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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
fbb82b03 PM |
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> | |
fbb82b03 | 7 | #include <asm/watchdog.h> |
fbb82b03 PM |
8 | #include <asm/addrspace.h> |
9 | #include <asm/reboot.h> | |
59615ecd | 10 | #include <asm/tlbflush.h> |
e839ca52 | 11 | #include <asm/traps.h> |
fbb82b03 PM |
12 | |
13 | void (*pm_power_off)(void); | |
14 | EXPORT_SYMBOL(pm_power_off); | |
15 | ||
fbb82b03 PM |
16 | static void watchdog_trigger_immediate(void) |
17 | { | |
18 | sh_wdt_write_cnt(0xFF); | |
19 | sh_wdt_write_csr(0xC2); | |
20 | } | |
fbb82b03 PM |
21 | |
22 | static void native_machine_restart(char * __unused) | |
23 | { | |
24 | local_irq_disable(); | |
25 | ||
59615ecd PM |
26 | /* Destroy all of the TLBs in preparation for reset by MMU */ |
27 | __flush_tlb_global(); | |
28 | ||
fbb82b03 PM |
29 | /* Address error with SR.BL=1 first. */ |
30 | trigger_address_error(); | |
31 | ||
fbb82b03 PM |
32 | /* If that fails or is unsupported, go for the watchdog next. */ |
33 | watchdog_trigger_immediate(); | |
fbb82b03 PM |
34 | |
35 | /* | |
36 | * Give up and sleep. | |
37 | */ | |
38 | while (1) | |
39 | cpu_sleep(); | |
40 | } | |
41 | ||
42 | static void native_machine_shutdown(void) | |
43 | { | |
44 | smp_send_stop(); | |
45 | } | |
46 | ||
47 | static void native_machine_power_off(void) | |
48 | { | |
49 | if (pm_power_off) | |
50 | pm_power_off(); | |
51 | } | |
52 | ||
53 | static 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 | ||
62 | struct 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 | ||
72 | void machine_power_off(void) | |
73 | { | |
74 | machine_ops.power_off(); | |
75 | } | |
76 | ||
77 | void machine_shutdown(void) | |
78 | { | |
79 | machine_ops.shutdown(); | |
80 | } | |
81 | ||
82 | void machine_restart(char *cmd) | |
83 | { | |
84 | machine_ops.restart(cmd); | |
85 | } | |
86 | ||
87 | void machine_halt(void) | |
88 | { | |
89 | machine_ops.halt(); | |
90 | } | |
91 | ||
92 | #ifdef CONFIG_KEXEC | |
93 | void machine_crash_shutdown(struct pt_regs *regs) | |
94 | { | |
95 | machine_ops.crash_shutdown(regs); | |
96 | } | |
97 | #endif |