linux.git/arch/mips/kernel/cpu-probe.c, branch v2.6.23

[MIPS] 20Kc: Disable use of WAIT instruction.

2007-09-14T18:08:43+00:00

Another issue with 20Kc's WAIT, waiting for more details.  With the
2.6.23 release immindent simply disable the use of WAIT instead of a
more fancy workaround.

Signed-off-by: Ralf Baechle

[MIPS] Workaround for RM7000 WAIT instruction aka erratum 38

2007-07-20T17:57:39+00:00

Signed-off-by: Ralf Baechle

[MIPS] PMC MSP71xx mips common

2007-07-10T16:33:03+00:00

Patch to add mips common support for the PMC-Sierra MSP71xx devices.

Signed-off-by: Marc St-Jean 
Signed-off-by: Ralf Baechle

[MIPS] define Hit_Invalidate_I to Index_Invalidate_I for loongson2

2007-07-10T16:33:02+00:00

Signed-off-by: Fuxin Zhang 
Signed-off-by: Ralf Baechle

[MIPS] Enable support for the userlocal hardware register

2007-07-10T16:33:02+00:00

Which will cut down the cost of RDHWR $29 which is used to obtain the
TLS pointer and so far being emulated in software down to a single cycle
operation.

Signed-off-by: Ralf Baechle

[MIPS] Fix scheduling latency issue on 24K, 34K and 74K cores

2007-07-06T15:17:11+00:00

The idle loop goes to sleep using the WAIT instruction if !need_resched().
This has is suffering from from a race condition that if if just after
need_resched has returned 0 an interrupt might set TIF_NEED_RESCHED but
we've just completed the test so go to sleep anyway.  This would be
trivial to fix by just disabling interrupts during that sequence as in:

        local_irq_disable();
        if (!need_resched())
                __asm__("wait");
        local_irq_enable();

but the processor architecture leaves it undefined if a processor calling
WAIT with interrupts disabled will ever restart its pipeline and indeed
some processors have made use of the freedom provided by the architecture
definition.  This has been resolved and the Config7.WII bit indicates that
the use of WAIT is safe on 24K, 24KE and 34K cores.  It also is safe on
74K starting revision 2.1.0 so enable the use of WAIT with interrupts
disabled for 74K based on a c0_prid of at least that.

Signed-off-by: Ralf Baechle

[MIPS] 20K: Handle WAIT related bugs according to errata information

2007-06-26T17:57:33+00:00

We used to avoid the WAIT entirely on the 20K but really only need to do
this on early revs of the 20K.  Without this a 20K was a bit of a
power hog.  Well, in the lower power power hog category ;-)

Signed-off-by: Ralf Baechle

[MIPS] Make some __setup functions static

2007-02-20T01:26:41+00:00

This fixes some sparse warnings. ("warning: symbol 'foo' was not
declared. Should it be static?")

Signed-off-by: Atsushi Nemoto 
Signed-off-by: Ralf Baechle

[MIPS] Include to for declaration of check_bugs32.

2007-02-18T21:31:36+00:00

Signed-off-by: Ralf Baechle

[MIPS] Whitespace cleanups.

2007-02-06T16:53:19+00:00

Signed-off-by: Ralf Baechle