linux.git/arch/sparc/kernel/leon_kernel.c, branch v3.10

sparc32, leon: Remove separate "ticker" timer for SMP

2013-06-19T09:10:29+00:00

This reduces the need from two timers to one timer.

Moreover, without this patch, when the "ticker" timer triggers timer_cs_read via
tick_periodic it reads the value of the usual timer it can get an wrapped timer
value without timer_cs_internal_counter having been updated leading to the clock
going backwards. This effectively hangs one cpu that gets stuck in
update_wall_time with an offset slightly smaller than 0xffffffffffffffff.

Signed-off-by: Andreas Larsson 
Signed-off-by: David S. Miller

sparc32, leon: Do not overwrite previously set irq flow handlers

2013-05-05T00:38:18+00:00

This is needed because when scan_of_devices finds the GAISLER_GPTIMER
core that corresponds to the SMP "ticker" timer, the previously set
proper irq flow handler gets overwritten with an incorrect one. This
leads to very flaky timer interrupt handling on some hardware. Proper
updates to handlers can still be done using leon_update_virq_handling.

Signed-off-by: Andreas Larsson 
Signed-off-by: David S. Miller

sparc32, leon: Check for existent irq_map entry in leon_handle_ext_irq

2012-11-10T00:30:50+00:00

If an irq is being unlinked concurrently with leon_handle_ext_irq,
irq_map[eirq] might be null in leon_handle_ext_irq. Make sure that
this is not dereferenced.

Signed-off-by: Andreas Larsson 
Acked-by: Sam Ravnborg 
Signed-off-by: David S. Miller

sparc32,leon: drop leon_init()

2012-07-26T23:46:16+00:00

This function was only used to set of_pdt_build_more to leon_node_init().
But the leon_node_init() was a nop as prom_amba_init was never assigned.

Cc: Daniel Hellstrom 
Cc: Konrad Eisele 
Signed-off-by: Sam Ravnborg 
Signed-off-by: David S. Miller

sparc32,leon: clean up leon.h

2012-05-28T06:52:45+00:00

- Drop unused stuff accumulated over time
- Drop non-leon stuff
- Include almost all of the header unconditionally

Signed-off-by: Sam Ravnborg 
Cc: Daniel Hellstrom 
Cc: Konrad Eisele

sparc32: remove remaining users of btfixup

2012-05-14T21:05:08+00:00

Use sparc_config to hold the last two function pointers.  There was no
point generating dedicated _ops structures only for these.

Signed-off-by: Sam Ravnborg 
Signed-off-by: David S. Miller

sparc32: move smp ipi to method ops

2012-05-14T21:05:07+00:00

I ended up renaming set_cpu_int to send_ipi to
be consistent all way around.
send_ipi was moved to the *_smp.c files so
we could call the relevant method direct,
without any _ops indirection.

Signed-off-by: Sam Ravnborg 
Signed-off-by: David S. Miller

sparc32: Move cache and TLB flushes over to method ops.

2012-05-14T03:49:31+00:00

This eliminated most of the remaining users of btfixup.

There are some complications because of the special cases we
have for sun4d, leon, and some flavors of viking.

It was found that there are no cases where a flush_page_for_dma
method was not hooked up to something, so the "noflush" iommu
methods were removed.

Add some documentation to the viking_sun4d_smp_ops to describe exactly
the hardware bug which causes us to need special TLB flushing on
sun4d.

Signed-off-by: David S. Miller

sparc32: drop unused clear_cpu_int

2012-05-13T19:51:57+00:00

Signed-off-by: Sam Ravnborg 
Signed-off-by: David S. Miller

sparc32: drop unused set_irq_udt

2012-05-13T19:51:56+00:00

Signed-off-by: Sam Ravnborg 
Signed-off-by: David S. Miller