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[MIPS] vr41xx: add cpu_wait

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Add cpu_wait for NEC VR41xx

Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Yoichi Yuasa 2007-08-07 00:09:17 +09:00 committed by Ralf Baechle
parent f571eff0a2
commit 61a33168be
1 changed files with 16 additions and 2 deletions
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18
arch/mips/vr41xx/common/pmu.c
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@ -1,7 +1,7 @@
/*
* pmu.c, Power Management Unit routines for NEC VR4100 series.
*
* Copyright (C) 2003-2005 Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
* Copyright (C) 2003-2007 Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -22,11 +22,12 @@
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/pm.h>
#include <linux/smp.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <asm/cpu.h>
#include <asm/io.h>
#include <asm/processor.h>
#include <asm/reboot.h>
#include <asm/system.h>
@ -44,6 +45,18 @@ static void __iomem *pmu_base;
#define pmu_read(offset) readw(pmu_base + (offset))
#define pmu_write(offset, value) writew((value), pmu_base + (offset))
static void vr41xx_cpu_wait(void)
{
local_irq_disable();
if (!need_resched())
/*
* "standby" sets IE bit of the CP0_STATUS to 1.
*/
__asm__("standby;\n");
else
local_irq_enable();
}
static inline void software_reset(void)
{
uint16_t pmucnt2;
@ -113,6 +126,7 @@ static int __init vr41xx_pmu_init(void)
return -EBUSY;
}
cpu_wait = vr41xx_cpu_wait;
_machine_restart = vr41xx_restart;
_machine_halt = vr41xx_halt;
pm_power_off = vr41xx_power_off;