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linux/arch/csky/kernel/perf_event.c

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// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/perf_event.h>
#include <linux/platform_device.h>
#define CSKY_PMU_MAX_EVENTS 32
#define HPCR "<0, 0x0>" /* PMU Control reg */
#define HPCNTENR "<0, 0x4>" /* Count Enable reg */
static uint64_t (*hw_raw_read_mapping[CSKY_PMU_MAX_EVENTS])(void);
static void (*hw_raw_write_mapping[CSKY_PMU_MAX_EVENTS])(uint64_t val);
struct csky_pmu_t {
struct pmu pmu;
uint32_t hpcr;
} csky_pmu;
#define cprgr(reg) \
({ \
unsigned int tmp; \
asm volatile("cprgr %0, "reg"\n" \
: "=r"(tmp) \
: \
: "memory"); \
tmp; \
})
#define cpwgr(reg, val) \
({ \
asm volatile( \
"cpwgr %0, "reg"\n" \
: \
: "r"(val) \
: "memory"); \
})
#define cprcr(reg) \
({ \
unsigned int tmp; \
asm volatile("cprcr %0, "reg"\n" \
: "=r"(tmp) \
: \
: "memory"); \
tmp; \
})
#define cpwcr(reg, val) \
({ \
asm volatile( \
"cpwcr %0, "reg"\n" \
: \
: "r"(val) \
: "memory"); \
})
/* cycle counter */
static uint64_t csky_pmu_read_cc(void)
{
uint32_t lo, hi, tmp;
uint64_t result;
do {
tmp = cprgr("<0, 0x3>");
lo = cprgr("<0, 0x2>");
hi = cprgr("<0, 0x3>");
} while (hi != tmp);
result = (uint64_t) (hi) << 32;
result |= lo;
return result;
}
static void csky_pmu_write_cc(uint64_t val)
{
cpwgr("<0, 0x2>", (uint32_t) val);
cpwgr("<0, 0x3>", (uint32_t) (val >> 32));
}
/* instruction counter */
static uint64_t csky_pmu_read_ic(void)
{
uint32_t lo, hi, tmp;
uint64_t result;
do {
tmp = cprgr("<0, 0x5>");
lo = cprgr("<0, 0x4>");
hi = cprgr("<0, 0x5>");
} while (hi != tmp);
result = (uint64_t) (hi) << 32;
result |= lo;
return result;
}
static void csky_pmu_write_ic(uint64_t val)
{
cpwgr("<0, 0x4>", (uint32_t) val);
cpwgr("<0, 0x5>", (uint32_t) (val >> 32));
}
/* l1 icache access counter */
static uint64_t csky_pmu_read_icac(void)
{
uint32_t lo, hi, tmp;
uint64_t result;
do {
tmp = cprgr("<0, 0x7>");
lo = cprgr("<0, 0x6>");
hi = cprgr("<0, 0x7>");
} while (hi != tmp);
result = (uint64_t) (hi) << 32;
result |= lo;
return result;
}
static void csky_pmu_write_icac(uint64_t val)
{
cpwgr("<0, 0x6>", (uint32_t) val);
cpwgr("<0, 0x7>", (uint32_t) (val >> 32));
}
/* l1 icache miss counter */
static uint64_t csky_pmu_read_icmc(void)
{
uint32_t lo, hi, tmp;
uint64_t result;
do {
tmp = cprgr("<0, 0x9>");
lo = cprgr("<0, 0x8>");
hi = cprgr("<0, 0x9>");
} while (hi != tmp);
result = (uint64_t) (hi) << 32;
result |= lo;
return result;
}
static void csky_pmu_write_icmc(uint64_t val)
{
cpwgr("<0, 0x8>", (uint32_t) val);
cpwgr("<0, 0x9>", (uint32_t) (val >> 32));
}
/* l1 dcache access counter */
static uint64_t csky_pmu_read_dcac(void)
{
uint32_t lo, hi, tmp;
uint64_t result;
do {
