV7_PERFCTR_UNALIGNED_ACCESS_REPLAY = 0x48,
+ ARMV7_PERFCTR_L1_DATA_MISS = 0x49,
+ ARMV7_PERFCTR_L1_INST_MISS = 0x4A,
+ ARMV7_PERFCTR_L1_DATA_COLORING = 0x4B,
+ ARMV7_PERFCTR_L1_NEON_DATA = 0x4C,
+ ARMV7_PERFCTR_L1_NEON_CACH_DATA = 0x4D,
+ ARMV7_PERFCTR_L2_NEON = 0x4E,
+ ARMV7_PERFCTR_L2_NEON_HIT = 0x4F,
+ ARMV7_PERFCTR_L1_INST = 0x50,
+ ARMV7_PERFCTR_PC_RETURN_MIS_PRED = 0x51,
+ ARMV7_PERFCTR_PC_BRANCH_FAILED = 0x52,
+ ARMV7_PERFCTR_PC_BRANCH_TAKEN = 0x53,
+ ARMV7_PERFCTR_PC_BRANCH_EXECUTED = 0x54,
+ ARMV7_PERFCTR_OP_EXECUTED = 0x55,
+ ARMV7_PERFCTR_CYCLES_INST_STALL = 0x56,
+ ARMV7_PERFCTR_CYCLES_INST = 0x57,
+ ARMV7_PERFCTR_CYCLES_NEON_DATA_STALL = 0x58,
+ ARMV7_PERFCTR_CYCLES_NEON_INST_STALL = 0x59,
+ ARMV7_PERFCTR_NEON_CYCLES = 0x5A,
+
+ ARMV7_PERFCTR_PMU0_EVENTS = 0x70,
+ ARMV7_PERFCTR_PMU1_EVENTS = 0x71,
+ ARMV7_PERFCTR_PMU_EVENTS = 0x72,
+};
+
+/* ARMv7 Cortex-A9 specific event types */
+enum armv7_a9_perf_types {
+ ARMV7_PERFCTR_JAVA_HW_BYTECODE_EXEC = 0x40,
+ ARMV7_PERFCTR_JAVA_SW_BYTECODE_EXEC = 0x41,
+ ARMV7_PERFCTR_JAZELLE_BRANCH_EXEC = 0x42,
+
+ ARMV7_PERFCTR_COHERENT_LINE_MISS = 0x50,
+ ARMV7_PERFCTR_COHERENT_LINE_HIT = 0x51,
+
+ ARMV7_PERFCTR_ICACHE_DEP_STALL_CYCLES = 0x60,
+ ARMV7_PERFCTR_DCACHE_DEP_STALL_CYCLES = 0x61,
+ ARMV7_PERFCTR_TLB_MISS_DEP_STALL_CYCLES = 0x62,
+ ARMV7_PERFCTR_STREX_EXECUTED_PASSED = 0x63,
+ ARMV7_PERFCTR_STREX_EXECUTED_FAILED = 0x64,
+ ARMV7_PERFCTR_DATA_EVICTION = 0x65,
+ ARMV7_PERFCTR_ISSUE_STAGE_NO_INST = 0x66,
+ ARMV7_PERFCTR_ISSUE_STAGE_EMPTY = 0x67,
+ ARMV7_PERFCTR_INST_OUT_OF_RENAME_STAGE = 0x68,
+
+ ARMV7_PERFCTR_PREDICTABLE_FUNCT_RETURNS = 0x6E,
+
+ ARMV7_PERFCTR_MAIN_UNIT_EXECUTED_INST = 0x70,
+ ARMV7_PERFCTR_SECOND_UNIT_EXECUTED_INST = 0x71,
+ ARMV7_PERFCTR_LD_ST_UNIT_EXECUTED_INST = 0x72,
+ ARMV7_PERFCTR_FP_EXECUTED_INST = 0x73,
+ ARMV7_PERFCTR_NEON_EXECUTED_INST = 0x74,
+
+ ARMV7_PERFCTR_PLD_FULL_DEP_STALL_CYCLES = 0x80,
+ ARMV7_PERFCTR_DATA_WR_DEP_STALL_CYCLES = 0x81,
+ ARMV7_PERFCTR_ITLB_MISS_DEP_STALL_CYCLES = 0x82,
+ ARMV7_PERFCTR_DTLB_MISS_DEP_STALL_CYCLES = 0x83,
+ ARMV7_PERFCTR_MICRO_ITLB_MISS_DEP_STALL_CYCLES = 0x84,
+ ARMV7_PERFCTR_MICRO_DTLB_MISS_DEP_STALL_CYCLES = 0x85,
+ ARMV7_PERFCTR_DMB_DEP_STALL_CYCLES = 0x86,
+
+ ARMV7_PERFCTR_INTGR_CLK_ENABLED_CYCLES = 0x8A,
+ ARMV7_PERFCTR_DATA_ENGINE_CLK_EN_CYCLES = 0x8B,
+
+ ARMV7_PERFCTR_ISB_INST = 0x90,
+ ARMV7_PERFCTR_DSB_INST = 0x91,
+ ARMV7_PERFCTR_DMB_INST = 0x92,
+ ARMV7_PERFCTR_EXT_INTERRUPTS = 0x93,
+
+ ARMV7_PERFCTR_PLE_CACHE_LINE_RQST_COMPLETED = 0xA0,
+ ARMV7_PERFCTR_PLE_CACHE_LINE_RQST_SKIPPED = 0xA1,
+ ARMV7_PERFCTR_PLE_FIFO_FLUSH = 0xA2,
+ ARMV7_PERFCTR_PLE_RQST_COMPLETED = 0xA3,
+ ARMV7_PERFCTR_PLE_FIFO_OVERFLOW = 0xA4,
+ ARMV7_PERFCTR_PLE_RQST_PROG = 0xA5
+};
+
+/*
+ * Cortex-A8 HW events mapping
+ *
+ * The hardware events that we support. We do support cache operations but
+ * we have harvard caches and no way to combine instruction and data
+ * accesses/misses in hardware.
+ */
+static const unsigned armv7_a8_perf_map[PERF_COUNT_HW_MAX] = {
+ [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES,
+ [PERF_COUNT_HW_INSTRUCTIONS] = ARMV7_PERFCTR_INSTR_EXECUTED,
+ [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED,
+ [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED,
+ [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE,
+ [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
+ [PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_CLOCK_CYCLES,
+};
+
+static const unsigned armv7_a8_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
+ [PERF_COUNT_HW_CACHE_OP_MAX]
+ [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
+ [C(L1D)] = {
+ /*
+ * The performance counters don't differentiate between read
+ * and write accesses/misses so this isn't strictly correct,
+ * but it's the best we can do. Writes and reads get
+ * combined.
+ */
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS,
+ [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS,
+ [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(L1I)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_INST,
+ [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_INST_MISS,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_INST,
+ [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_INST_MISS,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(LL)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L2_ACCESS,
+ [C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACH_MISS,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L2_ACCESS,
+ [C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACH_MISS,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(DTLB)] = {
+ /*
+ * Only ITLB misses and DTLB refills are supported.
+ * If users want the DTLB refills misses a raw counter
+ * must be used.
