mirror of https://gitee.com/openkylin/linux.git
776 lines
20 KiB
C
776 lines
20 KiB
C
/*
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* ARMv5 [xscale] Performance counter handling code.
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*
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* Copyright (C) 2010, ARM Ltd., Will Deacon <will.deacon@arm.com>
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*
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* Based on the previous xscale OProfile code.
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*
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* There are two variants of the xscale PMU that we support:
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* - xscale1pmu: 2 event counters and a cycle counter
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* - xscale2pmu: 4 event counters and a cycle counter
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* The two variants share event definitions, but have different
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* PMU structures.
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*/
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#ifdef CONFIG_CPU_XSCALE
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#include <asm/cputype.h>
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#include <asm/irq_regs.h>
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#include <asm/pmu.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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enum xscale_perf_types {
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XSCALE_PERFCTR_ICACHE_MISS = 0x00,
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XSCALE_PERFCTR_ICACHE_NO_DELIVER = 0x01,
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XSCALE_PERFCTR_DATA_STALL = 0x02,
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XSCALE_PERFCTR_ITLB_MISS = 0x03,
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XSCALE_PERFCTR_DTLB_MISS = 0x04,
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XSCALE_PERFCTR_BRANCH = 0x05,
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XSCALE_PERFCTR_BRANCH_MISS = 0x06,
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XSCALE_PERFCTR_INSTRUCTION = 0x07,
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XSCALE_PERFCTR_DCACHE_FULL_STALL = 0x08,
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XSCALE_PERFCTR_DCACHE_FULL_STALL_CONTIG = 0x09,
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XSCALE_PERFCTR_DCACHE_ACCESS = 0x0A,
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XSCALE_PERFCTR_DCACHE_MISS = 0x0B,
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XSCALE_PERFCTR_DCACHE_WRITE_BACK = 0x0C,
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XSCALE_PERFCTR_PC_CHANGED = 0x0D,
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XSCALE_PERFCTR_BCU_REQUEST = 0x10,
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XSCALE_PERFCTR_BCU_FULL = 0x11,
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XSCALE_PERFCTR_BCU_DRAIN = 0x12,
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XSCALE_PERFCTR_BCU_ECC_NO_ELOG = 0x14,
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XSCALE_PERFCTR_BCU_1_BIT_ERR = 0x15,
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XSCALE_PERFCTR_RMW = 0x16,
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/* XSCALE_PERFCTR_CCNT is not hardware defined */
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XSCALE_PERFCTR_CCNT = 0xFE,
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XSCALE_PERFCTR_UNUSED = 0xFF,
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};
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enum xscale_counters {
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XSCALE_CYCLE_COUNTER = 0,
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XSCALE_COUNTER0,
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XSCALE_COUNTER1,
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XSCALE_COUNTER2,
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XSCALE_COUNTER3,
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};
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static const unsigned xscale_perf_map[PERF_COUNT_HW_MAX] = {
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PERF_MAP_ALL_UNSUPPORTED,
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[PERF_COUNT_HW_CPU_CYCLES] = XSCALE_PERFCTR_CCNT,
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[PERF_COUNT_HW_INSTRUCTIONS] = XSCALE_PERFCTR_INSTRUCTION,
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[PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = XSCALE_PERFCTR_BRANCH,
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[PERF_COUNT_HW_BRANCH_MISSES] = XSCALE_PERFCTR_BRANCH_MISS,
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[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = XSCALE_PERFCTR_ICACHE_NO_DELIVER,
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};
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static const unsigned xscale_perf_cache_map[PERF_COUNT_HW_CACHE_MAX]
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[PERF_COUNT_HW_CACHE_OP_MAX]
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[PERF_COUNT_HW_CACHE_RESULT_MAX] = {
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PERF_CACHE_MAP_ALL_UNSUPPORTED,
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[C(L1D)][C(OP_READ)][C(RESULT_ACCESS)] = XSCALE_PERFCTR_DCACHE_ACCESS,
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[C(L1D)][C(OP_READ)][C(RESULT_MISS)] = XSCALE_PERFCTR_DCACHE_MISS,
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[C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = XSCALE_PERFCTR_DCACHE_ACCESS,
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[C(L1D)][C(OP_WRITE)][C(RESULT_MISS)] = XSCALE_PERFCTR_DCACHE_MISS,
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[C(L1I)][C(OP_READ)][C(RESULT_MISS)] = XSCALE_PERFCTR_ICACHE_MISS,
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[C(DTLB)][C(OP_READ)][C(RESULT_MISS)] = XSCALE_PERFCTR_DTLB_MISS,
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[C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)] = XSCALE_PERFCTR_DTLB_MISS,
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[C(ITLB)][C(OP_READ)][C(RESULT_MISS)] = XSCALE_PERFCTR_ITLB_MISS,
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[C(ITLB)][C(OP_WRITE)][C(RESULT_MISS)] = XSCALE_PERFCTR_ITLB_MISS,
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};
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#define XSCALE_PMU_ENABLE 0x001
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#define XSCALE_PMN_RESET 0x002
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#define XSCALE_CCNT_RESET 0x004
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#define XSCALE_PMU_RESET (CCNT_RESET | PMN_RESET)
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#define XSCALE_PMU_CNT64 0x008
