diff options
Diffstat (limited to 'arch/sh/kernel/cpu/sh4/perf_event.c')
| -rw-r--r-- | arch/sh/kernel/cpu/sh4/perf_event.c | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/arch/sh/kernel/cpu/sh4/perf_event.c b/arch/sh/kernel/cpu/sh4/perf_event.c new file mode 100644 index 000000000..fa4f724b2 --- /dev/null +++ b/arch/sh/kernel/cpu/sh4/perf_event.c @@ -0,0 +1,268 @@ +/* + * Performance events support for SH7750-style performance counters + * + * Copyright (C) 2009 Paul Mundt + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/irq.h> +#include <linux/perf_event.h> +#include <asm/processor.h> + +#define PM_CR_BASE 0xff000084 /* 16-bit */ +#define PM_CTR_BASE 0xff100004 /* 32-bit */ + +#define PMCR(n) (PM_CR_BASE + ((n) * 0x04)) +#define PMCTRH(n) (PM_CTR_BASE + 0x00 + ((n) * 0x08)) +#define PMCTRL(n) (PM_CTR_BASE + 0x04 + ((n) * 0x08)) + +#define PMCR_PMM_MASK 0x0000003f + +#define PMCR_CLKF 0x00000100 +#define PMCR_PMCLR 0x00002000 +#define PMCR_PMST 0x00004000 +#define PMCR_PMEN 0x00008000 + +static struct sh_pmu sh7750_pmu; + +/* + * There are a number of events supported by each counter (33 in total). + * Since we have 2 counters, each counter will take the event code as it + * corresponds to the PMCR PMM setting. Each counter can be configured + * independently. + * + * Event Code Description + * ---------- ----------- + * + * 0x01 Operand read access + * 0x02 Operand write access + * 0x03 UTLB miss + * 0x04 Operand cache read miss + * 0x05 Operand cache write miss + * 0x06 Instruction fetch (w/ cache) + * 0x07 Instruction TLB miss + * 0x08 Instruction cache miss + * 0x09 All operand accesses + * 0x0a All instruction accesses + * 0x0b OC RAM operand access + * 0x0d On-chip I/O space access + * 0x0e Operand access (r/w) + * 0x0f Operand cache miss (r/w) + * 0x10 Branch instruction + * 0x11 Branch taken + * 0x12 BSR/BSRF/JSR + * 0x13 Instruction execution + * 0x14 Instruction execution in parallel + * 0x15 FPU Instruction execution + * 0x16 Interrupt + * 0x17 NMI + * 0x18 trapa instruction execution + * 0x19 UBCA match + * 0x1a UBCB match + * 0x21 Instruction cache fill + * 0x22 Operand cache fill + * 0x23 Elapsed time + * 0x24 Pipeline freeze by I-cache miss + * 0x25 Pipeline freeze by D-cache miss + * 0x27 Pipeline freeze by branch instruction + * 0x28 Pipeline freeze by CPU register + * 0x29 Pipeline freeze by FPU + */ + +static const int sh7750_general_events[] = { + [PERF_COUNT_HW_CPU_CYCLES] = 0x0023, + [PERF_COUNT_HW_INSTRUCTIONS] = 0x000a, + [PERF_COUNT_HW_CACHE_REFERENCES] = 0x0006, /* I-cache */ + [PERF_COUNT_HW_CACHE_MISSES] = 0x0008, /* I-cache */ + [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x0010, + [PERF_COUNT_HW_BRANCH_MISSES] = -1, + [PERF_COUNT_HW_BUS_CYCLES] = -1, +}; + +#define C(x) PERF_COUNT_HW_CACHE_##x + +static const int sh7750_cache_events + [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) ] = 0x0001, + [ C(RESULT_MISS) ] = 0x0004, + }, + [ C(OP_WRITE) ] = { + [ C(RESULT_ACCESS) ] = 0x0002, + [ C(RESULT_MISS) ] = 0x0005, + }, + [ C(OP_PREFETCH) ] = { + [ C(RESULT_ACCESS) ] = 0, + [ C(RESULT_MISS) ] = 0, + }, + }, + + [ C(L1I) ] = { + [ C(OP_READ) ] = { + [ C(RESULT_ACCESS) ] = 0x0006, + [ C(RESULT_MISS) ] = 0x0008, + }, + [ C(OP_WRITE) ] = { + [ C(RESULT_ACCESS) ] = -1, + [ C(RESULT_MISS) ] = -1, + }, + [ C(OP_PREFETCH) ] = { + [ C(RESULT_ACCESS) ] = 0, + [ C(RESULT_MISS) ] = 0, + }, + }, + + [ C(LL) ] = { + [ C(OP_READ) ] = { + [ C(RESULT_ACCESS) ] = 0, + [ C(RESULT_MISS) ] = 0, + }, + [ C(OP_WRITE) ] = { + [ C(RESULT_ACCESS) ] = 0, + [ C(RESULT_MISS) ] = 0, + }, + [ C(OP_PREFETCH) ] = { + [ C(RESULT_ACCESS) ] = 0, + [ C(RESULT_MISS) ] = 0, + }, + }, + + [ C(DTLB) ] = { + [ C(OP_READ) ] = { + [ C(RESULT_ACCESS) ] = 0, + [ C(RESULT_MISS) ] = 0x0003, + }, + [ C(OP_WRITE) ] = { + [ C(RESULT_ACCESS) ] = 0, + [ C(RESULT_MISS) ] = 0, + }, + [ C(OP_PREFETCH) ] = { + [ C(RESULT_ACCESS) ] = 0, + [ C(RESULT_MISS) ] = 0, + }, + }, + + [ C(ITLB) ] = { + [ C(OP_READ) ] = { + [ C(RESULT_ACCESS) ] = 0, + [ C(RESULT_MISS) ] = 0x0007, + }, + [ C(OP_WRITE) ] = { + [ C(RESULT_ACCESS) ] = -1, + [ C(RESULT_MISS) ] = -1, + }, + [ C(OP_PREFETCH) ] = { + [ C(RESULT_ACCESS) ] = -1, + [ C(RESULT_MISS) ] = -1, + }, + }, + + [ C(BPU) ] = { + [ C(OP_READ) ] = { + [ C(RESULT_ACCESS) ] = -1, + [ C(RESULT_MISS) ] = -1, + }, + [ C(OP_WRITE) ] = { + [ C(RESULT_ACCESS) ] = -1, + [ C(RESULT_MISS) ] = -1, + }, + [ C(OP_PREFETCH) ] = { + [ C(RESULT_ACCESS) ] = -1, + [ C(RESULT_MISS) ] = -1, + }, + }, + + [ C(NODE) ] = { + [ C(OP_READ) ] = { + [ C(RESULT_ACCESS) ] = -1, + [ C(RESULT_MISS) ] = -1, + }, + [ C(OP_WRITE) ] = { + [ C(RESULT_ACCESS) ] = -1, + [ C(RESULT_MISS) ] = -1, + }, + [ C(OP_PREFETCH) ] = { + [ C(RESULT_ACCESS) ] = -1, + [ C(RESULT_MISS) ] = -1, + }, + }, +}; + +static int sh7750_event_map(int event) +{ + return sh7750_general_events[event]; +} + +static u64 sh7750_pmu_read(int idx) +{ + return (u64)((u64)(__raw_readl(PMCTRH(idx)) & 0xffff) << 32) | + __raw_readl(PMCTRL(idx)); +} + +static void sh7750_pmu_disable(struct hw_perf_event *hwc, int idx) +{ + unsigned int tmp; + + tmp = __raw_readw(PMCR(idx)); + tmp &= ~(PMCR_PMM_MASK | PMCR_PMEN); + __raw_writew(tmp, PMCR(idx)); +} + +static void sh7750_pmu_enable(struct hw_perf_event *hwc, int idx) +{ + __raw_writew(__raw_readw(PMCR(idx)) | PMCR_PMCLR, PMCR(idx)); + __raw_writew(hwc->config | PMCR_PMEN | PMCR_PMST, PMCR(idx)); +} + +static void sh7750_pmu_disable_all(void) +{ + int i; + + for (i = 0; i < sh7750_pmu.num_events; i++) + __raw_writew(__raw_readw(PMCR(i)) & ~PMCR_PMEN, PMCR(i)); +} + +static void sh7750_pmu_enable_all(void) +{ + int i; + + for (i = 0; i < sh7750_pmu.num_events; i++) + __raw_writew(__raw_readw(PMCR(i)) | PMCR_PMEN, PMCR(i)); +} + +static struct sh_pmu sh7750_pmu = { + .name = "sh7750", + .num_events = 2, + .event_map = sh7750_event_map, + .max_events = ARRAY_SIZE(sh7750_general_events), + .raw_event_mask = PMCR_PMM_MASK, + .cache_events = &sh7750_cache_events, + .read = sh7750_pmu_read, + .disable = sh7750_pmu_disable, + .enable = sh7750_pmu_enable, + .disable_all = sh7750_pmu_disable_all, + .enable_all = sh7750_pmu_enable_all, +}; + +static int __init sh7750_pmu_init(void) +{ + /* + * Make sure this CPU actually has perf counters. + */ + if (!(boot_cpu_data.flags & CPU_HAS_PERF_COUNTER)) { + pr_notice("HW perf events unsupported, software events only.\n"); + return -ENODEV; + } + + return register_sh_pmu(&sh7750_pmu); +} +early_initcall(sh7750_pmu_init); |