+ */
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(ITLB)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(BPU)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE,
+ [C(RESULT_MISS)]
+ = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE,
+ [C(RESULT_MISS)]
+ = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+};
+
+/*
+ * Cortex-A9 HW events mapping
+ */
+static const unsigned armv7_a9_perf_map[PERF_COUNT_HW_MAX] = {
+ [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES,
+ [PERF_COUNT_HW_INSTRUCTIONS] =
+ ARMV7_PERFCTR_INST_OUT_OF_RENAME_STAGE,
+ [PERF_COUNT_HW_CACHE_REFERENCES] = ARMV7_PERFCTR_COHERENT_LINE_HIT,
+ [PERF_COUNT_HW_CACHE_MISSES] = ARMV7_PERFCTR_COHERENT_LINE_MISS,
+ [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE,
+ [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
+ [PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_CLOCK_CYCLES,
+};
+
+static const unsigned armv7_a9_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
+ [PERF_COUNT_HW_CACHE_OP_MAX]
+ [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
+ [C(L1D)] = {
+ /*
+ * The performance counters don't differentiate between read
+ * and write accesses/misses so this isn't strictly correct,
+ * but it's the best we can do. Writes and reads get
+ * combined.
+ */
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS,
+ [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS,
+ [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(L1I)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = ARMV7_PERFCTR_IFETCH_MISS,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = ARMV7_PERFCTR_IFETCH_MISS,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(LL)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(DTLB)] = {
+ /*
+ * Only ITLB misses and DTLB refills are supported.
+ * If users want the DTLB refills misses a raw counter
+ * must be used.
+ */
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(ITLB)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(BPU)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE,
+ [C(RESULT_MISS)]
+ = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE,
+ [C(RESULT_MISS)]
+ = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+};
+
+/*
+ * Perf Events counters
+ */
+enum armv7_counters {
+ ARMV7_CYCLE_COUNTER = 1, /* Cycle counter */
+ ARMV7_COUNTER0 = 2, /* First event counter */
+};
+
+/*
+ * The cycle counter is ARMV7_CYCLE_COUNTER.
+ * The first event counter is ARMV7_COUNTER0.
+ * The last event counter is (ARMV7_COUNTER0 + armpmu->num_events - 1).
+ */
+#define ARMV7_COUNTER_LAST (ARMV7_COUNTER0 + armpmu->num_events - 1)
+
+/*
+ * ARMv7 low level PMNC access
+ */
+
+/*
+ * Per-CPU PMNC: config reg
+ */
+#define ARMV7_PMNC_E (1 << 0) /* Enable all counters */
+#define ARMV7_PMNC_P (1 << 1) /* Reset all counters */
+#define ARMV7_PMNC_C (1 << 2) /* Cycle counter reset */
+#define ARMV7_PMNC_D (1 << 3) /* CCNT counts every 64th cpu cycle */
+#define ARMV7_PMNC_X (1 << 4) /* Export to ETM */
+#define ARMV7_PMNC_DP (1 << 5) /* Disable CCNT if non-invasive debug*/
+#define ARMV7_PMNC_N_SHIFT 11 /* Number of counters supported */
+#define ARMV7_PMNC_N_MASK 0x1f
+#define ARMV7_PMNC_MASK 0x3f /* Mask for writable bits */
+
+/*
+ * Available counters
+ */
+#define ARMV7_CNT0 0 /* First event counter */
+#define ARMV7_CCNT 31 /* Cycle counter */
+
+/* Perf Event to low level counters mapping */
+#define ARMV7_EVENT_CNT_TO_CNTx (ARMV7_COUNTER0 - ARMV7_CNT0)
+
+/*
+ * CNTENS: counters enable reg
+ */
+#define ARMV7_CNTENS_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
+#define ARMV7_CNTENS_C (1 << ARMV7_CCNT)
+
+/*
+ * CNTENC: counters disable reg
+ */
+#define ARMV7_CNTENC_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
+#define ARMV7_CNTENC_C (1 << ARMV7_CCNT)
+
+/*
+ * INTENS: counters overflow interrupt enable reg
+ */
+#define ARMV7_INTENS_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
+#define ARMV7_INTENS_C (1 << ARMV7_CCNT)
+
+/*
+ * INTENC: counters overflow interrupt disable reg
+ */
+#define ARMV7_INTENC_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
+#define ARMV7_INTENC_C (1 << ARMV7_CCNT)
+
+/*
+ * EVTSEL: Event selection reg
+ */
+#define ARMV7_EVTSEL_MASK 0xff /* Mask for writable bits */
+
+/*
+ * SELECT: Counter selection reg
+ */
+#define ARMV7_SELECT_MASK 0x1f /* Mask for writable bits */
+
+/*
+ * FLAG: counters overflow flag status reg
+ */
+#define ARMV7_FLAG_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx))
+#define ARMV7_FLAG_C (1 << ARMV7_CCNT)
+#define ARMV7_FLAG_MASK 0xffffffff /* Mask for writable bits */
+#define ARMV7_OVERFLOWED_MASK ARMV7_FLAG_MASK
+
+static inline unsigned long armv7_pmnc_read(void)
+{
+ u32 val;
+ asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r"(val));
+ return val;
+}
+
+static inline void armv7_pmnc_write(unsigned long val)
+{
+ val &= ARMV7_PMNC_MASK;
+ asm volatile("mcr p15, 0, %0, c9, c12, 0" : : "r"(val));
+}
+
+static inline int armv7_pmnc_has_overflowed(unsigned long pmnc)
+{
+ return pmnc & ARMV7_OVERFLOWED_MASK;
+}
+
+static inline int armv7_pmnc_counter_has_overflowed(unsigned long pmnc,
+ enum armv7_counters counter)
+{
+ int ret = 0;
+
+ if (counter == ARMV7_CYCLE_COUNTER)
+ ret = pmnc & ARMV7_FLAG_C;
+ else if ((counter >= ARMV7_COUNTER0) && (counter <= ARMV7_COUNTER_LAST))
+ ret = pmnc & ARMV7_FLAG_P(counter);
+ else
+ pr_err("CPU%u checking wrong counter %d overflow status\n",
+ smp_processor_id(), counter);
+
+ return ret;
+}
+
+static inline int armv7_pmnc_select_counter(unsigned int idx)
+{
+ u32 val;
+
+ if ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST)) {
+ pr_err("CPU%u selecting wrong PMNC counter"
+ " %d\n", smp_processor_id(), idx);
+ return -1;
+ }
+
+ val = (idx - ARMV7_EVENT_CNT_TO_CNTx) & ARMV7_SELECT_MASK;
+ asm volatile("mcr p15, 0, %0, c9, c12, 5" : : "r" (val));
+