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#define XSCALE1_OVERFLOWED_MASK 0x700
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#define XSCALE1_CCOUNT_OVERFLOW 0x400
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#define XSCALE1_COUNT0_OVERFLOW 0x100
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#define XSCALE1_COUNT1_OVERFLOW 0x200
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#define XSCALE1_CCOUNT_INT_EN 0x040
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#define XSCALE1_COUNT0_INT_EN 0x010
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#define XSCALE1_COUNT1_INT_EN 0x020
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#define XSCALE1_COUNT0_EVT_SHFT 12
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#define XSCALE1_COUNT0_EVT_MASK (0xff << XSCALE1_COUNT0_EVT_SHFT)
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#define XSCALE1_COUNT1_EVT_SHFT 20
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#define XSCALE1_COUNT1_EVT_MASK (0xff << XSCALE1_COUNT1_EVT_SHFT)
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static inline u32
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xscale1pmu_read_pmnc(void)
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{
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u32 val;
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asm volatile("mrc p14, 0, %0, c0, c0, 0" : "=r" (val));
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return val;
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}
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static inline void
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xscale1pmu_write_pmnc(u32 val)
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{
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/* upper 4bits and 7, 11 are write-as-0 */
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val &= 0xffff77f;
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asm volatile("mcr p14, 0, %0, c0, c0, 0" : : "r" (val));
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}
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static inline int
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xscale1_pmnc_counter_has_overflowed(unsigned long pmnc,
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enum xscale_counters counter)
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{
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int ret = 0;
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switch (counter) {
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case XSCALE_CYCLE_COUNTER:
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ret = pmnc & XSCALE1_CCOUNT_OVERFLOW;
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break;
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case XSCALE_COUNTER0:
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ret = pmnc & XSCALE1_COUNT0_OVERFLOW;
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break;
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case XSCALE_COUNTER1:
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ret = pmnc & XSCALE1_COUNT1_OVERFLOW;
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break;
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default:
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WARN_ONCE(1, "invalid counter number (%d)\n", counter);
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}
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return ret;
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}
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static irqreturn_t
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xscale1pmu_handle_irq(int irq_num, void *dev)
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{
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unsigned long pmnc;
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struct perf_sample_data data;
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struct arm_pmu *cpu_pmu = (struct arm_pmu *)dev;
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struct pmu_hw_events *cpuc = this_cpu_ptr(cpu_pmu->hw_events);
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struct pt_regs *regs;
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int idx;
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/*
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* NOTE: there's an A stepping erratum that states if an overflow
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* bit already exists and another occurs, the previous
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* Overflow bit gets cleared. There's no workaround.
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* Fixed in B stepping or later.
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*/
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pmnc = xscale1pmu_read_pmnc();
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/*
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* Write the value back to clear the overflow flags. Overflow
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* flags remain in pmnc for use below. We also disable the PMU
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* while we process the interrupt.
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*/
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xscale1pmu_write_pmnc(pmnc & ~XSCALE_PMU_ENABLE);
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if (!(pmnc & XSCALE1_OVERFLOWED_MASK))
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return IRQ_NONE;
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regs = get_irq_regs();
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for (idx = 0; idx < cpu_pmu->num_events; ++idx) {
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struct perf_event *event = cpuc->events[idx];
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struct hw_perf_event *hwc;
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if (!event)
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continue;
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if (!xscale1_pmnc_counter_has_overflowed(pmnc, idx))
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continue;
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hwc = &event->hw;
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armpmu_event_update(event);
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perf_sample_data_init(&data, 0, hwc->last_period);
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if (!armpmu_event_set_period(event))
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continue;
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if (perf_event_overflow(event, &data, regs))
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cpu_pmu->disable(event);
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}
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irq_work_run();
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/*
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* Re-enable the PMU.
