1/*
2 * Copyright 2014 Tilera Corporation. All Rights Reserved.
3 *
4 *   This program is free software; you can redistribute it and/or
5 *   modify it under the terms of the GNU General Public License
6 *   as published by the Free Software Foundation, version 2.
7 *
8 *   This program is distributed in the hope that it will be useful, but
9 *   WITHOUT ANY WARRANTY; without even the implied warranty of
10 *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
11 *   NON INFRINGEMENT.  See the GNU General Public License for
12 *   more details.
13 */
14
15#ifndef _ASM_TILE_PMC_H
16#define _ASM_TILE_PMC_H
17
18#include <linux/ptrace.h>
19
20#define TILE_BASE_COUNTERS	2
21
22/* Bitfields below are derived from SPR PERF_COUNT_CTL*/
23#ifndef __tilegx__
24/* PERF_COUNT_CTL on TILEPro */
25#define TILE_CTL_EXCL_USER	(1 << 7) /* exclude user level */
26#define TILE_CTL_EXCL_KERNEL	(1 << 8) /* exclude kernel level */
27#define TILE_CTL_EXCL_HV	(1 << 9) /* exclude hypervisor level */
28
29#define TILE_SEL_MASK		0x7f	/* 7 bits for event SEL,
30					COUNT_0_SEL */
31#define TILE_PLM_MASK		0x780	/* 4 bits priv level msks,
32					COUNT_0_MASK*/
33#define TILE_EVENT_MASK	(TILE_SEL_MASK | TILE_PLM_MASK)
34
35#else /* __tilegx__*/
36/* PERF_COUNT_CTL on TILEGx*/
37#define TILE_CTL_EXCL_USER	(1 << 10) /* exclude user level */
38#define TILE_CTL_EXCL_KERNEL	(1 << 11) /* exclude kernel level */
39#define TILE_CTL_EXCL_HV	(1 << 12) /* exclude hypervisor level */
40
41#define TILE_SEL_MASK		0x3f	/* 6 bits for event SEL,
42					COUNT_0_SEL*/
43#define TILE_BOX_MASK		0x1c0	/* 3 bits box msks,
44					COUNT_0_BOX */
45#define TILE_PLM_MASK		0x3c00	/* 4 bits priv level msks,
46					COUNT_0_MASK */
47#define TILE_EVENT_MASK	(TILE_SEL_MASK | TILE_BOX_MASK | TILE_PLM_MASK)
48#endif /* __tilegx__*/
49
50/* Takes register and fault number.  Returns error to disable the interrupt. */
51typedef int (*perf_irq_t)(struct pt_regs *, int);
52
53int userspace_perf_handler(struct pt_regs *regs, int fault);
54
55perf_irq_t reserve_pmc_hardware(perf_irq_t new_perf_irq);
56void release_pmc_hardware(void);
57
58unsigned long pmc_get_overflow(void);
59void pmc_ack_overflow(unsigned long status);
60
61void unmask_pmc_interrupts(void);
62void mask_pmc_interrupts(void);
63
64#endif /* _ASM_TILE_PMC_H */
65