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

INCLUDED FROM

DEFINITIONS

1. pmc_sample_period
2. ebb_enable_pmc_counting

   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 
  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 */