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*/
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pmnc = xscale1pmu_read_pmnc() | XSCALE_PMU_ENABLE;
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xscale1pmu_write_pmnc(pmnc);
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return IRQ_HANDLED;
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}
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static void xscale1pmu_enable_event(struct perf_event *event)
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{
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unsigned long val, mask, evt, flags;
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struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
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struct hw_perf_event *hwc = &event->hw;
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struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
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int idx = hwc->idx;
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switch (idx) {
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case XSCALE_CYCLE_COUNTER:
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mask = 0;
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evt = XSCALE1_CCOUNT_INT_EN;
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break;
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case XSCALE_COUNTER0:
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mask = XSCALE1_COUNT0_EVT_MASK;
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evt = (hwc->config_base << XSCALE1_COUNT0_EVT_SHFT) |
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XSCALE1_COUNT0_INT_EN;
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break;
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case XSCALE_COUNTER1:
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mask = XSCALE1_COUNT1_EVT_MASK;
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evt = (hwc->config_base << XSCALE1_COUNT1_EVT_SHFT) |
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XSCALE1_COUNT1_INT_EN;
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break;
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default:
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WARN_ONCE(1, "invalid counter number (%d)\n", idx);
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return;
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}
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raw_spin_lock_irqsave(&events->pmu_lock, flags);
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val = xscale1pmu_read_pmnc();
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val &= ~mask;
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val |= evt;
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xscale1pmu_write_pmnc(val);
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raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
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}
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static void xscale1pmu_disable_event(struct perf_event *event)
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{
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unsigned long val, mask, evt, flags;
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struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
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struct hw_perf_event *hwc = &event->hw;
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struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
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int idx = hwc->idx;
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switch (idx) {
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case XSCALE_CYCLE_COUNTER:
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mask = XSCALE1_CCOUNT_INT_EN;
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evt = 0;
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break;
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case XSCALE_COUNTER0:
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mask = XSCALE1_COUNT0_INT_EN | XSCALE1_COUNT0_EVT_MASK;
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evt = XSCALE_PERFCTR_UNUSED << XSCALE1_COUNT0_EVT_SHFT;
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break;
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case XSCALE_COUNTER1:
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mask = XSCALE1_COUNT1_INT_EN | XSCALE1_COUNT1_EVT_MASK;
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evt = XSCALE_PERFCTR_UNUSED << XSCALE1_COUNT1_EVT_SHFT;
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break;
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default:
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WARN_ONCE(1, "invalid counter number (%d)\n", idx);
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return;
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}
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raw_spin_lock_irqsave(&events->pmu_lock, flags);
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val = xscale1pmu_read_pmnc();
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val &= ~mask;
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val |= evt;
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xscale1pmu_write_pmnc(val);
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raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
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}
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static int
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xscale1pmu_get_event_idx(struct pmu_hw_events *cpuc,
