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 #include <asm/tlbflush.h> 13 14 void (*pm_power_off)(void); 15 EXPORT_SYMBOL(pm_power_off); 16 17 #ifdef CONFIG_SUPERH32 18 static void watchdog_trigger_immediate(void) 19 { 20 sh_wdt_write_cnt(0xFF); 21 sh_wdt_write_csr(0xC2); 22 } 23 #endif 24 25 static void native_machine_restart(char * __unused) 26 { 27 local_irq_disable(); 28 29 /* Destroy all of the TLBs in preparation for reset by MMU */ 30 __flush_tlb_global(); 31 32 /* Address error with SR.BL=1 first. */ 33 trigger_address_error(); 34 35 #ifdef CONFIG_SUPERH32 36 /* If that fails or is unsupported, go for the watchdog next. */ 37 watchdog_trigger_immediate(); 38 #endif 39 40 /* 41 * Give up and sleep. 42 */ 43 while (1) 44 cpu_sleep(); 45 } 46 47 static void native_machine_shutdown(void) 48 { 49 smp_send_stop(); 50 } 51 52 static void native_machine_power_off(void) 53 { 54 if (pm_power_off) 55 pm_power_off(); 56 } 57 58 static void native_machine_halt(void) 59 { 60 /* stop other cpus */ 61 machine_shutdown(); 62 63 /* stop this cpu */ 64 stop_this_cpu(NULL); 65 } 66 67 struct machine_ops machine_ops = { 68 .power_off = native_machine_power_off, 69 .shutdown = native_machine_shutdown, 70 .restart = native_machine_restart, 71 .halt = native_machine_halt, 72 #ifdef CONFIG_KEXEC 73 .crash_shutdown = native_machine_crash_shutdown, 74 #endif 75 }; 76 77 void machine_power_off(void) 78 { 79 machine_ops.power_off(); 80 } 81 82 void machine_shutdown(void) 83 { 84 machine_ops.shutdown(); 85 } 86 87 void machine_restart(char *cmd) 88 { 89 machine_ops.restart(cmd); 90 } 91 92 void machine_halt(void) 93 { 94 machine_ops.halt(); 95 } 96 97 #ifdef CONFIG_KEXEC 98 void machine_crash_shutdown(struct pt_regs *regs) 99 { 100 machine_ops.crash_shutdown(regs); 101 } 102 #endif 103