2 * arch/ubicom32/mach-common/profile.h
3 * Private data for the profile module
5 * (C) Copyright 2009, Ubicom, Inc.
7 * This file is part of the Ubicom32 Linux Kernel Port.
9 * The Ubicom32 Linux Kernel Port is free software: you can redistribute
10 * it and/or modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation, either version 2 of the
12 * License, or (at your option) any later version.
14 * The Ubicom32 Linux Kernel Port is distributed in the hope that it
15 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
16 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
17 * the GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with the Ubicom32 Linux Kernel Port. If not,
21 * see <http://www.gnu.org/licenses/>.
23 * Ubicom32 implementation derived from (with many thanks):
29 #include <linux/types.h>
30 #include <asm/devtree.h>
36 #define PROFILE_MAX_THREADS 16
37 #define PROFILE_MAX_SAMPLES 1024
39 struct profile_sample
;
40 struct oprofile_sample
;
43 * values chosen so all counter values fit in a single UDP packet
45 #define PROFILE_NODE_MAX_COUNTERS 32
47 struct profile_counter
{
48 char name
[PROFILE_COUNTER_NAME_LENGTH
];
53 struct devtree_node dn
;
54 volatile u32_t enabled
; /* Is the profiler enabled to take samples? */
55 volatile u32_t busy
; /* set when the samples are being read by the driver */
56 volatile u32_t rate
; /* What is the sampling rate? */
57 volatile u32_t enabled_threads
; /* which threads were enabled at the last sample time */
58 volatile u32_t hrt
; /* HRT threads */
59 volatile u32_t profiler_thread
; /* thread running the profile sampler */
60 volatile u32_t clocks
; /* system clock timer at last sample */
61 volatile u32_t clock_freq
; /* clock frequency in Hz */
62 volatile u32_t ddr_freq
; /* memory frequency */
63 volatile u32_t cpu_id
; /* chip_id register */
64 volatile u32_t inst_count
[PROFILE_MAX_THREADS
]; /* sampled instruction counts at most recent sample */
65 volatile u32_t stats
[4]; /* contents of the cache statistics counters */
66 volatile u16_t head
; /* sample taker puts samples here */
67 volatile u16_t tail
; /* packet filler takes samples here */
68 volatile u16_t count
; /* number of valid samples */
69 volatile u16_t max_samples
; /* how many samples can be in the samples array */
70 struct profile_sample
*samples
; /* samples array allocated by the linux driver */
71 volatile u32_t num_counters
; /* how many registered performance counters */
72 volatile struct profile_counter counters
[PROFILE_NODE_MAX_COUNTERS
];
74 /* unimplemented interface for future oprofile work */
75 volatile u16_t oprofile_head
; /* sample taker puts samples here */
76 volatile u16_t oprofile_tail
; /* packet filler takes samples here */
77 volatile u16_t oprofile_count
; /* how many oprofile sampels are are in use */
78 volatile u16_t oprofile_max_samples
; /* samples array size for oprofile samples */
79 struct oprofile_sample
*oprofile_samples
; /* oprofile sample buffer */