tmp = cprgr("<0, 0xb>");
lo = cprgr("<0, 0xa>");
hi = cprgr("<0, 0xb>");
} while (hi != tmp);
result = (uint64_t) (hi) << 32;
result |= lo;
return result;
}
static void csky_pmu_write_dcac(uint64_t val)
{
cpwgr("<0, 0xa>", (uint32_t) val);
cpwgr("<0, 0xb>", (uint32_t) (val >> 32));
}
/* l1 dcache miss counter */
static uint64_t csky_pmu_read_dcmc(void)
{
uint32_t lo, hi, tmp;
uint64_t result;
do {
tmp = cprgr("<0, 0xd>");
lo = cprgr("<0, 0xc>");
hi = cprgr("<0, 0xd>");
} while (hi != tmp);
result = (uint64_t) (hi) << 32;
result |= lo;
return result;
}
static void csky_pmu_write_dcmc(uint64_t val)
{
cpwgr("<0, 0xc>", (uint32_t) val);
cpwgr("<0, 0xd>", (uint32_t) (val >> 32));
}
/* l2 cache access counter */
static uint64_t csky_pmu_read_l2ac(void)
{
uint32_t lo, hi, tmp;
uint64_t result;
do {
tmp = cprgr("<0, 0xf>");
lo = cprgr("<0, 0xe>");
hi = cprgr("<0, 0xf>");
} while (hi != tmp);
result = (uint64_t) (hi) << 32;
result |= lo;
return result;
}
static void csky_pmu_write_l2ac(uint64_t val)
{
cpwgr("<0, 0xe>", (uint32_t) val);
cpwgr("<0, 0xf>", (uint32_t) (val >> 32));
}
/* l2 cache miss counter */
static uint64_t csky_pmu_read_l2mc(void)
{
uint32_t lo, hi, tmp;
uint64_t result;
do {
tmp = cprgr("<0, 0x11>");
lo = cprgr("<0, 0x10>");
hi = cprgr("<0, 0x11>");
} while (hi != tmp);
result = (uint64_t) (hi) << 32;
result |= lo;
return result;
}
static void csky_pmu_write_l2mc(uint64_t val)
{
cpwgr("<0, 0x10>", (uint32_t) val);
cpwgr("<0, 0x11>", (uint32_t) (val >> 32));
}
/* I-UTLB miss counter */
static uint64_t csky_pmu_read_iutlbmc(void)
{
uint32_t lo, hi, tmp;
uint64_t result;
do {
tmp = cprgr("<0, 0x15>");
lo = cprgr("<0, 0x14>");
hi = cprgr("<0, 0x15>");
} while (hi != tmp);
result = (uint64_t) (hi) << 32;
result |= lo;
return result;
}
static void csky_pmu_write_iutlbmc(uint64_t val)
{
cpwgr("<0, 0x14>", (uint32_t) val);
cpwgr("<0, 0x15>", (uint32_t) (val >> 32));
}
/* D-UTLB miss counter */
static uint64_t csky_pmu_read_dutlbmc(void)
{
uint32_t lo, hi, tmp;
uint64_t result;
do {
tmp = cprgr("<0, 0x17>");
lo = cprgr("<0, 0x16>");
hi = cprgr("<0, 0x17>");
} while (hi != tmp);
result = (uint64_t) (hi) << 32;
result |= lo;
return result;
}
static void csky_pmu_write_dutlbmc(uint64_t val)
{
cpwgr("<0, 0x16>", (uint32_t) val);
cpwgr("<0, 0x17>", (uint32_t) (val >> 32));
}
/* JTLB miss counter */
static uint64_t csky_pmu_read_jtlbmc(void)
{
uint32_t lo, hi, tmp;
uint64_t result;
do {
tmp = cprgr("<0, 0x19>");
lo = cprgr("<0, 0x18>");
hi = cprgr("<0, 0x19>");
} while (hi != tmp);
result = (uint64_t) (hi) << 32;
result |= lo;
return result;
}
static void csky_pmu_write_jtlbmc(uint64_t val)
{
cpwgr("<0, 0x18>", (uint32_t) val);
cpwgr("<0, 0x19>", (uint32_t) (val >> 32));
}
/* software counter */
static uint64_t csky_pmu_read_softc(void)
