LXR linux/drivers/ps3/sys-manager-core.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 *  PS3 System Manager core.
   4 *
   5 *  Copyright (C) 2007 Sony Computer Entertainment Inc.
   6 *  Copyright 2007 Sony Corp.
   7 */
   8
   9#include <linux/kernel.h>
  10#include <linux/export.h>
  11#include <asm/lv1call.h>
  12#include <asm/ps3.h>
  13
  14/**
  15 * Staticly linked routines that allow late binding of a loaded sys-manager
  16 * module.
  17 */
  18
  19static struct ps3_sys_manager_ops ps3_sys_manager_ops;
  20
  21/**
  22 * ps3_register_sys_manager_ops - Bind ps3_sys_manager_ops to a module.
  23 * @ops: struct ps3_sys_manager_ops.
  24 *
  25 * To be called from ps3_sys_manager_probe() and ps3_sys_manager_remove() to
  26 * register call back ops for power control.  Copies data to the static
  27 * variable ps3_sys_manager_ops.
  28 */
  29
  30void ps3_sys_manager_register_ops(const struct ps3_sys_manager_ops *ops)
  31{
  32        BUG_ON(!ops);
  33        BUG_ON(!ops->dev);
  34        ps3_sys_manager_ops = ops ? *ops : ps3_sys_manager_ops;
  35}
  36EXPORT_SYMBOL_GPL(ps3_sys_manager_register_ops);
  37
  38void __noreturn ps3_sys_manager_power_off(void)
  39{
  40        if (ps3_sys_manager_ops.power_off)
  41                ps3_sys_manager_ops.power_off(ps3_sys_manager_ops.dev);
  42
  43        ps3_sys_manager_halt();
  44}
  45
  46void __noreturn ps3_sys_manager_restart(void)
  47{
  48        if (ps3_sys_manager_ops.restart)
  49                ps3_sys_manager_ops.restart(ps3_sys_manager_ops.dev);
  50
  51        ps3_sys_manager_halt();
  52}
  53
  54void __noreturn ps3_sys_manager_halt(void)
  55{
  56        pr_emerg("System Halted, OK to turn off power\n");
  57        local_irq_disable();
  58        while (1)
  59                lv1_pause(1);
  60}
  61
  62