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New kernel events can be added at various location for sampling or counting. This will for example allow easy system profiling whatever the processor is with known tools like pmcstat(8). Simultaneous usage of software PMC and hardware PMC is possible, for example looking at the lock acquire failure, page fault while sampling on instructions. Sponsored by: NETASQ MFC after: 1 month
81 lines
1.8 KiB
C
81 lines
1.8 KiB
C
/*-
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* This file is in the public domain.
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*
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* from: src/sys/alpha/include/pmc_mdep.h,v 1.2 2005/06/09 19:45:06 jkoshy
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* $FreeBSD$
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*/
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#ifndef _MACHINE_PMC_MDEP_H_
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#define _MACHINE_PMC_MDEP_H_
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#define PMC_MDEP_CLASS_INDEX_MIPS 1
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union pmc_md_op_pmcallocate {
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uint64_t __pad[4];
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};
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/* Logging */
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#if defined(__mips_n64)
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#define PMCLOG_READADDR PMCLOG_READ64
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#define PMCLOG_EMITADDR PMCLOG_EMIT64
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#else
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#define PMCLOG_READADDR PMCLOG_READ32
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#define PMCLOG_EMITADDR PMCLOG_EMIT32
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#endif
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#if _KERNEL
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/*
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* MIPS event codes are encoded with a select bit. The
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* select bit is used when writing to CP0 so that we
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* can select either counter 0/2 or 1/3. The cycle
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* and instruction counters are special in that they
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* can be counted on either 0/2 or 1/3.
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*/
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#define MIPS_CTR_ALL 255 /* Count events in any counter. */
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#define MIPS_CTR_0 0 /* Counter 0 Event */
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#define MIPS_CTR_1 1 /* Counter 1 Event */
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struct mips_event_code_map {
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uint32_t pe_ev; /* enum value */
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uint8_t pe_counter; /* Which counter this can be counted in. */
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uint8_t pe_code; /* numeric code */
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};
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struct mips_pmc_spec {
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uint32_t ps_cpuclass;
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uint32_t ps_cputype;
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uint32_t ps_capabilities;
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int ps_counter_width;
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};
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union pmc_md_pmc {
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uint32_t pm_mips_evsel;
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};
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#define PMC_TRAPFRAME_TO_PC(TF) ((TF)->pc)
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extern const struct mips_event_code_map mips_event_codes[];
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extern const int mips_event_codes_size;
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extern int mips_npmcs;
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extern struct mips_pmc_spec mips_pmc_spec;
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/*
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* Prototypes
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*/
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struct pmc_mdep *pmc_mips_initialize(void);
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void pmc_mips_finalize(struct pmc_mdep *_md);
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/*
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* CPU-specific functions
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*/
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uint32_t mips_get_perfctl(int cpu, int ri, uint32_t event, uint32_t caps);
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uint64_t mips_pmcn_read(unsigned int pmc);
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uint64_t mips_pmcn_write(unsigned int pmc, uint64_t v);
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#endif /* _KERNEL */
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#endif /* !_MACHINE_PMC_MDEP_H_ */
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