{
uint32_t lo, hi, tmp;
uint64_t result;
do {
tmp = cprgr("<0, 0x1b>");
lo = cprgr("<0, 0x1a>");
hi = cprgr("<0, 0x1b>");
} while (hi != tmp);
result = (uint64_t) (hi) << 32;
result |= lo;
return result;
}
static void csky_pmu_write_softc(uint64_t val)
{
cpwgr("<0, 0x1a>", (uint32_t) val);
cpwgr("<0, 0x1b>", (uint32_t) (val >> 32));
}
/* conditional branch mispredict counter */
static uint64_t csky_pmu_read_cbmc(void)
{
uint32_t lo, hi, tmp;
uint64_t result;
do {
tmp = cprgr("<0, 0x1d>");
lo = cprgr("<0, 0x1c>");
hi = cprgr("<0, 0x1d>");
} while (hi != tmp);
result = (uint64_t) (hi) << 32;
result |= lo;
return result;
}
static void csky_pmu_write_cbmc(uint64_t val)
{
cpwgr("<0, 0x1c>", (uint32_t) val);
cpwgr("<0, 0x1d>", (uint32_t) (val >> 32));
}
/* conditional branch instruction counter */
static uint64_t csky_pmu_read_cbic(void)
{
uint32_t lo, hi, tmp;
uint64_t result;
do {
tmp = cprgr("<0, 0x1f>");
lo = cprgr("<0, 0x1e>");
hi = cprgr("<0, 0x1f>");
} while (hi != tmp);
result = (uint64_t) (hi) << 32;
result |= lo;
return result;
}
static void csky_pmu_write_cbic(uint64_t val)
{
cpwgr("<0, 0x1e>", (uint32_t) val);
cpwgr("<0, 0x1f>", (uint32_t) (val >> 32));
}
/* indirect branch mispredict counter */
static uint64_t csky_pmu_read_ibmc(void)
{
uint32_t lo, hi, tmp;
uint64_t result;
do {
tmp = cprgr("<0, 0x21>");
lo = cprgr("<0, 0x20>");
hi = cprgr("<0, 0x21>");
} while (hi != tmp);
result = (uint64_t) (hi) << 32;
result |= lo;
return result;
}
static void csky_pmu_write_ibmc(uint64_t val)
{
cpwgr("<0, 0x20>", (uint32_t) val);
cpwgr("<0, 0x21>", (uint32_t) (val >> 32));
}
/* indirect branch instruction counter */
static uint64_t csky_pmu_read_ibic(void)
{
uint32_t lo, hi, tmp;
uint64_t result;
do {
tmp = cprgr("<0, 0x23>");
lo = cprgr("<0, 0x22>");
hi = cprgr("<0, 0x23>");
} while (hi != tmp);
result = (uint64_t) (hi) << 32;
result |= lo;
return result;
}
static void csky_pmu_write_ibic(uint64_t val)
{
cpwgr("<0, 0x22>", (uint32_t) val);
cpwgr("<0, 0x23>", (uint32_t) (val >> 32));
}
/* LSU spec fail counter */
static uint64_t csky_pmu_read_lsfc(void)
{
uint32_t lo, hi, tmp;
uint64_t result;
do {
tmp = cprgr("<0, 0x25>");
lo = cprgr("<0, 0x24>");
hi = cprgr("<0, 0x25>");
} while (hi != tmp);
result = (uint64_t) (hi) << 32;
result |= lo;
return result;
}
static void csky_pmu_write_lsfc(uint64_t val)
{
cpwgr("<0, 0x24>", (uint32_t) val);
cpwgr("<0, 0x25>", (uint32_t) (val >> 32));
}
/* store instruction counter */
static uint64_t csky_pmu_read_sic(void)
{
uint32_t lo, hi, tmp;
uint64_t result;
do {
tmp = cprgr("<0, 0x27>");
lo = cprgr("<0, 0x26>");
hi = cprgr("<0, 0x27>");
} while (hi != tmp);
result = (uint64_t) (hi) << 32;
result |= lo;
return result;
}
static void csky_pmu_write_sic(uint64_t val)
