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

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/kernel/Makefile_32

@@ -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

arch/sh/kernel/Makefile_64

@@ -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
 

arch/sh/kernel/idle.c

@@ -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();
+	}
+}

arch/sh/kernel/process_32.c

@@ -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) */

arch/sh/kernel/process_64.c

@@ -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;