115 lines
3.5 KiB
C
115 lines
3.5 KiB
C
/*
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* Cell Broadband Engine OProfile Support
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*
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* (C) Copyright IBM Corporation 2006
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*
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* Author: Maynard Johnson <maynardj@us.ibm.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef PR_UTIL_H
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#define PR_UTIL_H
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#include <linux/cpumask.h>
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#include <linux/oprofile.h>
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#include <asm/cell-pmu.h>
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#include <asm/cell-regs.h>
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#include <asm/spu.h>
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/* Defines used for sync_start */
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#define SKIP_GENERIC_SYNC 0
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#define SYNC_START_ERROR -1
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#define DO_GENERIC_SYNC 1
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#define SPUS_PER_NODE 8
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#define DEFAULT_TIMER_EXPIRE (HZ / 10)
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extern struct delayed_work spu_work;
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extern int spu_prof_running;
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#define TRACE_ARRAY_SIZE 1024
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extern spinlock_t oprof_spu_smpl_arry_lck;
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struct spu_overlay_info { /* map of sections within an SPU overlay */
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unsigned int vma; /* SPU virtual memory address from elf */
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unsigned int size; /* size of section from elf */
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unsigned int offset; /* offset of section into elf file */
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unsigned int buf;
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};
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struct vma_to_fileoffset_map { /* map of sections within an SPU program */
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struct vma_to_fileoffset_map *next; /* list pointer */
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unsigned int vma; /* SPU virtual memory address from elf */
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unsigned int size; /* size of section from elf */
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unsigned int offset; /* offset of section into elf file */
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unsigned int guard_ptr;
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unsigned int guard_val;
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/*
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* The guard pointer is an entry in the _ovly_buf_table,
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* computed using ovly.buf as the index into the table. Since
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* ovly.buf values begin at '1' to reference the first (or 0th)
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* entry in the _ovly_buf_table, the computation subtracts 1
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* from ovly.buf.
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* The guard value is stored in the _ovly_buf_table entry and
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* is an index (starting at 1) back to the _ovly_table entry
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* that is pointing at this _ovly_buf_table entry. So, for
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* example, for an overlay scenario with one overlay segment
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* and two overlay sections:
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* - Section 1 points to the first entry of the
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* _ovly_buf_table, which contains a guard value
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* of '1', referencing the first (index=0) entry of
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* _ovly_table.
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* - Section 2 points to the second entry of the
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* _ovly_buf_table, which contains a guard value
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* of '2', referencing the second (index=1) entry of
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* _ovly_table.
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*/
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};
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struct spu_buffer {
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int last_guard_val;
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int ctx_sw_seen;
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unsigned long *buff;
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unsigned int head, tail;
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};
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/* The three functions below are for maintaining and accessing
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* the vma-to-fileoffset map.
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*/
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struct vma_to_fileoffset_map *create_vma_map(const struct spu *spu,
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unsigned long objectid);
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unsigned int vma_map_lookup(struct vma_to_fileoffset_map *map,
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unsigned int vma, const struct spu *aSpu,
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int *grd_val);
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void vma_map_free(struct vma_to_fileoffset_map *map);
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/*
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* Entry point for SPU profiling.
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* cycles_reset is the SPU_CYCLES count value specified by the user.
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*/
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int start_spu_profiling_cycles(unsigned int cycles_reset);
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void start_spu_profiling_events(void);
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void stop_spu_profiling_cycles(void);
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void stop_spu_profiling_events(void);
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/* add the necessary profiling hooks */
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int spu_sync_start(void);
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/* remove the hooks */
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int spu_sync_stop(void);
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/* Record SPU program counter samples to the oprofile event buffer. */
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void spu_sync_buffer(int spu_num, unsigned int *samples,
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int num_samples);
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void set_spu_profiling_frequency(unsigned int freq_khz, unsigned int cycles_reset);
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#endif /* PR_UTIL_H */
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