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