| /* |
| * 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 |
| |
| static struct arm_pmu armv7pmu; |
| |
| /* |
| * Common ARMv7 event types |
| * |
| * Note: An implementation may not be able to count all of these events |
| * but the encodings are considered to be `reserved' in the case that |
| * they are not available. |
| */ |
| enum armv7_perf_types { |
| ARMV7_PERFCTR_PMNC_SW_INCR = 0x00, |
| ARMV7_PERFCTR_L1_ICACHE_REFILL = 0x01, |
| ARMV7_PERFCTR_ITLB_REFILL = 0x02, |
| ARMV7_PERFCTR_L1_DCACHE_REFILL = 0x03, |
| ARMV7_PERFCTR_L1_DCACHE_ACCESS = 0x04, |
| ARMV7_PERFCTR_DTLB_REFILL = 0x05, |
| ARMV7_PERFCTR_MEM_READ = 0x06, |
| ARMV7_PERFCTR_MEM_WRITE = 0x07, |
| ARMV7_PERFCTR_INSTR_EXECUTED = 0x08, |
| 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 (taken) branch instructions, |
| * - instructions that explicitly write the PC, |
| * - exception generating instructions. |
| */ |
| ARMV7_PERFCTR_PC_WRITE = 0x0C, |
| ARMV7_PERFCTR_PC_IMM_BRANCH = 0x0D, |
| ARMV7_PERFCTR_PC_PROC_RETURN = 0x0E, |
| ARMV7_PERFCTR_MEM_UNALIGNED_ACCESS = 0x0F, |
| ARMV7_PERFCTR_PC_BRANCH_MIS_PRED = 0x10, |
| ARMV7_PERFCTR_CLOCK_CYCLES = 0x11, |
| ARMV7_PERFCTR_PC_BRANCH_PRED = 0x12, |
| |
| /* These events are defined by the PMUv2 supplement (ARM DDI 0457A). */ |
| ARMV7_PERFCTR_MEM_ACCESS = 0x13, |
| ARMV7_PERFCTR_L1_ICACHE_ACCESS = 0x14, |
| ARMV7_PERFCTR_L1_DCACHE_WB = 0x15, |
| ARMV7_PERFCTR_L2_CACHE_ACCESS = 0x16, |
| ARMV7_PERFCTR_L2_CACHE_REFILL = 0x17, |
| ARMV7_PERFCTR_L2_CACHE_WB = 0x18, |
| ARMV7_PERFCTR_BUS_ACCESS = 0x19, |
| ARMV7_PERFCTR_MEM_ERROR = 0x1A, |
| ARMV7_PERFCTR_INSTR_SPEC = 0x1B, |
| ARMV7_PERFCTR_TTBR_WRITE = 0x1C, |
| ARMV7_PERFCTR_BUS_CYCLES = 0x1D, |
| |
| ARMV7_PERFCTR_CPU_CYCLES = 0xFF |
| }; |
| |
| /* ARMv7 Cortex-A8 specific event types */ |
| enum armv7_a8_perf_types { |
| ARMV7_A8_PERFCTR_L2_CACHE_ACCESS = 0x43, |
| ARMV7_A8_PERFCTR_L2_CACHE_REFILL = 0x44, |
| ARMV7_A8_PERFCTR_L1_ICACHE_ACCESS = 0x50, |
| ARMV7_A8_PERFCTR_STALL_ISIDE = 0x56, |
| }; |
| |
| /* ARMv7 Cortex-A9 specific event types */ |
| enum armv7_a9_perf_types { |
| ARMV7_A9_PERFCTR_INSTR_CORE_RENAME = 0x68, |
| ARMV7_A9_PERFCTR_STALL_ICACHE = 0x60, |
| ARMV7_A9_PERFCTR_STALL_DISPATCH = 0x66, |
| }; |
| |
| /* ARMv7 Cortex-A5 specific event types */ |
| enum armv7_a5_perf_types { |
| ARMV7_A5_PERFCTR_PREFETCH_LINEFILL = 0xc2, |
| ARMV7_A5_PERFCTR_PREFETCH_LINEFILL_DROP = 0xc3, |
| }; |
| |
| /* ARMv7 Cortex-A15 specific event types */ |
| enum armv7_a15_perf_types { |
| ARMV7_A15_PERFCTR_L1_DCACHE_ACCESS_READ = 0x40, |
| ARMV7_A15_PERFCTR_L1_DCACHE_ACCESS_WRITE = 0x41, |
| ARMV7_A15_PERFCTR_L1_DCACHE_REFILL_READ = 0x42, |
| ARMV7_A15_PERFCTR_L1_DCACHE_REFILL_WRITE = 0x43, |
| |
| ARMV7_A15_PERFCTR_DTLB_REFILL_L1_READ = 0x4C, |
| ARMV7_A15_PERFCTR_DTLB_REFILL_L1_WRITE = 0x4D, |
| |
| ARMV7_A15_PERFCTR_L2_CACHE_ACCESS_READ = 0x50, |
| ARMV7_A15_PERFCTR_L2_CACHE_ACCESS_WRITE = 0x51, |
| ARMV7_A15_PERFCTR_L2_CACHE_REFILL_READ = 0x52, |
| ARMV7_A15_PERFCTR_L2_CACHE_REFILL_WRITE = 0x53, |
| |
| ARMV7_A15_PERFCTR_PC_WRITE_SPEC = 0x76, |
| }; |
| |
| /* |
| * 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] = ARMV7_PERFCTR_L1_DCACHE_ACCESS, |
| [PERF_COUNT_HW_CACHE_MISSES] = ARMV7_PERFCTR_L1_DCACHE_REFILL, |
| [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] = HW_OP_UNSUPPORTED, |
| [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = ARMV7_A8_PERFCTR_STALL_ISIDE, |
