target/linux/ubicom32/files/arch/ubicom32/mach-common/profile.h

   1 /*
   2  * arch/ubicom32/mach-common/profile.h
   3  *   Private data for the profile module
   4  *
   5  * (C) Copyright 2009, Ubicom, Inc.
   6  *
   7  * This file is part of the Ubicom32 Linux Kernel Port.
   8  *
   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.
  13  *
  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.
  18  *
  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/>.
  22  *
  23  * Ubicom32 implementation derived from (with many thanks):
  24  *   arch/m68knommu
  25  *   arch/blackfin
  26  *   arch/parisc
  27  */
  28
  29 #include <linux/types.h>
  30 #include <asm/devtree.h>
  31 #include "profpkt.h"
  32
  33 #ifndef _PROFILE_H_
  34 #define _PROFILE_H_
  35
  36 #define PROFILE_MAX_THREADS 16
  37 #define PROFILE_MAX_SAMPLES 1024
  38
  39 struct profile_sample;
  40 struct oprofile_sample;
  41
  42 /*
  43  * values chosen so all counter values fit in a single UDP packet
  44  */
  45 #define PROFILE_NODE_MAX_COUNTERS 32
  46
  47 struct profile_counter {
  48         char name[PROFILE_COUNTER_NAME_LENGTH];
  49         unsigned int value;
  50 };
  51
  52 struct profilenode {
  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];
  73
  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 */
  80 };
  81
  82 #endif