260 lines
9.6 KiB
C
260 lines
9.6 KiB
C
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/*
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* Copyright (C) 2001-2003 Hewlett-Packard Co
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* Stephane Eranian <eranian@hpl.hp.com>
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*/
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#ifndef _ASM_IA64_PERFMON_H
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#define _ASM_IA64_PERFMON_H
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/*
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* perfmon comamnds supported on all CPU models
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*/
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#define PFM_WRITE_PMCS 0x01
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#define PFM_WRITE_PMDS 0x02
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#define PFM_READ_PMDS 0x03
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#define PFM_STOP 0x04
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#define PFM_START 0x05
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#define PFM_ENABLE 0x06 /* obsolete */
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#define PFM_DISABLE 0x07 /* obsolete */
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#define PFM_CREATE_CONTEXT 0x08
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#define PFM_DESTROY_CONTEXT 0x09 /* obsolete use close() */
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#define PFM_RESTART 0x0a
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#define PFM_PROTECT_CONTEXT 0x0b /* obsolete */
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#define PFM_GET_FEATURES 0x0c
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#define PFM_DEBUG 0x0d
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#define PFM_UNPROTECT_CONTEXT 0x0e /* obsolete */
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#define PFM_GET_PMC_RESET_VAL 0x0f
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#define PFM_LOAD_CONTEXT 0x10
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#define PFM_UNLOAD_CONTEXT 0x11
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/*
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* PMU model specific commands (may not be supported on all PMU models)
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*/
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#define PFM_WRITE_IBRS 0x20
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#define PFM_WRITE_DBRS 0x21
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/*
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* context flags
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*/
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#define PFM_FL_NOTIFY_BLOCK 0x01 /* block task on user level notifications */
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#define PFM_FL_SYSTEM_WIDE 0x02 /* create a system wide context */
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#define PFM_FL_OVFL_NO_MSG 0x80 /* do not post overflow/end messages for notification */
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/*
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* event set flags
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*/
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#define PFM_SETFL_EXCL_IDLE 0x01 /* exclude idle task (syswide only) XXX: DO NOT USE YET */
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/*
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* PMC flags
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*/
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#define PFM_REGFL_OVFL_NOTIFY 0x1 /* send notification on overflow */
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#define PFM_REGFL_RANDOM 0x2 /* randomize sampling interval */
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/*
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* PMD/PMC/IBR/DBR return flags (ignored on input)
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*
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* Those flags are used on output and must be checked in case EAGAIN is returned
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* by any of the calls using a pfarg_reg_t or pfarg_dbreg_t structure.
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*/
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#define PFM_REG_RETFL_NOTAVAIL (1UL<<31) /* set if register is implemented but not available */
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#define PFM_REG_RETFL_EINVAL (1UL<<30) /* set if register entry is invalid */
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#define PFM_REG_RETFL_MASK (PFM_REG_RETFL_NOTAVAIL|PFM_REG_RETFL_EINVAL)
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#define PFM_REG_HAS_ERROR(flag) (((flag) & PFM_REG_RETFL_MASK) != 0)
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typedef unsigned char pfm_uuid_t[16]; /* custom sampling buffer identifier type */
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/*
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* Request structure used to define a context
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*/
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typedef struct {
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pfm_uuid_t ctx_smpl_buf_id; /* which buffer format to use (if needed) */
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unsigned long ctx_flags; /* noblock/block */
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unsigned short ctx_nextra_sets; /* number of extra event sets (you always get 1) */
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unsigned short ctx_reserved1; /* for future use */
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int ctx_fd; /* return arg: unique identification for context */
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void *ctx_smpl_vaddr; /* return arg: virtual address of sampling buffer, is used */
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unsigned long ctx_reserved2[11];/* for future use */
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} pfarg_context_t;
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/*
