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 int count_pmc(int pmc, uint32_t sample_period);
59 void dump_ebb_state(void);
60 void dump_summary_ebb_state(void);
61 void dump_ebb_hw_state(void);
62 void clear_ebb_stats(void);
63 void write_pmc(int pmc, u64 value);
64 u64 read_pmc(int pmc);
65 void reset_ebb_with_clear_mask(unsigned long mmcr0_clear_mask);
66 void reset_ebb(void);
67 int ebb_check_mmcr0(void);
68
69 extern u64 sample_period;
70
71 int core_busy_loop(void);
72 int ebb_child(union pipe read_pipe, union pipe write_pipe);
73 int catch_sigill(void (*func)(void));
74 void write_pmc1(void);
75
76 #endif /* _SELFTESTS_POWERPC_PMU_EBB_EBB_H */
77
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