+ return idx;
+}
+
+static inline u32 armv7pmu_read_counter(int idx)
+{
+ unsigned long value = 0;
+
+ if (idx == ARMV7_CYCLE_COUNTER)
+ asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (value));
+ else if ((idx >= ARMV7_COUNTER0) && (idx <= ARMV7_COUNTER_LAST)) {
+ if (armv7_pmnc_select_counter(idx) == idx)
+ asm volatile("mrc p15, 0, %0, c9, c13, 2"
+ : "=r" (value));
+ } else
+ pr_err("CPU%u reading wrong counter %d\n",
+ smp_processor_id(), idx);
+
+ return value;
+}
+
+static inline void armv7pmu_write_counter(int idx, u32 value)
+{
+ if (idx == ARMV7_CYCLE_COUNTER)
+ asm volatile("mcr p15, 0, %0, c9, c13, 0" : : "r" (value));
+ else if ((idx >= ARMV7_COUNTER0) && (idx <= ARMV7_COUNTER_LAST)) {
+ if (armv7_pmnc_select_counter(idx) == idx)
+ asm volatile("mcr p15, 0, %0, c9, c13, 2"
+ : : "r" (value));
+ } else
+ pr_err("CPU%u writing wrong counter %d\n",
+ smp_processor_id(), idx);
+}
+
+static inline void armv7_pmnc_write_evtsel(unsigned int idx, u32 val)
+{
+ if (armv7_pmnc_select_counter(idx) == idx) {
+ val &= ARMV7_EVTSEL_MASK;
+ asm volatile("mcr p15, 0, %0, c9, c13, 1" : : "r" (val));
+ }
+}
+
+static inline u32 armv7_pmnc_enable_counter(unsigned int idx)
+{
+ u32 val;
+
+ if ((idx != ARMV7_CYCLE_COUNTER) &&
+ ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) {
+ pr_err("CPU%u enabling wrong PMNC counter"
+ " %d\n", smp_processor_id(), idx);
+ return -1;
+ }
+
+ if (idx == ARMV7_CYCLE_COUNTER)
+ val = ARMV7_CNTENS_C;
+ else
+ val = ARMV7_CNTENS_P(idx);
+
+ asm volatile("mcr p15, 0, %0, c9, c12, 1" : : "r" (val));
+
+ return idx;
+}
+
+static inline u32 armv7_pmnc_disable_counter(unsigned int idx)
+{
+ u32 val;
+
+
+ if ((idx != ARMV7_CYCLE_COUNTER) &&
+ ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) {
+ pr_err("CPU%u disabling wrong PMNC counter"
+ " %d\n", smp_processor_id(), idx);
+ return -1;
+ }
+
+ if (idx == ARMV7_CYCLE_COUNTER)
+ val = ARMV7_CNTENC_C;
+ else
+ val = ARMV7_CNTENC_P(idx);
+
+ asm volatile("mcr p15, 0, %0, c9, c12, 2" : : "r" (val));
+
+ return idx;
+}
+
+static inline u32 armv7_pmnc_enable_intens(unsigned int idx)
+{
+ u32 val;
+
+ if ((idx != ARMV7_CYCLE_COUNTER) &&
+ ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) {
+ pr_err("CPU%u enabling wrong PMNC counter"
+ " interrupt enable %d\n", smp_processor_id(), idx);
+ return -1;
+ }
+
+ if (idx == ARMV7_CYCLE_COUNTER)
+ val = ARMV7_INTENS_C;
+ else
+ val = ARMV7_INTENS_P(idx);
+
+ asm volatile("mcr p15, 0, %0, c9, c14, 1" : : "r" (val));
+
+ return idx;
+}
+
+static inline u32 armv7_pmnc_disable_intens(unsigned int idx)
+{
+ u32 val;
+
+ if ((idx != ARMV7_CYCLE_COUNTER) &&
+ ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) {
+ pr_err("CPU%u disabling wrong PMNC counter"
+ " interrupt enable %d\n", smp_processor_id(), idx);
+ return -1;
+ }
+
+ if (idx == ARMV7_CYCLE_COUNTER)
+ val = ARMV7_INTENC_C;
+ else
+ val = ARMV7_INTENC_P(idx);
+
+ asm volatile("mcr p15, 0, %0, c9, c14, 2" : : "r" (val));
+
+ return idx;
+}
+
+static inline u32 armv7_pmnc_getreset_flags(void)
+{
+ u32 val;
+
+ /* Read */
+ asm volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (val));
+
+ /* Write to clear flags */
+ val &= ARMV7_FLAG_MASK;
+ asm volatile("mcr p15, 0, %0, c9, c12, 3" : : "r" (val));
+
+ return val;
+}
+
+#ifdef DEBUG
+static void armv7_pmnc_dump_regs(void)
+{
+ u32 val;
+ unsigned int cnt;
+
+ printk(KERN_INFO "PMNC registers dump:\n");
+
+ asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r" (val));
+ printk(KERN_INFO "PMNC =0x%08x\n", val);
+
+ asm volatile("mrc p15, 0, %0, c9, c12, 1" : "=r" (val));
+ printk(KERN_INFO "CNTENS=0x%08x\n", val);
+
+ asm volatile("mrc p15, 0, %0, c9, c14, 1" : "=r" (val));
+ printk(KERN_INFO "INTENS=0x%08x\n", val);
+
+ asm volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (val));
+ printk(KERN_INFO "FLAGS =0x%08x\n", val);
+
+ asm volatile("mrc p15, 0, %0, c9, c12, 5" : "=r" (val));
+ printk(KERN_INFO "SELECT=0x%08x\n", val);
+
+ asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (val));
+ printk(KERN_INFO "CCNT =0x%08x\n", val);
+
+ for (cnt = ARMV7_COUNTER0; cnt < ARMV7_COUNTER_LAST; cnt++) {
+ armv7_pmnc_select_counter(cnt);
+ asm volatile("mrc p15, 0, %0, c9, c13, 2" : "=r" (val));
+ printk(KERN_INFO "CNT[%d] count =0x%08x\n",
+ cnt-ARMV7_EVENT_CNT_TO_CNTx, val);
+ asm volatile("mrc p15, 0, %0, c9, c13, 1" : "=r" (val));
+ printk(KERN_INFO "CNT[%d] evtsel=0x%08x\n",
+ cnt-ARMV7_EVENT_CNT_TO_CNTx, val);
+ }
+}
+#endif
+
+void armv7pmu_enable_event(struct hw_perf_event *hwc, int idx)
+{
+ unsigned long flags;
+
+ /*
+ * Enable counter and interrupt, and set the counter to count
+ * the event that we're interested in.
+ */
+ spin_lock_irqsave(&pmu_lock, flags);
+
+ /*
+ * Disable counter
+ */
+ armv7_pmnc_disable_counter(idx);
+
+ /*
+ * Set event (if destined for PMNx counters)
+ * We don't need to set the event if it's a cycle count
+ */
+ if (idx != ARMV7_CYCLE_COUNTER)
+ armv7_pmnc_write_evtsel(idx, hwc->config_base);
+
+ /*
+ * Enable interrupt for this counter
+ */
+ armv7_pmnc_enable_intens(idx);
+
+ /*
+ * Enable counter
+ */
+ armv7_pmnc_enable_counter(idx);
+
+ spin_unlock_irqrestore(&pmu_lock, flags);
+}
+
+static void armv7pmu_disable_event(struct hw_perf_event *hwc, int idx)
+{
+ unsigned long flags;
+
+ /*
+ * Disable counter and interrupt
+ */
+ spin_lock_irqsave(&pmu_lock, flags);
+
+ /*
+ * Disable counter
+ */
+ armv7_pmnc_disable_counter(idx);
+
+ /*
+ * Disable interrupt for this counter
+ */
+ armv7_pmnc_disable_intens(idx);
+
+ spin_unlock_irqrestore(&pmu_lock, flags);
+}
+
+static irqreturn_t armv7pmu_handle_irq(int irq_num, void *dev)
+{
+ unsigned long pmnc;
+ struct perf_sample_data data;
+ struct cpu_hw_events *cpuc;
+ struct pt_regs *regs;
+ int idx;
+
+ /*
+ * Get and reset the IRQ flags
+ */
+ pmnc = armv7_pmnc_getreset_flags();
+
+ /*
+ * Did an overflow occur?
