Merge commit 'v2.6.28-rc6' into x86/urgent
[linux-2.6] / arch / blackfin / include / asm / trace.h
1 /*
2  * Common header file for blackfin family of processors.
3  *
4  */
5
6 #ifndef _BLACKFIN_TRACE_
7 #define _BLACKFIN_TRACE_
8
9 /* Normally, we use ON, but you can't turn on software expansion until
10  * interrupts subsystem is ready
11  */
12
13 #define BFIN_TRACE_INIT ((CONFIG_DEBUG_BFIN_HWTRACE_COMPRESSION << 4) | 0x03)
14 #ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
15 #define BFIN_TRACE_ON   (BFIN_TRACE_INIT | (CONFIG_DEBUG_BFIN_HWTRACE_EXPAND << 2))
16 #else
17 #define BFIN_TRACE_ON   (BFIN_TRACE_INIT)
18 #endif
19
20 #ifndef __ASSEMBLY__
21 extern unsigned long trace_buff_offset;
22 extern unsigned long software_trace_buff[];
23
24 /* Trace Macros for C files */
25
26 #ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
27
28 #define trace_buffer_save(x) \
29         do { \
30                 (x) = bfin_read_TBUFCTL(); \
31                 bfin_write_TBUFCTL((x) & ~TBUFEN); \
32         } while (0)
33
34 #define trace_buffer_restore(x) \
35         do { \
36                 bfin_write_TBUFCTL((x));        \
37         } while (0)
38 #else /* DEBUG_BFIN_HWTRACE_ON */
39
40 #define trace_buffer_save(x)
41 #define trace_buffer_restore(x)
42 #endif /* CONFIG_DEBUG_BFIN_HWTRACE_ON */
43
44 #else
45 /* Trace Macros for Assembly files */
46
47 #ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
48
49 #define trace_buffer_stop(preg, dreg)   \
50         preg.L = LO(TBUFCTL);           \
51         preg.H = HI(TBUFCTL);           \
52         dreg = 0x1;                     \
53         [preg] = dreg;
54
55 #define trace_buffer_init(preg, dreg) \
56         preg.L = LO(TBUFCTL);         \
57         preg.H = HI(TBUFCTL);         \
58         dreg = BFIN_TRACE_INIT;       \
59         [preg] = dreg;
60
61 #define trace_buffer_save(preg, dreg) \
62         preg.L = LO(TBUFCTL); \
63         preg.H = HI(TBUFCTL); \
64         dreg = [preg]; \
65         [--sp] = dreg; \
66         dreg = 0x1; \
67         [preg] = dreg;
68
69 #define trace_buffer_restore(preg, dreg) \
70         preg.L = LO(TBUFCTL); \
71         preg.H = HI(TBUFCTL); \
72         dreg = [sp++]; \
73         [preg] = dreg;
74
75 #else /* CONFIG_DEBUG_BFIN_HWTRACE_ON */
76
77 #define trace_buffer_stop(preg, dreg)
78 #define trace_buffer_init(preg, dreg)
79 #define trace_buffer_save(preg, dreg)
80 #define trace_buffer_restore(preg, dreg)
81
82 #endif /* CONFIG_DEBUG_BFIN_HWTRACE_ON */
83
84 #ifdef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE
85 # define DEBUG_HWTRACE_SAVE(preg, dreg)    trace_buffer_save(preg, dreg)
86 # define DEBUG_HWTRACE_RESTORE(preg, dreg) trace_buffer_restore(preg, dreg)
87 #else
88 # define DEBUG_HWTRACE_SAVE(preg, dreg)
89 # define DEBUG_HWTRACE_RESTORE(preg, dreg)
90 #endif
91
92 #endif /* __ASSEMBLY__ */
93
94 #endif                          /* _BLACKFIN_TRACE_ */