| [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = HW_OP_UNSUPPORTED, |
| }; |
| |
| 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_L1_DCACHE_ACCESS, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL, |
| }, |
| [C(OP_WRITE)] = { |
| [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_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_A8_PERFCTR_L1_ICACHE_ACCESS, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_ICACHE_REFILL, |
| }, |
| [C(OP_WRITE)] = { |
| [C(RESULT_ACCESS)] = ARMV7_A8_PERFCTR_L1_ICACHE_ACCESS, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_ICACHE_REFILL, |
| }, |
| [C(OP_PREFETCH)] = { |
| [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, |
| [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, |
| }, |
| }, |
| [C(LL)] = { |
| [C(OP_READ)] = { |
| [C(RESULT_ACCESS)] = ARMV7_A8_PERFCTR_L2_CACHE_ACCESS, |
| [C(RESULT_MISS)] = ARMV7_A8_PERFCTR_L2_CACHE_REFILL, |
| }, |
| [C(OP_WRITE)] = { |
| [C(RESULT_ACCESS)] = ARMV7_A8_PERFCTR_L2_CACHE_ACCESS, |
| [C(RESULT_MISS)] = ARMV7_A8_PERFCTR_L2_CACHE_REFILL, |
| }, |
| [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)] = 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_REFILL, |
| }, |
| [C(OP_WRITE)] = { |
| [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL, |
| }, |
| [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_BRANCH_PRED, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, |
| }, |
| [C(OP_WRITE)] = { |
| [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, |
| }, |
| [C(OP_PREFETCH)] = { |
| [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, |
| [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, |
| }, |
| }, |
| [C(NODE)] = { |
| [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, |
| }, |
| }, |
| }; |
| |
| /* |
| * 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_A9_PERFCTR_INSTR_CORE_RENAME, |
| [PERF_COUNT_HW_CACHE_REFERENCES] = ARMV7_PERFCTR_L1_DCACHE_ACCESS, |
| [PERF_COUNT_HW_CACHE_MISSES] = ARMV7_PERFCTR_L1_DCACHE_REFILL, |
| [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] = HW_OP_UNSUPPORTED, |
| [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = ARMV7_A9_PERFCTR_STALL_ICACHE, |
| [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = ARMV7_A9_PERFCTR_STALL_DISPATCH, |
| }; |
| |
| 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_L1_DCACHE_ACCESS, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL, |
| }, |
| [C(OP_WRITE)] = { |
| [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_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_L1_ICACHE_REFILL, |
| }, |
| [C(OP_WRITE)] = { |
| [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_ICACHE_REFILL, |
| }, |
| [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)] = 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_REFILL, |
| }, |
| [C(OP_WRITE)] = { |
| [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL, |
| }, |
| [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_BRANCH_PRED, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, |
| }, |
| [C(OP_WRITE)] = { |
| [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, |
| }, |
| [C(OP_PREFETCH)] = { |
| [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, |
| [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, |
| }, |
| }, |
| [C(NODE)] = { |
| [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, |
