tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
27/* Trace Macros for C files */
28
29#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
30
31#define trace_buffer_save(x) \
32 do { \
33 (x) = bfin_read_TBUFCTL(); \
34 bfin_write_TBUFCTL((x) & ~TBUFEN); \
35 } while (0)
36
37#define trace_buffer_restore(x) \
38 do { \
39 bfin_write_TBUFCTL((x)); \
40 } while (0)
41#else /* DEBUG_BFIN_HWTRACE_ON */
42
43#define trace_buffer_save(x)
44#define trace_buffer_restore(x)
45#endif /* CONFIG_DEBUG_BFIN_HWTRACE_ON */
46
47#else
48/* Trace Macros for Assembly files */
49
50#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
51
52#define trace_buffer_stop(preg, dreg) \
53 preg.L = LO(TBUFCTL); \
54 preg.H = HI(TBUFCTL); \
55 dreg = 0x1; \
56 [preg] = dreg;
57
58#define trace_buffer_init(preg, dreg) \
59 preg.L = LO(TBUFCTL); \
60 preg.H = HI(TBUFCTL); \
61 dreg = BFIN_TRACE_INIT; \
62 [preg] = dreg;
63
64#define trace_buffer_save(preg, dreg) \
65 preg.L = LO(TBUFCTL); \
66 preg.H = HI(TBUFCTL); \
67 dreg = [preg]; \
68 [--sp] = dreg; \
69 dreg = 0x1; \
70 [preg] = dreg;
71
72#define trace_buffer_restore(preg, dreg) \
73 preg.L = LO(TBUFCTL); \
74 preg.H = HI(TBUFCTL); \
75 dreg = [sp++]; \
76 [preg] = dreg;
77
78#else /* CONFIG_DEBUG_BFIN_HWTRACE_ON */
79
80#define trace_buffer_stop(preg, dreg)
81#define trace_buffer_init(preg, dreg)
82#define trace_buffer_save(preg, dreg)
83#define trace_buffer_restore(preg, dreg)
84
85#endif /* CONFIG_DEBUG_BFIN_HWTRACE_ON */
86
87#ifdef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE
88# define DEBUG_HWTRACE_SAVE(preg, dreg) trace_buffer_save(preg, dreg)
89# define DEBUG_HWTRACE_RESTORE(preg, dreg) trace_buffer_restore(preg, dreg)
90#else
91# define DEBUG_HWTRACE_SAVE(preg, dreg)
92# define DEBUG_HWTRACE_RESTORE(preg, dreg)
93#endif
94
95#endif /* __ASSEMBLY__ */
96
97#endif /* _BLACKFIN_TRACE_ */