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/system.h> 12 13 void (*pm_power_off)(void); 14 EXPORT_SYMBOL(pm_power_off); 15 16 #ifdef CONFIG_SUPERH32 17 static void watchdog_trigger_immediate(void) 18 { 19 sh_wdt_write_cnt(0xFF); 20 sh_wdt_write_csr(0xC2); 21 } 22 #endif 23 24 static void native_machine_restart(char * __unused) 25 { 26 local_irq_disable(); 27 28 /* Address error with SR.BL=1 first. */ 29 trigger_address_error(); 30 31 #ifdef CONFIG_SUPERH32 32 /* If that fails or is unsupported, go for the watchdog next. */ 33 watchdog_trigger_immediate(); 34 #endif 35 36 /* 37 * Give up and sleep. 38 */ 39 while (1) 40 cpu_sleep(); 41 } 42 43 static void native_machine_shutdown(void) 44 { 45 smp_send_stop(); 46 } 47 48 static void native_machine_power_off(void) 49 { 50 if (pm_power_off) 51 pm_power_off(); 52 } 53 54 static void native_machine_halt(void) 55 { 56 /* stop other cpus */ 57 machine_shutdown(); 58 59 /* stop this cpu */ 60 stop_this_cpu(NULL); 61 } 62 63 struct machine_ops machine_ops = { 64 .power_off = native_machine_power_off, 65 .shutdown = native_machine_shutdown, 66 .restart = native_machine_restart, 67 .halt = native_machine_halt, 68 #ifdef CONFIG_KEXEC 69 .crash_shutdown = native_machine_crash_shutdown, 70 #endif 71 }; 72 73 void machine_power_off(void) 74 { 75 machine_ops.power_off(); 76 } 77 78 void machine_shutdown(void) 79 { 80 machine_ops.shutdown(); 81 } 82 83 void machine_restart(char *cmd) 84 { 85 machine_ops.restart(cmd); 86 } 87 88 void machine_halt(void) 89 { 90 machine_ops.halt(); 91 } 92 93 #ifdef CONFIG_KEXEC 94 void machine_crash_shutdown(struct pt_regs *regs) 95 { 96 machine_ops.crash_shutdown(regs); 97 } 98 #endif 99