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* Request structure used to write/read a PMC or PMD
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*/
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typedef struct {
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unsigned int reg_num; /* which register */
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unsigned short reg_set; /* event set for this register */
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unsigned short reg_reserved1; /* for future use */
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unsigned long reg_value; /* initial pmc/pmd value */
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unsigned long reg_flags; /* input: pmc/pmd flags, return: reg error */
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unsigned long reg_long_reset; /* reset after buffer overflow notification */
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unsigned long reg_short_reset; /* reset after counter overflow */
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unsigned long reg_reset_pmds[4]; /* which other counters to reset on overflow */
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unsigned long reg_random_seed; /* seed value when randomization is used */
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unsigned long reg_random_mask; /* bitmask used to limit random value */
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unsigned long reg_last_reset_val;/* return: PMD last reset value */
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unsigned long reg_smpl_pmds[4]; /* which pmds are accessed when PMC overflows */
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unsigned long reg_smpl_eventid; /* opaque sampling event identifier */
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unsigned long reg_reserved2[3]; /* for future use */
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} pfarg_reg_t;
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typedef struct {
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unsigned int dbreg_num; /* which debug register */
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unsigned short dbreg_set; /* event set for this register */
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unsigned short dbreg_reserved1; /* for future use */
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unsigned long dbreg_value; /* value for debug register */
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unsigned long dbreg_flags; /* return: dbreg error */
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unsigned long dbreg_reserved2[1]; /* for future use */
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} pfarg_dbreg_t;
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typedef struct {
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unsigned int ft_version; /* perfmon: major [16-31], minor [0-15] */
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unsigned int ft_reserved; /* reserved for future use */
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unsigned long reserved[4]; /* for future use */
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} pfarg_features_t;
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typedef struct {
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pid_t load_pid; /* process to load the context into */
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unsigned short load_set; /* first event set to load */
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unsigned short load_reserved1; /* for future use */
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unsigned long load_reserved2[3]; /* for future use */
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} pfarg_load_t;
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typedef struct {
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int msg_type; /* generic message header */
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int msg_ctx_fd; /* generic message header */
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unsigned long msg_ovfl_pmds[4]; /* which PMDs overflowed */
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unsigned short msg_active_set; /* active set at the time of overflow */
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unsigned short msg_reserved1; /* for future use */
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unsigned int msg_reserved2; /* for future use */
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unsigned long msg_tstamp; /* for perf tuning/debug */
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} pfm_ovfl_msg_t;
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typedef struct {
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int msg_type; /* generic message header */
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int msg_ctx_fd; /* generic message header */
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unsigned long msg_tstamp; /* for perf tuning */
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} pfm_end_msg_t;
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typedef struct {
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int msg_type; /* type of the message */
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int msg_ctx_fd; /* unique identifier for the context */
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unsigned long msg_tstamp; /* for perf tuning */
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} pfm_gen_msg_t;
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#define PFM_MSG_OVFL 1 /* an overflow happened */
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#define PFM_MSG_END 2 /* task to which context was attached ended */
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typedef union {
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pfm_ovfl_msg_t pfm_ovfl_msg;
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pfm_end_msg_t pfm_end_msg;
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pfm_gen_msg_t pfm_gen_msg;
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} pfm_msg_t;
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/*
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* Define the version numbers for both perfmon as a whole and the sampling buffer format.
