669b792c77
Turns on trace earlier, so crashes at kernel start should print out a trace, making things easier to debug. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
/*
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* Common header file for blackfin family of processors.
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*
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*/
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#ifndef _BLACKFIN_TRACE_
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#define _BLACKFIN_TRACE_
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#ifndef __ASSEMBLY__
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/* Trace Macros for C files */
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#define trace_buffer_save(x) \
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do { \
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(x) = bfin_read_TBUFCTL(); \
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bfin_write_TBUFCTL((x) & ~TBUFEN); \
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} while (0)
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#define trace_buffer_restore(x) \
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do { \
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bfin_write_TBUFCTL((x)); \
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} while (0)
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#else
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/* Trace Macros for Assembly files */
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#define TRACE_BUFFER_START(preg, dreg) trace_buffer_start(preg, dreg)
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#define TRACE_BUFFER_STOP(preg, dreg) trace_buffer_stop(preg, dreg)
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#define trace_buffer_stop(preg, dreg) \
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preg.L = LO(TBUFCTL); \
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preg.H = HI(TBUFCTL); \
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dreg = 0x1; \
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[preg] = dreg;
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#define trace_buffer_start(preg, dreg) \
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preg.L = LO(TBUFCTL); \
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preg.H = HI(TBUFCTL); \
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dreg = 0x13; \
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[preg] = dreg;
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#ifdef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE
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# define DEBUG_START_HWTRACE(preg, dreg) trace_buffer_start(preg, dreg)
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# define DEBUG_STOP_HWTRACE(preg, dreg) trace_buffer_stop(preg, dreg)
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#else
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# define DEBUG_START_HWTRACE(preg, dreg)
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# define DEBUG_STOP_HWTRACE(preg, dreg)
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* _BLACKFIN_TRACE_ */
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