On Mon, 2007-02-26 at 10:08 +0100, Wolfgang Grandegger wrote:
> Philippe Gerum wrote:
> > On Sun, 2007-02-25 at 16:09 +0100, Wolfgang Grandegger wrote:
> >> Gilles Chanteperdrix wrote:
> >>> Wolfgang Grandegger wrote:
> >>> > Hello,
> >>> >
> >>> > here is the boot log of an hangup of 2.6.20 with I-pipe 1.7-02 and
> >>> > Xenomai todays trunk. I already reported this hangup a while ago but
> >>> now
> >>> > I get an oops. At that time Gilles said that lapic on old Athlons
> >>> might
> >>> > be buggy. Does the attached boot log confirm this assumption?
> >>> 2.6.20-rt8
> >>> > is working, BTW.
> >>>
> >>> What I had observed with an old Athlon were some random lockups. I was
> >>> trying to setup a samba print server at the time, and the lockup always
> >>> occured when some windows machine was trying to use the shared printer
> >>> through network. I think the IO-APIC was also enabled. Then, at some
> >>> later time, I read somewhere on the internet that the IO-APIC or LAPIC
> >>> could be buggy on some Athlons, so I understood what had happened to
> >>> me. So, I did not investigate this issue any further.
> >> I didn't either, especially because it works with lapic disabled in the
> >> kernel config. I just thought that this oops might be useful to somebody.
> >>
Ok, next try:
--- ksrc/arch/i386/hal.c (revision 2256)
+++ ksrc/arch/i386/hal.c (working copy)
@@ -119,23 +119,30 @@
}
}
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
-irqreturn_t rthal_broadcast_to_local_timers(int irq,
- void *dev_id, struct pt_regs *regs)
-#else /* >= 2.6.19 */
-irqreturn_t rthal_broadcast_to_local_timers(int irq,
- void *dev_id)
-#endif
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+#include <asm/smpboot.h>
+static inline void send_IPI_all(int vector)
{
- unsigned long flags;
+ unsigned long flags;
- rthal_local_irq_save_hw(flags);
- apic_wait_icr_idle();
- apic_write_around(APIC_ICR,
- APIC_DM_FIXED | APIC_DEST_ALLINC | LOCAL_TIMER_VECTOR);
- rthal_local_irq_restore_hw(flags);
+ rthal_local_irq_save_hw(flags);
+ apic_wait_icr_idle();
+ apic_write_around(APIC_ICR,
+ APIC_DM_FIXED | APIC_DEST_ALLINC | INT_DEST_ADDR_MODE
| vector);
+ rthal_local_irq_restore_hw(flags);
+}
+#else
+#include <mach_ipi.h>
+#endif
- return IRQ_HANDLED;
+DECLARE_LINUX_IRQ_HANDLER(rthal_broadcast_to_local_timers, irq, dev_id)
+{
+#ifdef CONFIG_SMP
+ send_IPI_all(LOCAL_TIMER_VECTOR);
+#else
+ rthal_trigger_irq(LOCAL_TIMER_VECTOR - FIRST_EXTERNAL_VECTOR);
+#endif
+ return IRQ_HANDLED;
}
unsigned long rthal_timer_calibrate(void)
Index: include/asm-i386/wrappers.h
===================================================================
--- include/asm-i386/wrappers.h (revision 2256)
+++ include/asm-i386/wrappers.h (working copy)
@@ -131,12 +131,19 @@
void *dev_id,
struct pt_regs *regs);
+#define DECLARE_LINUX_IRQ_HANDLER(fn, irq, dev_id) \
+ irqreturn_t fn(int irq, void *dev_id, struct pt_regs *regs)
+
#define rthal_irq_chip_end(irq) rthal_irq_chip_enable(irq)
#else /* >= 2.6.19 */
#define rthal_irq_chip_enable(irq) ({
rthal_irq_descp(irq)->chip->enable(irq); 0; })
#define rthal_irq_chip_disable(irq) ({
rthal_irq_descp(irq)->chip->disable(irq); 0; })
#define rthal_irq_chip_end(irq) ({ rthal_irq_descp(irq)->ipipe_end(irq,
rthal_irq_descp(irq)); 0; })
typedef irq_handler_t rthal_irq_host_handler_t;
+
+#define DECLARE_LINUX_IRQ_HANDLER(fn, irq, dev_id) \
+ irqreturn_t fn(int irq, void *dev_id)
+
#endif
#endif /* _XENO_ASM_I386_WRAPPERS_H */
--
Philippe.
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