arch/cris/kernel/process.c

   1 /*
   2  *  linux/arch/cris/kernel/process.c
   3  *
   4  *  Copyright (C) 1995  Linus Torvalds
   5  *  Copyright (C) 2000-2002  Axis Communications AB
   6  *
   7  *  Authors:   Bjorn Wesen (bjornw@axis.com)
   8  *
   9  */
  10
  11 /*
  12  * This file handles the architecture-dependent parts of process handling..
  13  */
  14
  15 #include <linux/atomic.h>
  16 #include <asm/pgtable.h>
  17 #include <linux/uaccess.h>
  18 #include <asm/irq.h>
  19 #include <linux/module.h>
  20 #include <linux/spinlock.h>
  21 #include <linux/init_task.h>
  22 #include <linux/sched.h>
  23 #include <linux/fs.h>
  24 #include <linux/user.h>
  25 #include <linux/elfcore.h>
  26 #include <linux/mqueue.h>
  27 #include <linux/reboot.h>
  28 #include <linux/rcupdate.h>
  29
  30 //#define DEBUG
  31
  32 extern void default_idle(void);
  33
  34 void (*pm_power_off)(void);
  35 EXPORT_SYMBOL(pm_power_off);
  36
  37 void arch_cpu_idle(void)
  38 {
  39         default_idle();
  40 }
  41
  42 void hard_reset_now (void);
  43
  44 void machine_restart(char *cmd)
  45 {
  46         hard_reset_now();
  47 }
  48
  49 /*
  50  * Similar to machine_power_off, but don't shut off power.  Add code
  51  * here to freeze the system for e.g. post-mortem debug purpose when
  52  * possible.  This halt has nothing to do with the idle halt.
  53  */
  54
  55 void machine_halt(void)
  56 {
  57 }
  58
  59 /* If or when software power-off is implemented, add code here.  */
  60
  61 void machine_power_off(void)
  62 {
  63 }
  64
  65 /*
  66  * When a process does an "exec", machine state like FPU and debug
  67  * registers need to be reset.  This is a hook function for that.
  68  * Currently we don't have any such state to reset, so this is empty.
  69  */
  70
  71 void flush_thread(void)
  72 {
  73 }
  74
  75 /* Fill in the fpu structure for a core dump. */
  76 int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)
  77 {
  78         return 0;
  79 }