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struct perf_event *event)
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{
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struct hw_perf_event *hwc = &event->hw;
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if (XSCALE_PERFCTR_CCNT == hwc->config_base) {
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if (test_and_set_bit(XSCALE_CYCLE_COUNTER, cpuc->used_mask))
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return -EAGAIN;
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return XSCALE_CYCLE_COUNTER;
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} else {
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if (!test_and_set_bit(XSCALE_COUNTER1, cpuc->used_mask))
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return XSCALE_COUNTER1;
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if (!test_and_set_bit(XSCALE_COUNTER0, cpuc->used_mask))
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return XSCALE_COUNTER0;
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return -EAGAIN;
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}
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}
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static void xscale1pmu_start(struct arm_pmu *cpu_pmu)
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{
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unsigned long flags, val;
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struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
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raw_spin_lock_irqsave(&events->pmu_lock, flags);
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val = xscale1pmu_read_pmnc();
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val |= XSCALE_PMU_ENABLE;
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xscale1pmu_write_pmnc(val);
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raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
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}
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static void xscale1pmu_stop(struct arm_pmu *cpu_pmu)
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{
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unsigned long flags, val;
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struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
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raw_spin_lock_irqsave(&events->pmu_lock, flags);
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val = xscale1pmu_read_pmnc();
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val &= ~XSCALE_PMU_ENABLE;
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xscale1pmu_write_pmnc(val);
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raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
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}
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static inline u32 xscale1pmu_read_counter(struct perf_event *event)
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{
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struct hw_perf_event *hwc = &event->hw;
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int counter = hwc->idx;
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u32 val = 0;
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switch (counter) {
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case XSCALE_CYCLE_COUNTER:
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asm volatile("mrc p14, 0, %0, c1, c0, 0" : "=r" (val));
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break;
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case XSCALE_COUNTER0:
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asm volatile("mrc p14, 0, %0, c2, c0, 0" : "=r" (val));
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break;
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case XSCALE_COUNTER1:
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asm volatile("mrc p14, 0, %0, c3, c0, 0" : "=r" (val));
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break;
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}
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return val;
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}
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static inline void xscale1pmu_write_counter(struct perf_event *event, u32 val)
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{
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struct hw_perf_event *hwc = &event->hw;
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int counter = hwc->idx;
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switch (counter) {
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case XSCALE_CYCLE_COUNTER:
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asm volatile("mcr p14, 0, %0, c1, c0, 0" : : "r" (val));
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break;
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case XSCALE_COUNTER0:
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asm volatile("mcr p14, 0, %0, c2, c0, 0" : : "r" (val));
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break;
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case XSCALE_COUNTER1:
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asm volatile("mcr p14, 0, %0, c3, c0, 0" : : "r" (val));
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break;
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}
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}
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static int xscale_map_event(struct perf_event *event)
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{
