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1/*
2 * header file for hardware trace functions
3 *
4 * Copyright 2007-2008 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2 or later.
7 */
8
9#ifndef _BLACKFIN_TRACE_
10#define _BLACKFIN_TRACE_
11
12/* Normally, we use ON, but you can't turn on software expansion until
13 * interrupts subsystem is ready
14 */
15
16#define BFIN_TRACE_INIT ((CONFIG_DEBUG_BFIN_HWTRACE_COMPRESSION << 4) | 0x03)
17#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
18#define BFIN_TRACE_ON (BFIN_TRACE_INIT | (CONFIG_DEBUG_BFIN_HWTRACE_EXPAND << 2))
19#else
20#define BFIN_TRACE_ON (BFIN_TRACE_INIT)
21#endif
22
23#ifndef __ASSEMBLY__
24extern unsigned long trace_buff_offset;
25extern unsigned long software_trace_buff[];
26#if defined(CONFIG_DEBUG_VERBOSE)
27extern void decode_address(char *buf, unsigned long address);
28extern bool get_instruction(unsigned int *val, unsigned short *address);
29#else
30static inline void decode_address(char *buf, unsigned long address) { }
31static inline bool get_instruction(unsigned int *val, unsigned short *address) { return false; }
32#endif
33
34/* Trace Macros for C files */
35
36#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
37
38#define trace_buffer_init() bfin_write_TBUFCTL(BFIN_TRACE_INIT)
39
40#define trace_buffer_save(x) \
41 do { \
42 (x) = bfin_read_TBUFCTL(); \
43 bfin_write_TBUFCTL((x) & ~TBUFEN); \
44 } while (0)
45
46#define trace_buffer_restore(x) \
47 do { \
48 bfin_write_TBUFCTL((x)); \
49 } while (0)
50#else /* DEBUG_BFIN_HWTRACE_ON */
51
52#define trace_buffer_save(x)
53#define trace_buffer_restore(x)
54#endif /* CONFIG_DEBUG_BFIN_HWTRACE_ON */
55
56#else
57/* Trace Macros for Assembly files */
58
59#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
60
61#define trace_buffer_stop(preg, dreg) \
62 preg.L = LO(TBUFCTL); \
63 preg.H = HI(TBUFCTL); \
64 dreg = 0x1; \
65 [preg] = dreg;
66
67#define trace_buffer_init(preg, dreg) \
68 preg.L = LO(TBUFCTL); \
69 preg.H = HI(TBUFCTL); \
70 dreg = BFIN_TRACE_INIT; \
71 [preg] = dreg;
72
73#define trace_buffer_save(preg, dreg) \
74 preg.L = LO(TBUFCTL); \
75 preg.H = HI(TBUFCTL); \
76 dreg = [preg]; \
77 [--sp] = dreg; \
78 dreg = 0x1; \
79 [preg] = dreg;
80
81#define trace_buffer_restore(preg, dreg) \
82 preg.L = LO(TBUFCTL); \
83 preg.H = HI(TBUFCTL); \
84 dreg = [sp++]; \
85 [preg] = dreg;
86
87#else /* CONFIG_DEBUG_BFIN_HWTRACE_ON */
88
89#define trace_buffer_stop(preg, dreg)
90#define trace_buffer_init(preg, dreg)
91#define trace_buffer_save(preg, dreg)
92#define trace_buffer_restore(preg, dreg)
93
94#endif /* CONFIG_DEBUG_BFIN_HWTRACE_ON */
95
96#ifdef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE
97# define DEBUG_HWTRACE_SAVE(preg, dreg) trace_buffer_save(preg, dreg)
98# define DEBUG_HWTRACE_RESTORE(preg, dreg) trace_buffer_restore(preg, dreg)
99#else
100# define DEBUG_HWTRACE_SAVE(preg, dreg)
101# define DEBUG_HWTRACE_RESTORE(preg, dreg)
102#endif
103
104#endif /* __ASSEMBLY__ */
105
106#endif /* _BLACKFIN_TRACE_ */
1/*
2 * header file for hardware trace functions
3 *
4 * Copyright 2007-2008 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2 or later.