| }, |
| }, |
| }; |
| |
| /* |
| * Cortex-A5 HW events mapping |
| */ |
| static const unsigned armv7_a5_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] = ARMV7_PERFCTR_L1_DCACHE_ACCESS, |
| [PERF_COUNT_HW_CACHE_MISSES] = ARMV7_PERFCTR_L1_DCACHE_REFILL, |
| [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] = HW_OP_UNSUPPORTED, |
| [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = HW_OP_UNSUPPORTED, |
| [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = HW_OP_UNSUPPORTED, |
| }; |
| |
| static const unsigned armv7_a5_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)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL, |
| }, |
| [C(OP_WRITE)] = { |
| [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL, |
| }, |
| [C(OP_PREFETCH)] = { |
| [C(RESULT_ACCESS)] = ARMV7_A5_PERFCTR_PREFETCH_LINEFILL, |
| [C(RESULT_MISS)] = ARMV7_A5_PERFCTR_PREFETCH_LINEFILL_DROP, |
| }, |
| }, |
| [C(L1I)] = { |
| [C(OP_READ)] = { |
| [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_ICACHE_ACCESS, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_ICACHE_REFILL, |
| }, |
| [C(OP_WRITE)] = { |
| [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_ICACHE_ACCESS, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_ICACHE_REFILL, |
| }, |
| /* |
| * The prefetch counters don't differentiate between the I |
| * side and the D side. |
| */ |
| [C(OP_PREFETCH)] = { |
| [C(RESULT_ACCESS)] = ARMV7_A5_PERFCTR_PREFETCH_LINEFILL, |
| [C(RESULT_MISS)] = ARMV7_A5_PERFCTR_PREFETCH_LINEFILL_DROP, |
| }, |
| }, |
| [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)] = 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_REFILL, |
| }, |
| [C(OP_WRITE)] = { |
| [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL, |
| }, |
| [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_BRANCH_PRED, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, |
| }, |
| [C(OP_WRITE)] = { |
| [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, |
| }, |
| [C(OP_PREFETCH)] = { |
| [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, |
| [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, |
| }, |
| }, |
| [C(NODE)] = { |
| [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, |
| }, |
| }, |
| }; |
| |
| /* |
| * Cortex-A15 HW events mapping |
| */ |
| static const unsigned armv7_a15_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] = ARMV7_PERFCTR_L1_DCACHE_ACCESS, |
| [PERF_COUNT_HW_CACHE_MISSES] = ARMV7_PERFCTR_L1_DCACHE_REFILL, |
| [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_A15_PERFCTR_PC_WRITE_SPEC, |
| [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, |
| [PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_BUS_CYCLES, |
| [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = HW_OP_UNSUPPORTED, |
| [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = HW_OP_UNSUPPORTED, |
| }; |
| |
| static const unsigned armv7_a15_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)] = ARMV7_A15_PERFCTR_L1_DCACHE_ACCESS_READ, |
| [C(RESULT_MISS)] = ARMV7_A15_PERFCTR_L1_DCACHE_REFILL_READ, |
| }, |
| [C(OP_WRITE)] = { |
| [C(RESULT_ACCESS)] = ARMV7_A15_PERFCTR_L1_DCACHE_ACCESS_WRITE, |
| [C(RESULT_MISS)] = ARMV7_A15_PERFCTR_L1_DCACHE_REFILL_WRITE, |
| }, |
| [C(OP_PREFETCH)] = { |
| [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, |
| [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, |
| }, |
| }, |
| [C(L1I)] = { |