{
cpwgr("<0, 0x26>", (uint32_t) val);
cpwgr("<0, 0x27>", (uint32_t) (val >> 32));
}
/* dcache read access counter */
static uint64_t csky_pmu_read_dcrac(void)
{
uint32_t lo, hi, tmp;
uint64_t result;
do {
tmp = cprgr("<0, 0x29>");
lo = cprgr("<0, 0x28>");
hi = cprgr("<0, 0x29>");
} while (hi != tmp);
result = (uint64_t) (hi) << 32;
result |= lo;
return result;
}
static void csky_pmu_write_dcrac(uint64_t val)
{
cpwgr("<0, 0x28>", (uint32_t) val);
cpwgr("<0, 0x29>", (uint32_t) (val >> 32));
}
/* dcache read miss counter */
static uint64_t csky_pmu_read_dcrmc(void)
{
uint32_t lo, hi, tmp;
uint64_t result;
do {
tmp = cprgr("<0, 0x2b>");
lo = cprgr("<0, 0x2a>");
hi = cprgr("<0, 0x2b>");
} while (hi != tmp);
result = (uint64_t) (hi) << 32;
result |= lo;
return result;
}
static void csky_pmu_write_dcrmc(uint64_t val)
{
cpwgr("<0, 0x2a>", (uint32_t) val);
cpwgr("<0, 0x2b>", (uint32_t) (val >> 32));
}
/* dcache write access counter */
static uint64_t csky_pmu_read_dcwac(void)
{
uint32_t lo, hi, tmp;
uint64_t result;
do {
tmp = cprgr("<0, 0x2d>");
lo = cprgr("<0, 0x2c>");
hi = cprgr("<0, 0x2d>");
} while (hi != tmp);
result = (uint64_t) (hi) << 32;
result |= lo;
return result;
}
static void csky_pmu_write_dcwac(uint64_t val)
{
cpwgr("<0, 0x2c>", (uint32_t) val);
cpwgr("<0, 0x2d>", (uint32_t) (val >> 32));
}
/* dcache write miss counter */
static uint64_t csky_pmu_read_dcwmc(void)
{
uint32_t lo, hi, tmp;
uint64_t result;
do {
tmp = cprgr("<0, 0x2f>");
lo = cprgr("<0, 0x2e>");
hi = cprgr("<0, 0x2f>");
} while (hi != tmp);
result = (uint64_t) (hi) << 32;
result |= lo;
return result;
}
static void csky_pmu_write_dcwmc(uint64_t val)
{
cpwgr("<0, 0x2e>", (uint32_t) val);
cpwgr("<0, 0x2f>", (uint32_t) (val >> 32));
}
/* l2cache read access counter */
static uint64_t csky_pmu_read_l2rac(void)
{
uint32_t lo, hi, tmp;
uint64_t result;
do {
tmp = cprgr("<0, 0x31>");
lo = cprgr("<0, 0x30>");
hi = cprgr("<0, 0x31>");
} while (hi != tmp);
result = (uint64_t) (hi) << 32;
result |= lo;
return result;
}
static void csky_pmu_write_l2rac(uint64_t val)
{
cpwgr("<0, 0x30>", (uint32_t) val);
cpwgr("<0, 0x31>", (uint32_t) (val >> 32));
}
/* l2cache read miss counter */
static uint64_t csky_pmu_read_l2rmc(void)
{
uint32_t lo, hi, tmp;
uint64_t result;
do {
tmp = cprgr("<0, 0x33>");
lo = cprgr("<0, 0x32>");
hi = cprgr("<0, 0x33>");
} while (hi != tmp);
result = (uint64_t) (hi) << 32;
result |= lo;
return result;
}
static void csky_pmu_write_l2rmc(uint64_t val)
{
cpwgr("<0, 0x32>", (uint32_t) val);
cpwgr("<0, 0x33>", (uint32_t) (val >> 32));
}
/* l2cache write access counter */
static uint64_t csky_pmu_read_l2wac(void)
{
uint32_t lo, hi, tmp;
uint64_t result;
do {
tmp = cprgr("<0, 0x35>");
lo = cprgr("<0, 0x34>");
