diff options
| author | Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> | 2007-08-07 00:09:17 +0900 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2007-10-11 23:45:58 +0100 |
| commit | 61a33168bebb6ce5343a5f34ab421971dbfae9fa (patch) | |
| tree | 855ad0dd5373ce7f13e8c45dde605f11894da674 /arch/mips/vr41xx | |
| parent | f571eff0a24ed97a919f2b61bb4afdeab4b43002 (diff) | |
[MIPS] vr41xx: add cpu_wait
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>
Diffstat (limited to 'arch/mips/vr41xx')
| -rw-r--r-- | arch/mips/vr41xx/common/pmu.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/arch/mips/vr41xx/common/pmu.c b/arch/mips/vr41xx/common/pmu.c index 5e469796413..e0ffbe9a984 100644 --- a/arch/mips/vr41xx/common/pmu.c +++ b/arch/mips/vr41xx/common/pmu.c @@ -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; |