#include <linux/kallsyms.h>
#include <linux/kexec.h>
#include <linux/kdebug.h>
+#include <linux/tick.h>
+#include <linux/reboot.h>
+#include <linux/fs.h>
+#include <linux/preempt.h>
#include <asm/uaccess.h>
#include <asm/mmu_context.h>
#include <asm/pgalloc.h>
static int hlt_counter;
int ubc_usercnt = 0;
-#define HARD_IDLE_TIMEOUT (HZ / 3)
-
void (*pm_idle)(void);
void (*pm_power_off)(void);
EXPORT_SYMBOL(pm_power_off);
}
EXPORT_SYMBOL(enable_hlt);
+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);
+
void default_idle(void)
{
- if (!hlt_counter)
- cpu_sleep();
- else
- cpu_relax();
+ if (!hlt_counter) {
+ clear_thread_flag(TIF_POLLING_NRFLAG);
+ smp_mb__after_clear_bit();
+ set_bl_bit();
+ while (!need_resched())
+ cpu_sleep();
+ 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();
while (!need_resched())
idle();
+ tick_nohz_restart_sched_tick();
preempt_enable_no_resched();
schedule();
ctrl_outl(pc, UBC_BARA);
#ifdef CONFIG_MMU
- /* We don't have any ASID settings for the SH-2! */
- if (current_cpu_data.type != CPU_SH7604)
- ctrl_outb(asid, UBC_BASRA);
+ ctrl_outb(asid, UBC_BASRA);
#endif
ctrl_outl(0, UBC_BAMRA);
unlazy_fpu(prev, task_pt_regs(prev));
#endif
-#ifdef CONFIG_PREEMPT
+#if defined(CONFIG_GUSA) && defined(CONFIG_PREEMPT)
{
- unsigned long flags;
struct pt_regs *regs;
- local_irq_save(flags);
+ preempt_disable();
regs = task_pt_regs(prev);
if (user_mode(regs) && regs->regs[15] >= 0xc0000000) {
int offset = (int)regs->regs[15];
/* Go to rewind point */
regs->pc = regs->regs[0] + offset;
}
- local_irq_restore(flags);
+ preempt_enable_no_resched();
}
#endif
unsigned long r6, unsigned long r7,
struct pt_regs __regs)
{
- struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
#ifdef CONFIG_MMU
+ struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
return do_fork(SIGCHLD, regs->regs[15], regs, 0, NULL, NULL);
#else
/* fork almost works, enough to trick you into looking elsewhere :-( */
/*
* sys_execve() executes a new program.
*/
-asmlinkage int sys_execve(char *ufilename, char **uargv,
- char **uenvp, unsigned long r7,
+asmlinkage int sys_execve(char __user *ufilename, char __user * __user *uargv,
+ char __user * __user *uenvp, unsigned long r7,
struct pt_regs __regs)
{
struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
int error;
char *filename;
- filename = getname((char __user *)ufilename);
+ filename = getname(ufilename);
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
- error = do_execve(filename,
- (char __user * __user *)uargv,
- (char __user * __user *)uenvp,
- regs);
+ error = do_execve(filename, uargv, uenvp, regs);
if (error == 0) {
task_lock(current);
current->ptrace &= ~PT_DTRACE;
unsigned long get_wchan(struct task_struct *p)
{
- unsigned long schedule_frame;
unsigned long pc;
if (!p || p == current || p->state == TASK_RUNNING)
* The same comment as on the Alpha applies here, too ...
*/
pc = thread_saved_pc(p);
+
+#ifdef CONFIG_FRAME_POINTER
if (in_sched_functions(pc)) {
- schedule_frame = (unsigned long)p->thread.sp;
+ unsigned long schedule_frame = (unsigned long)p->thread.sp;
return ((unsigned long *)schedule_frame)[21];
}
+#endif
return pc;
}