hi = cprgr("<0, 0x35>");
} while (hi != tmp);
result = (uint64_t) (hi) << 32;
result |= lo;
return result;
}
static void csky_pmu_write_l2wac(uint64_t val)
{
cpwgr("<0, 0x34>", (uint32_t) val);
cpwgr("<0, 0x35>", (uint32_t) (val >> 32));
}
/* l2cache write miss counter */
static uint64_t csky_pmu_read_l2wmc(void)
{
uint32_t lo, hi, tmp;
uint64_t result;
do {
tmp = cprgr("<0, 0x37>");
lo = cprgr("<0, 0x36>");
hi = cprgr("<0, 0x37>");
} while (hi != tmp);
result = (uint64_t) (hi) << 32;
result |= lo;
return result;
}
static void csky_pmu_write_l2wmc(uint64_t val)
{
cpwgr("<0, 0x36>", (uint32_t) val);
cpwgr("<0, 0x37>", (uint32_t) (val >> 32));
}
#define HW_OP_UNSUPPORTED 0xffff
static const int csky_pmu_hw_map[PERF_COUNT_HW_MAX] = {
[PERF_COUNT_HW_CPU_CYCLES] = 0x1,
[PERF_COUNT_HW_INSTRUCTIONS] = 0x2,
[PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED,
[PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED,
[PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0xf,
[PERF_COUNT_HW_BRANCH_MISSES] = 0xe,
[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,
[PERF_COUNT_HW_REF_CPU_CYCLES] = HW_OP_UNSUPPORTED,
};
#define C(_x) PERF_COUNT_HW_CACHE_##_x
#define CACHE_OP_UNSUPPORTED 0xffff
static const int csky_pmu_cache_map[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
[C(L1D)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = 0x14,
[C(RESULT_MISS)] = 0x15,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = 0x16,
[C(RESULT_MISS)] = 0x17,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = 0x5,
[C(RESULT_MISS)] = 0x6,
},
},
[C(L1I)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = 0x3,
[C(RESULT_MISS)] = 0x4,
},
[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(LL)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = 0x18,
[C(RESULT_MISS)] = 0x19,
},
[C(OP_WRITE)] = {
[C(RESULT_ACCESS)] = 0x1a,
[C(RESULT_MISS)] = 0x1b,
},
[C(OP_PREFETCH)] = {
[C(RESULT_ACCESS)] = 0x7,
[C(RESULT_MISS)] = 0x8,
},
},
[C(DTLB)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = 0x5,
[C(RESULT_MISS)] = 0xb,
},
[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(ITLB)] = {
[C(OP_READ)] = {
[C(RESULT_ACCESS)] = 0x3,
[C(RESULT_MISS)] = 0xa,
},
[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(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,
},
},
[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,
},
},
};
static void csky_perf_event_update(struct perf_event *event,
struct hw_perf_event *hwc)
{
uint64_t prev_raw_count = local64_read(&hwc->prev_count);
uint64_t new_raw_count = hw_raw_read_mapping[hwc->idx]();
int64_t delta = new_raw_count - prev_raw_count;
/*
* We aren't afraid of hwc->prev_count changing beneath our feet
* because there's no way for us to re-enter this function anytime.
