diff options
| author | Robin Getz <robin.getz@analog.com> | 2007-07-25 11:03:28 +0800 |
|---|---|---|
| committer | Bryan Wu <bryan.wu@analog.com> | 2007-07-25 11:03:28 +0800 |
| commit | 518039bc24cbb9ce34665814fe120eac50bedd9a (patch) | |
| tree | 6b089a05025ae224d6636b6dc9d95e7c9e4677eb /include | |
| parent | f16295e7e7f2a2a15876f570f10d6dc8f1f36ab8 (diff) | |
Blackfin arch: Add ability to expend the hardware trace buffer
Add ability to expend the hardware trace buffer via a configurable
software buffer - so you can have lots of history when a crash occurs.
The interesting way we do printk in the traps.c confusese the checking
script
Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-blackfin/trace.h | 55 |
1 files changed, 46 insertions, 9 deletions
diff --git a/include/asm-blackfin/trace.h b/include/asm-blackfin/trace.h index 9c2474c9a589..6313aace9d59 100644 --- a/include/asm-blackfin/trace.h +++ b/include/asm-blackfin/trace.h @@ -6,23 +6,46 @@ #ifndef _BLACKFIN_TRACE_ #define _BLACKFIN_TRACE_ +/* Normally, we use ON, but you can't turn on software expansion until + * interrupts subsystem is ready + */ + +#define BFIN_TRACE_INIT ((CONFIG_DEBUG_BFIN_HWTRACE_COMPRESSION << 4) | 0x03) +#ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND +#define BFIN_TRACE_ON (BFIN_TRACE_INIT | (CONFIG_DEBUG_BFIN_HWTRACE_EXPAND << 2)) +#else +#define BFIN_TRACE_ON (BFIN_TRACE_INIT) +#endif + #ifndef __ASSEMBLY__ +extern unsigned long trace_buff_offset; +extern unsigned long software_trace_buff[]; + /* Trace Macros for C files */ +#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON + #define trace_buffer_save(x) \ - do { \ - (x) = bfin_read_TBUFCTL(); \ - bfin_write_TBUFCTL((x) & ~TBUFEN); \ - } while (0) + do { \ + (x) = bfin_read_TBUFCTL(); \ + bfin_write_TBUFCTL((x) & ~TBUFEN); \ + } while (0) #define trace_buffer_restore(x) \ - do { \ - bfin_write_TBUFCTL((x)); \ - } while (0) + do { \ + bfin_write_TBUFCTL((x)); \ + } while (0) +#else /* DEBUG_BFIN_HWTRACE_ON */ + +#define trace_buffer_save(x) +#define trace_buffer_restore(x) +#endif /* CONFIG_DEBUG_BFIN_HWTRACE_ON */ #else /* Trace Macros for Assembly files */ +#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) @@ -32,12 +55,26 @@ dreg = 0x1; \ [preg] = dreg; -#define trace_buffer_start(preg, dreg) \ +#define trace_buffer_start(preg, dreg) \ preg.L = LO(TBUFCTL); \ preg.H = HI(TBUFCTL); \ - dreg = 0x13; \ + 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; +#else /* CONFIG_DEBUG_BFIN_HWTRACE_ON */ + +#define trace_buffer_stop(preg, dreg) +#define trace_buffer_start(preg, dreg) +#define trace_buffer_init(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) |