+ */
+ if (!armv7_pmnc_has_overflowed(pmnc))
+ return IRQ_NONE;
+
+ /*
+ * Handle the counter(s) overflow(s)
+ */
+ regs = get_irq_regs();
+
+ perf_sample_data_init(&data, 0);
+
+ cpuc = &__get_cpu_var(cpu_hw_events);
+ for (idx = 0; idx <= armpmu->num_events; ++idx) {
+ struct perf_event *event = cpuc->events[idx];
+ struct hw_perf_event *hwc;
+
+ if (!test_bit(idx, cpuc->active_mask))
+ continue;
+
+ /*
+ * We have a single interrupt for all counters. Check that
+ * each counter has overflowed before we process it.
+ */
+ if (!armv7_pmnc_counter_has_overflowed(pmnc, idx))
+ continue;
+
+ hwc = &event->hw;
+ armpmu_event_update(event, hwc, idx);
+ data.period = event->hw.last_period;
+ if (!armpmu_event_set_period(event, hwc, idx))
+ continue;
+
+ if (perf_event_overflow(event, 0, &data, regs))
+ armpmu->disable(hwc, idx);
+ }
+
+ /*
+ * Handle the pending perf events.
+ *
+ * Note: this call *must* be run with interrupts disabled. For
+ * platforms that can have the PMU interrupts raised as an NMI, this
+ * will not work.
+ */
+ irq_work_run();
+
+ return IRQ_HANDLED;
+}
+
+static void armv7pmu_start(void)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&pmu_lock, flags);
+ /* Enable all counters */
+ armv7_pmnc_write(armv7_pmnc_read() | ARMV7_PMNC_E);
+ spin_unlock_irqrestore(&pmu_lock, flags);
+}
+
+static void armv7pmu_stop(void)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&pmu_lock, flags);
+ /* Disable all counters */
+ armv7_pmnc_write(armv7_pmnc_read() & ~ARMV7_PMNC_E);
+ spin_unlock_irqrestore(&pmu_lock, flags);
+}
+
+static int armv7pmu_get_event_idx(struct cpu_hw_events *cpuc,
+ struct hw_perf_event *event)
+{
+ int idx;
+
+ /* Always place a cycle counter into the cycle counter. */
+ if (event->config_base == ARMV7_PERFCTR_CPU_CYCLES) {
+ if (test_and_set_bit(ARMV7_CYCLE_COUNTER, cpuc->used_mask))
+ return -EAGAIN;
+
+ return ARMV7_CYCLE_COUNTER;
+ } else {
+ /*
+ * For anything other than a cycle counter, try and use
+ * the events counters
+ */
+ for (idx = ARMV7_COUNTER0; idx <= armpmu->num_events; ++idx) {
+ if (!test_and_set_bit(idx, cpuc->used_mask))
+ return idx;
+ }
+
+ /* The counters are all in use. */
+ return -EAGAIN;
+ }
+}
+
+static struct arm_pmu armv7pmu = {
+ .handle_irq = armv7pmu_handle_irq,
+ .enable = armv7pmu_enable_event,
+ .disable = armv7pmu_disable_event,
+ .read_counter = armv7pmu_read_counter,
+ .write_counter = armv7pmu_write_counter,
+ .get_event_idx = armv7pmu_get_event_idx,
+ .start = armv7pmu_start,
+ .stop = armv7pmu_stop,
+ .raw_event_mask = 0xFF,
+ .max_period = (1LLU << 32) - 1,
+};
+
+static u32 __init armv7_reset_read_pmnc(void)
+{
+ u32 nb_cnt;
+
+ /* Initialize & Reset PMNC: C and P bits */
+ armv7_pmnc_write(ARMV7_PMNC_P | ARMV7_PMNC_C);
+
+ /* Read the nb of CNTx counters supported from PMNC */
+ nb_cnt = (armv7_pmnc_read() >> ARMV7_PMNC_N_SHIFT) & ARMV7_PMNC_N_MASK;
+
+ /* Add the CPU cycles counter and return */
+ return nb_cnt + 1;
+}
+
+const struct arm_pmu *__init armv7_a8_pmu_init(void)
+{
+ armv7pmu.id = ARM_PERF_PMU_ID_CA8;
+ armv7pmu.name = "ARMv7 Cortex-A8";
+ armv7pmu.cache_map = &armv7_a8_perf_cache_map;
+ armv7pmu.event_map = &armv7_a8_perf_map;
+ armv7pmu.num_events = armv7_reset_read_pmnc();
+ return &armv7pmu;
+}
+
+const struct arm_pmu *__init armv7_a9_pmu_init(void)
+{
+ armv7pmu.id = ARM_PERF_PMU_ID_CA9;
+ armv7pmu.name = "ARMv7 Cortex-A9";
+ armv7pmu.cache_map = &armv7_a9_perf_cache_map;
+ armv7pmu.event_map = &armv7_a9_perf_map;
+ armv7pmu.num_events = armv7_reset_read_pmnc();
+ return &armv7pmu;
+}
+#else
+const struct arm_pmu *__init armv7_a8_pmu_init(void)
+{
+ return NULL;
+}
+
+const struct arm_pmu *__init armv7_a9_pmu_init(void)
+{
+ return NULL;
+}
+#endif /* CONFIG_CPU_V7 */
--- /dev/null
+/*
+ * ARMv5 [xscale] Performance counter handling code.
+ *
+ * Copyright (C) 2010, ARM Ltd., Will Deacon <will.deacon@arm.com>
+ *
+ * Based on the previous xscale OProfile code.
+ *
+ * There are two variants of the xscale PMU that we support:
+ * - xscale1pmu: 2 event counters and a cycle counter
+ * - xscale2pmu: 4 event counters and a cycle counter
+ * The two variants share event definitions, but have different
+ * PMU structures.