| /* |
| * Not all performance counters differentiate between read |
| * and write accesses/misses so we're not always strictly |
| * correct, but it's the best we can do. Writes and reads get |
| * combined in these cases. |
| */ |
| [C(OP_READ)] = { |
| [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_ICACHE_ACCESS, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_ICACHE_REFILL, |
| }, |
| [C(OP_WRITE)] = { |
| [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_ICACHE_ACCESS, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_ICACHE_REFILL, |
| }, |
| [C(OP_PREFETCH)] = { |
| [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, |
| [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, |
| }, |
| }, |
| [C(LL)] = { |
| [C(OP_READ)] = { |
| [C(RESULT_ACCESS)] = ARMV7_A15_PERFCTR_L2_CACHE_ACCESS_READ, |
| [C(RESULT_MISS)] = ARMV7_A15_PERFCTR_L2_CACHE_REFILL_READ, |
| }, |
| [C(OP_WRITE)] = { |
| [C(RESULT_ACCESS)] = ARMV7_A15_PERFCTR_L2_CACHE_ACCESS_WRITE, |
| [C(RESULT_MISS)] = ARMV7_A15_PERFCTR_L2_CACHE_REFILL_WRITE, |
| }, |
| [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)] = ARMV7_A15_PERFCTR_DTLB_REFILL_L1_READ, |
| }, |
| [C(OP_WRITE)] = { |
| [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, |
| [C(RESULT_MISS)] = ARMV7_A15_PERFCTR_DTLB_REFILL_L1_WRITE, |
| }, |
| [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_REFILL, |
| }, |
| [C(OP_WRITE)] = { |
| [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL, |
| }, |
| [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_BRANCH_PRED, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, |
| }, |
| [C(OP_WRITE)] = { |
| [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, |
| }, |
| [C(OP_PREFETCH)] = { |
| [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, |
| [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, |
| }, |
| }, |
| [C(NODE)] = { |
| [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, |
| }, |
| }, |
| }; |
| |
| /* |
| * Cortex-A7 HW events mapping |
| */ |
| static const unsigned armv7_a7_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] = ARMV7_PERFCTR_L1_DCACHE_ACCESS, |
| [PERF_COUNT_HW_CACHE_MISSES] = ARMV7_PERFCTR_L1_DCACHE_REFILL, |
| [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_BUS_CYCLES, |
| [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = HW_OP_UNSUPPORTED, |
| [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = HW_OP_UNSUPPORTED, |
| }; |
| |
| static const unsigned armv7_a7_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_L1_DCACHE_ACCESS, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_DCACHE_REFILL, |
| }, |
| [C(OP_WRITE)] = { |
| [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_DCACHE_ACCESS, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_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_ICACHE_ACCESS, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_ICACHE_REFILL, |
| }, |
| [C(OP_WRITE)] = { |
| [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_ICACHE_ACCESS, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_ICACHE_REFILL, |
| }, |
| [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_CACHE_ACCESS, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACHE_REFILL, |
| }, |
| [C(OP_WRITE)] = { |
| [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L2_CACHE_ACCESS, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACHE_REFILL, |