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return armpmu_map_event(event, &xscale_perf_map,
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&xscale_perf_cache_map, 0xFF);
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}
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static int xscale1pmu_init(struct arm_pmu *cpu_pmu)
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{
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cpu_pmu->name = "armv5_xscale1";
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cpu_pmu->handle_irq = xscale1pmu_handle_irq;
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cpu_pmu->enable = xscale1pmu_enable_event;
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cpu_pmu->disable = xscale1pmu_disable_event;
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cpu_pmu->read_counter = xscale1pmu_read_counter;
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cpu_pmu->write_counter = xscale1pmu_write_counter;
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cpu_pmu->get_event_idx = xscale1pmu_get_event_idx;
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cpu_pmu->start = xscale1pmu_start;
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cpu_pmu->stop = xscale1pmu_stop;
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cpu_pmu->map_event = xscale_map_event;
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cpu_pmu->num_events = 3;
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cpu_pmu->max_period = (1LLU << 32) - 1;
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return 0;
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}
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#define XSCALE2_OVERFLOWED_MASK 0x01f
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#define XSCALE2_CCOUNT_OVERFLOW 0x001
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#define XSCALE2_COUNT0_OVERFLOW 0x002
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#define XSCALE2_COUNT1_OVERFLOW 0x004
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#define XSCALE2_COUNT2_OVERFLOW 0x008
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#define XSCALE2_COUNT3_OVERFLOW 0x010
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#define XSCALE2_CCOUNT_INT_EN 0x001
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#define XSCALE2_COUNT0_INT_EN 0x002
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#define XSCALE2_COUNT1_INT_EN 0x004
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#define XSCALE2_COUNT2_INT_EN 0x008
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#define XSCALE2_COUNT3_INT_EN 0x010
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#define XSCALE2_COUNT0_EVT_SHFT 0
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#define XSCALE2_COUNT0_EVT_MASK (0xff << XSCALE2_COUNT0_EVT_SHFT)
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#define XSCALE2_COUNT1_EVT_SHFT 8
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#define XSCALE2_COUNT1_EVT_MASK (0xff << XSCALE2_COUNT1_EVT_SHFT)
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#define XSCALE2_COUNT2_EVT_SHFT 16
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#define XSCALE2_COUNT2_EVT_MASK (0xff << XSCALE2_COUNT2_EVT_SHFT)
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#define XSCALE2_COUNT3_EVT_SHFT 24
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#define XSCALE2_COUNT3_EVT_MASK (0xff << XSCALE2_COUNT3_EVT_SHFT)
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static inline u32
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xscale2pmu_read_pmnc(void)
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{
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u32 val;
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asm volatile("mrc p14, 0, %0, c0, c1, 0" : "=r" (val));
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/* bits 1-2 and 4-23 are read-unpredictable */
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return val & 0xff000009;
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}
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static inline void
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xscale2pmu_write_pmnc(u32 val)
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{
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/* bits 4-23 are write-as-0, 24-31 are write ignored */
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val &= 0xf;
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asm volatile("mcr p14, 0, %0, c0, c1, 0" : : "r" (val));
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}
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static inline u32
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xscale2pmu_read_overflow_flags(void)
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{
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u32 val;
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asm volatile("mrc p14, 0, %0, c5, c1, 0" : "=r" (val));
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return val;
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}
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static inline void
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xscale2pmu_write_overflow_flags(u32 val)
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{
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asm volatile("mcr p14, 0, %0, c5, c1, 0" : : "r" (val));
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}
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static inline u32
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xscale2pmu_read_event_select(void)
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{
