Logo Search packages:      
Sourcecode: linux version File versions  Download package

pr_util.h

 /*
 * Cell Broadband Engine OProfile Support
 *
 * (C) Copyright IBM Corporation 2006
 *
 * Author: Maynard Johnson <maynardj@us.ibm.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#ifndef PR_UTIL_H
#define PR_UTIL_H

#include <linux/cpumask.h>
#include <linux/oprofile.h>
#include <asm/cell-pmu.h>
#include <asm/cell-regs.h>
#include <asm/spu.h>

/* Defines used for sync_start */
#define SKIP_GENERIC_SYNC 0
#define SYNC_START_ERROR -1
#define DO_GENERIC_SYNC 1
#define SPUS_PER_NODE   8
#define DEFAULT_TIMER_EXPIRE  (HZ / 10)

extern struct delayed_work spu_work;
extern int spu_prof_running;

00033 struct spu_overlay_info {     /* map of sections within an SPU overlay */
      unsigned int vma; /* SPU virtual memory address from elf */
      unsigned int size;      /* size of section from elf */
      unsigned int offset;    /* offset of section into elf file */
      unsigned int buf;
};

00040 struct vma_to_fileoffset_map {      /* map of sections within an SPU program */
      struct vma_to_fileoffset_map *next; /* list pointer */
      unsigned int vma; /* SPU virtual memory address from elf */
      unsigned int size;      /* size of section from elf */
      unsigned int offset;    /* offset of section into elf file */
      unsigned int guard_ptr;
      unsigned int guard_val;
        /*
       * The guard pointer is an entry in the _ovly_buf_table,
       * computed using ovly.buf as the index into the table.  Since
       * ovly.buf values begin at '1' to reference the first (or 0th)
       * entry in the _ovly_buf_table, the computation subtracts 1
       * from ovly.buf.
       * The guard value is stored in the _ovly_buf_table entry and
       * is an index (starting at 1) back to the _ovly_table entry
       * that is pointing at this _ovly_buf_table entry.  So, for
       * example, for an overlay scenario with one overlay segment
       * and two overlay sections:
       *      - Section 1 points to the first entry of the
       *        _ovly_buf_table, which contains a guard value
       *        of '1', referencing the first (index=0) entry of
       *        _ovly_table.
       *      - Section 2 points to the second entry of the
       *        _ovly_buf_table, which contains a guard value
       *        of '2', referencing the second (index=1) entry of
       *        _ovly_table.
       */

};

00070 struct spu_buffer {
      int last_guard_val;
      int ctx_sw_seen;
      unsigned long *buff;
      unsigned int head, tail;
};


/* The three functions below are for maintaining and accessing
 * the vma-to-fileoffset map.
 */
struct vma_to_fileoffset_map *create_vma_map(const struct spu *spu,
                                   u64 objectid);
unsigned int vma_map_lookup(struct vma_to_fileoffset_map *map,
                      unsigned int vma, const struct spu *aSpu,
                      int *grd_val);
void vma_map_free(struct vma_to_fileoffset_map *map);

/*
 * Entry point for SPU profiling.
 * cycles_reset is the SPU_CYCLES count value specified by the user.
 */
int start_spu_profiling(unsigned int cycles_reset);

void stop_spu_profiling(void);


/* add the necessary profiling hooks */
int spu_sync_start(void);

/* remove the hooks */
int spu_sync_stop(void);

/* Record SPU program counter samples to the oprofile event buffer. */
void spu_sync_buffer(int spu_num, unsigned int *samples,
                 int num_samples);

void set_spu_profiling_frequency(unsigned int freq_khz, unsigned int cycles_reset);

#endif        /* PR_UTIL_H */

Generated by  Doxygen 1.6.0   Back to index