1 /* 2 * Copyright 2014, Michael Ellerman, IBM Corp. 3 * Licensed under GPLv2. 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 18 struct 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 32 extern struct ebb_state ebb_state; 33 34 #define COUNTER_OVERFLOW 0x80000000ull 35 36 static inline uint32_t pmc_sample_period(uint32_t value) 37 { 38 return COUNTER_OVERFLOW - value; 39 } 40 41 static inline void ebb_enable_pmc_counting(int pmc) 42 { 43 ebb_state.pmc_enable[PMC_INDEX(pmc)] = true; 44 } 45 46 bool ebb_check_count(int pmc, u64 sample_period, int fudge); 47 void event_leader_ebb_init(struct event *e); 48 void event_ebb_init(struct event *e); 49 void event_bhrb_init(struct event *e, unsigned ifm); 50 void setup_ebb_handler(void (*callee)(void)); 51 void standard_ebb_callee(void); 52 int ebb_event_enable(struct event *e); 53 void ebb_global_enable(void); 54 void ebb_global_disable(void); 55 bool ebb_is_supported(void); 56 void ebb_freeze_pmcs(void); 57 void ebb_unfreeze_pmcs(void); 58 void event_ebb_init(struct event *e); 59 void event_leader_ebb_init(struct event *e); 60 int count_pmc(int pmc, uint32_t sample_period); 61 void dump_ebb_state(void); 62 void dump_summary_ebb_state(void); 63 void dump_ebb_hw_state(void); 64 void clear_ebb_stats(void); 65 void write_pmc(int pmc, u64 value); 66 u64 read_pmc(int pmc); 67 void reset_ebb_with_clear_mask(unsigned long mmcr0_clear_mask); 68 void reset_ebb(void); 69 int ebb_check_mmcr0(void); 70 71 extern u64 sample_period; 72 73 int core_busy_loop(void); 74 int ebb_child(union pipe read_pipe, union pipe write_pipe); 75 int catch_sigill(void (*func)(void)); 76 void write_pmc1(void); 77 78 #endif /* _SELFTESTS_POWERPC_PMU_EBB_EBB_H */ 79