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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 arm_pmu *cpu_pmu = (struct arm_pmu *)dev;
|
|
struct pmu_hw_events *cpuc = this_cpu_ptr(cpu_pmu->hw_events);
|
|
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();
|
|
|
|
for (idx = 0; idx < cpu_pmu->num_events; ++idx) {
|
|
struct perf_event *event = cpuc->events[idx];
|
|
struct hw_perf_event *hwc;
|
|
|
|
if (!event)
|
|
continue;
|
|
|
|
if (!xscale2_pmnc_counter_has_overflowed(of_flags, idx))
|
|
continue;
|
|
|
|
hwc = &event->hw;
|
|
armpmu_event_update(event);
|
|
perf_sample_data_init(&data, 0, hwc->last_period);
|
|
if (!armpmu_event_set_period(event))
|
|
continue;
|
|
|
|
if (perf_event_overflow(event, &data, regs))
|
|
cpu_pmu->disable(event);
|
|
}
|
|
|
|
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 perf_event *event)
|
|
{
|
|
unsigned long flags, ien, evtsel;
|
|
struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
|
|
struct hw_perf_event *hwc = &event->hw;
|
|
struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
|
|
int idx = hwc->idx;
|
|
|
|
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;
|
|
}
|
|
|
|
raw_spin_lock_irqsave(&events->pmu_lock, flags);
|
|
xscale2pmu_write_event_select(evtsel);
|
|
xscale2pmu_write_int_enable(ien);
|
|
raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
|
|
}
|
|
|
|
static void xscale2pmu_disable_event(struct perf_event *event)
|
|
{
|
|
unsigned long flags, ien, evtsel, of_flags;
|
|
struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
|
|
struct hw_perf_event *hwc = &event->hw;
|
|
struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
|
|
int idx = hwc->idx;
|
|
|
|
ien = xscale2pmu_read_int_enable();
|
|
evtsel = xscale2pmu_read_event_select();
|
|
|
|
switch (idx) {
|
|
case XSCALE_CYCLE_COUNTER:
|
|
ien &= ~XSCALE2_CCOUNT_INT_EN;
|
|
of_flags = XSCALE2_CCOUNT_OVERFLOW;
|
|
break;
|
|
case XSCALE_COUNTER0:
|
|
ien &= ~XSCALE2_COUNT0_INT_EN;
|
|
evtsel &= ~XSCALE2_COUNT0_EVT_MASK;
|
|
evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT0_EVT_SHFT;
|
|
of_flags = XSCALE2_COUNT0_OVERFLOW;
|
|
break;
|
|
case XSCALE_COUNTER1:
|
|
ien &= ~XSCALE2_COUNT1_INT_EN;
|
|
evtsel &= ~XSCALE2_COUNT1_EVT_MASK;
|
|
evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT1_EVT_SHFT;
|
|
of_flags = XSCALE2_COUNT1_OVERFLOW;
|
|
break;
|
|
case XSCALE_COUNTER2:
|
|
ien &= ~XSCALE2_COUNT2_INT_EN;
|
|
evtsel &= ~XSCALE2_COUNT2_EVT_MASK;
|
|
evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT2_EVT_SHFT;
|
|
of_flags = XSCALE2_COUNT2_OVERFLOW;
|
|
break;
|
|
case XSCALE_COUNTER3:
|
|
ien &= ~XSCALE2_COUNT3_INT_EN;
|
|
evtsel &= ~XSCALE2_COUNT3_EVT_MASK;
|
|
evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT3_EVT_SHFT;
|
|
of_flags = XSCALE2_COUNT3_OVERFLOW;
|
|
break;
|
|
default:
|
|
WARN_ONCE(1, "invalid counter number (%d)\n", idx);
|
|
return;
|
|
}
|
|
|
|
raw_spin_lock_irqsave(&events->pmu_lock, flags);
|
|
xscale2pmu_write_event_select(evtsel);
|
|
xscale2pmu_write_int_enable(ien);
|
|
xscale2pmu_write_overflow_flags(of_flags);
|
|
raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
|
|
}
|
|
|
|
static int
|
|
xscale2pmu_get_event_idx(struct pmu_hw_events *cpuc,
|
|
struct 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(struct arm_pmu *cpu_pmu)
|
|
{
|
|
unsigned long flags, val;
|
|
struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
|
|
|
|
raw_spin_lock_irqsave(&events->pmu_lock, flags);
|
|
val = xscale2pmu_read_pmnc() & ~XSCALE_PMU_CNT64;
|
|
val |= XSCALE_PMU_ENABLE;
|
|
xscale2pmu_write_pmnc(val);
|
|
raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
|
|
}
|
|
|
|
static void xscale2pmu_stop(struct arm_pmu *cpu_pmu)
|
|
{
|
|
unsigned long flags, val;
|
|
struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
|
|
|
|
raw_spin_lock_irqsave(&events->pmu_lock, flags);
|
|
val = xscale2pmu_read_pmnc();
|
|
val &= ~XSCALE_PMU_ENABLE;
|
|
xscale2pmu_write_pmnc(val);
|
|
raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
|
|
}
|
|
|
|
static inline u32 xscale2pmu_read_counter(struct perf_event *event)
|
|
{
|
|
struct hw_perf_event *hwc = &event->hw;
|
|
int counter = hwc->idx;
|
|
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(struct perf_event *event, u32 val)
|
|
{
|
|
struct hw_perf_event *hwc = &event->hw;
|
|
int counter = hwc->idx;
|
|
|
|
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 int xscale2pmu_init(struct arm_pmu *cpu_pmu)
|
|
{
|
|
cpu_pmu->name = "armv5_xscale2";
|
|
cpu_pmu->handle_irq = xscale2pmu_handle_irq;
|
|
cpu_pmu->enable = xscale2pmu_enable_event;
|
|
cpu_pmu->disable = xscale2pmu_disable_event;
|
|
cpu_pmu->read_counter = xscale2pmu_read_counter;
|
|
cpu_pmu->write_counter = xscale2pmu_write_counter;
|
|
cpu_pmu->get_event_idx = xscale2pmu_get_event_idx;
|
|
cpu_pmu->start = xscale2pmu_start;
|
|
cpu_pmu->stop = xscale2pmu_stop;
|
|
cpu_pmu->map_event = xscale_map_event;
|
|
cpu_pmu->num_events = 5;
|
|
cpu_pmu->max_period = (1LLU << 32) - 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct pmu_probe_info xscale_pmu_probe_table[] = {
|
|
XSCALE_PMU_PROBE(ARM_CPU_XSCALE_ARCH_V1, xscale1pmu_init),
|
|
XSCALE_PMU_PROBE(ARM_CPU_XSCALE_ARCH_V2, xscale2pmu_init),
|
|
{ /* sentinel value */ }
|
|
};
|
|
|
|
static int xscale_pmu_device_probe(struct platform_device *pdev)
|
|
{
|
|
return arm_pmu_device_probe(pdev, NULL, xscale_pmu_probe_table);
|
|
}
|
|
|
|
static struct platform_driver xscale_pmu_driver = {
|
|
.driver = {
|
|
.name = "xscale-pmu",
|
|
},
|
|
.probe = xscale_pmu_device_probe,
|
|
};
|
|
|
|
static int __init register_xscale_pmu_driver(void)
|
|
{
|
|
return platform_driver_register(&xscale_pmu_driver);
|
|
}
|
|
device_initcall(register_xscale_pmu_driver);
|
|
#endif /* CONFIG_CPU_XSCALE */
|