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
  11 extern long perfmonctl(int fd, int cmd, void *arg, int narg);
  12
  13 typedef struct {
  14         void (*handler)(int irq, void *arg, struct pt_regs *regs);
  15 } pfm_intr_handler_desc_t;
  16
  17 extern void pfm_save_regs (struct task_struct *);
  18 extern void pfm_load_regs (struct task_struct *);
  19
  20 extern void pfm_exit_thread(struct task_struct *);
  21 extern int  pfm_use_debug_registers(struct task_struct *);
  22 extern int  pfm_release_debug_registers(struct task_struct *);
  23 extern void pfm_syst_wide_update_task(struct task_struct *, unsigned long info, int is_ctxswin);
  24 extern void pfm_inherit(struct task_struct *task, struct pt_regs *regs);
  25 extern void pfm_init_percpu(void);
  26 extern void pfm_handle_work(void);
  27 extern int  pfm_install_alt_pmu_interrupt(pfm_intr_handler_desc_t *h);
  28 extern 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
  38 typedef 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
  49 typedef 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
  63 typedef 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
  80 extern int pfm_register_buffer_fmt(pfm_buffer_fmt_t *fmt);
  81 extern int pfm_unregister_buffer_fmt(pfm_uuid_t uuid);
  82
  83 /*
  84  * perfmon interface exported to modules
  85  */
  86 extern int pfm_mod_read_pmds(struct task_struct *, void *req, unsigned int nreq, struct pt_regs *regs);
  87 extern int pfm_mod_write_pmcs(struct task_struct *, void *req, unsigned int nreq, struct pt_regs *regs);
  88 extern int pfm_mod_write_ibrs(struct task_struct *task, void *req, unsigned int nreq, struct pt_regs *regs);
  89 extern 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  */
 101 typedef 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;
 107 extern pfm_sysctl_t pfm_sysctl;
 108
 109
 110 #endif /* _ASM_IA64_PERFMON_H */