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/arch/sh/kernel/reboot.c

https://gitlab.com/teobaluta/opw
C | 102 lines | 77 code | 17 blank | 8 comment | 2 complexity | 13a09346b492e8d0527866f61369f5d4 MD5 | raw file
  1#include <linux/pm.h>
  2#include <linux/kexec.h>
  3#include <linux/kernel.h>
  4#include <linux/reboot.h>
  5#include <linux/module.h>
  6#ifdef CONFIG_SUPERH32
  7#include <asm/watchdog.h>
  8#endif
  9#include <asm/addrspace.h>
 10#include <asm/reboot.h>
 11#include <asm/tlbflush.h>
 12#include <asm/traps.h>
 13
 14void (*pm_power_off)(void);
 15EXPORT_SYMBOL(pm_power_off);
 16
 17#ifdef CONFIG_SUPERH32
 18static void watchdog_trigger_immediate(void)
 19{
 20	sh_wdt_write_cnt(0xFF);
 21	sh_wdt_write_csr(0xC2);
 22}
 23#endif
 24
 25static void native_machine_restart(char * __unused)
 26{
 27	local_irq_disable();
 28
 29	/* Destroy all of the TLBs in preparation for reset by MMU */
 30	__flush_tlb_global();
 31
 32	/* Address error with SR.BL=1 first. */
 33	trigger_address_error();
 34
 35#ifdef CONFIG_SUPERH32
 36	/* If that fails or is unsupported, go for the watchdog next. */
 37	watchdog_trigger_immediate();
 38#endif
 39
 40	/*
 41	 * Give up and sleep.
 42	 */
 43	while (1)
 44		cpu_sleep();
 45}
 46
 47static void native_machine_shutdown(void)
 48{
 49	smp_send_stop();
 50}
 51
 52static void native_machine_power_off(void)
 53{
 54	if (pm_power_off)
 55		pm_power_off();
 56}
 57
 58static void native_machine_halt(void)
 59{
 60	/* stop other cpus */
 61	machine_shutdown();
 62
 63	/* stop this cpu */
 64	stop_this_cpu(NULL);
 65}
 66
 67struct machine_ops machine_ops = {
 68	.power_off	= native_machine_power_off,
 69	.shutdown	= native_machine_shutdown,
 70	.restart	= native_machine_restart,
 71	.halt		= native_machine_halt,
 72#ifdef CONFIG_KEXEC
 73	.crash_shutdown = native_machine_crash_shutdown,
 74#endif
 75};
 76
 77void machine_power_off(void)
 78{
 79	machine_ops.power_off();
 80}
 81
 82void machine_shutdown(void)
 83{
 84	machine_ops.shutdown();
 85}
 86
 87void machine_restart(char *cmd)
 88{
 89	machine_ops.restart(cmd);
 90}
 91
 92void machine_halt(void)
 93{
 94	machine_ops.halt();
 95}
 96
 97#ifdef CONFIG_KEXEC
 98void machine_crash_shutdown(struct pt_regs *regs)
 99{
100	machine_ops.crash_shutdown(regs);
101}
102#endif