7 */
8
9#ifndef _BLACKFIN_TRACE_
10#define _BLACKFIN_TRACE_
11
12/* Normally, we use ON, but you can't turn on software expansion until
13 * interrupts subsystem is ready
14 */
15
16#define BFIN_TRACE_INIT ((CONFIG_DEBUG_BFIN_HWTRACE_COMPRESSION << 4) | 0x03)
17#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
18#define BFIN_TRACE_ON (BFIN_TRACE_INIT | (CONFIG_DEBUG_BFIN_HWTRACE_EXPAND << 2))
19#else
20#define BFIN_TRACE_ON (BFIN_TRACE_INIT)
21#endif
22
23#ifndef __ASSEMBLY__
24extern unsigned long trace_buff_offset;
25extern unsigned long software_trace_buff[];
26#if defined(CONFIG_DEBUG_VERBOSE)
27extern void decode_address(char *buf, unsigned long address);
28extern bool get_instruction(unsigned int *val, unsigned short *address);
29#else
30static inline void decode_address(char *buf, unsigned long address) { }
31static inline bool get_instruction(unsigned int *val, unsigned short *address) { return false; }
32#endif
33
34/* Trace Macros for C files */
35
36#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
37
38#define trace_buffer_init() bfin_write_TBUFCTL(BFIN_TRACE_INIT)
39
40#define trace_buffer_save(x) \
41 do { \
42 (x) = bfin_read_TBUFCTL(); \
43 bfin_write_TBUFCTL((x) & ~TBUFEN); \
44 } while (0)
45
46#define trace_buffer_restore(x) \
47 do { \
48 bfin_write_TBUFCTL((x)); \
49 } while (0)
50#else /* DEBUG_BFIN_HWTRACE_ON */
51
52#define trace_buffer_save(x)
53#define trace_buffer_restore(x)
54#endif /* CONFIG_DEBUG_BFIN_HWTRACE_ON */
55
56#else
57/* Trace Macros for Assembly files */
58
59#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
60
61#define trace_buffer_stop(preg, dreg) \
62 preg.L = LO(TBUFCTL); \
63 preg.H = HI(TBUFCTL); \
64 dreg = 0x1; \
65 [preg] = dreg;
66
67#define trace_buffer_init(preg, dreg) \
68 preg.L = LO(TBUFCTL); \
69 preg.H = HI(TBUFCTL); \
70 dreg = BFIN_TRACE_INIT; \
71 [preg] = dreg;
72
73#define trace_buffer_save(preg, dreg) \
74 preg.L = LO(TBUFCTL); \
75 preg.H = HI(TBUFCTL); \
76 dreg = [preg]; \
77 [--sp] = dreg; \
78 dreg = 0x1; \
79 [preg] = dreg;
80
81#define trace_buffer_restore(preg, dreg) \
82 preg.L = LO(TBUFCTL); \
83 preg.H = HI(TBUFCTL); \
84 dreg = [sp++]; \
85 [preg] = dreg;
86
87#else /* CONFIG_DEBUG_BFIN_HWTRACE_ON */
88
89#define trace_buffer_stop(preg, dreg)
90#define trace_buffer_init(preg, dreg)
91#define trace_buffer_save(preg, dreg)
92#define trace_buffer_restore(preg, dreg)
93
94#endif /* CONFIG_DEBUG_BFIN_HWTRACE_ON */
95
96#ifdef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE
97# define DEBUG_HWTRACE_SAVE(preg, dreg) trace_buffer_save(preg, dreg)
98# define DEBUG_HWTRACE_RESTORE(preg, dreg) trace_buffer_restore(preg, dreg)
99#else
100# define DEBUG_HWTRACE_SAVE(preg, dreg)
101# define DEBUG_HWTRACE_RESTORE(preg, dreg)
102#endif
103
104#endif /* __ASSEMBLY__ */
105
106#endif /* _BLACKFIN_TRACE_ */