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9 Commits

Author SHA1 Message Date
Manuel Lauss
e63a24ddc7 MIPS: Alchemy: fix wait function 
Only an interrupt can wake the core from 'wait', enable interrupts
locally before executing 'wait'.

[ralf@linux-mips.org: This leave the race between an interrupt that's
setting TIF_NEED_RESCHEd and entering the WAIT status. but at least it's
going to bring Alchemy back from the dead, so I'm going to apply this
patch.]

Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Cc: Maciej W. Rozycki <macro@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/5408/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2013-06-10 17:59:46 +02:00
Ralf Baechle
087d990b37 MIPS: Idle: Break r4k_wait into two functions and fix it. 
local_irq_enable() may expand into very different code, so it rather should
stay in C.  Also this keeps the assembler code size constant which keeps
the rollback code simple.  So it's best to split r4k_wait into two parts,
one C and one assembler.

Finally add the local_irq_enable() to r4k_wait to ensure the WAIT
instruction in __r4k_wait() will work properly.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2013-05-22 01:34:28 +02:00
Ralf Baechle
bdc92d74e0 MIPS: Idle: Consolidate all declarations in <asm/idle.h>. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2013-05-22 01:34:27 +02:00
Ralf Baechle
d882f07a83 MIPS: Idle: Don't call local_irq_disable() in cpu_wait() implementations. 
The generic idle loop has already disabled interrupts so this is redundant.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2013-05-22 01:34:27 +02:00
Ralf Baechle
fb40bc3e94 MIPS: Idle: Re-enable irqs at the end of r3081, au1k and loongson2 cpu_wait. 
Without this, the

    WARN_ON_ONCE(irqs_disabled());

in the idle loop will be triggered.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2013-05-22 01:34:26 +02:00
Ralf Baechle
c9b6869dbb MIPS: Idle: Make call of function pointer readable. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2013-05-22 01:34:26 +02:00
Ralf Baechle
f91a148aa2 MIPS: Idle: Consistently reformat inline assembler. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2013-05-22 01:34:25 +02:00
Ralf Baechle
00baf8576c MIPS: Idle: cleaup SMTC idle hook as per Linux coding style. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2013-05-22 01:34:25 +02:00
Ralf Baechle
49f2ec91e1 MIPS: Consolidate idle loop / WAIT instruction support in a single file. 
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 2013-05-22 01:34:25 +02:00