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-rw-r--r--arch/mips/kernel/idle.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/arch/mips/kernel/idle.c b/arch/mips/kernel/idle.c
index 3b09b888afa9..0c655deeea4a 100644
--- a/arch/mips/kernel/idle.c
+++ b/arch/mips/kernel/idle.c
@@ -93,26 +93,27 @@ static void rm7k_wait_irqoff(void)
}
/*
- * The Au1xxx wait is available only if using 32khz counter or
- * external timer source, but specifically not CP0 Counter.
- * alchemy/common/time.c may override cpu_wait!
+ * Au1 'wait' is only useful when the 32kHz counter is used as timer,
+ * since coreclock (and the cp0 counter) stops upon executing it. Only an
+ * interrupt can wake it, so they must be enabled before entering idle modes.
*/
static void au1k_wait(void)
{
+ unsigned long c0status = read_c0_status() | 1; /* irqs on */
+
__asm__(
" .set mips3 \n"
" cache 0x14, 0(%0) \n"
" cache 0x14, 32(%0) \n"
" sync \n"
- " nop \n"
+ " mtc0 %1, $12 \n" /* wr c0status */
" wait \n"
" nop \n"
" nop \n"
" nop \n"
" nop \n"
" .set mips0 \n"
- : : "r" (au1k_wait));
- local_irq_enable();
+ : : "r" (au1k_wait), "r" (c0status));
}
static int __initdata nowait;
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