From: Robin Getz robin.getz@analog.com
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 --- 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; }