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sh: Split out the idle loop for reuse between _32/_64 variants.

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Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2008-11-26 15:52:44 +09:00
parent eb67cf14ae
commit 1da1180c6e
5 changed files with 83 additions and 123 deletions
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2
arch/sh/kernel/Makefile_32
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@ -9,7 +9,7 @@ ifdef CONFIG_FUNCTION_TRACER
CFLAGS_REMOVE_ftrace.o = -pg
endif
obj-y := debugtraps.o disassemble.o io.o io_generic.o irq.o \
obj-y := debugtraps.o disassemble.o idle.o io.o io_generic.o irq.o \
machvec.o process_32.o ptrace_32.o setup.o signal_32.o \
sys_sh.o sys_sh32.o syscalls_32.o time_32.o topology.o \
traps.o traps_32.o

2
arch/sh/kernel/Makefile_64
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@ -1,6 +1,6 @@
extra-y := head_64.o init_task.o vmlinux.lds
obj-y := debugtraps.o io.o io_generic.o irq.o machvec.o process_64.o \
obj-y := debugtraps.o idle.o io.o io_generic.o irq.o machvec.o process_64.o \
ptrace_64.o setup.o signal_64.o sys_sh.o sys_sh64.o \
syscalls_64.o time_64.o topology.o traps.o traps_64.o

81
arch/sh/kernel/idle.c Normal file
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@ -0,0 +1,81 @@
/*
* The idle loop for all SuperH platforms.
*
* Copyright (C) 2002 - 2008 Paul Mundt
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/pm.h>
#include <linux/tick.h>
#include <linux/preempt.h>
#include <linux/thread_info.h>
#include <linux/irqflags.h>
#include <asm/pgalloc.h>
#include <asm/system.h>
#include <asm/atomic.h>
static int hlt_counter;
void (*pm_idle)(void);
void (*pm_power_off)(void);
EXPORT_SYMBOL(pm_power_off);
static int __init nohlt_setup(char *__unused)
{
hlt_counter = 1;
return 1;
}
__setup("nohlt", nohlt_setup);
static int __init hlt_setup(char *__unused)
{
hlt_counter = 0;
return 1;
}
__setup("hlt", hlt_setup);
static void default_idle(void)
{
if (!hlt_counter) {
clear_thread_flag(TIF_POLLING_NRFLAG);
smp_mb__after_clear_bit();
set_bl_bit();
stop_critical_timings();
while (!need_resched())
cpu_sleep();
start_critical_timings();
clear_bl_bit();
set_thread_flag(TIF_POLLING_NRFLAG);
} else
while (!need_resched())
cpu_relax();
}
void cpu_idle(void)
{
set_thread_flag(TIF_POLLING_NRFLAG);
/* endless idle loop with no priority at all */
while (1) {
void (*idle)(void) = pm_idle;
if (!idle)
idle = default_idle;
tick_nohz_stop_sched_tick(1);
while (!need_resched())
idle();
tick_nohz_restart_sched_tick();
preempt_enable_no_resched();
schedule();
preempt_disable();
check_pgt_cache();
}
}

61
arch/sh/kernel/process_32.c
View File

@ -32,69 +32,8 @@
#include <asm/fpu.h>
#include <asm/syscalls.h>
static int hlt_counter;
int ubc_usercnt = 0;
void (*pm_idle)(void);
void (*pm_power_off)(void);
EXPORT_SYMBOL(pm_power_off);
static int __init nohlt_setup(char *__unused)
{
hlt_counter = 1;
return 1;
}
__setup("nohlt", nohlt_setup);
static int __init hlt_setup(char *__unused)
{
hlt_counter = 0;
return 1;
}
__setup("hlt", hlt_setup);
static void default_idle(void)
{
if (!hlt_counter) {
clear_thread_flag(TIF_POLLING_NRFLAG);
smp_mb__after_clear_bit();
set_bl_bit();
stop_critical_timings();
while (!need_resched())
cpu_sleep();
start_critical_timings();
clear_bl_bit();
set_thread_flag(TIF_POLLING_NRFLAG);
} else
while (!need_resched())
cpu_relax();
}
void cpu_idle(void)
{
set_thread_flag(TIF_POLLING_NRFLAG);
/* endless idle loop with no priority at all */
while (1) {
void (*idle)(void) = pm_idle;
if (!idle)
idle = default_idle;
tick_nohz_stop_sched_tick(1);
while (!need_resched())
idle();
tick_nohz_restart_sched_tick();
preempt_enable_no_resched();
schedule();
preempt_disable();
check_pgt_cache();
}
}
void machine_restart(char * __unused)
{
/* SR.BL=1 and invoke address error to let CPU reset (manual reset) */

60
arch/sh/kernel/process_64.c
View File

@ -33,56 +33,6 @@
struct task_struct *last_task_used_math = NULL;
static int hlt_counter = 1;
#define HARD_IDLE_TIMEOUT (HZ / 3)
static int __init nohlt_setup(char *__unused)
{
hlt_counter = 1;
return 1;
}
static int __init hlt_setup(char *__unused)
{
hlt_counter = 0;
return 1;
}
__setup("nohlt", nohlt_setup);
__setup("hlt", hlt_setup);
static inline void hlt(void)
{
__asm__ __volatile__ ("sleep" : : : "memory");
}
/*
* The idle loop on a uniprocessor SH..
*/
void cpu_idle(void)
{
/* endless idle loop with no priority at all */
while (1) {
if (hlt_counter) {
while (!need_resched())
cpu_relax();
} else {
local_irq_disable();
while (!need_resched()) {
local_irq_enable();
hlt();
local_irq_disable();
}
local_irq_enable();
}
preempt_enable_no_resched();
schedule();
preempt_disable();
}
}
void machine_restart(char * __unused)
{
extern void phys_stext(void);
@ -97,13 +47,6 @@ void machine_halt(void)
void machine_power_off(void)
{
#if 0
/* Disable watchdog timer */
ctrl_outl(0xa5000000, WTCSR);
/* Configure deep standby on sleep */
ctrl_outl(0x03, STBCR);
#endif
__asm__ __volatile__ (
"sleep\n\t"
"synci\n\t"
@ -113,9 +56,6 @@ void machine_power_off(void)
panic("Unexpected wakeup!\n");
}
void (*pm_power_off)(void) = machine_power_off;
EXPORT_SYMBOL(pm_power_off);
void show_regs(struct pt_regs * regs)
{
unsigned long long ah, al, bh, bl, ch, cl;