*/
local64_set(&hwc->prev_count, new_raw_count);
local64_add(delta, &event->count);
local64_sub(delta, &hwc->period_left);
}
static void csky_pmu_read(struct perf_event *event)
{
csky_perf_event_update(event, &event->hw);
}
static int csky_pmu_cache_event(u64 config)
{
unsigned int cache_type, cache_op, cache_result;
cache_type = (config >> 0) & 0xff;
cache_op = (config >> 8) & 0xff;
cache_result = (config >> 16) & 0xff;
if (cache_type >= PERF_COUNT_HW_CACHE_MAX)
return -EINVAL;
if (cache_op >= PERF_COUNT_HW_CACHE_OP_MAX)
return -EINVAL;
if (cache_result >= PERF_COUNT_HW_CACHE_RESULT_MAX)
return -EINVAL;
return csky_pmu_cache_map[cache_type][cache_op][cache_result];
}
static int csky_pmu_event_init(struct perf_event *event)
{
struct hw_perf_event *hwc = &event->hw;
int ret;
if (event->attr.exclude_user)
csky_pmu.hpcr = BIT(2);
else if (event->attr.exclude_kernel)
csky_pmu.hpcr = BIT(3);
else
csky_pmu.hpcr = BIT(2) | BIT(3);
csky_pmu.hpcr |= BIT(1) | BIT(0);
switch (event->attr.type) {
case PERF_TYPE_HARDWARE:
if (event->attr.config >= PERF_COUNT_HW_MAX)
return -ENOENT;
ret = csky_pmu_hw_map[event->attr.config];
if (ret == HW_OP_UNSUPPORTED)
return -ENOENT;
hwc->idx = ret;
return 0;
case PERF_TYPE_HW_CACHE:
ret = csky_pmu_cache_event(event->attr.config);
if (ret == CACHE_OP_UNSUPPORTED)
return -ENOENT;
hwc->idx = ret;
return 0;
case PERF_TYPE_RAW:
if (hw_raw_read_mapping[event->attr.config] == NULL)
return -ENOENT;
hwc->idx = event->attr.config;
return 0;
default:
return -ENOENT;
}
}
/* starts all counters */
static void csky_pmu_enable(struct pmu *pmu)
{
cpwcr(HPCR, csky_pmu.hpcr);
}
/* stops all counters */
static void csky_pmu_disable(struct pmu *pmu)
{
cpwcr(HPCR, BIT(1));
}
static void csky_pmu_start(struct perf_event *event, int flags)
{
struct hw_perf_event *hwc = &event->hw;
int idx = hwc->idx;
if (WARN_ON_ONCE(idx == -1))
return;
if (flags & PERF_EF_RELOAD)
WARN_ON_ONCE(!(hwc->state & PERF_HES_UPTODATE));
hwc->state = 0;
cpwcr(HPCNTENR, BIT(idx) | cprcr(HPCNTENR));
}
static void csky_pmu_stop(struct perf_event *event, int flags)
{
struct hw_perf_event *hwc = &event->hw;
int idx = hwc->idx;
if (!(event->hw.state & PERF_HES_STOPPED)) {
cpwcr(HPCNTENR, ~BIT(idx) & cprcr(HPCNTENR));
event->hw.state |= PERF_HES_STOPPED;
}
if ((flags & PERF_EF_UPDATE) &&
!(event->hw.state & PERF_HES_UPTODATE)) {
csky_perf_event_update(event, &event->hw);
event->hw.state |= PERF_HES_UPTODATE;
}
}
static void csky_pmu_del(struct perf_event *event, int flags)
{
csky_pmu_stop(event, PERF_EF_UPDATE);
perf_event_update_userpage(event);
}
/* allocate hardware counter and optionally start counting */
static int csky_pmu_add(struct perf_event *event, int flags)
{
struct hw_perf_event *hwc = &event->hw;
local64_set(&hwc->prev_count, 0);
if (hw_raw_write_mapping[hwc->idx] != NULL)
hw_raw_write_mapping[hwc->idx](0);
hwc->state = PERF_HES_UPTODATE | PERF_HES_STOPPED;
if (flags & PERF_EF_START)
csky_pmu_start(event, PERF_EF_RELOAD);
perf_event_update_userpage(event);
return 0;
}
int __init init_hw_perf_events(void)
{
csky_pmu.pmu = (struct pmu) {
.pmu_enable = csky_pmu_enable,
.pmu_disable = csky_pmu_disable,
.event_init = csky_pmu_event_init,
.add = csky_pmu_add,
.del = csky_pmu_del,
.start = csky_pmu_start,
.stop = csky_pmu_stop,
.read = csky_pmu_read,
};
memset((void *)hw_raw_read_mapping, 0,
sizeof(hw_raw_read_mapping[CSKY_PMU_MAX_EVENTS]));
hw_raw_read_mapping[0x1] = csky_pmu_read_cc;
hw_raw_read_mapping[0x2] = csky_pmu_read_ic;
hw_raw_read_mapping[0x3] = csky_pmu_read_icac;
hw_raw_read_mapping[0x4] = csky_pmu_read_icmc;
hw_raw_read_mapping[0x5] = csky_pmu_read_dcac;
hw_raw_read_mapping[0x6] = csky_pmu_read_dcmc;
hw_raw_read_mapping[0x7] = csky_pmu_read_l2ac;
hw_raw_read_mapping[0x8] = csky_pmu_read_l2mc;
hw_raw_read_mapping[0xa] = csky_pmu_read_iutlbmc;
hw_raw_read_mapping[0xb] = csky_pmu_read_dutlbmc;
hw_raw_read_mapping[0xc] = csky_pmu_read_jtlbmc;
hw_raw_read_mapping[0xd] = csky_pmu_read_softc;
hw_raw_read_mapping[0xe] = csky_pmu_read_cbmc;
hw_raw_read_mapping[0xf] = csky_pmu_read_cbic;
hw_raw_read_mapping[0x10] = csky_pmu_read_ibmc;
hw_raw_read_mapping[0x11] = csky_pmu_read_ibic;
hw_raw_read_mapping[0x12] = csky_pmu_read_lsfc;
hw_raw_read_mapping[0x13] = csky_pmu_read_sic;
hw_raw_read_mapping[0x14] = csky_pmu_read_dcrac;
hw_raw_read_mapping[0x15] = csky_pmu_read_dcrmc;
hw_raw_read_mapping[0x16] = csky_pmu_read_dcwac;
hw_raw_read_mapping[0x17] = csky_pmu_read_dcwmc;
hw_raw_read_mapping[0x18] = csky_pmu_read_l2rac;
hw_raw_read_mapping[0x19] = csky_pmu_read_l2rmc;
hw_raw_read_mapping[0x1a] = csky_pmu_read_l2wac;
hw_raw_read_mapping[0x1b] = csky_pmu_read_l2wmc;
memset((void *)hw_raw_write_mapping, 0,
sizeof(hw_raw_write_mapping[CSKY_PMU_MAX_EVENTS]));
hw_raw_write_mapping[0x1] = csky_pmu_write_cc;
hw_raw_write_mapping[0x2] = csky_pmu_write_ic;
hw_raw_write_mapping[0x3] = csky_pmu_write_icac;
hw_raw_write_mapping[0x4] = csky_pmu_write_icmc;
hw_raw_write_mapping[0x5] = csky_pmu_write_dcac;
hw_raw_write_mapping[0x6] = csky_pmu_write_dcmc;
hw_raw_write_mapping[0x7] = csky_pmu_write_l2ac;
hw_raw_write_mapping[0x8] = csky_pmu_write_l2mc;
hw_raw_write_mapping[0xa] = csky_pmu_write_iutlbmc;
hw_raw_write_mapping[0xb] = csky_pmu_write_dutlbmc;
hw_raw_write_mapping[0xc] = csky_pmu_write_jtlbmc;
hw_raw_write_mapping[0xd] = csky_pmu_write_softc;
hw_raw_write_mapping[0xe] = csky_pmu_write_cbmc;
hw_raw_write_mapping[0xf] = csky_pmu_write_cbic;
hw_raw_write_mapping[0x10] = csky_pmu_write_ibmc;
hw_raw_write_mapping[0x11] = csky_pmu_write_ibic;
hw_raw_write_mapping[0x12] = csky_pmu_write_lsfc;
hw_raw_write_mapping[0x13] = csky_pmu_write_sic;
hw_raw_write_mapping[0x14] = csky_pmu_write_dcrac;
hw_raw_write_mapping[0x15] = csky_pmu_write_dcrmc;
hw_raw_write_mapping[0x16] = csky_pmu_write_dcwac;
hw_raw_write_mapping[0x17] = csky_pmu_write_dcwmc;
hw_raw_write_mapping[0x18] = csky_pmu_write_l2rac;
hw_raw_write_mapping[0x19] = csky_pmu_write_l2rmc;
hw_raw_write_mapping[0x1a] = csky_pmu_write_l2wac;
hw_raw_write_mapping[0x1b] = csky_pmu_write_l2wmc;
csky_pmu.pmu.capabilities |= PERF_PMU_CAP_NO_INTERRUPT;
cpwcr(HPCR, BIT(31) | BIT(30) | BIT(1));
return perf_pmu_register(&csky_pmu.pmu, "cpu", PERF_TYPE_RAW);
}
arch_initcall(init_hw_perf_events);
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