Module: xenomai-head
Branch: master
Commit: 3788764b408e9a69187755bdf4908d3cad0bfe8f
URL:
http://git.xenomai.org/?p=xenomai-head.git;a=commit;h=3788764b408e9a69187755bdf4908d3cad0bfe8f
Author: Jan Kiszka <jan.kis...@siemens.com>
Date: Tue Jun 28 18:12:51 2011 +0200
hal: Stall root domain in rthal_emergency_console
Calling printk with the root domain unstalled will make it reenable hard
IRQs on exit. That will sooner or later trigger I-pipe bug checks and
corrupt the panic dump. Avoid this by stalling the root domain when
entering emergency console mode. We are doomed anyway.
Signed-off-by: Jan Kiszka <jan.kis...@siemens.com>
---
include/asm-generic/hal.h | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/include/asm-generic/hal.h b/include/asm-generic/hal.h
index 7b4b975..b76f19a 100644
--- a/include/asm-generic/hal.h
+++ b/include/asm-generic/hal.h
@@ -190,9 +190,14 @@ typedef spinlock_t rthal_spinlock_t;
#define rthal_setsched_root(t,pol,prio)
ipipe_setscheduler_root(t,pol,prio)
#define rthal_reenter_root(t,pol,prio) ipipe_reenter_root(t,pol,prio)
-#define rthal_emergency_console()
ipipe_set_printk_sync(ipipe_current_domain)
#define rthal_read_tsc(v) ipipe_read_tsc(v)
+#define rthal_emergency_console() \
+ do { \
+ ipipe_stall_pipeline_from(ipipe_root_domain); \
+ ipipe_set_printk_sync(ipipe_current_domain); \
+ } while (0)
+
#ifdef __IPIPE_FEATURE_SYSINFO_V2
static inline unsigned long rthal_get_cpufreq(void)
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