1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Joshua Henderson <joshua.henderson@microchip.com>
4 * Copyright (C) 2015 Microchip Technology Inc. All rights reserved.
5 */
6 #include <linux/init.h>
7 #include <linux/pm.h>
8 #include <asm/reboot.h>
9 #include <asm/mach-pic32/pic32.h>
10
11 #define PIC32_RSWRST 0x10
12
13 static void pic32_halt(void)
14 {
15 while (1) {
16 __asm__(".set push;\n"
17 ".set arch=r4000;\n"
18 "wait;\n"
19 ".set pop;\n"
20 );
21 }
22 }
23
24 static void pic32_machine_restart(char *command)
25 {
26 void __iomem *reg =
27 ioremap(PIC32_BASE_RESET + PIC32_RSWRST, sizeof(u32));
28
29 pic32_syskey_unlock();
30
31 /* magic write/read */
32 __raw_writel(1, reg);
33 (void)__raw_readl(reg);
34
35 pic32_halt();
36 }
37
38 static void pic32_machine_halt(void)
39 {
40 local_irq_disable();
41
42 pic32_halt();
43 }
44
45 static int __init mips_reboot_setup(void)
46 {
47 _machine_restart = pic32_machine_restart;
48 _machine_halt = pic32_machine_halt;
49 pm_power_off = pic32_machine_halt;
50
51 return 0;
52 }
53
54 arch_initcall(mips_reboot_setup);
55
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