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__
24 extern unsigned long trace_buff_offset;
25 extern unsigned long software_trace_buff[];
26 #if defined(CONFIG_DEBUG_VERBOSE)
27 extern void decode_address(char *buf, unsigned long address);
28 extern bool get_instruction(unsigned int *val, unsigned short *address);
29 #else
decode_address(char * buf,unsigned long address)30 static inline void decode_address(char *buf, unsigned long address) { }
get_instruction(unsigned int * val,unsigned short * address)31 static 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_ */
107