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*/
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#define PFM_VERSION_MAJ 2U
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#define PFM_VERSION_MIN 0U
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#define PFM_VERSION (((PFM_VERSION_MAJ&0xffff)<<16)|(PFM_VERSION_MIN & 0xffff))
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#define PFM_VERSION_MAJOR(x) (((x)>>16) & 0xffff)
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#define PFM_VERSION_MINOR(x) ((x) & 0xffff)
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/*
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* miscellaneous architected definitions
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*/
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#define PMU_FIRST_COUNTER 4 /* first counting monitor (PMC/PMD) */
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#define PMU_MAX_PMCS 256 /* maximum architected number of PMC registers */
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#define PMU_MAX_PMDS 256 /* maximum architected number of PMD registers */
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#ifdef __KERNEL__
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extern long perfmonctl(int fd, int cmd, void *arg, int narg);
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extern void pfm_save_regs (struct task_struct *);
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extern void pfm_load_regs (struct task_struct *);
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extern void pfm_exit_thread(struct task_struct *);
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extern int pfm_use_debug_registers(struct task_struct *);
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extern int pfm_release_debug_registers(struct task_struct *);
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extern void pfm_syst_wide_update_task(struct task_struct *, unsigned long info, int is_ctxswin);
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extern void pfm_inherit(struct task_struct *task, struct pt_regs *regs);
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extern void pfm_init_percpu(void);
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extern void pfm_handle_work(void);
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/*
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* Reset PMD register flags
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*/
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#define PFM_PMD_SHORT_RESET 0
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#define PFM_PMD_LONG_RESET 1
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typedef union {
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unsigned int val;
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struct {
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unsigned int notify_user:1; /* notify user program of overflow */
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unsigned int reset_ovfl_pmds:1; /* reset overflowed PMDs */
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unsigned int block_task:1; /* block monitored task on kernel exit */
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unsigned int mask_monitoring:1; /* mask monitors via PMCx.plm */
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unsigned int reserved:28; /* for future use */
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} bits;
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} pfm_ovfl_ctrl_t;
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typedef struct {
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unsigned char ovfl_pmd; /* index of overflowed PMD */
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unsigned char ovfl_notify; /* =1 if monitor requested overflow notification */
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unsigned short active_set; /* event set active at the time of the overflow */
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pfm_ovfl_ctrl_t ovfl_ctrl; /* return: perfmon controls to set by handler */
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unsigned long pmd_last_reset; /* last reset value of of the PMD */
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unsigned long smpl_pmds[4]; /* bitmask of other PMD of interest on overflow */
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unsigned long smpl_pmds_values[PMU_MAX_PMDS]; /* values for the other PMDs of interest */
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unsigned long pmd_value; /* current 64-bit value of the PMD */
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unsigned long pmd_eventid; /* eventid associated with PMD */
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} pfm_ovfl_arg_t;
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typedef struct {
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char *fmt_name;
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pfm_uuid_t fmt_uuid;
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size_t fmt_arg_size;
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unsigned long fmt_flags;
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int (*fmt_validate)(struct task_struct *task, unsigned int flags, int cpu, void *arg);
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int (*fmt_getsize)(struct task_struct *task, unsigned int flags, int cpu, void *arg, unsigned long *size);
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int (*fmt_init)(struct task_struct *task, void *buf, unsigned int flags, int cpu, void *arg);
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int (*fmt_handler)(struct task_struct *task, void *buf, pfm_ovfl_arg_t *arg, struct pt_regs *regs, unsigned long stamp);
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int (*fmt_restart)(struct task_struct *task, pfm_ovfl_ctrl_t *ctrl, void *buf, struct pt_regs *regs);
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int (*fmt_restart_active)(struct task_struct *task, pfm_ovfl_ctrl_t *ctrl, void *buf, struct pt_regs *regs);
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int (*fmt_exit)(struct task_struct *task, void *buf, struct pt_regs *regs);
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struct list_head fmt_list;
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} pfm_buffer_fmt_t;
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extern int pfm_register_buffer_fmt(pfm_buffer_fmt_t *fmt);
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extern int pfm_unregister_buffer_fmt(pfm_uuid_t uuid);
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/*
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* perfmon interface exported to modules
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*/
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extern int pfm_mod_read_pmds(struct task_struct *, void *req, unsigned int nreq, struct pt_regs *regs);
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extern int pfm_mod_write_pmcs(struct task_struct *, void *req, unsigned int nreq, struct pt_regs *regs);
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extern int pfm_mod_write_ibrs(struct task_struct *task, void *req, unsigned int nreq, struct pt_regs *regs);
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extern int pfm_mod_write_dbrs(struct task_struct *task, void *req, unsigned int nreq, struct pt_regs *regs);
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/*
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* describe the content of the local_cpu_date->pfm_syst_info field
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*/
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#define PFM_CPUINFO_SYST_WIDE 0x1 /* if set a system wide session exists */
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#define PFM_CPUINFO_DCR_PP 0x2 /* if set the system wide session has started */
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#define PFM_CPUINFO_EXCL_IDLE 0x4 /* the system wide session excludes the idle task */
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#endif /* __KERNEL__ */
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#endif /* _ASM_IA64_PERFMON_H */
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