I have over the weekend tried to port sparc32 to support genirq.
This is based on an old patch by David Miller.
I have concentrated on sum4m - as this is HW I have.
Status is that booting hangs in calibrate_delay() which
gives us a good hint that the timer interrupt is not working.
I have tried to debug it but ran out of ideas for now.
Note: Please do not look at sun4c + sun4d - code
is only included if someone wanted to build it.
Also - I have not looked at leon.
The diffstat looks promising:
arch/sparc/Kconfig | 5 +-
arch/sparc/include/asm/irq_32.h | 8 +-
arch/sparc/include/asm/system_32.h | 5 -
arch/sparc/kernel/Makefile | 4 -
arch/sparc/kernel/irq.h | 70 +++---
arch/sparc/kernel/irq_32.c | 502 ++++++++++--------------------------
arch/sparc/kernel/leon_kernel.c | 2 +-
arch/sparc/kernel/of_device_32.c | 59 +----
arch/sparc/kernel/pcic.c | 42 ---
arch/sparc/kernel/sun4c_irq.c | 139 ++++++----
arch/sparc/kernel/sun4d_irq.c | 453 +++++++++++++-------------------
arch/sparc/kernel/sun4m_irq.c | 193 +++++++-------
arch/sparc/kernel/sun4m_smp.c | 2 +-
arch/sparc/kernel/time_32.c | 2 +-
14 files changed, 546 insertions(+), 940 deletions(-)
The first three patches are preparational patches:
sparc32: introduce sparc_irq_config
sparc32: introduce build_device_irq
sparc32,sun4m: made a few structs global
Theey need a fresh-up of the changelog - otherwise I consider
these OK.
The last patch is the actual conversion. And by nature it
is rather big (and not easy to read either).
handler_irq() in irq_32.c is a rough copy of the sparc64 variant.
But I may have missed something obvious.
In pcic.c I deleted some enable/disable functions.
I simply fail to see how they were used before - but it is
likely that I need to re-introduce these again.
For now my problem is that my timer interrupt never seems
to trigger thus causing the hang in calibrate_delay()
Any input is appreciated - especially the setup of
the genirq stuff etc.
Sam
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