aboutsummaryrefslogtreecommitdiffstats
path: root/include
diff options
context:
space:
mode:
authorMike Frysinger <vapier.adi@gmail.com>2008-02-02 02:47:24 -0500
committerBryan Wu <bryan.wu@analog.com>2008-02-02 02:47:24 -0500
commit80f31c8a03d2f0644d0ceaf14e7e0108a007c962 (patch)
tree71af89f61a1e9f969b9d24977e97ed5982f98237 /include
parenta3acf52885a2312efb30a043062ef88dc3813082 (diff)
[Blackfin] arch: change the trace buffer control start/stop logic in the exception handlers
To save/restore the trace buffer control so that if we take an exception after turning off the trace buffer at a higher level we dont inadvertently turn the trace buffer back on Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Diffstat (limited to 'include')
-rw-r--r--include/asm-blackfin/trace.h35
1 files changed, 20 insertions, 15 deletions
diff --git a/include/asm-blackfin/trace.h b/include/asm-blackfin/trace.h
index 6313aace9d59..ef18afbc2101 100644
--- a/include/asm-blackfin/trace.h
+++ b/include/asm-blackfin/trace.h
@@ -46,42 +46,47 @@ extern unsigned long software_trace_buff[];
46 46
47#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON 47#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
48 48
49#define TRACE_BUFFER_START(preg, dreg) trace_buffer_start(preg, dreg)
50#define TRACE_BUFFER_STOP(preg, dreg) trace_buffer_stop(preg, dreg)
51
52#define trace_buffer_stop(preg, dreg) \ 49#define trace_buffer_stop(preg, dreg) \
53 preg.L = LO(TBUFCTL); \ 50 preg.L = LO(TBUFCTL); \
54 preg.H = HI(TBUFCTL); \ 51 preg.H = HI(TBUFCTL); \
55 dreg = 0x1; \ 52 dreg = 0x1; \
56 [preg] = dreg; 53 [preg] = dreg;
57 54
58#define trace_buffer_start(preg, dreg) \
59 preg.L = LO(TBUFCTL); \
60 preg.H = HI(TBUFCTL); \
61 dreg = BFIN_TRACE_ON; \
62 [preg] = dreg;
63
64#define trace_buffer_init(preg, dreg) \ 55#define trace_buffer_init(preg, dreg) \
65 preg.L = LO(TBUFCTL); \ 56 preg.L = LO(TBUFCTL); \
66 preg.H = HI(TBUFCTL); \ 57 preg.H = HI(TBUFCTL); \
67 dreg = BFIN_TRACE_INIT; \ 58 dreg = BFIN_TRACE_INIT; \
68 [preg] = dreg; 59 [preg] = dreg;
69 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
70#else /* CONFIG_DEBUG_BFIN_HWTRACE_ON */ 75#else /* CONFIG_DEBUG_BFIN_HWTRACE_ON */
71 76
72#define trace_buffer_stop(preg, dreg) 77#define trace_buffer_stop(preg, dreg)
73#define trace_buffer_start(preg, dreg)
74#define trace_buffer_init(preg, dreg) 78#define trace_buffer_init(preg, dreg)
79#define trace_buffer_save(preg, dreg)
80#define trace_buffer_restore(preg, dreg)
75 81
76#endif /* CONFIG_DEBUG_BFIN_HWTRACE_ON */ 82#endif /* CONFIG_DEBUG_BFIN_HWTRACE_ON */
77 83
78#ifdef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE 84#ifdef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE
79# define DEBUG_START_HWTRACE(preg, dreg) trace_buffer_start(preg, dreg) 85# define DEBUG_HWTRACE_SAVE(preg, dreg) trace_buffer_save(preg, dreg)
80# define DEBUG_STOP_HWTRACE(preg, dreg) trace_buffer_stop(preg, dreg) 86# define DEBUG_HWTRACE_RESTORE(preg, dreg) trace_buffer_restore(preg, dreg)
81
82#else 87#else
83# define DEBUG_START_HWTRACE(preg, dreg) 88# define DEBUG_HWTRACE_SAVE(preg, dreg)
84# define DEBUG_STOP_HWTRACE(preg, dreg) 89# define DEBUG_HWTRACE_RESTORE(preg, dreg)
85#endif 90#endif
86 91
87#endif /* __ASSEMBLY__ */ 92#endif /* __ASSEMBLY__ */