+ */
+
+#ifdef CONFIG_CPU_XSCALE
+enum xscale_perf_types {
+ XSCALE_PERFCTR_ICACHE_MISS = 0x00,
+ XSCALE_PERFCTR_ICACHE_NO_DELIVER = 0x01,
+ XSCALE_PERFCTR_DATA_STALL = 0x02,
+ XSCALE_PERFCTR_ITLB_MISS = 0x03,
+ XSCALE_PERFCTR_DTLB_MISS = 0x04,
+ XSCALE_PERFCTR_BRANCH = 0x05,
+ XSCALE_PERFCTR_BRANCH_MISS = 0x06,
+ XSCALE_PERFCTR_INSTRUCTION = 0x07,
+ XSCALE_PERFCTR_DCACHE_FULL_STALL = 0x08,
+ XSCALE_PERFCTR_DCACHE_FULL_STALL_CONTIG = 0x09,
+ XSCALE_PERFCTR_DCACHE_ACCESS = 0x0A,
+ XSCALE_PERFCTR_DCACHE_MISS = 0x0B,
+ XSCALE_PERFCTR_DCACHE_WRITE_BACK = 0x0C,
+ XSCALE_PERFCTR_PC_CHANGED = 0x0D,
+ XSCALE_PERFCTR_BCU_REQUEST = 0x10,
+ XSCALE_PERFCTR_BCU_FULL = 0x11,
+ XSCALE_PERFCTR_BCU_DRAIN = 0x12,
+ XSCALE_PERFCTR_BCU_ECC_NO_ELOG = 0x14,
+ XSCALE_PERFCTR_BCU_1_BIT_ERR = 0x15,
+ XSCALE_PERFCTR_RMW = 0x16,
+ /* XSCALE_PERFCTR_CCNT is not hardware defined */
+ XSCALE_PERFCTR_CCNT = 0xFE,
+ XSCALE_PERFCTR_UNUSED = 0xFF,
+};
+
+enum xscale_counters {
+ XSCALE_CYCLE_COUNTER = 1,
+ XSCALE_COUNTER0,
+ XSCALE_COUNTER1,
+ XSCALE_COUNTER2,
+ XSCALE_COUNTER3,
+};
+
+static const unsigned xscale_perf_map[PERF_COUNT_HW_MAX] = {
+ [PERF_COUNT_HW_CPU_CYCLES] = XSCALE_PERFCTR_CCNT,
+ [PERF_COUNT_HW_INSTRUCTIONS] = XSCALE_PERFCTR_INSTRUCTION,
+ [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED,
+ [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED,
+ [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = XSCALE_PERFCTR_BRANCH,
+ [PERF_COUNT_HW_BRANCH_MISSES] = XSCALE_PERFCTR_BRANCH_MISS,
+ [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED,
+};
+
+static const unsigned xscale_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
+ [PERF_COUNT_HW_CACHE_OP_MAX]
+ [PERF_COUNT_HW_CACHE_RESULT_MAX] = {
+ [C(L1D)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = XSCALE_PERFCTR_DCACHE_ACCESS,
+ [C(RESULT_MISS)] = XSCALE_PERFCTR_DCACHE_MISS,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = XSCALE_PERFCTR_DCACHE_ACCESS,
+ [C(RESULT_MISS)] = XSCALE_PERFCTR_DCACHE_MISS,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(L1I)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = XSCALE_PERFCTR_ICACHE_MISS,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = XSCALE_PERFCTR_ICACHE_MISS,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(LL)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(DTLB)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = XSCALE_PERFCTR_DTLB_MISS,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = XSCALE_PERFCTR_DTLB_MISS,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(ITLB)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = XSCALE_PERFCTR_ITLB_MISS,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = XSCALE_PERFCTR_ITLB_MISS,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+ [C(BPU)] = {
+ [C(OP_READ)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ [C(OP_WRITE)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ [C(OP_PREFETCH)] = {
+ [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED,
+ [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED,
+ },
+ },
+};
+
+#define XSCALE_PMU_ENABLE 0x001
+#define XSCALE_PMN_RESET 0x002
+#define XSCALE_CCNT_RESET 0x004
+#define XSCALE_PMU_RESET (CCNT_RESET | PMN_RESET)
+#define XSCALE_PMU_CNT64 0x008
+
+#define XSCALE1_OVERFLOWED_MASK 0x700
+#define XSCALE1_CCOUNT_OVERFLOW 0x400
+#define XSCALE1_COUNT0_OVERFLOW 0x100
+#define XSCALE1_COUNT1_OVERFLOW 0x200
+#define XSCALE1_CCOUNT_INT_EN 0x040
+#define XSCALE1_COUNT0_INT_EN 0x010
+#define XSCALE1_COUNT1_INT_EN 0x020
+#define XSCALE1_COUNT0_EVT_SHFT 12
+#define XSCALE1_COUNT0_EVT_MASK (0xff << XSCALE1_COUNT0_EVT_SHFT)
+#define XSCALE1_COUNT1_EVT_SHFT 20
+#define XSCALE1_COUNT1_EVT_MASK (0xff << XSCALE1_COUNT1_EVT_SHFT)
+
+static inline u32
+xscale1pmu_read_pmnc(void)
+{
+ u32 val;
+ asm volatile("mrc p14, 0, %0, c0, c0, 0" : "=r" (val));
+ return val;
+}
+
+static inline void
+xscale1pmu_write_pmnc(u32 val)
+{
+ /* upper 4bits and 7, 11 are write-as-0 */
+ val &= 0xffff77f;
+ asm volatile("mcr p14, 0, %0, c0, c0, 0" : : "r" (val));
+}
+
+static inline int
+xscale1_pmnc_counter_has_overflowed(unsigned long pmnc,
+ enum xscale_counters counter)
+{
+ int ret = 0;
+
+ switch (counter) {
+ case XSCALE_CYCLE_COUNTER:
+ ret = pmnc & XSCALE1_CCOUNT_OVERFLOW;
+ break;
+ case XSCALE_COUNTER0:
+ ret = pmnc & XSCALE1_COUNT0_OVERFLOW;
+ break;
+ case XSCALE_COUNTER1:
+ ret = pmnc & XSCALE1_COUNT1_OVERFLOW;
+ break;
+ default:
+ WARN_ONCE(1, "invalid counter number (%d)\n", counter);
+ }
+
+ return ret;
+}
+
+static irqreturn_t
+xscale1pmu_handle_irq(int irq_num, void *dev)
+{
+ unsigned long pmnc;
+ struct perf_sample_data data;
+ struct cpu_hw_events *cpuc;
+ struct pt_regs *regs;
+ int idx;
+
+ /*
+ * NOTE: there's an A stepping erratum that states if an overflow
+ * bit already exists and another occurs, the previous
+ * Overflow bit gets cleared. There's no workaround.
+ * Fixed in B stepping or later.
+ */
+ pmnc = xscale1pmu_read_pmnc();
+
+ /*
+ * Write the value back to clear the overflow flags. Overflow
+ * flags remain in pmnc for use below. We also disable the PMU
+ * while we process the interrupt.
+ */
+ xscale1pmu_write_pmnc(pmnc & ~XSCALE_PMU_ENABLE);
+
+ if (!(pmnc & XSCALE1_OVERFLOWED_MASK))
+ return IRQ_NONE;
+
+ regs = get_irq_regs();
+
+ perf_sample_data_init(&data, 0);
+
+ cpuc = &__get_cpu_var(cpu_hw_events);
+ for (idx = 0; idx <= armpmu->num_events; ++idx) {
+ struct perf_event *event = cpuc->events[idx];
+ struct hw_perf_event *hwc;
+
+ if (!test_bit(idx, cpuc->active_mask))
+ continue;
+
+ if (!xscale1_pmnc_counter_has_overflowed(pmnc, idx))
+ continue;
+
+ hwc = &event->hw;
+ armpmu_event_update(event, hwc, idx);
+ data.period = event->hw.last_period;
+ if (!armpmu_event_set_period(event, hwc, idx))
+ continue;
+
+ if (perf_event_overflow(event, 0, &data, regs))
+ armpmu->disable(hwc, idx);
+ }
+
+ irq_work_run();
+
+ /*
+ * Re-enable the PMU.
