arch/cris/kernel/process.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *  linux/arch/cris/kernel/process.c
   4  *
   5  *  Copyright (C) 1995  Linus Torvalds
   6  *  Copyright (C) 2000-2002  Axis Communications AB
   7  *
   8  *  Authors:   Bjorn Wesen (bjornw@axis.com)
   9  *
  10  */
  11
  12 /*
  13  * This file handles the architecture-dependent parts of process handling..
  14  */
  15
  16 #include <linux/atomic.h>
  17 #include <asm/pgtable.h>
  18 #include <linux/uaccess.h>
  19 #include <asm/irq.h>
  20 #include <linux/module.h>
  21 #include <linux/spinlock.h>
  22 #include <linux/init_task.h>
  23 #include <linux/sched.h>
  24 #include <linux/sched/task.h>
  25 #include <linux/fs.h>
  26 #include <linux/user.h>
  27 #include <linux/elfcore.h>
  28 #include <linux/mqueue.h>
  29 #include <linux/reboot.h>
  30 #include <linux/rcupdate.h>
  31
  32 //#define DEBUG
  33
  34 extern void default_idle(void);
  35
  36 void (*pm_power_off)(void);
  37 EXPORT_SYMBOL(pm_power_off);
  38
  39 void arch_cpu_idle(void)
  40 {
  41         default_idle();
  42 }
  43
  44 void hard_reset_now (void);
  45
  46 void machine_restart(char *cmd)
  47 {
  48         hard_reset_now();
  49 }
  50
  51 /*
  52  * Similar to machine_power_off, but don't shut off power.  Add code
  53  * here to freeze the system for e.g. post-mortem debug purpose when
  54  * possible.  This halt has nothing to do with the idle halt.
  55  */
  56
  57 void machine_halt(void)
  58 {
  59 }
  60
  61 /* If or when software power-off is implemented, add code here.  */
  62
  63 void machine_power_off(void)
  64 {
  65 }
  66
  67 /*
  68  * When a process does an "exec", machine state like FPU and debug
  69  * registers need to be reset.  This is a hook function for that.
  70  * Currently we don't have any such state to reset, so this is empty.
  71  */
  72
  73 void flush_thread(void)
  74 {
  75 }
  76
  77 /* Fill in the fpu structure for a core dump. */
  78 int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)
  79 {
  80         return 0;
  81 }