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Blackfin: keep hwtrace on CPLB miss 

Crashes rarely happen in the CPLB miss handler compared to the rest of
U-Boot code, so disable hardware tracing when processing misses.  This
way a crash due to other functions will be shown properly.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Robin Getz 2009-12-21 16:59:21 -05:00 committed by Mike Frysinger
parent 0097870e3d
commit b6db283440
1 changed files with 9 additions and 0 deletions
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9
cpu/blackfin/traps.c
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@ -100,6 +100,14 @@ void trap_c(struct pt_regs *regs)
uint32_t new_cplb_addr = 0, new_cplb_data = 0;
static size_t last_evicted;
size_t i;
unsigned long tflags;
/*
* Keep the trace buffer so that a miss here points people
* to the right place (their code). Crashes here rarely
* happen. If they do, only the Blackfin maintainer cares.
*/
trace_buffer_save(tflags);
new_cplb_addr = (data ? bfin_read_DCPLB_FAULT_ADDR() : bfin_read_ICPLB_FAULT_ADDR()) & ~(4 * 1024 * 1024 - 1);
@ -156,6 +164,7 @@ void trap_c(struct pt_regs *regs)
for (i = 0; i < 16; ++i)
debug("%2i 0x%p 0x%08X\n", i, *CPLB_ADDR++, *CPLB_DATA++);
trace_buffer_restore(tflags);
break;
}