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pr_util.h
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1  /*
2  * Cell Broadband Engine OProfile Support
3  *
4  * (C) Copyright IBM Corporation 2006
5  *
6  * Author: Maynard Johnson <[email protected]>
7  *
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.
12  */
13 
14 #ifndef PR_UTIL_H
15 #define PR_UTIL_H
16 
17 #include <linux/cpumask.h>
18 #include <linux/oprofile.h>
19 #include <asm/cell-pmu.h>
20 #include <asm/cell-regs.h>
21 #include <asm/spu.h>
22 
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)
29 
30 extern struct delayed_work spu_work;
31 extern int spu_prof_running;
32 
33 #define TRACE_ARRAY_SIZE 1024
34 
36 
37 struct spu_overlay_info { /* map of sections within an SPU overlay */
38  unsigned int vma; /* SPU virtual memory address from elf */
39  unsigned int size; /* size of section from elf */
40  unsigned int offset; /* offset of section into elf file */
41  unsigned int buf;
42 };
43 
44 struct vma_to_fileoffset_map { /* map of sections within an SPU program */
45  struct vma_to_fileoffset_map *next; /* list pointer */
46  unsigned int vma; /* SPU virtual memory address from elf */
47  unsigned int size; /* size of section from elf */
48  unsigned int offset; /* offset of section into elf file */
49  unsigned int guard_ptr;
50  unsigned int guard_val;
51  /*
52  * The guard pointer is an entry in the _ovly_buf_table,
53  * computed using ovly.buf as the index into the table. Since
54  * ovly.buf values begin at '1' to reference the first (or 0th)
55  * entry in the _ovly_buf_table, the computation subtracts 1
56  * from ovly.buf.
57  * The guard value is stored in the _ovly_buf_table entry and
58  * is an index (starting at 1) back to the _ovly_table entry
59  * that is pointing at this _ovly_buf_table entry. So, for
60  * example, for an overlay scenario with one overlay segment
61  * and two overlay sections:
62  * - Section 1 points to the first entry of the
63  * _ovly_buf_table, which contains a guard value
64  * of '1', referencing the first (index=0) entry of
65  * _ovly_table.
66  * - Section 2 points to the second entry of the
67  * _ovly_buf_table, which contains a guard value
68  * of '2', referencing the second (index=1) entry of
69  * _ovly_table.
70  */
71 
72 };
73 
74 struct spu_buffer {
77  unsigned long *buff;
78  unsigned int head, tail;
79 };
80 
81 
82 /* The three functions below are for maintaining and accessing
83  * the vma-to-fileoffset map.
84  */
85 struct vma_to_fileoffset_map *create_vma_map(const struct spu *spu,
86  unsigned long objectid);
87 unsigned int vma_map_lookup(struct vma_to_fileoffset_map *map,
88  unsigned int vma, const struct spu *aSpu,
89  int *grd_val);
91 
92 /*
93  * Entry point for SPU profiling.
94  * cycles_reset is the SPU_CYCLES count value specified by the user.
95  */
96 int start_spu_profiling_cycles(unsigned int cycles_reset);
98 
99 void stop_spu_profiling_cycles(void);
100 void stop_spu_profiling_events(void);
101 
102 /* add the necessary profiling hooks */
103 int spu_sync_start(void);
104 
105 /* remove the hooks */
106 int spu_sync_stop(void);
107 
108 /* Record SPU program counter samples to the oprofile event buffer. */
109 void spu_sync_buffer(int spu_num, unsigned int *samples,
110  int num_samples);
111 
112 void set_spu_profiling_frequency(unsigned int freq_khz, unsigned int cycles_reset);
113 
114 #endif /* PR_UTIL_H */