// SPDX-License-Identifier: GPL-2.0 #include <linux/pm.h> #include <linux/kexec.h> #include <linux/kernel.h> #include <linux/reboot.h> #include <linux/module.h> #include <asm/watchdog.h> #include <asm/addrspace.h> #include <asm/reboot.h> #include <asm/tlbflush.h> #include <asm/traps.h> void (*pm_power_off)(void); EXPORT_SYMBOL(pm_power_off); static void watchdog_trigger_immediate(void) { sh_wdt_write_cnt(0xFF); sh_wdt_write_csr(0xC2); } static void native_machine_restart(char * __unused) { local_irq_disable(); /* Destroy all of the TLBs in preparation for reset by MMU */ __flush_tlb_global(); /* Address error with SR.BL=1 first. */ trigger_address_error(); /* If that fails or is unsupported, go for the watchdog next. */ watchdog_trigger_immediate(); /* * Give up and sleep. */ while (1) cpu_sleep(); } static void native_machine_shutdown(void) { smp_send_stop(); } static void native_machine_power_off(void) { if (pm_power_off) pm_power_off(); } static void native_machine_halt(void) { /* stop other cpus */ machine_shutdown(); /* stop this cpu */ stop_this_cpu(NULL); } struct machine_ops machine_ops = { .power_off = native_machine_power_off, .shutdown = native_machine_shutdown, .restart = native_machine_restart, .halt = native_machine_halt, #ifdef CONFIG_KEXEC .crash_shutdown = native_machine_crash_shutdown, #endif }; void machine_power_off(void) { machine_ops.power_off(); } void machine_shutdown(void) { machine_ops.shutdown(); } void machine_restart(char *cmd) { machine_ops.restart(cmd); } void machine_halt(void) { machine_ops.halt(); } #ifdef CONFIG_KEXEC void machine_crash_shutdown(struct pt_regs *regs) { machine_ops.crash_shutdown(regs); } #endif