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authorYoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>2007-08-07 00:09:17 +0900
committerRalf Baechle <ralf@linux-mips.org>2007-10-11 23:45:58 +0100
commit61a33168bebb6ce5343a5f34ab421971dbfae9fa (patch)
tree855ad0dd5373ce7f13e8c45dde605f11894da674 /arch/mips
parentf571eff0a24ed97a919f2b61bb4afdeab4b43002 (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')
-rw-r--r--arch/mips/vr41xx/common/pmu.c18
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;