linux-toradex.git/arch/sparc/kernel/leon_kernel.c, branch v4.2.7

sparc: leon: Fix race condition between leon_cycles_offset and timer_interrupt

2014-09-09T23:39:10+00:00

This makes sure that leon_cycles_offset takes the pending bit into
account and that leon_clear_clock_irq clears the pending bit. Otherwise,
if leon_cycles_offset is executed after the timer has wrapped but before
timer_interrupt has increased timer_cs_internal_counter, time can be
perceived to go backwards.

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

sparc32: fix sparse warnings in time_32.c

2014-05-19T02:01:27+00:00

Fix following warnings:
time_32.c:63:1: warning: symbol 'rtc_lock' was not declared. Should it be static?
time_32.c:357:13: warning: symbol 'time_init' was not declared. Should it be static?
time_32.c:148:16: warning: dereference of noderef expression

Add extern definition of rtc_lock in mc146818rtc.h.
time_init() is called from init/main.c - add prototype to kernel.h.
Use proper u32 __iomem * for master_l10_counter.
Fix all users.

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

sparc32: fix sparse warnings in leon_kernel.c

2014-04-29T05:12:27+00:00

Fix following warnings:
leon_kernel.c:40:15: warning: symbol 'leon3_gptimer_idx' was not declared. Should it be static?
leon_kernel.c:68:6: warning: symbol 'leon_eirq_setup' was not declared. Should it be static?
leon_kernel.c:273:13: warning: symbol 'leon_percpu_timer_ce_interrupt' was not declared. Should it be static?

Define symbols as static.

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

sparc32: fix sparse warnings in sun4m_irq.c and sun4d_irq.c

2014-04-29T05:12:25+00:00

Fix following warnings:

sun4m_irq.c:308:6: warning: symbol 'sun4m_nmi' was not declared. Should it be static?
sun4m_irq.c:396:28: warning: incorrect type in assignment (different address spaces)
sun4m_irq.c:396:28:    expected unsigned int volatile *extern [addressable] [toplevel] master_l10_counter
sun4d_irq.c:469:28: warning: incorrect type in assignment (different address spaces)
sun4d_irq.c:469:28:    expected unsigned int volatile *extern [addressable] [toplevel] master_l10_counter

master_l10_counter is a pointer to __iomem - add annotations.

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

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