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

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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 <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle
2007-09-14 19:08:43 +01:00
parent 8df5beac2a
commit 50da469a79
1 changed files with 8 additions and 1 deletions
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7
arch/mips/kernel/cpu-probe.c
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@@ -199,7 +199,14 @@ static inline void check_wait(void)
if ((c->processor_id & 0xff) <= 0x64) if ((c->processor_id & 0xff) <= 0x64)
break; break;
/*
* Another rev is incremeting c0_count at a reduced clock
* rate while in WAIT mode. So we basically have the choice
* between using the cp0 timer as clocksource or avoiding
* the WAIT instruction. Until more details are known,
* disable the use of WAIT for 20Kc entirely.
cpu_wait = r4k_wait; cpu_wait = r4k_wait;
*/
break; break;
case CPU_RM9000: case CPU_RM9000:
if ((c->processor_id & 0x00ff) >= 0x40) if ((c->processor_id & 0x00ff) >= 0x40)