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| author |   Mike Frysinger <vapier.adi@gmail.com> | 2008-02-02 15:47:24 +0800 |
|---|---|---|
| committer |   Bryan Wu <bryan.wu@analog.com> | 2008-02-02 15:47:24 +0800 |
| commit | 80f31c8a03d2f0644d0ceaf14e7e0108a007c962 (patch) | |
| tree | 71af89f61a1e9f969b9d24977e97ed5982f98237 /include/asm-blackfin/trace.h | |
| parent | [Blackfin] arch: fix typo in printk message (diff) | |
| download | linux-dev-80f31c8a03d2f0644d0ceaf14e7e0108a007c962.tar.xz linux-dev-80f31c8a03d2f0644d0ceaf14e7e0108a007c962.zip | |
[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 '')
| -rw-r--r-- | include/asm-blackfin/trace.h | 35 |
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[]; #ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON -#define TRACE_BUFFER_START(preg, dreg) trace_buffer_start(preg, dreg) -#define TRACE_BUFFER_STOP(preg, dreg) trace_buffer_stop(preg, dreg) - #define trace_buffer_stop(preg, dreg) \ preg.L = LO(TBUFCTL); \ preg.H = HI(TBUFCTL); \ dreg = 0x1; \ [preg] = dreg; -#define trace_buffer_start(preg, dreg) \ - preg.L = LO(TBUFCTL); \ - preg.H = HI(TBUFCTL); \ - dreg = BFIN_TRACE_ON; \ - [preg] = dreg; - #define trace_buffer_init(preg, dreg) \ preg.L = LO(TBUFCTL); \ preg.H = HI(TBUFCTL); \ dreg = BFIN_TRACE_INIT; \ [preg] = dreg; +#define trace_buffer_save(preg, dreg) \ + preg.L = LO(TBUFCTL); \ + preg.H = HI(TBUFCTL); \ + dreg = [preg]; \ + [sp++] = dreg; \ + dreg = 0x1; \ + [preg] = dreg; + +#define trace_buffer_restore(preg, dreg) \ + preg.L = LO(TBUFCTL); \ + preg.H = HI(TBUFCTL); \ + dreg = [sp--]; \ + [preg] = dreg; + #else /* CONFIG_DEBUG_BFIN_HWTRACE_ON */ #define trace_buffer_stop(preg, dreg) -#define trace_buffer_start(preg, dreg) #define trace_buffer_init(preg, dreg) +#define trace_buffer_save(preg, dreg) +#define trace_buffer_restore(preg, dreg) #endif /* CONFIG_DEBUG_BFIN_HWTRACE_ON */ #ifdef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE -# define DEBUG_START_HWTRACE(preg, dreg) trace_buffer_start(preg, dreg) -# define DEBUG_STOP_HWTRACE(preg, dreg) trace_buffer_stop(preg, dreg) - +# define DEBUG_HWTRACE_SAVE(preg, dreg) trace_buffer_save(preg, dreg) +# define DEBUG_HWTRACE_RESTORE(preg, dreg) trace_buffer_restore(preg, dreg) #else -# define DEBUG_START_HWTRACE(preg, dreg) -# define DEBUG_STOP_HWTRACE(preg, dreg) +# define DEBUG_HWTRACE_SAVE(preg, dreg) +# define DEBUG_HWTRACE_RESTORE(preg, dreg) #endif #endif /* __ASSEMBLY__ */ |