1// SPDX-License-Identifier: GPL-2.0
 2#include <linux/pm.h>
 3#include <linux/kexec.h>
 4#include <linux/kernel.h>
 5#include <linux/reboot.h>
 6#include <linux/module.h>
 7#include <asm/watchdog.h>
 8#include <asm/addrspace.h>
 9#include <asm/reboot.h>
10#include <asm/tlbflush.h>
11#include <asm/traps.h>
12
13void (*pm_power_off)(void);
14EXPORT_SYMBOL(pm_power_off);
15
16static void watchdog_trigger_immediate(void)
17{
18	sh_wdt_write_cnt(0xFF);
19	sh_wdt_write_csr(0xC2);
20}
21
22static void native_machine_restart(char * __unused)
23{
24	local_irq_disable();
25
26	/* Destroy all of the TLBs in preparation for reset by MMU */
27	__flush_tlb_global();
28
29	/* Address error with SR.BL=1 first. */
30	trigger_address_error();
31
32	/* If that fails or is unsupported, go for the watchdog next. */
33	watchdog_trigger_immediate();
34
35	/*
36	 * Give up and sleep.
37	 */
38	while (1)
39		cpu_sleep();
40}
41
42static void native_machine_shutdown(void)
43{
44	smp_send_stop();
45}
46
47static void native_machine_power_off(void)
48{
49	do_kernel_power_off();
 
50}
51
52static void native_machine_halt(void)
53{
54	/* stop other cpus */
55	machine_shutdown();
56
57	/* stop this cpu */
58	stop_this_cpu(NULL);
59}
60
61struct machine_ops machine_ops = {
62	.power_off	= native_machine_power_off,
63	.shutdown	= native_machine_shutdown,
64	.restart	= native_machine_restart,
65	.halt		= native_machine_halt,
66#ifdef CONFIG_KEXEC
67	.crash_shutdown = native_machine_crash_shutdown,
68#endif
69};
70
71void machine_power_off(void)
72{
73	machine_ops.power_off();
74}
75
76void machine_shutdown(void)
77{
78	machine_ops.shutdown();
79}
80
81void machine_restart(char *cmd)
82{
83	machine_ops.restart(cmd);
84}
85
86void machine_halt(void)
87{
88	machine_ops.halt();
89}
90
91#ifdef CONFIG_KEXEC
92void machine_crash_shutdown(struct pt_regs *regs)
93{
94	machine_ops.crash_shutdown(regs);
95}
96#endif

 1// SPDX-License-Identifier: GPL-2.0
 2#include <linux/pm.h>
 3#include <linux/kexec.h>
 4#include <linux/kernel.h>
 5#include <linux/reboot.h>
 6#include <linux/module.h>
 7#include <asm/watchdog.h>
 8#include <asm/addrspace.h>
 9#include <asm/reboot.h>
10#include <asm/tlbflush.h>
11#include <asm/traps.h>
12
13void (*pm_power_off)(void);
14EXPORT_SYMBOL(pm_power_off);
15
16static void watchdog_trigger_immediate(void)
17{
18	sh_wdt_write_cnt(0xFF);
19	sh_wdt_write_csr(0xC2);
20}
21
22static void native_machine_restart(char * __unused)
23{
24	local_irq_disable();
25
26	/* Destroy all of the TLBs in preparation for reset by MMU */
27	__flush_tlb_global();
28
29	/* Address error with SR.BL=1 first. */
30	trigger_address_error();
31
32	/* If that fails or is unsupported, go for the watchdog next. */
33	watchdog_trigger_immediate();
34
35	/*
36	 * Give up and sleep.
37	 */
38	while (1)
39		cpu_sleep();
40}
41
42static void native_machine_shutdown(void)
43{
44	smp_send_stop();
45}
46
47static void native_machine_power_off(void)
48{
49	if (pm_power_off)
50		pm_power_off();
51}
52
53static void native_machine_halt(void)
54{
55	/* stop other cpus */
56	machine_shutdown();
57
58	/* stop this cpu */
59	stop_this_cpu(NULL);
60}
61
62struct machine_ops machine_ops = {
63	.power_off	= native_machine_power_off,
64	.shutdown	= native_machine_shutdown,
65	.restart	= native_machine_restart,
66	.halt		= native_machine_halt,
67#ifdef CONFIG_KEXEC
68	.crash_shutdown = native_machine_crash_shutdown,
69#endif
70};
71
72void machine_power_off(void)
73{
74	machine_ops.power_off();
75}
76
77void machine_shutdown(void)
78{
79	machine_ops.shutdown();
80}
81
82void machine_restart(char *cmd)
83{
84	machine_ops.restart(cmd);
85}
86
87void machine_halt(void)
88{
89	machine_ops.halt();
90}
91
92#ifdef CONFIG_KEXEC
93void machine_crash_shutdown(struct pt_regs *regs)
94{
95	machine_ops.crash_shutdown(regs);
96}
97#endif