| }, |
| [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)] = 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_REFILL, |
| }, |
| [C(OP_WRITE)] = { |
| [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_REFILL, |
| }, |
| [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_BRANCH_PRED, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, |
| }, |
| [C(OP_WRITE)] = { |
| [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_BRANCH_PRED, |
| [C(RESULT_MISS)] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, |
| }, |
| [C(OP_PREFETCH)] = { |
| [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, |
| [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, |
| }, |
| }, |
| [C(NODE)] = { |
| [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, |
| }, |
| }, |
| }; |
| |
| /* |
| * Perf Events' indices |
| */ |
| #define ARMV7_IDX_CYCLE_COUNTER 0 |
| #define ARMV7_IDX_COUNTER0 1 |
| #define ARMV7_IDX_COUNTER_LAST (ARMV7_IDX_CYCLE_COUNTER + cpu_pmu->num_events - 1) |
| |
| #define ARMV7_MAX_COUNTERS 32 |
| #define ARMV7_COUNTER_MASK (ARMV7_MAX_COUNTERS - 1) |
| |
| /* |
| * ARMv7 low level PMNC access |
| */ |
| |
| /* |
| * Perf Event to low level counters mapping |
| */ |
| #define ARMV7_IDX_TO_COUNTER(x) \ |
| (((x) - ARMV7_IDX_COUNTER0) & ARMV7_COUNTER_MASK) |
| |
| /* |
| * 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 */ |
| |
| /* |
| * FLAG: counters overflow flag status reg |
| */ |
| #define ARMV7_FLAG_MASK 0xffffffff /* Mask for writable bits */ |
| #define ARMV7_OVERFLOWED_MASK ARMV7_FLAG_MASK |
| |
| /* |
| * PMXEVTYPER: Event selection reg |
| */ |
| #define ARMV7_EVTYPE_MASK 0xc00000ff /* Mask for writable bits */ |
| #define ARMV7_EVTYPE_EVENT 0xff /* Mask for EVENT bits */ |
| |
| /* |
| * Event filters for PMUv2 |
| */ |
| #define ARMV7_EXCLUDE_PL1 (1 << 31) |
| #define ARMV7_EXCLUDE_USER (1 << 30) |
| #define ARMV7_INCLUDE_HYP (1 << 27) |
| |
| static inline u32 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(u32 val) |
| { |
| val &= ARMV7_PMNC_MASK; |
| isb(); |
| asm volatile("mcr p15, 0, %0, c9, c12, 0" : : "r"(val)); |
| } |
| |
| static inline int armv7_pmnc_has_overflowed(u32 pmnc) |
| { |
| return pmnc & ARMV7_OVERFLOWED_MASK; |
| } |
| |
| static inline int armv7_pmnc_counter_valid(int idx) |
| { |
| return idx >= ARMV7_IDX_CYCLE_COUNTER && idx <= ARMV7_IDX_COUNTER_LAST; |
| } |
| |
| static inline int armv7_pmnc_counter_has_overflowed(u32 pmnc, int idx) |
| { |
| int ret = 0; |
| u32 counter; |
| |
| if (!armv7_pmnc_counter_valid(idx)) { |
| pr_err("CPU%u checking wrong counter %d overflow status\n", |
| smp_processor_id(), idx); |
| } else { |
| counter = ARMV7_IDX_TO_COUNTER(idx); |
| ret = pmnc & BIT(counter); |
| } |
| |
| return ret; |
| } |
| |
| static inline int armv7_pmnc_select_counter(int idx) |
| { |
| u32 counter; |
| |
| if (!armv7_pmnc_counter_valid(idx)) { |
| pr_err("CPU%u selecting wrong PMNC counter %d\n", |
| smp_processor_id(), idx); |
| return -EINVAL; |
| } |
| |
| counter = ARMV7_IDX_TO_COUNTER(idx); |
| asm volatile("mcr p15, 0, %0, c9, c12, 5" : : "r" (counter)); |
| isb(); |
| |
| return idx; |
| } |
| |
| static inline u32 armv7pmu_read_counter(int idx) |
| { |
| u32 value = 0; |
| |
| if (!armv7_pmnc_counter_valid(idx)) |
| pr_err("CPU%u reading wrong counter %d\n", |
| smp_processor_id(), idx); |
| else if (idx == ARMV7_IDX_CYCLE_COUNTER) |
| asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (value)); |
| else if (armv7_pmnc_select_counter(idx) == idx) |
| asm volatile("mrc p15, 0, %0, c9, c13, 2" : "=r" (value)); |
| |
| return value; |
| } |
| |
| static inline void armv7pmu_write_counter(int idx, u32 value) |
| { |
| if (!armv7_pmnc_counter_valid(idx)) |
| pr_err("CPU%u writing wrong counter %d\n", |
| smp_processor_id(), idx); |
| else if (idx == ARMV7_IDX_CYCLE_COUNTER) |
| asm volatile("mcr p15, 0, %0, c9, c13, 0" : : "r" (value)); |
| else if (armv7_pmnc_select_counter(idx) == idx) |
| asm volatile("mcr p15, 0, %0, c9, c13, 2" : : "r" (value)); |
| } |
| |
| static inline void armv7_pmnc_write_evtsel(int idx, u32 val) |
| { |
| if (armv7_pmnc_select_counter(idx) == idx) { |
| val &= ARMV7_EVTYPE_MASK; |
| asm volatile("mcr p15, 0, %0, c9, c13, 1" : : "r" (val)); |
| } |
| } |
| |
| static inline int armv7_pmnc_enable_counter(int idx) |
| { |
| u32 counter; |
| |
| if (!armv7_pmnc_counter_valid(idx)) { |
| pr_err("CPU%u enabling wrong PMNC counter %d\n", |
| smp_processor_id(), idx); |
| return -EINVAL; |
| } |
| |
| counter = ARMV7_IDX_TO_COUNTER(idx); |
| asm volatile("mcr p15, 0, %0, c9, c12, 1" : : "r" (BIT(counter))); |
| return idx; |
| } |
| |
| static inline int armv7_pmnc_disable_counter(int idx) |
| { |
| u32 counter; |
| |
| if (!armv7_pmnc_counter_valid(idx)) { |
| pr_err("CPU%u disabling wrong PMNC counter %d\n", |
| smp_processor_id(), idx); |
| return -EINVAL; |
| } |
| |
| counter = ARMV7_IDX_TO_COUNTER(idx); |
| asm volatile("mcr p15, 0, %0, c9, c12, 2" : : "r" (BIT(counter))); |
| return idx; |
| } |
| |
| static inline int armv7_pmnc_enable_intens(int idx) |
| { |
| u32 counter; |
| |
| if (!armv7_pmnc_counter_valid(idx)) { |
| pr_err("CPU%u enabling wrong PMNC counter IRQ enable %d\n", |
| smp_processor_id(), idx); |
| return -EINVAL; |
| } |
| |
| counter = ARMV7_IDX_TO_COUNTER(idx); |
| asm volatile("mcr p15, 0, %0, c9, c14, 1" : : "r" (BIT(counter))); |
| return idx; |
| } |
| |
| static inline int armv7_pmnc_disable_intens(int idx) |
| { |
| u32 counter; |
| |
| if (!armv7_pmnc_counter_valid(idx)) { |
| pr_err("CPU%u disabling wrong PMNC counter IRQ enable %d\n", |
| smp_processor_id(), idx); |
| return -EINVAL; |
| } |
| |
| counter = ARMV7_IDX_TO_COUNTER(idx); |
| asm volatile("mcr p15, 0, %0, c9, c14, 2" : : "r" (BIT(counter))); |
| isb(); |
| /* Clear the overflow flag in case an interrupt is pending. */ |
| asm volatile("mcr p15, 0, %0, c9, c12, 3" : : "r" (BIT(counter))); |
| isb(); |
| |
| 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_IDX_COUNTER0; cnt <= ARMV7_IDX_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", |
| ARMV7_IDX_TO_COUNTER(cnt), val); |
| asm volatile("mrc p15, 0, %0, c9, c13, 1" : "=r" (val)); |
| printk(KERN_INFO "CNT[%d] evtsel=0x%08x\n", |
| ARMV7_IDX_TO_COUNTER(cnt), val); |
| } |
| } |
| #endif |
| |
| static void armv7pmu_enable_event(struct hw_perf_event *hwc, int idx) |
| { |
| unsigned long flags; |
| struct pmu_hw_events *events = cpu_pmu->get_hw_events(); |
| |
| /* |
| * Enable counter and interrupt, and set the counter to count |
| * the event that we're interested in. |
| */ |
| raw_spin_lock_irqsave(&events->pmu_lock, flags); |
| |
| /* |
| * Disable counter |
| */ |
| armv7_pmnc_disable_counter(idx); |
| |
| /* |
| * Set event (if destined for PMNx counters) |
| * We only need to set the event for the cycle counter if we |
