diff options
author | Robin Getz <robin.getz@analog.com> | 2009-12-21 21:59:21 (GMT) |
---|---|---|
committer | Mike Frysinger <vapier@gentoo.org> | 2010-01-17 14:17:27 (GMT) |
commit | b6db2834407d49ec48ac8e9281fdd704d5ee3eba (patch) | |
tree | a6e6de41825251d5dfd69d7144f385f5b6ab3f7d /cpu | |
parent | 0097870e3d72f10ec58ae22488945fd9ee37289f (diff) | |
download | u-boot-b6db2834407d49ec48ac8e9281fdd704d5ee3eba.tar.xz |
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>
Diffstat (limited to 'cpu')
-rw-r--r-- | cpu/blackfin/traps.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/cpu/blackfin/traps.c b/cpu/blackfin/traps.c index 7e7c74c..becc36e 100644 --- a/cpu/blackfin/traps.c +++ b/cpu/blackfin/traps.c @@ -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; } |