/*
* Copyright (C) 2001-2003 Hewlett-Packard Co
* Stephane Eranian <[email protected]>
*/
#ifndef _ASM_IA64_PERFMON_H
#define _ASM_IA64_PERFMON_H

#include <uapi/asm/perfmon.h>


extern long perfmonctl(int fd, int cmd, void *arg, int narg);

typedef struct {
void (*handler)(int irq, void *arg, struct pt_regs *regs);
} pfm_intr_handler_desc_t;

extern void pfm_save_regs (struct task_struct *);
extern void pfm_load_regs (struct task_struct *);

extern void pfm_exit_thread(struct task_struct *);
extern int pfm_use_debug_registers(struct task_struct *);
extern int pfm_release_debug_registers(struct task_struct *);
extern void pfm_syst_wide_update_task(struct task_struct *, unsigned long info, int is_ctxswin);
extern void pfm_inherit(struct task_struct *task, struct pt_regs *regs);
extern void pfm_init_percpu(void);
extern void pfm_handle_work(void);
extern int pfm_install_alt_pmu_interrupt(pfm_intr_handler_desc_t *h);
extern int pfm_remove_alt_pmu_interrupt(pfm_intr_handler_desc_t *h);



/*
* Reset PMD register flags
*/
#define PFM_PMD_SHORT_RESET 0
#define PFM_PMD_LONG_RESET 1

typedef union {
unsigned int val;
struct {
unsigned int notify_user:1; /* notify user program of overflow */
unsigned int reset_ovfl_pmds:1; /* reset overflowed PMDs */
unsigned int block_task:1; /* block monitored task on kernel exit */
unsigned int mask_monitoring:1; /* mask monitors via PMCx.plm */
unsigned int reserved:28; /* for future use */
} bits;
} pfm_ovfl_ctrl_t;

typedef struct {
unsigned char ovfl_pmd; /* index of overflowed PMD */
unsigned char ovfl_notify; /* =1 if monitor requested overflow notification */
unsigned short active_set; /* event set active at the time of the overflow */
pfm_ovfl_ctrl_t ovfl_ctrl; /* return: perfmon controls to set by handler */

unsigned long pmd_last_reset; /* last reset value of of the PMD */
unsigned long smpl_pmds[4]; /* bitmask of other PMD of interest on overflow */
unsigned long smpl_pmds_values[PMU_MAX_PMDS]; /* values for the other PMDs of interest */
unsigned long pmd_value; /* current 64-bit value of the PMD */
unsigned long pmd_eventid; /* eventid associated with PMD */
} pfm_ovfl_arg_t;


typedef struct {
char *fmt_name;
pfm_uuid_t fmt_uuid;
size_t fmt_arg_size;
unsigned long fmt_flags;

int (*fmt_validate)(struct task_struct *task, unsigned int flags, int cpu, void *arg);
int (*fmt_getsize)(struct task_struct *task, unsigned int flags, int cpu, void *arg, unsigned long *size);
int (*fmt_init)(struct task_struct *task, void *buf, unsigned int flags, int cpu, void *arg);
int (*fmt_handler)(struct task_struct *task, void *buf, pfm_ovfl_arg_t *arg, struct pt_regs *regs, unsigned long stamp);
int (*fmt_restart)(struct task_struct *task, pfm_ovfl_ctrl_t *ctrl, void *buf, struct pt_regs *regs);
int (*fmt_restart_active)(struct task_struct *task, pfm_ovfl_ctrl_t *ctrl, void *buf, struct pt_regs *regs);
int (*fmt_exit)(struct task_struct *task, void *buf, struct pt_regs *regs);

struct list_head fmt_list;
} pfm_buffer_fmt_t;

extern int pfm_register_buffer_fmt(pfm_buffer_fmt_t *fmt);
extern int pfm_unregister_buffer_fmt(pfm_uuid_t uuid);

/*
* perfmon interface exported to modules
*/
extern int pfm_mod_read_pmds(struct task_struct *, void *req, unsigned int nreq, struct pt_regs *regs);
extern int pfm_mod_write_pmcs(struct task_struct *, void *req, unsigned int nreq, struct pt_regs *regs);
extern int pfm_mod_write_ibrs(struct task_struct *task, void *req, unsigned int nreq, struct pt_regs *regs);
extern int pfm_mod_write_dbrs(struct task_struct *task, void *req, unsigned int nreq, struct pt_regs *regs);

/*
* describe the content of the local_cpu_date->pfm_syst_info field
*/
#define PFM_CPUINFO_SYST_WIDE 0x1 /* if set a system wide session exists */
#define PFM_CPUINFO_DCR_PP 0x2 /* if set the system wide session has started */
#define PFM_CPUINFO_EXCL_IDLE 0x4 /* the system wide session excludes the idle task */

/*
* sysctl control structure. visible to sampling formats
*/
typedef struct {
int debug; /* turn on/off debugging via syslog */
int debug_ovfl; /* turn on/off debug printk in overflow handler */
int fastctxsw; /* turn on/off fast (unsecure) ctxsw */
int expert_mode; /* turn on/off value checking */
} pfm_sysctl_t;
extern pfm_sysctl_t pfm_sysctl;


#endif /* _ASM_IA64_PERFMON_H */