1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
4 */
5 #include <linux/kernel.h>
6 #include <linux/acpi.h>
7 #include <linux/efi.h>
8 #include <linux/export.h>
9 #include <linux/pm.h>
10 #include <linux/types.h>
11 #include <linux/reboot.h>
12 #include <linux/delay.h>
13 #include <linux/console.h>
14
15 #include <acpi/reboot.h>
16 #include <asm/idle.h>
17 #include <asm/loongarch.h>
18 #include <asm/loongson.h>
19
20 void (*pm_power_off)(void);
21 EXPORT_SYMBOL(pm_power_off);
22
23 void machine_halt(void)
24 {
25 #ifdef CONFIG_SMP
26 preempt_disable();
27 smp_send_stop();
28 #endif
29 local_irq_disable();
30 clear_csr_ecfg(ECFG0_IM);
31
32 pr_notice("\n\n** You can safely turn off the power now **\n\n");
33 console_flush_on_panic(CONSOLE_FLUSH_PENDING);
34
35 while (true) {
36 __arch_cpu_idle();
37 }
38 }
39
40 void machine_power_off(void)
41 {
42 #ifdef CONFIG_SMP
43 preempt_disable();
44 smp_send_stop();
45 #endif
46 #ifdef CONFIG_PM
47 if (!acpi_disabled)
48 enable_pci_wakeup();
49 #endif
50 do_kernel_power_off();
51 #ifdef CONFIG_EFI
52 efi.reset_system(EFI_RESET_SHUTDOWN, EFI_SUCCESS, 0, NULL);
53 #endif
54
55 while (true) {
56 __arch_cpu_idle();
57 }
58 }
59
60 void machine_restart(char *command)
61 {
62 #ifdef CONFIG_SMP
63 preempt_disable();
64 smp_send_stop();
65 #endif
66 do_kernel_restart(command);
67 #ifdef CONFIG_EFI
68 if (efi_capsule_pending(NULL))
69 efi_reboot(REBOOT_WARM, NULL);
70 else
71 efi_reboot(REBOOT_COLD, NULL);
72 #endif
73 if (!acpi_disabled)
74 acpi_reboot();
75
76 while (true) {
77 __arch_cpu_idle();
78 }
79 }
80
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