+ */
+ pmnc = xscale1pmu_read_pmnc() | XSCALE_PMU_ENABLE;
+ xscale1pmu_write_pmnc(pmnc);
+
+ return IRQ_HANDLED;
+}
+
+static void
+xscale1pmu_enable_event(struct hw_perf_event *hwc, int idx)
+{
+ unsigned long val, mask, evt, flags;
+
+ switch (idx) {
+ case XSCALE_CYCLE_COUNTER:
+ mask = 0;
+ evt = XSCALE1_CCOUNT_INT_EN;
+ break;
+ case XSCALE_COUNTER0:
+ mask = XSCALE1_COUNT0_EVT_MASK;
+ evt = (hwc->config_base << XSCALE1_COUNT0_EVT_SHFT) |
+ XSCALE1_COUNT0_INT_EN;
+ break;
+ case XSCALE_COUNTER1:
+ mask = XSCALE1_COUNT1_EVT_MASK;
+ evt = (hwc->config_base << XSCALE1_COUNT1_EVT_SHFT) |
+ XSCALE1_COUNT1_INT_EN;
+ break;
+ default:
+ WARN_ONCE(1, "invalid counter number (%d)\n", idx);
+ return;
+ }
+
+ spin_lock_irqsave(&pmu_lock, flags);
+ val = xscale1pmu_read_pmnc();
+ val &= ~mask;
+ val |= evt;
+ xscale1pmu_write_pmnc(val);
+ spin_unlock_irqrestore(&pmu_lock, flags);
+}
+
+static void
+xscale1pmu_disable_event(struct hw_perf_event *hwc, int idx)
+{
+ unsigned long val, mask, evt, flags;
+
+ switch (idx) {
+ case XSCALE_CYCLE_COUNTER:
+ mask = XSCALE1_CCOUNT_INT_EN;
+ evt = 0;
+ break;
+ case XSCALE_COUNTER0:
+ mask = XSCALE1_COUNT0_INT_EN | XSCALE1_COUNT0_EVT_MASK;
+ evt = XSCALE_PERFCTR_UNUSED << XSCALE1_COUNT0_EVT_SHFT;
+ break;
+ case XSCALE_COUNTER1:
+ mask = XSCALE1_COUNT1_INT_EN | XSCALE1_COUNT1_EVT_MASK;
+ evt = XSCALE_PERFCTR_UNUSED << XSCALE1_COUNT1_EVT_SHFT;
+ break;
+ default:
+ WARN_ONCE(1, "invalid counter number (%d)\n", idx);
+ return;
+ }
+
+ spin_lock_irqsave(&pmu_lock, flags);
+ val = xscale1pmu_read_pmnc();
+ val &= ~mask;
+ val |= evt;
+ xscale1pmu_write_pmnc(val);
+ spin_unlock_irqrestore(&pmu_lock, flags);
+}
+
+static int
+xscale1pmu_get_event_idx(struct cpu_hw_events *cpuc,
+ struct hw_perf_event *event)
+{
+ if (XSCALE_PERFCTR_CCNT == event->config_base) {
+ if (test_and_set_bit(XSCALE_CYCLE_COUNTER, cpuc->used_mask))
+ return -EAGAIN;
+
+ return XSCALE_CYCLE_COUNTER;
+ } else {
+ if (!test_and_set_bit(XSCALE_COUNTER1, cpuc->used_mask))
+ return XSCALE_COUNTER1;
+
+ if (!test_and_set_bit(XSCALE_COUNTER0, cpuc->used_mask))
+ return XSCALE_COUNTER0;
+
+ return -EAGAIN;
+ }
+}
+
+static void
+xscale1pmu_start(void)
+{
+ unsigned long flags, val;
+
+ spin_lock_irqsave(&pmu_lock, flags);
+ val = xscale1pmu_read_pmnc();
+ val |= XSCALE_PMU_ENABLE;
+ xscale1pmu_write_pmnc(val);
+ spin_unlock_irqrestore(&pmu_lock, flags);
+}
+
+static void
+xscale1pmu_stop(void)
+{
+ unsigned long flags, val;
+
+ spin_lock_irqsave(&pmu_lock, flags);
+ val = xscale1pmu_read_pmnc();
+ val &= ~XSCALE_PMU_ENABLE;
+ xscale1pmu_write_pmnc(val);
+ spin_unlock_irqrestore(&pmu_lock, flags);
+}
+
+static inline u32
+xscale1pmu_read_counter(int counter)
+{
+ u32 val = 0;
+
+ switch (counter) {
+ case XSCALE_CYCLE_COUNTER:
+ asm volatile("mrc p14, 0, %0, c1, c0, 0" : "=r" (val));
+ break;
+ case XSCALE_COUNTER0:
+ asm volatile("mrc p14, 0, %0, c2, c0, 0" : "=r" (val));
+ break;
+ case XSCALE_COUNTER1:
+ asm volatile("mrc p14, 0, %0, c3, c0, 0" : "=r" (val));
+ break;
+ }
+
+ return val;
+}
+
+static inline void
+xscale1pmu_write_counter(int counter, u32 val)
+{
+ switch (counter) {
+ case XSCALE_CYCLE_COUNTER:
+ asm volatile("mcr p14, 0, %0, c1, c0, 0" : : "r" (val));
+ break;
+ case XSCALE_COUNTER0:
+ asm volatile("mcr p14, 0, %0, c2, c0, 0" : : "r" (val));
+ break;
+ case XSCALE_COUNTER1:
+ asm volatile("mcr p14, 0, %0, c3, c0, 0" : : "r" (val));
+ break;
+ }
+}
+
+static const struct arm_pmu xscale1pmu = {
+ .id = ARM_PERF_PMU_ID_XSCALE1,
+ .name = "xscale1",
+ .handle_irq = xscale1pmu_handle_irq,
+ .enable = xscale1pmu_enable_event,
+ .disable = xscale1pmu_disable_event,
+ .read_counter = xscale1pmu_read_counter,
+ .write_counter = xscale1pmu_write_counter,
+ .get_event_idx = xscale1pmu_get_event_idx,
+ .start = xscale1pmu_start,
+ .stop = xscale1pmu_stop,
+ .cache_map = &xscale_perf_cache_map,
+ .event_map = &xscale_perf_map,
+ .raw_event_mask = 0xFF,
+ .num_events = 3,
+ .max_period = (1LLU << 32) - 1,
