From: Robin Getz <robin.g...@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.g...@analog.com>
Signed-off-by: Mike Frysinger <vap...@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;
}
--
1.6.5.4
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