| * have the ability to perform event filtering. |
| */ |
| if (armv7pmu.set_event_filter || idx != ARMV7_IDX_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); |
| |
| raw_spin_unlock_irqrestore(&events->pmu_lock, flags); |
| } |
| |
| static void armv7pmu_disable_event(struct hw_perf_event *hwc, int idx) |
| { |
| unsigned long flags; |
| struct pmu_hw_events *events = cpu_pmu->get_hw_events(); |
| |
| /* |
| * Disable counter and interrupt |
| */ |
| raw_spin_lock_irqsave(&events->pmu_lock, flags); |
| |
| /* |
| * Disable counter |
| */ |
| armv7_pmnc_disable_counter(idx); |
| |
| /* |
| * Disable interrupt for this counter |
| */ |
| armv7_pmnc_disable_intens(idx); |
| |
| raw_spin_unlock_irqrestore(&events->pmu_lock, flags); |
| } |
| |
| static irqreturn_t armv7pmu_handle_irq(int irq_num, void *dev) |
| { |
| u32 pmnc; |
| struct perf_sample_data data; |
| struct pmu_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(); |
| |
| cpuc = &__get_cpu_var(cpu_hw_events); |
| for (idx = 0; idx < cpu_pmu->num_events; ++idx) { |
| struct perf_event *event = cpuc->events[idx]; |
| struct hw_perf_event *hwc; |
| |
| /* Ignore if we don't have an event. */ |
| if (!event) |
| 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); |
| perf_sample_data_init(&data, 0, hwc->last_period); |
| if (!armpmu_event_set_period(event, hwc, idx)) |
| continue; |
| |
| if (perf_event_overflow(event, &data, regs)) |
| cpu_pmu->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; |
| struct pmu_hw_events *events = cpu_pmu->get_hw_events(); |
| |
| raw_spin_lock_irqsave(&events->pmu_lock, flags); |
| /* Enable all counters */ |
| armv7_pmnc_write(armv7_pmnc_read() | ARMV7_PMNC_E); |
| raw_spin_unlock_irqrestore(&events->pmu_lock, flags); |
| } |
| |
| static void armv7pmu_stop(void) |
| { |
| unsigned long flags; |
| struct pmu_hw_events *events = cpu_pmu->get_hw_events(); |
| |
| raw_spin_lock_irqsave(&events->pmu_lock, flags); |
| /* Disable all counters */ |
| armv7_pmnc_write(armv7_pmnc_read() & ~ARMV7_PMNC_E); |
| raw_spin_unlock_irqrestore(&events->pmu_lock, flags); |
| } |
| |
| static int armv7pmu_get_event_idx(struct pmu_hw_events *cpuc, |
| struct hw_perf_event *event) |
| { |
| int idx; |
| unsigned long evtype = event->config_base & ARMV7_EVTYPE_EVENT; |
| |
| /* Always place a cycle counter into the cycle counter. */ |
| if (evtype == ARMV7_PERFCTR_CPU_CYCLES) { |
| if (test_and_set_bit(ARMV7_IDX_CYCLE_COUNTER, cpuc->used_mask)) |
| return -EAGAIN; |
| |
| return ARMV7_IDX_CYCLE_COUNTER; |
| } |
| |
| /* |
| * For anything other than a cycle counter, try and use |
| * the events counters |
| */ |
| for (idx = ARMV7_IDX_COUNTER0; idx < cpu_pmu->num_events; ++idx) { |
| if (!test_and_set_bit(idx, cpuc->used_mask)) |
| return idx; |
| } |
| |
| /* The counters are all in use. */ |
| return -EAGAIN; |
| } |
| |
| /* |
| * Add an event filter to a given event. This will only work for PMUv2 PMUs. |
| */ |
| static int armv7pmu_set_event_filter(struct hw_perf_event *event, |
| struct perf_event_attr *attr) |
| { |
| unsigned long config_base = 0; |
| |
| if (attr->exclude_idle) |
| return -EPERM; |
| if (attr->exclude_user) |
| config_base |= ARMV7_EXCLUDE_USER; |
| if (attr->exclude_kernel) |
| config_base |= ARMV7_EXCLUDE_PL1; |
| if (!attr->exclude_hv) |
| config_base |= ARMV7_INCLUDE_HYP; |
| |
| /* |
| * Install the filter into config_base as this is used to |