+};
+
+const struct arm_pmu *__init xscale1pmu_init(void)
+{
+ return &xscale1pmu;
+}
+
+#define XSCALE2_OVERFLOWED_MASK 0x01f
+#define XSCALE2_CCOUNT_OVERFLOW 0x001
+#define XSCALE2_COUNT0_OVERFLOW 0x002
+#define XSCALE2_COUNT1_OVERFLOW 0x004
+#define XSCALE2_COUNT2_OVERFLOW 0x008
+#define XSCALE2_COUNT3_OVERFLOW 0x010
+#define XSCALE2_CCOUNT_INT_EN 0x001
+#define XSCALE2_COUNT0_INT_EN 0x002
+#define XSCALE2_COUNT1_INT_EN 0x004
+#define XSCALE2_COUNT2_INT_EN 0x008
+#define XSCALE2_COUNT3_INT_EN 0x010
+#define XSCALE2_COUNT0_EVT_SHFT 0
+#define XSCALE2_COUNT0_EVT_MASK (0xff << XSCALE2_COUNT0_EVT_SHFT)
+#define XSCALE2_COUNT1_EVT_SHFT 8
+#define XSCALE2_COUNT1_EVT_MASK (0xff << XSCALE2_COUNT1_EVT_SHFT)
+#define XSCALE2_COUNT2_EVT_SHFT 16
+#define XSCALE2_COUNT2_EVT_MASK (0xff << XSCALE2_COUNT2_EVT_SHFT)
+#define XSCALE2_COUNT3_EVT_SHFT 24
+#define XSCALE2_COUNT3_EVT_MASK (0xff << XSCALE2_COUNT3_EVT_SHFT)
+
+static inline u32
+xscale2pmu_read_pmnc(void)
+{
+ u32 val;
+ asm volatile("mrc p14, 0, %0, c0, c1, 0" : "=r" (val));
+ /* bits 1-2 and 4-23 are read-unpredictable */
+ return val & 0xff000009;
+}
+
+static inline void
+xscale2pmu_write_pmnc(u32 val)
+{
+ /* bits 4-23 are write-as-0, 24-31 are write ignored */
+ val &= 0xf;
+ asm volatile("mcr p14, 0, %0, c0, c1, 0" : : "r" (val));
+}
+
+static inline u32
+xscale2pmu_read_overflow_flags(void)
+{
+ u32 val;
+ asm volatile("mrc p14, 0, %0, c5, c1, 0" : "=r" (val));
+ return val;
+}
+
+static inline void
+xscale2pmu_write_overflow_flags(u32 val)
+{
+ asm volatile("mcr p14, 0, %0, c5, c1, 0" : : "r" (val));
+}
+
+static inline u32
+xscale2pmu_read_event_select(void)
+{
+ u32 val;
+ asm volatile("mrc p14, 0, %0, c8, c1, 0" : "=r" (val));
+ return val;
+}
+
+static inline void
+xscale2pmu_write_event_select(u32 val)
+{
+ asm volatile("mcr p14, 0, %0, c8, c1, 0" : : "r"(val));
+}
+
+static inline u32
+xscale2pmu_read_int_enable(void)
+{
+ u32 val;
+ asm volatile("mrc p14, 0, %0, c4, c1, 0" : "=r" (val));
+ return val;
+}
+
+static void
+xscale2pmu_write_int_enable(u32 val)
+{
+ asm volatile("mcr p14, 0, %0, c4, c1, 0" : : "r" (val));
+}
+
+static inline int
+xscale2_pmnc_counter_has_overflowed(unsigned long of_flags,
+ enum xscale_counters counter)
+{
+ int ret = 0;
+
+ switch (counter) {
+ case XSCALE_CYCLE_COUNTER:
+ ret = of_flags & XSCALE2_CCOUNT_OVERFLOW;
+ break;
+ case XSCALE_COUNTER0:
+ ret = of_flags & XSCALE2_COUNT0_OVERFLOW;
+ break;
+ case XSCALE_COUNTER1:
+ ret = of_flags & XSCALE2_COUNT1_OVERFLOW;
+ break;
+ case XSCALE_COUNTER2:
+ ret = of_flags & XSCALE2_COUNT2_OVERFLOW;
+ break;
+ case XSCALE_COUNTER3:
+ ret = of_flags & XSCALE2_COUNT3_OVERFLOW;
+ break;
+ default:
+ WARN_ONCE(1, "invalid counter number (%d)\n", counter);
+ }
+
+ return ret;
+}
+
+static irqreturn_t
+xscale2pmu_handle_irq(int irq_num, void *dev)
+{
+ unsigned long pmnc, of_flags;
+ struct perf_sample_data data;
+ struct cpu_hw_events *cpuc;
+ struct pt_regs *regs;
+ int idx;
+
+ /* Disable the PMU. */
+ pmnc = xscale2pmu_read_pmnc();
+ xscale2pmu_write_pmnc(pmnc & ~XSCALE_PMU_ENABLE);
+
+ /* Check the overflow flag register. */
+ of_flags = xscale2pmu_read_overflow_flags();
+ if (!(of_flags & XSCALE2_OVERFLOWED_MASK))
+ return IRQ_NONE;
+
+ /* Clear the overflow bits. */
+ xscale2pmu_write_overflow_flags(of_flags);
+
+ regs = get_irq_regs();
+
+ perf_sample_data_init(&data, 0);
+
+ cpuc = &__get_cpu_var(cpu_hw_events);
+ for (idx = 0; idx <= armpmu->num_events; ++idx) {
+ struct perf_event *event = cpuc->events[idx];
+ struct hw_perf_event *hwc;
+
+ if (!test_bit(idx, cpuc->active_mask))
+ continue;
+
+ if (!xscale2_pmnc_counter_has_overflowed(pmnc, idx))
+ continue;
+
+ hwc = &event->hw;
+ armpmu_event_update(event, hwc, idx);
+ data.period = event->hw.last_period;
+ if (!armpmu_event_set_period(event, hwc, idx))
+ continue;
+
+ if (perf_event_overflow(event, 0, &data, regs))
+ armpmu->disable(hwc, idx);
+ }
+
+ irq_work_run();
+
+ /*
+ * Re-enable the PMU.
