ebb.h (1813B)
1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * Copyright 2014, Michael Ellerman, IBM Corp. 4 */ 5 6#ifndef _SELFTESTS_POWERPC_PMU_EBB_EBB_H 7#define _SELFTESTS_POWERPC_PMU_EBB_EBB_H 8 9#include "../event.h" 10#include "../lib.h" 11#include "trace.h" 12#include "reg.h" 13 14#define PMC_INDEX(pmc) ((pmc)-1) 15 16#define NUM_PMC_VALUES 128 17 18struct ebb_state 19{ 20 struct { 21 u64 pmc_count[6]; 22 volatile int ebb_count; 23 int spurious; 24 int negative; 25 int no_overflow; 26 } stats; 27 28 bool pmc_enable[6]; 29 struct trace_buffer *trace; 30}; 31 32extern struct ebb_state ebb_state; 33 34#define COUNTER_OVERFLOW 0x80000000ull 35 36static inline uint32_t pmc_sample_period(uint32_t value) 37{ 38 return COUNTER_OVERFLOW - value; 39} 40 41static inline void ebb_enable_pmc_counting(int pmc) 42{ 43 ebb_state.pmc_enable[PMC_INDEX(pmc)] = true; 44} 45 46bool ebb_check_count(int pmc, u64 sample_period, int fudge); 47void event_leader_ebb_init(struct event *e); 48void event_ebb_init(struct event *e); 49void event_bhrb_init(struct event *e, unsigned ifm); 50void setup_ebb_handler(void (*callee)(void)); 51void standard_ebb_callee(void); 52int ebb_event_enable(struct event *e); 53void ebb_global_enable(void); 54void ebb_global_disable(void); 55bool ebb_is_supported(void); 56void ebb_freeze_pmcs(void); 57void ebb_unfreeze_pmcs(void); 58int count_pmc(int pmc, uint32_t sample_period); 59void dump_ebb_state(void); 60void dump_summary_ebb_state(void); 61void dump_ebb_hw_state(void); 62void clear_ebb_stats(void); 63void write_pmc(int pmc, u64 value); 64u64 read_pmc(int pmc); 65void reset_ebb_with_clear_mask(unsigned long mmcr0_clear_mask); 66void reset_ebb(void); 67int ebb_check_mmcr0(void); 68 69extern u64 sample_period; 70 71int core_busy_loop(void); 72int ebb_child(union pipe read_pipe, union pipe write_pipe); 73int catch_sigill(void (*func)(void)); 74void write_pmc1(void); 75 76#endif /* _SELFTESTS_POWERPC_PMU_EBB_EBB_H */