91179395baa8a65daa0fd7b3d3bfdfc8390e9fcd
[linux-3.10.git] / arch / blackfin / include / asm / trace.h
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 short *val, unsigned short *address);
29 #else
30 #define decode_address(buf, address)
31 #define get_instruction(val, address) 0
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_ */