2 * Cell Broadband Engine OProfile Support
4 * (C) Copyright IBM Corporation 2006
6 * Author: Maynard Johnson <maynardj@us.ibm.com>
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version
11 * 2 of the License, or (at your option) any later version.
17 #include <linux/cpumask.h>
18 #include <linux/oprofile.h>
19 #include <asm/cell-pmu.h>
20 #include <asm/cell-regs.h>
23 /* Defines used for sync_start */
24 #define SKIP_GENERIC_SYNC 0
25 #define SYNC_START_ERROR -1
26 #define DO_GENERIC_SYNC 1
27 #define SPUS_PER_NODE 8
28 #define DEFAULT_TIMER_EXPIRE (HZ / 10)
30 extern struct delayed_work spu_work;
31 extern int spu_prof_running;
33 struct spu_overlay_info { /* map of sections within an SPU overlay */
34 unsigned int vma; /* SPU virtual memory address from elf */
35 unsigned int size; /* size of section from elf */
36 unsigned int offset; /* offset of section into elf file */
40 struct vma_to_fileoffset_map { /* map of sections within an SPU program */
41 struct vma_to_fileoffset_map *next; /* list pointer */
42 unsigned int vma; /* SPU virtual memory address from elf */
43 unsigned int size; /* size of section from elf */
44 unsigned int offset; /* offset of section into elf file */
45 unsigned int guard_ptr;
46 unsigned int guard_val;
48 * The guard pointer is an entry in the _ovly_buf_table,
49 * computed using ovly.buf as the index into the table. Since
50 * ovly.buf values begin at '1' to reference the first (or 0th)
51 * entry in the _ovly_buf_table, the computation subtracts 1
53 * The guard value is stored in the _ovly_buf_table entry and
54 * is an index (starting at 1) back to the _ovly_table entry
55 * that is pointing at this _ovly_buf_table entry. So, for
56 * example, for an overlay scenario with one overlay segment
57 * and two overlay sections:
58 * - Section 1 points to the first entry of the
59 * _ovly_buf_table, which contains a guard value
60 * of '1', referencing the first (index=0) entry of
62 * - Section 2 points to the second entry of the
63 * _ovly_buf_table, which contains a guard value
64 * of '2', referencing the second (index=1) entry of
74 unsigned int head, tail;
78 /* The three functions below are for maintaining and accessing
79 * the vma-to-fileoffset map.
81 struct vma_to_fileoffset_map *create_vma_map(const struct spu *spu,
83 unsigned int vma_map_lookup(struct vma_to_fileoffset_map *map,
84 unsigned int vma, const struct spu *aSpu,
86 void vma_map_free(struct vma_to_fileoffset_map *map);
89 * Entry point for SPU profiling.
90 * cycles_reset is the SPU_CYCLES count value specified by the user.
92 int start_spu_profiling(unsigned int cycles_reset);
94 void stop_spu_profiling(void);
97 /* add the necessary profiling hooks */
98 int spu_sync_start(void);
100 /* remove the hooks */
101 int spu_sync_stop(void);
103 /* Record SPU program counter samples to the oprofile event buffer. */
104 void spu_sync_buffer(int spu_num, unsigned int *samples,
107 void set_spu_profiling_frequency(unsigned int freq_khz, unsigned int cycles_reset);
109 #endif /* PR_UTIL_H */