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175 lines
4.0 KiB
175 lines
4.0 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* |
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* Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology |
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* Author: Fuxin Zhang, [email protected] |
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* Copyright (C) 2009 Lemote, Inc. |
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* Author: Zhangjin Wu, [email protected] |
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*/ |
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#include <linux/cpu.h> |
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#include <linux/delay.h> |
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#include <linux/init.h> |
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#include <linux/kexec.h> |
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#include <linux/pm.h> |
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#include <linux/slab.h> |
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#include <asm/bootinfo.h> |
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#include <asm/idle.h> |
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#include <asm/reboot.h> |
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#include <loongson.h> |
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#include <boot_param.h> |
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static void loongson_restart(char *command) |
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{ |
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void (*fw_restart)(void) = (void *)loongson_sysconf.restart_addr; |
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fw_restart(); |
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while (1) { |
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if (cpu_wait) |
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cpu_wait(); |
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} |
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} |
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static void loongson_poweroff(void) |
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{ |
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void (*fw_poweroff)(void) = (void *)loongson_sysconf.poweroff_addr; |
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fw_poweroff(); |
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while (1) { |
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if (cpu_wait) |
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cpu_wait(); |
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} |
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} |
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static void loongson_halt(void) |
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{ |
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pr_notice("\n\n** You can safely turn off the power now **\n\n"); |
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while (1) { |
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if (cpu_wait) |
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cpu_wait(); |
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} |
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} |
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#ifdef CONFIG_KEXEC |
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/* 0X80000000~0X80200000 is safe */ |
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#define MAX_ARGS 64 |
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#define KEXEC_CTRL_CODE 0xFFFFFFFF80100000UL |
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#define KEXEC_ARGV_ADDR 0xFFFFFFFF80108000UL |
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#define KEXEC_ARGV_SIZE COMMAND_LINE_SIZE |
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#define KEXEC_ENVP_SIZE 4800 |
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static int kexec_argc; |
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static int kdump_argc; |
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static void *kexec_argv; |
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static void *kdump_argv; |
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static void *kexec_envp; |
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static int loongson_kexec_prepare(struct kimage *image) |
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{ |
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int i, argc = 0; |
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unsigned int *argv; |
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char *str, *ptr, *bootloader = "kexec"; |
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/* argv at offset 0, argv[] at offset KEXEC_ARGV_SIZE/2 */ |
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if (image->type == KEXEC_TYPE_DEFAULT) |
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argv = (unsigned int *)kexec_argv; |
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else |
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argv = (unsigned int *)kdump_argv; |
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argv[argc++] = (unsigned int)(KEXEC_ARGV_ADDR + KEXEC_ARGV_SIZE/2); |
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for (i = 0; i < image->nr_segments; i++) { |
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if (!strncmp(bootloader, (char *)image->segment[i].buf, |
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strlen(bootloader))) { |
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/* |
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* convert command line string to array |
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* of parameters (as bootloader does). |
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*/ |
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int offt; |
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str = (char *)argv + KEXEC_ARGV_SIZE/2; |
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memcpy(str, image->segment[i].buf, KEXEC_ARGV_SIZE/2); |
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ptr = strchr(str, ' '); |
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while (ptr && (argc < MAX_ARGS)) { |
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*ptr = '\0'; |
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if (ptr[1] != ' ') { |
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offt = (int)(ptr - str + 1); |
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argv[argc] = KEXEC_ARGV_ADDR + KEXEC_ARGV_SIZE/2 + offt; |
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argc++; |
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} |
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ptr = strchr(ptr + 1, ' '); |
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} |
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break; |
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} |
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} |
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if (image->type == KEXEC_TYPE_DEFAULT) |
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kexec_argc = argc; |
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else |
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kdump_argc = argc; |
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/* kexec/kdump need a safe page to save reboot_code_buffer */ |
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image->control_code_page = virt_to_page((void *)KEXEC_CTRL_CODE); |
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return 0; |
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} |
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static void loongson_kexec_shutdown(void) |
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{ |
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#ifdef CONFIG_SMP |
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int cpu; |
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/* All CPUs go to reboot_code_buffer */ |
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for_each_possible_cpu(cpu) |
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if (!cpu_online(cpu)) |
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cpu_device_up(get_cpu_device(cpu)); |
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secondary_kexec_args[0] = TO_UNCAC(0x3ff01000); |
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#endif |
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kexec_args[0] = kexec_argc; |
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kexec_args[1] = fw_arg1; |
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kexec_args[2] = fw_arg2; |
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memcpy((void *)fw_arg1, kexec_argv, KEXEC_ARGV_SIZE); |
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memcpy((void *)fw_arg2, kexec_envp, KEXEC_ENVP_SIZE); |
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} |
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static void loongson_crash_shutdown(struct pt_regs *regs) |
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{ |
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default_machine_crash_shutdown(regs); |
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kexec_args[0] = kdump_argc; |
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kexec_args[1] = fw_arg1; |
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kexec_args[2] = fw_arg2; |
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#ifdef CONFIG_SMP |
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secondary_kexec_args[0] = TO_UNCAC(0x3ff01000); |
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#endif |
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memcpy((void *)fw_arg1, kdump_argv, KEXEC_ARGV_SIZE); |
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memcpy((void *)fw_arg2, kexec_envp, KEXEC_ENVP_SIZE); |
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} |
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#endif |
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static int __init mips_reboot_setup(void) |
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{ |
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_machine_restart = loongson_restart; |
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_machine_halt = loongson_halt; |
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pm_power_off = loongson_poweroff; |
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#ifdef CONFIG_KEXEC |
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kexec_argv = kmalloc(KEXEC_ARGV_SIZE, GFP_KERNEL); |
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kdump_argv = kmalloc(KEXEC_ARGV_SIZE, GFP_KERNEL); |
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kexec_envp = kmalloc(KEXEC_ENVP_SIZE, GFP_KERNEL); |
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fw_arg1 = KEXEC_ARGV_ADDR; |
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memcpy(kexec_envp, (void *)fw_arg2, KEXEC_ENVP_SIZE); |
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_machine_kexec_prepare = loongson_kexec_prepare; |
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_machine_kexec_shutdown = loongson_kexec_shutdown; |
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_machine_crash_shutdown = loongson_crash_shutdown; |
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#endif |
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return 0; |
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} |
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arch_initcall(mips_reboot_setup);
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