| * construct the event type. |
| */ |
| event->config_base = config_base; |
| |
| return 0; |
| } |
| |
| static void armv7pmu_reset(void *info) |
| { |
| u32 idx, nb_cnt = cpu_pmu->num_events; |
| |
| /* The counter and interrupt enable registers are unknown at reset. */ |
| for (idx = ARMV7_IDX_CYCLE_COUNTER; idx < nb_cnt; ++idx) |
| armv7pmu_disable_event(NULL, idx); |
| |
| /* Initialize & Reset PMNC: C and P bits */ |
| armv7_pmnc_write(ARMV7_PMNC_P | ARMV7_PMNC_C); |
| } |
| |
| static int armv7_a8_map_event(struct perf_event *event) |
| { |
| return map_cpu_event(event, &armv7_a8_perf_map, |
| &armv7_a8_perf_cache_map, 0xFF); |
| } |
| |
| static int armv7_a9_map_event(struct perf_event *event) |
| { |
| return map_cpu_event(event, &armv7_a9_perf_map, |
| &armv7_a9_perf_cache_map, 0xFF); |
| } |
| |
| static int armv7_a5_map_event(struct perf_event *event) |
| { |
| return map_cpu_event(event, &armv7_a5_perf_map, |
| &armv7_a5_perf_cache_map, 0xFF); |
| } |
| |
| static int armv7_a15_map_event(struct perf_event *event) |
| { |
| return map_cpu_event(event, &armv7_a15_perf_map, |
| &armv7_a15_perf_cache_map, 0xFF); |
| } |
| |
| static int armv7_a7_map_event(struct perf_event *event) |
| { |
| return map_cpu_event(event, &armv7_a7_perf_map, |
| &armv7_a7_perf_cache_map, 0xFF); |
| } |
| |
| 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, |
| .reset = armv7pmu_reset, |
| .max_period = (1LLU << 32) - 1, |
| }; |
| |
| static u32 __init armv7_read_num_pmnc_events(void) |
| { |
| u32 nb_cnt; |
| |
| /* 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; |
| } |
| |
| static struct arm_pmu *__init armv7_a8_pmu_init(void) |
| { |
| armv7pmu.name = "ARMv7 Cortex-A8"; |
| armv7pmu.map_event = armv7_a8_map_event; |
| armv7pmu.num_events = armv7_read_num_pmnc_events(); |
| return &armv7pmu; |
| } |
| |
| static struct arm_pmu *__init armv7_a9_pmu_init(void) |
| { |
| armv7pmu.name = "ARMv7 Cortex-A9"; |
| armv7pmu.map_event = armv7_a9_map_event; |
| armv7pmu.num_events = armv7_read_num_pmnc_events(); |
| return &armv7pmu; |
| } |
| |
| static struct arm_pmu *__init armv7_a5_pmu_init(void) |
| { |
| armv7pmu.name = "ARMv7 Cortex-A5"; |
| armv7pmu.map_event = armv7_a5_map_event; |
| armv7pmu.num_events = armv7_read_num_pmnc_events(); |
| return &armv7pmu; |
| } |
| |
| static struct arm_pmu *__init armv7_a15_pmu_init(void) |
| { |
| armv7pmu.name = "ARMv7 Cortex-A15"; |
| armv7pmu.map_event = armv7_a15_map_event; |
| armv7pmu.num_events = armv7_read_num_pmnc_events(); |
| armv7pmu.set_event_filter = armv7pmu_set_event_filter; |
| return &armv7pmu; |
| } |
| |
| static struct arm_pmu *__init armv7_a7_pmu_init(void) |
| { |
| armv7pmu.name = "ARMv7 Cortex-A7"; |
| armv7pmu.map_event = armv7_a7_map_event; |
| armv7pmu.num_events = armv7_read_num_pmnc_events(); |
| armv7pmu.set_event_filter = armv7pmu_set_event_filter; |
| return &armv7pmu; |
| } |
| #else |
| static struct arm_pmu *__init armv7_a8_pmu_init(void) |
| { |
| return NULL; |
| } |
| |
| static struct arm_pmu *__init armv7_a9_pmu_init(void) |
| { |
| return NULL; |
| } |
| |
| static struct arm_pmu *__init armv7_a5_pmu_init(void) |
| { |
| return NULL; |
| } |
| |
| static struct arm_pmu *__init armv7_a15_pmu_init(void) |
| { |
| return NULL; |
| } |
| |
| static struct arm_pmu *__init armv7_a7_pmu_init(void) |
| { |
| return NULL; |
| } |
| #endif /* CONFIG_CPU_V7 */ |