+ */
+ pmnc = xscale2pmu_read_pmnc() | XSCALE_PMU_ENABLE;
+ xscale2pmu_write_pmnc(pmnc);
+
+ return IRQ_HANDLED;
+}
+
+static void
+xscale2pmu_enable_event(struct hw_perf_event *hwc, int idx)
+{
+ unsigned long flags, ien, evtsel;
+
+ ien = xscale2pmu_read_int_enable();
+ evtsel = xscale2pmu_read_event_select();
+
+ switch (idx) {
+ case XSCALE_CYCLE_COUNTER:
+ ien |= XSCALE2_CCOUNT_INT_EN;
+ break;
+ case XSCALE_COUNTER0:
+ ien |= XSCALE2_COUNT0_INT_EN;
+ evtsel &= ~XSCALE2_COUNT0_EVT_MASK;
+ evtsel |= hwc->config_base << XSCALE2_COUNT0_EVT_SHFT;
+ break;
+ case XSCALE_COUNTER1:
+ ien |= XSCALE2_COUNT1_INT_EN;
+ evtsel &= ~XSCALE2_COUNT1_EVT_MASK;
+ evtsel |= hwc->config_base << XSCALE2_COUNT1_EVT_SHFT;
+ break;
+ case XSCALE_COUNTER2:
+ ien |= XSCALE2_COUNT2_INT_EN;
+ evtsel &= ~XSCALE2_COUNT2_EVT_MASK;
+ evtsel |= hwc->config_base << XSCALE2_COUNT2_EVT_SHFT;
+ break;
+ case XSCALE_COUNTER3:
+ ien |= XSCALE2_COUNT3_INT_EN;
+ evtsel &= ~XSCALE2_COUNT3_EVT_MASK;
+ evtsel |= hwc->config_base << XSCALE2_COUNT3_EVT_SHFT;
+ break;
+ default:
+ WARN_ONCE(1, "invalid counter number (%d)\n", idx);
+ return;
+ }
+
+ spin_lock_irqsave(&pmu_lock, flags);
+ xscale2pmu_write_event_select(evtsel);
+ xscale2pmu_write_int_enable(ien);
+ spin_unlock_irqrestore(&pmu_lock, flags);
+}
+
+static void
+xscale2pmu_disable_event(struct hw_perf_event *hwc, int idx)
+{
+ unsigned long flags, ien, evtsel;
+
+ ien = xscale2pmu_read_int_enable();
+ evtsel = xscale2pmu_read_event_select();
+
+ switch (idx) {
+ case XSCALE_CYCLE_COUNTER:
+ ien &= ~XSCALE2_CCOUNT_INT_EN;
+ break;
+ case XSCALE_COUNTER0:
+ ien &= ~XSCALE2_COUNT0_INT_EN;
+ evtsel &= ~XSCALE2_COUNT0_EVT_MASK;
+ evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT0_EVT_SHFT;
+ break;
+ case XSCALE_COUNTER1:
+ ien &= ~XSCALE2_COUNT1_INT_EN;
+ evtsel &= ~XSCALE2_COUNT1_EVT_MASK;
+ evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT1_EVT_SHFT;
+ break;
+ case XSCALE_COUNTER2:
+ ien &= ~XSCALE2_COUNT2_INT_EN;
+ evtsel &= ~XSCALE2_COUNT2_EVT_MASK;
+ evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT2_EVT_SHFT;
+ break;
+ case XSCALE_COUNTER3:
+ ien &= ~XSCALE2_COUNT3_INT_EN;
+ evtsel &= ~XSCALE2_COUNT3_EVT_MASK;
+ evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT3_EVT_SHFT;
+ break;
+ default:
+ WARN_ONCE(1, "invalid counter number (%d)\n", idx);
+ return;
+ }
+
+ spin_lock_irqsave(&pmu_lock, flags);
+ xscale2pmu_write_event_select(evtsel);
+ xscale2pmu_write_int_enable(ien);
+ spin_unlock_irqrestore(&pmu_lock, flags);
+}
+
+static int
+xscale2pmu_get_event_idx(struct cpu_hw_events *cpuc,
+ struct hw_perf_event *event)
+{
+ int idx = xscale1pmu_get_event_idx(cpuc, event);
+ if (idx >= 0)
+ goto out;
+
+ if (!test_and_set_bit(XSCALE_COUNTER3, cpuc->used_mask))
+ idx = XSCALE_COUNTER3;
+ else if (!test_and_set_bit(XSCALE_COUNTER2, cpuc->used_mask))
+ idx = XSCALE_COUNTER2;
+out:
+ return idx;
+}
+
+static void
+xscale2pmu_start(void)
+{
+ unsigned long flags, val;
+
+ spin_lock_irqsave(&pmu_lock, flags);
+ val = xscale2pmu_read_pmnc() & ~XSCALE_PMU_CNT64;
+ val |= XSCALE_PMU_ENABLE;
+ xscale2pmu_write_pmnc(val);
+ spin_unlock_irqrestore(&pmu_lock, flags);
+}
+
+static void
+xscale2pmu_stop(void)
+{
+ unsigned long flags, val;
+
+ spin_lock_irqsave(&pmu_lock, flags);
+ val = xscale2pmu_read_pmnc();
+ val &= ~XSCALE_PMU_ENABLE;
+ xscale2pmu_write_pmnc(val);
+ spin_unlock_irqrestore(&pmu_lock, flags);
+}
+
+static inline u32
+xscale2pmu_read_counter(int counter)
+{
+ u32 val = 0;
+
+ switch (counter) {
+ case XSCALE_CYCLE_COUNTER:
+ asm volatile("mrc p14, 0, %0, c1, c1, 0" : "=r" (val));
+ break;
+ case XSCALE_COUNTER0:
+ asm volatile("mrc p14, 0, %0, c0, c2, 0" : "=r" (val));
+ break;
+ case XSCALE_COUNTER1:
+ asm volatile("mrc p14, 0, %0, c1, c2, 0" : "=r" (val));
+ break;
+ case XSCALE_COUNTER2:
+ asm volatile("mrc p14, 0, %0, c2, c2, 0" : "=r" (val));
+ break;
+ case XSCALE_COUNTER3:
+ asm volatile("mrc p14, 0, %0, c3, c2, 0" : "=r" (val));
+ break;
+ }
+
+ return val;
+}
+
+static inline void
+xscale2pmu_write_counter(int counter, u32 val)
+{
+ switch (counter) {
+ case XSCALE_CYCLE_COUNTER:
+ asm volatile("mcr p14, 0, %0, c1, c1, 0" : : "r" (val));
+ break;
+ case XSCALE_COUNTER0:
+ asm volatile("mcr p14, 0, %0, c0, c2, 0" : : "r" (val));
+ break;
+ case XSCALE_COUNTER1:
+ asm volatile("mcr p14, 0, %0, c1, c2, 0" : : "r" (val));
+ break;
+ case XSCALE_COUNTER2:
+ asm volatile("mcr p14, 0, %0, c2, c2, 0" : : "r" (val));
+ break;
+ case XSCALE_COUNTER3:
+ asm volatile("mcr p14, 0, %0, c3, c2, 0" : : "r" (val));
+ break;
+ }
+}
+
+static const struct arm_pmu xscale2pmu = {
+ .id = ARM_PERF_PMU_ID_XSCALE2,
+ .name = "xscale2",
+ .handle_irq = xscale2pmu_handle_irq,
+ .enable = xscale2pmu_enable_event,
+ .disable = xscale2pmu_disable_event,
+ .read_counter = xscale2pmu_read_counter,
+ .write_counter = xscale2pmu_write_counter,
+ .get_event_idx = xscale2pmu_get_event_idx,
+ .start = xscale2pmu_start,
+ .stop = xscale2pmu_stop,
+ .cache_map = &xscale_perf_cache_map,
+ .event_map = &xscale_perf_map,
+ .raw_event_mask = 0xFF,
+ .num_events = 5,
+ .max_period = (1LLU << 32) - 1,
+};
+
+const struct arm_pmu *__init xscale2pmu_init(void)
+{
+ return &xscale2pmu;
+}
+#else
+const struct arm_pmu *__init xscale1pmu_init(void)
+{
+ return NULL;
+}
+
+const struct arm_pmu *__init xscale2pmu_init(void)
+{
+ return NULL;
+}
+#endif /* CONFIG_CPU_XSCALE */
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff