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Linux/tools/testing/selftests/powerpc/pmu/ebb/ebb.h

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  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 

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