LXR linux/arch/ia64/include/asm/perfmon.h

   1/*
   2 * Copyright (C) 2001-2003 Hewlett-Packard Co
   3 *               Stephane Eranian <eranian@hpl.hp.com>
   4 */
   5#ifndef _ASM_IA64_PERFMON_H
   6#define _ASM_IA64_PERFMON_H
   7
   8#include <uapi/asm/perfmon.h>
   9
  10
  11extern long perfmonctl(int fd, int cmd, void *arg, int narg);
  12
  13typedef struct {
  14        void (*handler)(int irq, void *arg, struct pt_regs *regs);
  15} pfm_intr_handler_desc_t;
  16
  17extern void pfm_save_regs (struct task_struct *);
  18extern void pfm_load_regs (struct task_struct *);
  19
  20extern void pfm_exit_thread(struct task_struct *);
  21extern int  pfm_use_debug_registers(struct task_struct *);
  22extern int  pfm_release_debug_registers(struct task_struct *);
  23extern void pfm_syst_wide_update_task(struct task_struct *, unsigned long info, int is_ctxswin);
  24extern void pfm_inherit(struct task_struct *task, struct pt_regs *regs);
  25extern void pfm_init_percpu(void);
  26extern void pfm_handle_work(void);
  27extern int  pfm_install_alt_pmu_interrupt(pfm_intr_handler_desc_t *h);
  28extern int  pfm_remove_alt_pmu_interrupt(pfm_intr_handler_desc_t *h);
  29
  30
  31
  32/*
  33 * Reset PMD register flags
  34 */
  35#define PFM_PMD_SHORT_RESET     0
  36#define PFM_PMD_LONG_RESET      1
  37
  38typedef union {
  39        unsigned int val;
  40        struct {
  41                unsigned int notify_user:1;     /* notify user program of overflow */
  42                unsigned int reset_ovfl_pmds:1; /* reset overflowed PMDs */
  43                unsigned int block_task:1;      /* block monitored task on kernel exit */
  44                unsigned int mask_monitoring:1; /* mask monitors via PMCx.plm */
  45                unsigned int reserved:28;       /* for future use */
  46        } bits;
  47} pfm_ovfl_ctrl_t;
  48
  49typedef struct {
  50        unsigned char   ovfl_pmd;                       /* index of overflowed PMD  */
  51        unsigned char   ovfl_notify;                    /* =1 if monitor requested overflow notification */
  52        unsigned short  active_set;                     /* event set active at the time of the overflow */
  53        pfm_ovfl_ctrl_t ovfl_ctrl;                      /* return: perfmon controls to set by handler */
  54
  55        unsigned long   pmd_last_reset;                 /* last reset value of of the PMD */
  56        unsigned long   smpl_pmds[4];                   /* bitmask of other PMD of interest on overflow */
  57        unsigned long   smpl_pmds_values[PMU_MAX_PMDS]; /* values for the other PMDs of interest */
  58        unsigned long   pmd_value;                      /* current 64-bit value of the PMD */
  59        unsigned long   pmd_eventid;                    /* eventid associated with PMD */
  60} pfm_ovfl_arg_t;
  61
  62
  63typedef struct {
  64        char            *fmt_name;
  65        pfm_uuid_t      fmt_uuid;
  66        size_t          fmt_arg_size;
  67        unsigned long   fmt_flags;
  68
  69        int             (*fmt_validate)(struct task_struct *task, unsigned int flags, int cpu, void *arg);
  70        int             (*fmt_getsize)(struct task_struct *task, unsigned int flags, int cpu, void *arg, unsigned long *size);
  71        int             (*fmt_init)(struct task_struct *task, void *buf, unsigned int flags, int cpu, void *arg);
  72        int             (*fmt_handler)(struct task_struct *task, void *buf, pfm_ovfl_arg_t *arg, struct pt_regs *regs, unsigned long stamp);
  73        int             (*fmt_restart)(struct task_struct *task, pfm_ovfl_ctrl_t *ctrl, void *buf, struct pt_regs *regs);
  74        int             (*fmt_restart_active)(struct task_struct *task, pfm_ovfl_ctrl_t *ctrl, void *buf, struct pt_regs *regs);
  75        int             (*fmt_exit)(struct task_struct *task, void *buf, struct pt_regs *regs);
  76
  77        struct list_head fmt_list;
  78} pfm_buffer_fmt_t;
  79
  80extern int pfm_register_buffer_fmt(pfm_buffer_fmt_t *fmt);
  81extern int pfm_unregister_buffer_fmt(pfm_uuid_t uuid);
  82
  83/*
  84 * perfmon interface exported to modules
  85 */
  86extern int pfm_mod_read_pmds(struct task_struct *, void *req, unsigned int nreq, struct pt_regs *regs);
  87extern int pfm_mod_write_pmcs(struct task_struct *, void *req, unsigned int nreq, struct pt_regs *regs);
  88extern int pfm_mod_write_ibrs(struct task_struct *task, void *req, unsigned int nreq, struct pt_regs *regs);
  89extern int pfm_mod_write_dbrs(struct task_struct *task, void *req, unsigned int nreq, struct pt_regs *regs);
  90
  91/*
  92 * describe the content of the local_cpu_date->pfm_syst_info field
  93 */
  94#define PFM_CPUINFO_SYST_WIDE   0x1     /* if set a system wide session exists */
  95#define PFM_CPUINFO_DCR_PP      0x2     /* if set the system wide session has started */
  96#define PFM_CPUINFO_EXCL_IDLE   0x4     /* the system wide session excludes the idle task */
  97
  98/*
  99 * sysctl control structure. visible to sampling formats
 100 */
 101typedef struct {
 102        int     debug;          /* turn on/off debugging via syslog */
 103        int     debug_ovfl;     /* turn on/off debug printk in overflow handler */
 104        int     fastctxsw;      /* turn on/off fast (unsecure) ctxsw */
 105        int     expert_mode;    /* turn on/off value checking */
 106} pfm_sysctl_t;
 107extern pfm_sysctl_t pfm_sysctl;
 108
 109
 110#endif /* _ASM_IA64_PERFMON_H */
 111